Siemens SIMATIC ET 200SP Manual page 76

Meaning of the LED displays
The following tables explain the meaning of the status and error displays. Remedial
measures for diagnostic alarms can be found in section Diagnostic messages (Page 77).
Table 5- 1 Status and error displays DIAG
LED DIAG
Backplane bus supply of the ET 200SP not OK
Off
Technology module parameters not set
Flashes
Technology module parameters set and no module
diagnostics
On
Technology module parameters set and module
diagnostics (at least one error is present)
Flashes
Table 5- 2 PWR/24VDC status displays
LEDs
PWR 24VDC
Off Off
On On
On Off
TM Count 1x24V (6ES7138‑6AA01‑0BA0) technology module
Manual, 07/2019, A5E33002339-AD
Meaning
Meaning
Supply voltage missing
Supply voltage is present and OK. Encoder
supply is OK.
Short-circuit or overload at the encoder
supply
Interrupts/diagnostic messages
5.1 Status and error display
Remedy
Check or switch on the supply voltage on the CPU
or on the interface module.
---
Evaluate the diagnostic alarms and eliminate the
error.
Remedy
Check the supply voltage.
•
Check the BaseUnit type and the wiring of
•
the BaseUnit.
---
Check the encoder wiring.
•
Check the loads connected to the encod-
•
er supply.
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