Troubleshooting
8.3 Troubleshooting with the BOP
Control Units CU240S
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Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
8.3
Troubleshooting with the BOP
Diagnostics using alarm and fault numbers
The BOP must be fitted to the Control Unit. If an alarm or fault condition occurs, the BOP
displays appropriate alarm or fault number.
If an alarm occurs the alarm number is displayed and the inverter will continue to run,
although it is possible that it may run in an unexpected manner depending upon the alarm
condition.
If a fault occurs, the fault number is displayed and the inverter is stopped.
If a line supply failure interrupts commissioning, then inconsistencies can occur regarding the
parameterization. In this case, it is important that the commissioning is re-started with a
factory reset to establish the original factory settings.
Table 8-1
Alarm and fault numbers, cause and remedy
Alarm
Number
Meaning
Cause
The parameter or configuring settings by the PROFIBUS master are invalid.
A0700
Remedy Correct the PROFIBUS configuration
Cause
The link to the PROFIBUS is interrupted.
A0702
Remedy Check connector, cable and PROFIBUS master.
Cause
No setpoints or invalid setpoints (control word = 0) are being received from the
PROFIBUS master.
A0703
Remedy Check setpoints from the PROFIBUS master. Switch SIMATIC CPU to "RUN".
Cause
At least one configured internode transmitter is not yet active, or has failed.
A0704
Remedy Activate internode transmitter.
Cause
No actual values received from inverter.
A0705
Remedy None (fault is with the inverter).
Cause
PROFIBUS DP software error.
A0706
Remedy None diagnostic parameter r2041.
Cause
Inverter has detected failure of PROFIBUS communications link.
A0710
Remedy Communication interface on Control Unit may be broken.
Cause
Invalid value of PROFIBUS parameter.
A0711
Remedy Check P0918 address and P2041.
Cause
No communication via PROFIBUS. Triggered by A0702, A0703 and A0704.
The telegram failure time set in P2040 has run out. Details see section "Faults
and Alarms" in the Parameter List.
F0070
Remedy Check connection of the communication devices and ensure that a valid control
word is being used.
