Error diagnosis
Manual BG41/BG42/BG43
5-18
Rev. 99/49
5.5 Error diagnosis
5.5.1 Errors in serial communication
••••
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The PLC goes into the operation state STOP once the data handling blocks are loaded
Reason:
The building block address (DIL switch) do not match the address of the handling blocks
(parameter ADR).
Remedial action:
=
Examine the DIL switch position.
=
By means of the programming equipment on the PLC print out the addresses used by the
interface building block with the function "PLC INFO". If values are uneven to FFh
(e.g. C0h), the building block is recognized by the SPS-CPU. If the PG reads the value Ffh on
these addresses, this implies that the building block is not properly parametized by the DIL
switches.
=
Examine the handling block’s address (parameter ADR).
Reason:
The wrong data handling block is used.
Remedial action:
=
Use the data handling block of the corresponding CPU.
••••
====
No communication is taking place
Reason:
The plug for the 25-pole SubD socket is wired wrongly.
Remedial action:
=
Examine the correctness of the interface parameter.
=
In the case of the module RS232C, examine the bridges between pin 4 and 5
=
In the case of the combination module used with the RS232C, examine the bridges between
pin 7 and 20.
=
Carry out a loopback test, where you directly reconnect the output with the input.
=
Check if RECEIVE is called.
Summary of Contents for SSM-BG41
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Page 8: ...Contents Manual BG41 BG42 BG43 iv Rev 99 49...
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Page 26: ...Firmware s memory distribution Manual BG41 BG42 BG43 2 10 Rev 99 49...
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Page 53: ...Manual BG41 BG42 BG43 Interface modules Rev 99 49 3 25 3 2 7 2 Data flow Fig 3 26 Data flow...
Page 114: ...Functional description and allocation of terminal pins Manual BG41 BG42 BG43 3 86 Rev 99 49...
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Page 215: ...Manual BG41 BG42 BG43 Software Rev 99 49 4 99 Month 06h Year 95h Weekday Tuesday 02h...
Page 222: ...Application of interfaces without data handling blocks Manual BG41 BG42 BG43 4 106 Rev 99 49...
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Page 258: ...Structure guidelines Manual BG41 BG42 BG43 5 34 Rev 99 49...
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Page 274: ...Overview cycle load Manual BG41 BG42 BG43 6 14 Rev 99 49...
Page 275: ...Appendix A List of figures A 1 B Index of tables B 1 C Index C 1...
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Page 280: ...List of figures Manual BG41 BG42 BG43 A 4 Rev 99 49...