# Menu 11 − Miscellaneous

Mode: Open‑Loop

Parameter | 11.018 Status Mode Parameter 1
--- | ---
Short description | Defines the parameter displayed on the upper row of the keypad when in status mode
Mode | Open‑Loop
Minimum | 0.000 | Maximum | 30.999
Default | 2.001 | Units |
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 3
Coding | RW, PT, BU

Status Mode Parameter 1 (11.018) and Status Mode Parameter 2 (11.019) defines which parameters are displayed in Status mode.

If one of the two Status parameter does not exist or is 0.000, only one Status parameter is displayed.

If the two Status parameters do not exist or are 0.000, the active parameter is displayed.

Parameter | 11.019 Status Mode Parameter 2
--- | ---
Short description | Defines the parameter displayed on the lower row of the keypad when in status mode
Mode | Open‑Loop
Minimum | 0.000 | Maximum | 30.999
Default | 4.020 | Units |
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 3
Coding | RW, PT, BU

See Status Mode Parameter 1 (11.018).

Parameter | 11.020 Reset Serial Communications
--- | ---
Short description | Set to one to update communications set-up
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default |  | Units |
Type | 1 Bit Volatile | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, ND, NC

When Serial Address (11.023), Serial Mode (11.024), Serial Baud Rate (11.025), Minimum Comms Transmit Delay (11.026) or Silent Period (11.027) are modified the changes do not have an immediate effect on the serial communications system. The new values are used after the next power-up or if Reset Serial Communications (11.020) is set to one. Reset Serial Communications (11.020) is automatically cleared to zero after the communications system is updated.

Parameter | 11.021 Customer defined scaling
--- | ---
Short description | Defines the scaling of 11.018 in status view
Mode | Open‑Loop
Minimum | 0.000 | Maximum | 10.000
Default | 1.000 | Units |
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 3
Coding | RW

Customer defined scaling (11.021) defines the scaling applied to Status Mode Parameter 1 (11.018). The scaling is only applied in the Status mode.

Parameter | 11.022 Active Parameter At Power-up
--- | ---
Short description | Defines which parameter is displayed at power-up in view mode
Mode | Open‑Loop
Minimum | 0.000 | Maximum | 0.080
Default | 0.010 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 3
Coding | RW, PT, BU

Active Parameter At Power-up (11.022) defines which Menu 0 parameter is initially active at power-up in view mode.

See Status Mode Parameter 1 (11.018).

Parameter | 11.023 Serial Address
--- | ---
Short description | Defines the serial address of the drive
Mode | Open‑Loop
Minimum | 1 | Maximum | 247
Default | 1 | Units |
Type | 8 Bit User Save | Update Rate | Read on serial communications reset
Display Format | Standard | Decimal Places | 0
Coding | RW, BU

Serial Address (11.023) defines the node address for the serial comms interface in the range from 1 to 247.

Serial Address (11.023) to Silent Period (11.027) can be used to change the configuration of the drive 485 serial interface if present on the MFP adapter. The master should wait at least 20ms before sending a new message using the new protocol.

Changing the parameters does not immediately change the serial communications settings. See Reset Serial Communications (11.020) for more details.

Parameter | 11.024 Serial Mode
--- | ---
Short description | Defines the serial mode of the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 11
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Read on serial communications reset
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | 8 2 NP
1 | 8 1 NP
2 | 8 1 EP
3 | 8 1 OP
4 | 8 2 NP M
5 | 8 1 NP M
6 | 8 1 EP M
7 | 8 1 OP M
8 | 7 1 EP
9 | 7 1 OP
10 | 7 1 EP M
11 | 7 1 OP M

The core drive always uses the Modbus rtu protocol and is always a slave. Serial Mode (11.024) defines the data format used by the serial comms interface. The bits in the value of Serial Mode (11.024) define the data format as follows. Bit 3 is always 0 in the core product as 8 data bits are required for Modbus rtu. The parameter value can be extended in derivative products which provide alternative communications protocols if required.

Bits | 3 | 2 | 1 and 0
Format | Number of data bits 0 = 8 bits | Register mode 0 = Standard 1 = Modified | Stop bits and parity 0 = 2 stop bits, no parity 1 = 1 stop bit, no parity 2 = 1 stop bit, even parity 3 = 1 stop bit, odd parity

Bit 2 selects either standard or modified register mode. The menu and parameter numbers are derived for each mode as given in the table below. Standard mode is compatible with Commander SK. Modified mode is provided to allow register numbers up to 255 to be addressed. If any menus with numbers above 63 should contain more than 99 parameters, then these parameters cannot be accessed via Modbus rtu.

Register mode | Register address
Standard | (mm x 100) + ppp - 1 where mm ≤ 162 and ppp ≤ 99
Modified | (mm x 256) + ppp - 1 where mm ≤ 63 and ppp ≤ 255

Changing the parameters does not immediately change the serial communications settings. See Reset Serial Communications (11.020) for more details.

Parameter | 11.025 Serial Baud Rate
--- | ---
Short description | Defines the serial baud rate of the drive
Mode | Open‑Loop
Minimum | 1 | Maximum | 10
Default | 6 | Units | Baud
Type | 8 Bit User Save | Update Rate | Read on serial communications reset
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
1 | 600
2 | 1200
3 | 2400
4 | 4800
5 | 9600
6 | 19200
7 | 38400
8 | 57600
9 | 76800
10 | 115200

Serial Baud Rate (11.025) defines the baud rate used by the serial comms interface.

