Siemens AG 2001 All rights reserved 6FC5198–jAB40
3–1
SINUMERIK 840C / SIMODRIVE 611–D (DA)
3 Error Display on CPU
Errors that prevent normal operation of the PLC or the IF PLC, are displayed by a
flashing LED on the front panel of the module in question.
Error list of the PLC
LEDs for PLC Meaning (SINUMERIK 840C)
Steady light (green only)
Steady light (red only)
Steady light (red and green)
PLC cyclic mode
PLC in STOP state
OVERALL RESET necessary (initial power-up or data loss)
Light flashing (red) once
3 times
4 times
5 times
6 times
7 times
9 times
10 times
11 times
12 times
13 times
14 times
15 times
16 times
17 times
Error on cross-check sum over system program submodule
Timer 0 error (process-internal timer) or watchdog error
SW3: Module is a PLC 135 WB (can no longer be used)
Access to link RAM not possible
Error with test access to link RAM
SW1 and SW2: Error in system initialization program (synchronization
pattern)
SW3: No communication with MMC
SW3: Error when booting
1 ACOP error (group error)
IF PLC cannot be addressed from PLC
RAM of the IF PLC defective (program memory or CPU RAM)
Dual port RAM of the IF PLC defective
ADS link to the NC defective
ADS link to the IF PLC defective
ADS link (reserved); SW3 and higher: ADS link to MMC defective
ADS link (reserved)
LED for IF PLC Meaning
Steady light (green only)
Steady light (red only)
Light flashing (red) 12 times
13 times
LED off
IF PLC in cyclic operation (no error), MPC transmission running
IF PLC in the STOP state
RAM of the IF PLC defective (CPU-RAM)
Dual port RAM of the IF PLC defective
No MPC transmission, processor running
Note If the PLC 135 WB2 is used, the LEDs for the PLC and IF PLC are situated on the
PLC 135 WB2 or interface PLC module. If the PLC 135 WD is used, all the LEDs
are situated on the front panel of this module.
Error display on
the MMC CPU
Figure Meaning
0 Driver not loaded
1 Driver loaded but ADS power-up not yet performed
2 Jump ADS interface power-up
3 ADS interface power-up, MMC waits for ‘0’ from NC
3 Error Display on CPU
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