Getting Started
2-11
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
2.10 Diagnostics
1. If a fault occurs, the OB 82 is started. Evaluate the start information in the
OB 82.
Tip: Call SFC 13 within OB 82 and evaluate the diagnostic frame. (See
Section 6.3)
SM 321: Short Circuit of Sensor Power Supply to M
1. Open the front door of the DI module and use a wire to short-circuit the sensor
power supply Vs (terminal 10) to M (terminal 20).
2. Watch the status LEDs.
IM 153-2:
– SF: lights up
SM 321; DI 16 x 24 V DC:
– SF: lights up ⇒ Diagnostic message has been issued
– Vs: does not light up (terminal 10)
3. Evaluate the diagnostic message.
Result:
– Station status 1: Byte x.3 is set ⇒ External
diagnostics
– Module diagnosis: Byte (x+7).3 is set ⇒ Slot 4
– Channel-specific diagnosis:
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 diagnostic LEDs 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 erased.
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