Motor Contactor Monitoring
The drive can monitor the state of the motor contactor by using an auxiliary contact connected to one of the drives digital input terminals, this allows early detection of a motor contactor fault.
The diagram below illustrates the motor Contactor Monitoring function.
Above shows the configuration to setup the Motor Contactor Monitoring Function with Macros 1-12
If the contactor is not in the correct state during start run or stop the drive will trip. This prevents situations where the contactor has welded and is not opening and the drive is still running.
If Macro 0 is used (P1-02 = 0) Motor Contactor Monitoring can be assigned to input(s) using Group 12 and selecting either 9: E-trip Mode 1 or 13: E-trip Mode 2 to the Digital Input you wish to use for the monitoring.
Caution
The Input from the motor contactor the drive drive Control terminals should be within the voltage ratings of the drive terminals (maximum input voltage 30Vdc) to avoid damage to the drive.
The following parameters are used to setup the Motor Contactor Monitoring Function.
In addition to the table below refer to the Macro tables for P1-02 to identify the Digital Input assigned to Motor Contactor Monitoring function.
Parameter Number | Parameter Name | Units | Default | Available Settings | Access | Change During Run | Scaling | Size (Bytes) | CAN Register | CAN Sub Index | Modbus Register |
|---|---|---|---|---|---|---|---|---|---|---|---|
P3-02 | Motor Contactor Monitoring Terminal Enable | N/A | 0: Off | 0: Off 1: Enabled | RW | Y | N/A | 1 | 212Eh | 0 | 302 |
P3-03 | Total Number of Motor Contactor Monitoring Errors | N/A | 0 | 0 ... 65535 | RO | N/A | N/A | 2 | 212Fh | 0 | 303 |
Sets the Motor Contactor Monitoring function to enabled or disabled.
Setting | Function |
|---|---|
0 | Off - Motor Contactor Monitoring disabled |
1 | Enabled - Motor Contactor Monitoring enabled |
Applicable Macros (P1-02) for Motor Contactor Monitoring Function:
This value increments by 1 each time there is cF-Err error.
The value can only be reset by loading factory/user defaults.
The following trip codes are used when the motor contactor is in the incorrect state. Each can be reset with the normal methods once the drive Digital Input with the Motor Contactor Monitoring function is in the correct state.
Display message | No. | Description | Corrective Action/Further information |
|---|---|---|---|
CF-Err | 96 | Motor Contactor feedback Error | Motor contactor is in wrong state as indicated by feedback signal from contactor. |