Siemens CU240S DP Operations Instructions Page 103

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Troubleshooting/FAQs
Control Units CU240S
Operating Instructions (Compact), 04/2006, A5E00766042B AA
5-3
Diagnostics using alarm numbers
If a Basic Operator Panel (BOP) is fitted to the Control Unit and a alarm or fault condition
occurs, the BOP will display the appropriate alarm or fault number.
If an alarm occurs, the alarm number will be 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 will be displayed and normally the inverter will be stopped.
Table 5-1 Alarm 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 Alarns" in the Parameter List.
F0070
Remedy Check connection of the communication devices and ensure that a
valid control word is being used.
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