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6. Configuration
6. 4. Communication faults
A Modbus fault is triggered if the Modbus card does not receive any Modbus requests at its address within a predefined time period (time
out). All Modbus request types are taken into account (read, write, etc.). The time out is fixed at 10 s (non-modifiable).
The response of the drive in the event of a Modbus communication fault can be configured.
The values of the [Network fault mgt] (CLL) parameter, which trigger a [Com. network] (CnF) drive fault, are:
The values of the [Network fault mgt] (CLL) parameter, which do not trigger a drive fault, are:
The fallback speed can be configured via the [Fallback speed]
(LFF) parameter in the [1.8 – FAULT MANAGEMENT] (FLt-) menu.
Configuration can be performed using the graphic display terminal or
integrated display terminal using the [Network fault mgt] (CLL)
parameter in the [1.8 FAULT MANAGEMENT] (FLt-) menu, [COM.
FAULT MANAGEMENT] (CLL-) submenu.
RDY NET +0.00Hz 0A
COM. FAULT MANAGEMENT
Network fault mgt : Freewheel
CANopen fault mgt : Freewheel
Modbus fault mgt : Freewheel
Code Quick
Value Meaning
[Freewheel] (YES) Freewheel stop (factory setting)
[Ramp stop] (rMP) Stop on ramp
[Fast stop] (FSt) Fast stop
[DC injection]
(dCI) DC injection stop
Value Meaning
[Ignore] (nO) Fault ignored
[Per STT] (Stt) Stop according to configuration of [Type of stop]
(Stt).
[fallback spd] (LFF) Switch to fallback speed, maintained as long as the fault is present and the run command is not disabled.
[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.