Profibus Interface - Siemens CM 1542-5 Operating Instructions Manual

Product overview, functions

2.7 PROFIBUS interface

The following table shows the meaning of the various combinations of colors of the
RUN/STOP, ERROR and MAINT LEDs.
Table 2- 4
RUN/STOP LED
LED lit green
LED lit green
LED lit green
LED flashing
LED lit green
LED lit green
LED lit green
LED flashing
2.7 PROFIBUS interface
9-pin D-sub female connector (PROFIBUS)
The PROFIBUS connector is located behind the cover of the housing. The interface is a 9-
pin D-sub female connector operating according to the RS-485 standard.
You also have the option of connecting to optical PROFIBUS networks via an Optical Bus
Terminal OBT or an Optical Link Module OLM.
You will find the pin assignment of the D-sub socket in section Pin assignment PROFIBUS
(Page 24).
20
Meaning of the LEDs
ERROR LED
LED off LED off
LED lit red
LED lit red
LED off
LED off
green
LED flashing red
LED off
LED off
LED flashing red
green
MAINT LED
No supply voltage on the CM or supply
voltage too low.
LED off
LED test during startup
LED lit yellow
Startup (booting the CM)
LED off
CM is in RUN mode.
LED off
No disruptions
No CM configuration exists
LED off
Loading firmware
A diagnostics event has occurred.
LED off
Maintenance is demanded.
LED lit yellow
Maintenance is required.
LED flashing
yellow
Module fault
LED flashing
yellow
Operating Instructions, 11/2018, C79000-G8976-C290-04
Meaning
CM 1542-5