Communication monitoring
Behavior in the event of a network fault
In the event of a network fault (on a monitored channel), the drive reacts as specified in the [1.8 - FAULT MANAGEMENT]
•[Modbus fault mgt] (SLL) for integrated Modbus
•[CANopen fault mgt] (COL) for CANopen
•[Network fault mgt] (CLL) for a network card
The Modbus TCP/IP Ethernet card can also trigger an external fault (in the event of an FDR fault or IP address duplication fault), to which the drive reacts as specified in the [1.8 - FAULT MANAGEMENT]
The drive can react in five possible ways:
1.Drive fault
[Freewheel] (YES): Freewheel stop (factory setting)
[Ramp stop] (rMP): Stop on ramp
[Fast stop] (FSt): Fast stop
[DC injection] (dCI): DC injection stop
The fault displayed will depend on the source of the communication fault.
•[Modbus com.] (SLF1) for integrated Modbus
•[CANopen com.] (COF) for CANopen
•[Com. network] (CnF) for a network card
•[External fault com.] (EPF2) for Ethernet card FDR and IP faults
The CiA402 state chart changes to "7 - Fault reaction active" and then to "8 - fault".
2.Stop without fault
[Per STT] (Stt): Stop according to configuration of [Type of stop] (Stt).
There is no drive fault.
If the CiA402 state chart is in "5 - Operation enabled", it changes to "4 - Switched on" after stopping.
3.Ignore fault
[Ignore] (nO): | Fault ignored |
4.Speed maintenance
[Spd maint.] (rLS): The drive maintains the speed at the time the fault occurred, as long as the fault persists and the run command has not been removed.
There is no drive fault.
If the CiA402 state chart is in "5 - Operation enabled", it remains there.
5.Fallback speed
[Fallback spd] (LFF): Change to fallback speed, maintained as long as the fault persists and the run command has not been removed.
There is no drive fault.
If the CiA402 state chart is in "5 - Operation enabled", it remains there.
The fallback speed can be configured in the [1.8 - FAULT MANAGEMENT]
Note: The drive will not start up immediately at the fallback speed. If there is a loss of communication, the drive will only run at the fallback speed if the run command was present when the communication fault occurred.
In the event of a control system being used to ensure switchover to an active safe state if there is a loss of communication, drives that have been stopped must always be left in the run state (5 - Operation enabled) with zero reference to ensure that they change to the fallback speed.
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