Changing the parameters does not immediately change the serial communications settings. See Reset Serial Communications (11.020) for more details.

Parameter | 11.026 Minimum Comms Transmit Delay
--- | ---
Short description | Defines the minimum delay between the host and drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 250
Default | 2 | Units | ms
Type | 8 Bit User Save | Update Rate | Read on serial communications reset
Display Format | Standard | Decimal Places | 0
Coding | RW, BU

There will always be a finite delay between the end of a message from the host (master) and the time at which the host is ready to receive the response from the drive (slave). The drive does not respond until at least 1ms after the message has been received from the host allowing 1ms for the host to change from transmit to receive mode. This initial delay can be extended using Minimum Comms Transmit Delay (11.026) if required.

Minimum Comms Transmit Delay (11.026) | Action
0 | The transmitters are turned on and data transmission begins immediately after the initial delay (≥1ms)
1 | The transmitters are turned on after the initial delay (≥1ms) and data transmission begins 1ms later
2 or more | The transmitters are turned on after a delay of at least the time specified by Minimum Comms Transmit Delay (11.026) and data transmission begins 1ms later

The drive holds its own transmitters active for up to 1ms after it has transmitted data before switching to the receive mode; the host should not send any data during this time.

Changing the parameters does not immediately change the serial communications settings. See Reset Serial Communications (11.020) for more details.

Parameter | 11.027 Silent Period
--- | ---
Short description | Defines the idle time required to detect the end of a received data message
Mode | Open‑Loop
Minimum | 0 | Maximum | 250
Default | 0 | Units | ms
Type | 8 Bit User Save | Update Rate | Read on serial communications reset
Display Format | Standard | Decimal Places | 0
Coding | RW, BU

The silent period defines the idle time required to detect the end of a received data message. If Silent Period (11.027) = 0 then the silent period is at least 3.5 characters at the selected baud rate. This is the standard silent period for Modbus rtu. If Silent Period (11.027) is non-zero it defines the minimum silent period in milliseconds.

Changing the parameters does not immediately change the serial communications settings. See Reset Serial Communications (11.020) for more details.

Parameter | 11.028 Drive Derivative
--- | ---
Short description | Displays the drive derivative identifier
Mode | Open‑Loop
Minimum | 0 | Maximum | 255
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

A drive can be made into a derivative drive by adding a derivative customisation image. The derivative software should specify a derivative identifier which is put into Drive Derivative (11.028) at power-up. Each derivative should have a unique identifier.

Parameter | 11.029 Software Version
--- | ---
Short description | Displays the software version in the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 99999999
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | Version | Decimal Places | 0
Coding | RO, ND, NC, PT

Software Version (11.029) displays the drive software version number as a decimal number wwxxyy.

Parameter | 11.030 User Security Code
--- | ---
Short description | Defines the user security code of the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 9999
Default |  | Units |
Type | 32 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, ND, NC, PT

Defines the user security code of the drive.

Parameter | 11.031 User Drive Mode
--- | ---
Short description | Defines the mode of the drive
Mode | Open‑Loop
Minimum | 1 | Maximum | 2
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE, ND, NC, PT

Value | Text
1 | Open-loop
2 | RFC-A

Select the drive mode on drive reset. The drive must be inactive (Drive Active (10.002) = 0) to take effect.

This parameter will change Drive Mode (11.084) to the active mode.

Parameter | 11.032 Maximum Heavy Duty Rating
--- | ---
Short description | Displays the maximum heavy duty current rating of the drive
Mode | Open‑Loop
Minimum | 0.00 | Maximum | 9999.99
Default |  | Units | A
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 2
Coding | RO, ND, NC, PT

Maximum Heavy Duty Rating (11.032) defines the maximum setting for Motor Rated Current that gives heavy duty operation. If Maximum Heavy Duty Rating (11.032) = 0.00 then heavy duty operation is not possible. If Maximum Heavy Duty Rating (11.032) = VM_RATED_CURRENT[MAX] then normal duty operation is not possible.

Parameter | 11.033 Drive Rated Voltage
--- | ---
Short description | Displays the voltage rating of the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 4
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT

Value | Text
0 | 110V
1 | 200V
2 | 400V
3 | 575V
4 | 690V

Drive Rated Voltage (11.033) shows the input voltage rating of the drive.

