Siemens SIMATIC ET 200SP Manual page 24

Error and system messages
Meaning of DIAG LED display
LED
DIAG
CM configured and ready for operation
On
CM in startup, parameters not assigned yet
Flashes
Error information; diagnostic interrupt (break)
Flashes
1) Information on communication module startup and diagnostics is available in the CM PtP -
Configurations for point-to-point connections
(http://support.automation.siemens.com/WW/view/en/59057093) function manual
Meaning of the TXD/RXD LED displays
LED
TX RX
Flashes Off
Off Flashes
Meaning of PWR LED display
LED
PWR
Power ON (supply voltage present)
On
Power OFF (supply voltage missing)
Off
Additional information
Information on communication module startup and diagnostics is available in the
CM PtP - Configurations for point-to-point connections
(http://support.automation.siemens.com/WW/view/en/59057093) function manual.
24
Meaning
Meaning
Interface is transmitting
Interface is receiving
Meaning
Solution
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Evaluate the diagnostics data and eliminate the
error.
1)
Solution
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Solution
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Check the voltage supply of the load group
CM PtP communication module (6ES7137-6AA00-0BA0)
Manual, 01/2013, A5E03790792-01