Siemens SIMATIC ET 200SP Manual page 32

Interrupts/diagnostic messages
5.1 Status and error displays
Meaning of the LED displays
The following tables explain the meaning of the status and error displays. Remedial
measures for diagnostic messages can be found in the section Diagnostic messages
(Page 34).
Table 5- 1 Status and error displays DIAG
LED DIAG
Backplane bus supply of the ET 200SP not OK
Off
Technology module not configured
Flashes
Technology module configured but no module
diagnostics
On
Technology module configured and module
diagnostics (at least one error pending)
Flashes
Table 5- 2 PWR/24VDC status displays
LEDs
PWR 24VDC
Off Off
On On
On Off
32
Meaning
Meaning
Supply voltage missing
Supply voltage is present and OK
Short-circuit or overload at the encoder
supply or supply voltage too low
To correct or avoid errors
Check or switch on the supply voltage on the CPU
or on the interface module.
---
Evaluate the diagnostic messages and eliminate the
error.
To correct or avoid errors
Check the supply voltage.
•
Check the BaseUnit type and the wiring of
•
the BaseUnit.
---
Check the encoder wiring.
•
Check the loads connected to the
•
encoder supply.
Check the supply voltage.
•
Technology Module TM Count 1x24V (6ES7138‑6AA00‑0BA0)
Manual, 10/2013, A5E33002339-AA