Parameter | 11.034 Drive Configuration
--- | ---
Short description | Defines the configuration of the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 9
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Actioned on exit of edit mode and on drive reset
Display Format | Standard | Decimal Places | 0
Coding | RW, TE, PT, BU

Value | Text | Description
0 | AV | Analog input 1 (voltage) Analog input 2 (voltage) selected by terminal (Local/Remote)
1 | AI | Analog input 1 (current) or Analog input 2 (voltage) selected by terminal (Local/Remote)
2 | AV Preset | Analog input 1 (voltage) or 3 presets selected by terminal
3 | AI Preset | Analog input 1 (current) or 3 presets selected by terminal
4 | Preset | Four presets selected by terminal
5 | Keypad | Keypad reference
6 | Keypad Ref | Keypad reference with terminal control
7 | Electronic Pot | Electronic Potentiometer
8 | Torque Control | Torque mode, Analog input 1 (current frequency reference) or Analog input 2 (voltage torque reference) selected by terminal
9 | Pid Control | PID mode, Analog input 1 (current feedback source) and Analog input 2 (voltage reference source)

This parameter is used to automatically setup the user programmable area in the level 2 parameter set according to drive configurations. Other default values may also be changed by drive configuration. Parameters are stored in EEPROM automatically following a configuration change. Defaults are loaded before drive configuration changes are made. Defaults loaded are defined by Defaults Previously Loaded (11.046).

Action will only occur if the drive is inactive, not in UU state and no User Actions are running. Otherwise, the parameter will return to its pre altered value on exit from edit mode.

All parameters are saved if this parameter changes.

Parameter number | AV | AI | AV Preset | AI Preset | Preset | Keypad | Keypad Ref | Electronic Pot | Torque Control | Pid Control
Reference Selector (01.014) | 0 | 0 | 1 | 1 | 3 | 4 | 6 | 3 | 0 | 1
Start/Stop Logic Select (06.004) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5
Analogue Input 1 Mode (07.007) | 6 | 4 | 6 | 4 | 6 | 6 | 6 | 6 | 4 | 4
Analogue Input 2 Mode (07.011) | 6 | 6 | 7 | 7 | 7 | 6 | 6 | 7 | 6 | 6
Analogue Input 1 Control (07.051) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
Analogue Input 1 Destination A (07.010) | 1.036 | 1.036 | 1.036 | 1.036 | 1.036 | 1.036 | 1.036 | 1.036 | 1.036 | 0.000
Analogue Input 2 Destination A (07.014) | 1.037 | 1.037 | 1.046 | 1.046 | 1.046 | 1.037 | 1.037 | 9.027 | 4.008 | 0.000
Digital IO2 Source/Destination A (08.022) | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000
DI2 Control (08.082) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Digital Input 05 Destination A (08.025) | 1.041 | 1.041 | 1.045 | 1.045 | 1.045 | 1.041 | 1.041 | 9.026 | 4.011 | 14.008
DI5 Control (08.085) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0
Motorised Pot Destination (09.025) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.021 | 0 | 0
PID1 Reference Source (14.003) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0021
PID1 Feedback Source (14.004) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.001
PID1 Destination (14.016) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.036

Parameter | 11.035 Power Software Version
--- | ---
Short description | Displays the power processor firmware
Mode | Open‑Loop
Minimum | 0 | Maximum | 99999999
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | Version | Decimal Places | 0
Coding | RO, ND, NC, PT

Indicates the version of power processor software fitted.

Parameter | 11.036 NV Media Card File Previously Loaded
--- | ---
Short description | Displays the number of the last parameter file transferred from an NV Media Card to the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 999
Default | 0 | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, NC, PT

NV Media Card File Previously Loaded (11.036) shows the number of the last parameter file transferred from an NV Media Card to the drive. If defaults are subsequently reloaded NV Media Card File Previously Loaded (11.036) is set to 0.

Parameter | 11.037 NV Media Card File Number
--- | ---
Short description | Selects a file by its file identification number
Mode | Open‑Loop
Minimum | 0 | Maximum | 999
Default | 0 | Units |
Type | 16 Bit Volatile | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

NV Media Card File Number (11.037) is used to select a file by its file identification number and can only be changed to values that correspond to files that are recognised by the drive on the NV media card or a value of 0. When NV Media Card File Number (11.037) corresponds to the number of a file the following data about the file is shown.

Parameter
NV Media Card File Type (11.038)
NV Media Card File Version (11.039)

The actions of erasing a card, erasing a file, creating a new file, changing a Menu 0 parameter or removing a card resets NV Media Card File Number (11.037) to 0.

Parameter | 11.038 NV Media Card File Type
--- | ---
Short description | Displays the file type of the file selected
Mode | Open‑Loop
Minimum | 0 | Maximum | 5
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT

Value | Text
0 | None
1 | Open-loop
2 | RFC-A
5 | User Program

NV Media Card File Type (11.038) shows the file type of the file selected with NV Media Card File Number (11.037) as shown in the table below.

NV Media Card File Type (11.038) | File
0 | No file selected
1 | Open-loop mode parameter file
2 | RFC-A mode parameter file
3 | Reserved
4 | Reserved
5 | Onboard user program file

Parameter | 11.039 NV Media Card File Version
--- | ---
Short description | Displays the version number stored with the file selected
Mode | Open‑Loop
Minimum | 0 | Maximum | 9999
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

NV Media Card File Version (11.039) shows the version number stored with the file selected with NV Media Card File Number (11.037).

Parameter | 11.042 Parameter Cloning
--- | ---
Short description | Defines the behaviour of cloning to an NV media card
Mode | Open‑Loop
Minimum | 0 | Maximum | 4
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RW, TE, NC

Value | Text
0 | None
1 | Read
2 | Program
3 | Auto
4 | Boot

Parameter Cloning (11.042) can also be used to initiate data transfer to or from an NV media card as described below for each possible value of this parameter.

