4.3
Fault
Fieldbus Timeout
If no valid user data have been received within the time set for the fieldbus timeout parameter (
P571
Fieldbus Timeout), the set fault response (P571 Timeout Response) and a fault or warning are issued.
Depending on the set fault response the MOVITRAC
®
31.. inverter will give out three different fault
messages on the keypad display or in the MC_SHELL user interface. These fault messages only differ
in the fault number that precedes them. In all three cases the fault messages signal that no valid user
data have been received. The following table shows the fault codes signalled for the individual fault
responses.
Fault code
Programmed fault response
Remedy
87
Rapid stop with warning
Automatic restart upon receipt
of valid user data from fieldbus
87
Emergency stop with warning
87
Immediate switch-off with warning
28
Rapid stop with fault
Reset
28
Emergency stop with fault
34
Immediate switch-off with fault
87
Rapid stop with warning and switchover to standard mode
Unit off/on (mains 24V)
None
No response
Not required
Fault 87 (Warning)
Fault 87 is a warning, i.e. the fault indication is automatically cleared when the fieldbus starts again.
There is no reset required. The inverter will immediately respond again to the process data sent via
the fieldbus.
Exception: the
Standard Mode fault response (
→
Section 4.2.7).
Fault 28 (Fault)
Fault 28 is a fault, it requires a system
Reset to clear it.
This fault code is issued in connection with fault responses
Rapid Stop with Fault and Emergency
Stop with Fault. Remember to first re-activate the fieldbus system before you reset the inverter, as
otherwise a fieldbus timeout will immediately be generated again.
Fault 34 (Fault)
Fault 34 is a fault, it requires a system
Reset to clear it.
This fault code is issued in connection with the fault response
Immediate Switch-off with Fault.
Remember to first re-activate the fieldbus system before you reset the inverter, as otherwise a fieldbus
timeout will immediately be generated again.
4
Monitoring Functions
MOVITRAC
®
31.. Fieldbus Unit Profile
45
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
