Error and system messages
CM PtP RS232 HF (6ES7541‑1AD00‑0AB0) communication module
22
Manual, 01/2013, A5E03790665-01
Meaning of the LED displays for RUN/ERROR/(MAINT)
LED
RUN
ERROR
MAINT
Meaning
Solution
Off
Off
Off
Supply voltage not present or too low at
communication module
Check the power supply of the station.
Flashes
Off
Off
CM in startup, parameters not assigned
yet
---
On
Off
Off
CM configured and ready for operation ---
Off
Flashes
Off
Group error (at least one error pending) Evaluate the diagnostics data and
eliminate the error.
1)
1) Information on startup and diagnostics of the communication module is available in the
function manual CM PtP - Configurations for point-to-point connections
Meaning of LED displays for TXD/RXD (under the front panel)
LED
TXD
RXD
Meaning
Solution
Flashes
Off
Interface is transmitting
---
Off
Flashes
Interface is receiving
---
