11
11-2
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
11.1 Module Defects
When the FM 351 starts up, that is, the power supply is switched on (“Power
on”), the FM 351 goes through a general module test (that is, RAM test and
EPROM test).
If the module is faulty and not ready, then
the FM 351 remains in a safe state,
the LED “SF” (see following Fig. 11-1) does not go out and
it is not possible to start the CPU.
It is not possible to communicate with the module using the user program
and the operating interface.
SF
CH 1
CH 2
Figure 11-1 Status and Error Indicators on the FM 351
The status and error indicators are explained in the sequence in which they
are arranged on the FM 351.
Indicator Meaning Explanation
SF (red)
LED – ON
Group error This LED indicates an error state with the FM 351.
Diagnostic interrupt (internal or external (channel) error).
See the error list in Appendix 11.2 for rectification of the error.
CH 1 (red)
CH 2 (red)
Channel error 1
Channel error 2
These LEDs indicate a channel error on channel 1 or on channel 2.
Wire breakage on encoder 1 or encoder 2.
Error, absolute encoder 1 or absolute encoder 2.
Error pulse incl. encoder 1 and encoder 2.
Operating error.
Parameterization error for parameterization from the rack SDB.
The module is defective and must be replaced.
Purpose
Effect
Status and Error
Indicators
Error Rectification
Error Handling
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