Safety Light Curtain
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13.3.3 Codes for Muting Errors
• The following codes are displayed until a muting cycle is initiated
• The first message to occur is always shown
Code
Description/cause
Measures
M50
Runtime error muting
Restart muting and check the sequence.
M53
Time exceeded when initiating muting
M54
Time exceeded when initiating the second
sensor pair muting
Restart muting and check the sequence.
Adjust muting (type, positioning MS,
muting signals) if necessary.
M55
1. Signal was present, but was withdrawn
without a follow-up signal.
M56
Signal sequence for initiating muting
incorrect (for linear muting with sequence
monitoring)
M57
Incorrect order when activating the muting
signals (1
st
/2
nd
signal switched)
M58
Incorrect order when activating the muting
signals (2
nd
/3
rd
signal switched)
M59
Incorrect order when activating the muting
signals (3
rd
/4
th
signal switched)
M60
Incorrect order during deactivation 1
st
signal
M61
Incorrect order during deactivation 2
nd
signal
M62
Incorrect signal sequence when ending mut-
ing (signal switches incorrectly from 0 -> 1)
M63
MUTING_ENABLE timeout
Apply Muting Enable signal for less than 300 s.
M64
MUTING_ENABLE was on 0 before the mut-
ing condition was valid.
Apply the Muting Enable signal until the muting
conditions are fulfilled.
M65
Muting timeout
• Check the muting setup.
• If necessary, adjust the muting properties (type,
positioning MS, muting signals).
M66
The safety field was occupied when muting
was deactivated.
• Check the muting setup.
• If necessary, adjust the muting properties (type,
positioning MS, muting signals).
M67
Penetration of the safety field before muting
was activated.
• Check the muting setup.
• Adjust the muting properties (type, positioning
MS, muting signals) if necessary.
M75
Change to the safety field status while belt
stop active.
Check the “belt stop” function and rule out manip-
ulation.
M76
Muting sensor signals changed while belt
stop active.
Check the “belt stop” function and rule out manip-
ulation.
M77
Belt stop timeout
Apply belt stop signal for less than 8 h.
M80
Penetration into non-blocked beam during
active partial muting.
Check the parameter configuration for partial mut-
ing and adjust if necessary.