Internal Errors; Wire Break/Offset; Edm Error - SICK MOC3ZA Notice D'instructions

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Chapter 8
68
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Fault diagnosis
8.3.1

Internal errors

Internal errors are saved independent of the wiring of input S2 (EDM), the output circuit is
switched off immediately and the semiconductor output ERR is switched on. The ERR LED
illuminates  Red and the PWR LED changes color from  Green to  Red.
Examples of the internal device errors detected are:
 Error on the safety output relay (e.g. welded contacts)
 Internal error on the measurement channels and the sampling
 Internal error on the operation of the safety-related output relay
 Error on the rotary switches for U
8.3.2

Wire break/offset

The cables for the measurement inputs L1/L2/L3 to the motor are continuously monitored
for wire break and for a DC offset greater than U
In case of a wire break or offset error, the output circuit is immediately switched off and
the OUT LED illuminates  Yellow.
In addition, an error message is output with a delay (in case of a wire break after 2 s, in
case of an offset error after 8 s): The semiconductor output ERR switches on and the ERR
LED flashes  Red with the error code 2 or 3, depending on whether the open circuit or
the offset has occurred between L1 and L2 or between L1 and L3.
The error message for wire break/offset can either be saved or automatically reset after
error rectification (see section 8.3.5 "Error storage and deletion" on page 69).
8.3.3

EDM error

The error message "EDM" occurs if there is no connection between the terminals S1 and
X1 with the output circuit not enabled: The semiconductor output ERR is switched on and
the ERR LED flashes  Red with error code 4.
Even if both measurement inputs then have signals < U
from the missing connection between S1 and X1, the "EDM" error is retained and the
output circuit is not enabled.
If the connection between S1 and X1 (EDM) is now closed and the storage of the external
errors is not activated, the output circuit is enabled.
The error message for an EDM error can either be saved or automatically reset after error
rectification (see section 8.3.5 "Error storage and deletion" on page 69).
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Operating instructions
MOC3ZA
8014608/1DS0/2022-02-16
Subject to change without notice