1: Read
Provided a parameter file with file identification number 1 exists on the NV media card then setting Parameter Cloning (11.042) = 1 and initiating a drive reset will transfer the parameter data to the drive (i.e. the same action as writing 6001 to Parameter mm.000 (mm.000)). When the action is complete Parameter Cloning (11.042) is automatically reset to zero.

2: Program
Setting Parameter Cloning (11.042) = 2 and initiating a drive reset will transfer the parameter data from the drive to a parameter file with file identification number 1. This is the same action as writing 4001 to Parameter mm.000 (mm.000) except that the file will be overwritten if it already exists. When the action is complete Parameter Cloning (11.042) is automatically reset to zero.

3: Auto
Setting Parameter Cloning (11.042) = 3 and initiating a drive reset will transfer the parameter data from the drive to a parameter file with file identification number 1. This is the same action as writing 4001 to Parameter mm.000 (mm.000) except that the file will be overwritten if it already exists. When the action is complete Parameter Cloning (11.042) remains at 3.

If the card is removed when Parameter Cloning (11.042) = 3, then Parameter Cloning (11.042) is set to 0, which forces the user to change Parameter Cloning (11.042) back to 3 if auto mode is still required. The user will need to set Parameter Cloning (11.042) = 3 and initiate a drive reset to write the complete parameter set to the new card.

When a parameter in Menu zero is changed via the keypad and Parameter Cloning (11.042) = 3 the parameter is saved both to the drive non-volatile memory and to the parameter file with identification number 1 on the card. Only the new value of the modified parameter, and not the value of all the other drive parameters, is stored each time. If Parameter Cloning (11.042) is not cleared automatically when a card is removed, then when a new card is inserted that contains a parameter file with identification number 1 the modified parameter would be written to the existing file on the new card and the rest of the parameters in this file may not be the same as those in the drive.

When Parameter Cloning (11.042) = 3 and the drive parameters are saved to non-volatile memory, the file on the card is also updated, therefore this file becomes a copy of the drive parameters. At power up, if Parameter Cloning (11.042) = 3, the drive will save its complete parameter set to the card. This is done to ensure that if a card is inserted whilst the drive is powered down the new card will have the correct data after the drive is powered up again.

4: Boot
When Parameter Cloning (11.042) = 4 the drive operates in the same way as with Parameter Cloning (11.042) = 3 and automatically creates a copy of it parameters on the NV Media card. The NC (not clonable) attribute for Parameter Cloning (11.042) is 1, and so it does not have a value stored in the parameter file on the card in the normal way. However, the value of Parameter Cloning (11.042) is held in the parameter file header. If Parameter Cloning (11.042) = 4 in the parameter file with a file identification value of 1 on an NV media card fitted to a drive at power-up then the following actions are taken:

1. The parameters from the parameter file with file identification number 1 are transferred to the drive and then saved in non-volatile memory.
2. If an onboard user program file with file identification number 2 exists then the onboard user program from this file is transferred to the drive.
3. Parameter Cloning (11.042) is set to 0 after the data transfer is complete.

It is possible to create a bootable parameter file by setting Parameter mm.000 (mm.000) = 2001 and initiating a drive reset. This file is created in one operation and is not updated when further parameter changes are made.

When the drive is powered up it detects which option modules are fitted before loading parameters from an NV media card which has been set up for boot mode. If a new option module has been fitted since the last time the drive was powered up, a Slot1 Different trip is initiated and then the parameters are transferred from the card. If the parameter file includes the parameters for the newly fitted option module then these are also transferred to the drive and the Slot1 Different trip is reset. If the parameter file does not include the parameters for the newly fitted option module then the drive does not reset the Slot1 Different trip. Once the transfer is complete the drive parameters are saved to non-volatile memory. The trip can be reset either by initiating a drive reset or by powering down and then powering up again.

Parameter | 11.043 Load Defaults
--- | ---
Short description | Defines which defaults are to be loaded into the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 2
Default | 0 | Units |
Type | 8 Bit Volatile | Update Rate | Exit from edit of menus 0 or a drive reset.
Display Format | Standard | Decimal Places | 0
Coding | RW, TE, NC

Value | Text
0 | None
1 | Standard
2 | US

If Load Defaults (11.043) is non-zero and a drive reset (or exit from edit on menu 0) is initiated then the drive will load and save default parameters. If Load Defaults (11.043) = 1 then standard defaults are loaded and if Load Defaults (11.043) = 2 then US defaults are loaded. This parameter has priority over actions defined by Parameter mm.000 (mm.000) and Parameter Cloning (11.042). If Load Defaults (11.043) is used to initiate loading defaults then it is cleared along with Parameter mm.00 and Parameter Cloning (11.042) when the action is completed.

