Siemens SIMATIC ET 200M Operating Instructions Manual page 32

Brief instructions on commissioning
2.1 Commissioning on PROFIBUS DP
2.1.8 Evaluating diagnostic messages:
Introduction
In this example, you generate diagnostic messages by provoking errors in the ET 200M. In
the event of an error, OB82 is started. Evaluate the start information in the OB 82.
Tip: Call SFC 13 within OB 82 and evaluate the diagnostic frame.
SM 321: Short-circuit to M at encoder supply
1. Open the front panel of the DI-module and use a wire to short circuit the encoder supply
2. Note the status LEDs.
3. Evaluate the diagnostic message.
4. Remove the wire between terminal 10 and terminal 20.
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Vs (terminal 10) after M (terminal 20).
IM 153-2:
– SF: ON
SM 321; DI 16 x 24 V DC:
– SF: lights up → a diagnostic message is pending
– Vs: does not light up (terminal 10)
Result:
– Station status 1 Byte x.3 is set → external diagnostics
– Identifier-related diagnostics: Byte (x+7).3 is set → Slot 4
– Channel-related diagnostics:
Byte (x+16).0 to (x+16).5: 000011
Byte (x+17).0 to (x+17).5: not relevant
Byte (x+18).0 to (x+18).4: 00001
Evaluate the diagnosis LEDs once again.
IM 153-2:
– SF: off
SM 321; DI 16 x 24 V DC:
– SF: off
– Vs: lights up (terminal 10)
The diagnostic message is deleted.
→ Slot 4
B
→ Short circuit
B
Operating Instructions, 12/2008, EWA-4NEB780600602-08
ET 200M