SICK MOC3ZA Notice D'instructions page 70

en
Chapter 8
70
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
Fault diagnosis
Error Indication of the
LEDs
The device enables the PWR  Green
outputs even though the
OUT  Green
motor is running.
ERR  Off
The device enables the PWR  Green
outputs too early (motor is
OUT  Green
not yet fully at standstill).
ERR  Off
The device does not enable PWR  Off
the outputs even though the
motor is fully at a standstill.
PWR  Green
The device does not enable
the outputs even though the
ERR  Red
motor is fully at a standstill.
with code 1
The device does not enable PWR  Green
the outputs even though the
or
motor is fully at a standstill.
OUT
 Green/yellow
PWR  Green
The device does not enable
the outputs even though the
OUT  Off
motor is fully at a standstill.
ERR  Red
with code 2 or 3
The device does not enable PWR  Green
the outputs even though the
OUT  Off
motor is fully at a standstill.
ERR  Red
with code 4
The device does not enable PWR  Green
the outputs even though the
OUT  Off
motor is fully at a standstill.
ERR  Red
with code 5
The device does not enable PWR  Green
the outputs even though the
OUT  Yellow
motor is fully at a standstill.
ERR  Off
Operating instructions
Rectification of the error
➢ Reduce the voltage threshold U
minimum value.
➢ Check the wiring of the measurement inputs.
➢ Reduce the voltage threshold U
➢ If necessary increase the standstill time t
time to enable).
Undervoltage error or internal device error
➢ Disconnect the supply voltage to the MOC3ZA for at
least 3 seconds.
➢ Replace the device if the problem persists.
Undervoltage error
➢ Check the supply voltage.
Standstill has been detected, but the delay time t
not elapsed yet.
➢ Wait until t has elapsed.
s
If the outputs are not enabled after 6 s at the latest,
then the measurement inputs L1/L2/L3 are probably
occasionally detecting voltage spikes greater than the
U set. These voltage spikes can be detected by the
an
OUT LED flashing  Green/yellow (i.e. illuminated
green and flashing yellow sporadically).
➢ In this case set U higher.
an
➢ Rectify the interference on the measurement inputs
(possibly use screened cable).
A previous wire break or offset error on L2 or L3 is still
saved (there is no jumper fitted to terminals S2/X1).
➢ Fit a jumper to terminals S2/X1 (disable error
storage).
See also section 8.3.2 "Wire break/offset" on page 68.
The external device monitoring (EDM, contacts S1/X1)
is not closed or a previous EDM error is still saved (no
jumper fitted to terminals S2/X1).
➢ Close the external device monitoring (EDM).
➢ Fit a jumper to terminals S2/X1 (disable error
storage).
See also section 8.3.3 "EDM error" on page 68.
Simultaneity error on measured signals on L2 and L3.
How to reset the error:
➢ Disconnect the supply voltage to the MOC3ZA for at
least 3 seconds.
➢ The simultaneity error will be automatically reset
when the motor starts again (both measurement
inputs L2 and L3 simultaneously receive measured
signals greater than U ).
an
If the simultaneity error is still present:
➢ Check the wiring of the measurement inputs
L1/L2/L3.
See also section 8.3.4 "Simultaneity of the measured
signals" on page 69.
The voltage on the measurement inputs is greater than
the voltage threshold U set. If the ERR LED continues
an
to remain off after waiting 8 s, the problem is probably
interference or residual voltage (coupled AC) on the
measurement inputs.
➢ Increase the voltage threshold U
If the error is still present or if it is undesirable to
increase U :
an
➢ Reduce the coupling of interference onto the cables
on the measurement inputs L1/L2/L3, e.g. using
screening, by shortening the cables or laying them
separately.
➢ For this purpose carry out the following test: If you
short circuit the terminals L1/L2/L3 with no power
applied to the motor, the OUT LED must extinguish.
8014608/1DS0/2022-02-16
Subject to change without notice
MOC3ZA
if necessary to the
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(delay
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has
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