Parameter | 11.044 User Security Status
--- | ---
Short description | Defines the security level within the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 5
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE, ND, PT

Value | Text
0 | Menu 0
1 | All Menus
2 | Read-only Menu 0
3 | Read-only
4 | Status Only
5 | No Access

Parameter | 11.045 Select Motor 2 Parameters
--- | ---
Short description | Set to 1 to select motor 2 parameters
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | Motor 1
1 | Motor 2

Select Motor 2 Parameters (11.045) is used to select the motor map 2 parameters from Menu 21 to be substituted for the standard motor parameters. If Select Motor 2 Parameters (11.045) is modified when Drive Active (10.002) = 1 the change only becomes effective when Drive Active (10.002) = 0. When Select Motor 2 Parameters (11.045) = 1 the results from auto-tuning are written to the motor map 2 parameters in Menu 21 instead of to the standard parameters. Each time Select Motor 2 Parameters (11.045) is changed Motor Protection Accumulator (04.019) is reset to zero. Motor 2 Active (21.015) shows the motor map that is active.

Parameter | 11.046 Defaults Previously Loaded
--- | ---
Short description | Displays the defaults previously loaded in the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 2000
Default |  | Units |
Type | 16 Bit User Save | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Defaults Previously Loaded (11.046) shows the value used to load the previously loaded defaults (i.e. 1233 for standard defaults, or 1244 for US defaults).

Parameter | 11.047 Onboard User Program: Enable
--- | ---
Short description | Enables the onboard user program
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default | 1 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | Stop
1 | Run

Onboard user programming provides a background task that loops continuously and a timed task that is executed each time at a defined rate.

Onboard User Program: Enable (11.047) allows the onboard user program to be stopped or run.

0: Stop
The onboard user program is stopped. If it is restarted by setting Onboard User Program: Enable (11.047) to a non-zero value the background task starts from the beginning.

1: Run
The onboard user program will run.

Parameter | 11.048 Onboard User Program: Status
--- | ---
Short description | Displays the status of the onboard user program
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Onboard User Program: Status (11.048) shows the status of the onboard user program. This is a value written to this parameter from the user program itself.

0: Stopped
Indicates that a valid user program is present, but not currently running.

1: Running
Indicates that a valid user program is present and running.

3: Not present
Indicates that no user program is present.

Parameter | 11.049 Onboard User Program: Programming Events
--- | ---
Short description | Displays the number of programming events of the onboard user program
Mode | Open‑Loop
Minimum | 0 | Maximum | 65535
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

Onboard User Program: Programming Events (11.049) = 0 when the drive is manufactured and is incremented each time an onboard user program image is written to the drive. If an onboard user program image is written more than 65535 times Onboard User Program: Programming Events (11.049) = 65535. Onboard User Program: Programming Events (11.049) shows how many times the flash memory within the drive has been reprogrammed.

Parameter | 11.050 Onboard User Program: FreewheelingTasks Per Second
--- | ---
Short description | Displays the rate of freewheeling tasks of the onboard user program
Mode | Open‑Loop
Minimum | 0 | Maximum | 65535
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

During each scan in a background task it is possible to give an indication to the drive that the scan loop is starting. If this indication is given then Onboard User Program: FreewheelingTasks Per Second (11.050) will give the number of times this indication is given per second.

Parameter | 11.051 Onboard User Program: Clock Task Time Used
--- | ---
Short description | Displays the percentage of the available time used by the onboard user program clock task
Mode | Open‑Loop
Minimum | 0.0 | Maximum | 100.0
Default |  | Units | %
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 1
Coding | RO, ND, NC, PT

Onboard User Program: Clock Task Time Used (11.051) shows the percentage of the available time used by the onboard user program timed task.

Parameter | 11.052 Serial Number LS
--- | ---
Short description | Shows the least significant 9 decimal digits of the drive serial number
Mode | Open‑Loop
Minimum | 0 (Display: 000000) | Maximum | 999999 (Display: 999999)
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | Lead Zero Pad | Decimal Places | 0
Coding | RO, ND, NC, PT

The drive serial number is available as a pair of 32 bit values where Serial Number LS (11.052) provides the least significant 6 decimal digits and Serial Number MS (11.053) provides the most significant 4 decimal digits. The reconstructed serial number is ((Serial Number MS (11.053) x 1000000) + Serial Number LS (11.052)).

Example 1
Serial number "1234567890" would be stored as 11.053 = 1234, 11.052 = 567890.

Example 2
Serial number "1234000056" would be stored as 11.053 = 1234, 11.052 = 56. Serial Number LS (11.052) will be shown on the keypad as 000056 (i.e. including the leading zeros).

Parameter | 11.053 Serial Number MS
--- | ---
Short description | Shows the most significant 9 decimal digits of the drive serial number
Mode | Open‑Loop
Minimum | 0 | Maximum | 999999
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

See Serial Number LS (11.052).

Parameter | 11.054 Drive Date Code
--- | ---
Short description | Shows the drive date code
Mode | Open‑Loop
Minimum | 0 (Display: 0000) | Maximum | 9999 (Display: 9999)
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Lead Zero Pad | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

Drive Date Code (11.054) is a four-digit number in the form yyww where yy is the year and ww is the week.

Parameter | 11.055 Onboard User Program: Clock Task Schedule Rate
--- | ---
Short description | Displays the interval at which the clock task is scheduled in ms
Mode | Open‑Loop
Minimum | 0 | Maximum | 262128
Default |  | Units | ms
Type | 32 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Onboard User Program: Clock Task Schedule Rate (11.055) shows the rate at which the timed task is scheduled in ms.

