187
Typ EP 501
Maintenance and Troubleshooting
30.1.5. Error Messages on Field Bus Devices
Display
Causes.of.error
Remedial.action
MFI fault
Field bus board defective.
Not possible, device defective.
Table 103:
Error Messages on Field Bus Devices
On.PROFIBUS:
Display
Device.status Explanation
Troubleshooting
BUS offline
is displayed approx.
every 3 seconds
Offline.
Device is not connected to the
bus.
• Check bus connection including
plug assignment
.
• Check operating voltage and bus
connection of the other nodes.
Table 104:
Error message PROFIBUS
30.2. Other faults
Problem
Possible.causes
Remedial.action
POS
= 0 (when
CMD
> 0%) or
POS
= 100%, (when
CMD
< 100%)
PV
= 0 (when
SP
> 0) or
PV
=
PV
(when
SP
>
SP
)
Sealing function (
CUTOFF
) has been unin-
tentionally activated
Deactivate sealing
function.
Applies.only.to.devices.with.binary.
output:
Binary output does not switch.
Binary output:
• Current > 100 mA
• Short-circuit
Check binary output
connection.
Applies.only.to.devices.with.
process.controller:
Device is not operating as a con-
troller, despite correctly implemented
settings.
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.
Remove
P.CONTROL
menu option from the
main menu. See chapter
“18.1.2. Deactivating
auxiliary functions”.
Table 105:
Other faults
english
