Service and maintenance
7.7 Troubleshooting with the PROFIBUS DP
Control Units CU240S
7-10 Operating Instructions, 11/2006, A5E00766042B AA
Table 7-2 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.
Identification of the communications components
The read-only parameter r2053 shows the information by which the various firmware
components of the PROFIBUS DP interface can be identified.
Table 7-3 Identification of communications firmware
Parameter Meaning
0: Inverter cannot identify the communications interface
1: PROFIBUS DP detected
2: Not assigned
r2053.00
56: Undefined communications error
r2053.01 Firmware version
r2053.02 Constant "0"
r2053.03 Firmware date (year)
r2053.04 Firmware date (day and month)
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