Parameter | 11.060 Maximum Rated Current
--- | ---
Short description | Displays the maximum rated current or normal duty rating of the drive
Mode | Open‑Loop
Minimum | 0.000 | Maximum | 999.999
Default |  | Units | A
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 3
Coding | RO, ND, NC, PT

Maximum Rated Current (11.060) defines the variable maximum VM_RATED_CURRENT[MAX] which defines the maximum Motor Rated Current (05.007). Therefore Maximum Maximum Rated Current (11.060) is the maximum rated current for normal duty operation (if normal duty operation is allowed).

Parameter | 11.061 Full Scale Current Kc
--- | ---
Short description | Displays the full scale current Kc
Mode | Open‑Loop
Minimum | 0.000 | Maximum | 999.999
Default |  | Units | A
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 3
Coding | RO, ND, NC, PT

Full Scale Current Kc (11.061) shows the full scale current in r.m.s. Amps. If the drive current exceeds this level it will cause an over-current trip.

Parameter | 11.063 Product Type
--- | ---
Short description | Displays the core product type
Mode | Open‑Loop
Minimum | 0 | Maximum | 255
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

Product Type (11.063) shows the core product type as given in the table below. The drive could be the basic product or a derivative of the basic product as defined by Drive Derivative (11.028).

Product Type (11.063) | Core product range
0 | Unidrive M600 to M800
1 | Unidrive M100 to M400

Parameter | 11.064 Product Identifier Characters
--- | ---
Short description | Displays the product identifier characters
Mode | Open‑Loop
Minimum | 1295265840 | Maximum | 2147483647
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | String | Decimal Places | 0
Coding | RO, ND, NC, PT

The drive model and rating can be identified as AAAAnnnpppppBBBBCCCCDDDD where each section of the model identifier is taken from a parameter. 'AAAA', 'BBBB', 'CCCC' and 'DDDD' is alpha-numeric characters. 'nnn' and 'ppppp' are decimal digits.

The drive model and rating can be identified as AAAA B nnnppppp CCCC DD EE FFF where each section of the model identifier is taken from a parameter. AAAA, B, CCCC, DDDD, EE and FFF are alpha-numeric characters. nnn and ppppp are decimal digits.

Section of identifier | Parameter
AAAA | Product Identifier Characters (11.064)
nnn | Frame size and voltage code (11.065)
ppppp | Drive current rating (11.068)
CCCC | Additional Identifier Characters 1 (11.091)
DDEE | Additional Identifier Characters 2 (11.092)
FFFB | Additional Identifier Characters 3 (11.093)

Product Identifier Characters (11.064) as defined in the table below.

Digits | Meaning
3 to 0 | Product identifier (i.e. M100, M201)

Frame size and voltage code (11.065)is split into two fields as defined in the table below.

Digits | Meaning
2 to 1 | Frame size determined by Derivative or required current.
0 | Voltage code (1 = 110V, 2 = 230V, 4 = 400V, 5 = 575V, 6 = 690V)

Drive current rating (11.068) is as defined in the table below.

Digits | Meaning
4 to 0 | Drive current rating (i.e. 00133 = 13.3A)

Example
The model number M101-04200133 A101 00 AB100 would be displayed in parameters as follows

Parameter | Value
Product Identifier Characters (11.064) | M101
Frame size and voltage code (11.065) | 042
Drive current rating (11.068) | 00133
Additional Identifier Characters 1 (11.091) | A101
Additional Identifier Characters 2 (11.092) | 00AB
Additional Identifier Characters 3 (11.093) | 100-

Parameter | 11.065 Frame size and voltage code
--- | ---
Short description | Displays the frame size and voltage code
Mode | Open‑Loop
Minimum | 0 (Display: 000) | Maximum | 999 (Display: 999)
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Power-up write
Display Format | Lead Zero Pad | Decimal Places | 0
Coding | RO, ND, NC, PT

See Product Identifier Characters (11.064).

Parameter | 11.066 Power Stage Identifier
--- | ---
Short description | Displays the power stage identifiers within the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 255
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

Power Stage Identifier (11.066) is used to show power stages that require changes to the drive user parameters (i.e. visibility, range or defaults). It is anticipated that all power stages will require the same parameter structure, and so Power Stage Identifier (11.066) will always be equal to zero. It should be noted that this parameter does not identify the rating of the power stage.

Power Stage Identifier (11.066) | Power stage
0 | Standard M600-M800
1 | Standard M100-M400

Parameter | 11.067 Control Board Identifier
--- | ---
Short description | Displays the control board identifiers within the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 255
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT, BU

Control Board Identifier (11.067) identifies the main control board hardware as given in the table below.

Control Board Identifier (11.067) | Control board
0 | Reserved
1 | Reserved
2 | M100
3 | Reserved
4 | Reserved
5 | M101
6 | Reserved
7 | Reserved
8 | M200
9 | Reserved
10 | Reserved
11 | M201
12 | Reserved
13 | Reserved
14 | M300
15 | Reserved
16 | Reserved
17 | M400
18 | Reserved

Parameter | 11.068 Drive current rating
--- | ---
Short description | Drive current rating in 0.1 of Amps
Mode | Open‑Loop
Minimum | 0 (Display: 00000) | Maximum | 32767 (Display: 32767)
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Power-up write
Display Format | Lead Zero Pad | Decimal Places | 0
Coding | RO, ND, NC, PT

See Product Identifier Characters (11.064).

