Brief instructions on commissioning
2.1 Commissioning on PROFIBUS DP
ET 200M
30 Operating Instructions, 12/2008, EWA-4NEB780600602-08
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
Vs (terminal 10) after M (terminal 20).
2. Note the status LEDs.
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)
3. Evaluate the diagnostic message.
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
B
→ Slot 4
Byte (x+17).0 to (x+17).5: not relevant
Byte (x+18).0 to (x+18).4: 00001
B
→ Short circuit
4. Remove the wire between terminal 10 and terminal 20.
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.
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