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Typ EP 501
Maintenance and Troubleshooting
30.1.5. Error Messages on Field Bus Devices
Display
MFI fault
Table 103:
Error Messages on Field Bus Devices
On.PROFIBUS:
Display
BUS offline
is displayed approx.
every 3 seconds
Table 104:
Error message PROFIBUS
30.2.
Other faults
Problem
POS = 0 (when CMD > 0%) or
POS = 100%, (when CMD < 100%)
PV = 0 (when SP > 0) or
PV = PV (when SP > SP )
Applies.only.to.devices.with.binary.
output:
Binary output does not switch.
Applies.only.to.devices.with.
process.controller:
Device is not operating as a con-
troller, despite correctly implemented
settings.
Table 105:
Other faults
Causes.of.error
Field bus board defective.
Device.status Explanation
Device is not connected to the
bus.
Offline.
Possible.causes
Sealing function (CUTOFF) has been unin-
tentionally activated
Binary output:
• Current > 100 mA
• Short-circuit
P.CONTROL menu option is in the main
menu. The device is therefore operating as
a process controller and expects a process
actual value at the corresponding input.
Remedial.action
Not possible, device defective.
Troubleshooting
• Check bus connection including
plug
assignment.
• Check operating voltage and bus
connection of the other nodes.
Remedial.action
Deactivate sealing
function.
Check binary output
connection.
Remove P.CONTROL
menu option from the
main menu. See chapter
"18.1.2. Deactivating
auxiliary functions".
english
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