Parameter | 11.070 Core Parameter Database Version
--- | ---
Short description | Displays the core parameter datatbase version within the drive
Mode | Open‑Loop
Minimum | 0.00 | Maximum | 99.99
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Power-up write
Display Format | Standard | Decimal Places | 2
Coding | RO, ND, NC, PT

Core Parameter Database Version (11.070) gives the version number of the parameter database used to define the core parameter menus in the drive (Menu 1 to 14 and 21 to 23) in 2 digit BCD format. All other menus are customisable and if these menus are changed their default values are automatically loaded. However, if the drive software is changed it may be necessary to load defaults for all menus, although this will only be required rarely. Defaults for all menus are loaded when the most significant digit of Core Parameter Database Version (11.070) changes. Therefore if the drive firmware is modified and the most significant digit of the core database version has changed an EEPROM Fail.001 trip is initiated and default parameters are loaded.

Parameter | 11.072 NV Media Card Create Special File
--- | ---
Short description | Defines if a parameter file is created as a macro file during transfer
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 8 Bit Volatile | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, NC

If NV Media Card Create Special File (11.072) = 1 when a parameter file is transferred to an NV media card the file is created as a macro file. NV Media Card Create Special File (11.072) is reset to 0 after the file is created or the transfer fails.

Parameter | 11.073 NV Card Type Fitted
--- | ---
Short description | Displays the type of the currently fitted NV media card
Mode | Open‑Loop
Minimum | 0 | Maximum | 2
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT

Value | Text
0 | None
1 | Reserved
2 | SD Card

NV Card Type Fitted (11.073) shows the type of non-volatile media card inserted in the drive.

Parameter | 11.075 NV Media Card Read-only Flag
--- | ---
Short description | Displays the state of the read-only flag for the currently fitted card
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default |  | Units |
Type | 1 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

NV Media Card Read-only Flag (11.075) shows the state of the read-only flag for the currently fitted card.

Parameter | 11.076 NV Media Card Warning Suppression Flag
--- | ---
Short description | Displays the state of the warning flag for the currently fitted card
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default |  | Units |
Type | 1 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

NV Media Card Warning Suppression Flag (11.076) shows the state of the warning flag for the currently fitted card.

Parameter | 11.077 NV Media Card File Required Version
--- | ---
Short description | Displays the version number for a file when it is created on an NV media card
Mode | Open‑Loop
Minimum | 0 | Maximum | 9999
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RW, ND, NC, PT

The value of NV Media Card File Required Version (11.077) is used as the version number for a file when it is created on an NV media card. NV Media Card File Required Version (11.077) is reset to 0 when the file is created or the transfer fails.

Parameter | 11.079 Drive Name Characters 1-4
--- | ---
Short description | Defines characters 1-4 of a string which can be used to identify the drive
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default | 757935405 | Units |
Type | 32 Bit User Save | Update Rate | N/A
Display Format | String | Decimal Places | 0
Coding | RW, PT

Drive Name Characters 1-4 (11.079) to Drive Name Characters 13-16 (11.082) can be used to store a 16 character string which can be used to identify the drive. The string is arranged as shown below.

This uses the standard ASCII character set.

If Status Mode Parameter 1 (11.018) or Status Mode Parameter 2 (11.019) are set to 11.079 then the drive name is fully displayed in status view using Drive Name Characters 1-4 (11.079) to Drive Name Characters 13-16 (11.082). Note that only 15 characters can be displayed on M400 and only 6 characters on M100-M300.

Parameter | 11.080 Drive Name Characters 5-8
--- | ---
Short description | Defines characters 5-8 of a string which can be used to identify the drive
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default | 757935405 | Units |
Type | 32 Bit User Save | Update Rate | N/A
Display Format | String | Decimal Places | 0
Coding | RW, PT

See Drive Name Characters 1-4 (11.079).

Parameter | 11.081 Drive Name Characters 9-12
--- | ---
Short description | Defines characters 9-12 of a string which can be used to identify the drive
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default | 757935405 | Units |
Type | 32 Bit User Save | Update Rate | N/A
Display Format | String | Decimal Places | 0
Coding | RW, PT

See Drive Name Characters 1-4 (11.079).

Parameter | 11.082 Drive Name Characters 13-16
--- | ---
Short description | Defines characters 13-16 of a string which can be used to identify the drive
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default | 757935405 | Units |
Type | 32 Bit User Save | Update Rate | N/A
Display Format | String | Decimal Places | 0
Coding | RW, PT

See Drive Name Characters 1-4 (11.079).

Parameter | 11.084 Drive Mode
--- | ---
Short description | Defines and displays the current drive mode
Mode | Open‑Loop
Minimum | 1 | Maximum | 2
Default |  | Units |
Type | 8 Bit User Save | Update Rate | Background read/write
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT

Value | Text
1 | Open-loop
2 | RFC-A

Drive Mode (11.084) is used to hold the currently active drive mode.

Parameter | 11.085 Security Status
--- | ---
Short description | Displays the security status within the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 3
Default |  | Units |
Type | 8 Bit Power Down Save | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT

Value | Text
0 | None
1 | Read-only
2 | Status-only
3 | No Access

Security Status (11.085) shows the security that will apply when security is enabled by setting a non-zero value for User Security Code (11.030).

Parameter | 11.086 Menu Access Status
--- | ---
Short description | Displays the amount of access of the menus within the drive
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default |  | Units |
Type | 8 Bit Power Down Save | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT

Value | Text
0 | Menu 0
1 | All Menus

If Menu Access Status (11.086) = 0 then only Menu 0 can be accessed with a keypad. If Menu Access Status (11.086) = 1 then all menus can be accessed with a keypad.

Parameter | 11.090 Keypad Port Serial Address
--- | ---
Short description | Defines the node address for the keypad port serial comms interface
Mode | Open‑Loop
Minimum | 1 | Maximum | 16
Default | 1 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

Keypad Port Serial Address (11.090) defines the node address for the keypad port serial comms interface. Normally the default value of 1 is used, but this can be changed if required. The keypad attached to the port will sense the address automatically.

Parameter | 11.091 Additional Identifier Characters 1
--- | ---
Short description | Displays the additional identifier characters
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | String | Decimal Places | 0
Coding | RO, ND, NC, PT

See Product Identifier Characters (11.064).

Parameter | 11.092 Additional Identifier Characters 2
--- | ---
Short description | Displays the additional identifier characters
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | String | Decimal Places | 0
Coding | RO, ND, NC, PT

See Product Identifier Characters (11.064).

Parameter | 11.093 Additional Identifier Characters 3
--- | ---
Short description | Displays the additional identifier characters
Mode | Open‑Loop
Minimum | -2147483648 | Maximum | 2147483647
Default |  | Units |
Type | 32 Bit Volatile | Update Rate | Power-up write
Display Format | String | Decimal Places | 0
Coding | RO, ND, NC, PT

See Product Identifier Characters (11.064).

Parameter | 11.097 AI ID Code
--- | ---
Short description | Indicates the AI module type fitted in the AI slot
Mode | Open‑Loop
Minimum | 0 | Maximum | 4
Default |  | Units |
Type | 8 Bit Volatile | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RO, TE, ND, NC, PT, BU

Value | Text
0 | None
1 | SD Card
2 | RS-485
3 | boot
4 | RS-485

AI ID Code (11.097) indicates the Adaptor Interface module type fitted in the AI slot.

Parameter | 11.098 24V Alarm Loss Enable
--- | ---
Short description | Indicate if the 24V alarm loss is enabled
Mode | Open‑Loop
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 1 Bit User Save | Update Rate | background
Display Format | Standard | Decimal Places | 0
Coding | RW

24V Alarm Loss Enable (11.098) enable the 24V alarm loss. If 24V Supply Input State (08.043) = 0 and 24V Alarm Loss Enable (11.098) = 1 then the 24V is active.

Parameter | 11.099 Modbus Parameter Conversion
--- | ---
Short description | Convert read/write parameter via Modbus serial comm.
Mode | Open‑Loop
Minimum | 0 (Display: 0000) | Maximum | 15 (Display: 1111)
Default | 0 (Display: 0000) | Units |
Type | 16 Bit User Save | Update Rate |
Display Format | Binary | Decimal Places | 0
Coding | RW

If Modbus Parameter Conversion (11.099) bits are turned on then the following parameters are converted when read or written by modbus serial comm.

This is NOT a full comms compatibility to previous drive generations. Only the following parameters are converted.

Modbus Parameter Conversion (11.099) bits | Effect
0 | Frequency parameters: 1.001,1.002,1.003,1.004,1.005,1.006,1.007,1.017,1.021,1.022, 1.023,1.024,1.025,1.026,1.027,1.028,1.029,1.030,1.031,1.032, 1.033,1.034,1.036,1.037,1.038,2.001,3.005,3.006,3.022,3.043, 3.045,5.001,5.006,12.044,12.045,21.001,21.002,21.006 scaled by 10.
1 | Source/Destination parameters: 7.010,7.014,7.019,8.021,8.022,8.023,8.024,8.025,8.028,9.004,9.006, 9.010,9.014,9.016,9.020,9.025,9.033,12.003,12.007,12.008,12.009, 12.011,12.023,12.027,12.028,12.029,12.031,14.002,14.003,14.004,14.009,14.016. Parameter number is converted from 3 to 2 digits (i.e. #1.01 is #1.001)
2 | Percentage parameters: 7.001,7.002,7.030,7.031,9.003,12.004,12.005,12.012,12.024,12.025, 12.032,14.001,14.013,14.014,14.019,14.020,14.021,14.022 scaled by 10
3 | Motor parameters: 5.008,5.017,5.024,21.008,21.012,21.014 scaled by 10

Examples:

bit 0:

> 01.021 = 1.23Hz and Modbus Parameter Conversion (11.099) = 1 then value read is 12 equivalent of 1.20Hz

> 01.021 = 1.23Hz and Modbus Parameter Conversion (11.099) = 0 then value read is 123 equivalent of 1.23Hz

> Value 123 is written to 01.021 and Modbus Parameter Conversion (11.099) = 1 then 01.021 = 12.30Hz

> Value 123 is written to 01.021 and Modbus Parameter Conversion (11.099) = 0 then 01.021 = 1.23Hz