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Safety function blocks
420
02/16 MN05013001Z EN
Contacts
The LM..QS contact enables hazardous movement in the
safety circuit diagram. It closes if the hazardous area is not
interrupted and stays closed while muting is correctly acti-
vated.
The signal contact LM.:QM likewise indicates the muting
operation in the safety circuit diagram. The safety function is
suspended by muting and is monitored by the muting
sensors. The signal contact closes in order to indicate muting
operation, i.e. that the safety function has been removed.
If the LM..ER contact is wired in the standard and/or safety
circuit diagram, it indicates the presence of an error by
closing.
Memory requirement
The LM function block requires 56 bytes of memory.
Operation of the function block
Access is generally controlled by an ESPE device (
e
lectro-
s
ensitive
p
rotective
e
quipment) which consists of light
barriers, light grids and light curtains.
The ESPE triggers a switchoff command when there is an
intervention in the hazardous area, the channel coils LM..I1
and LM..I2 drop out. The enable contact LM..QS opens and
the hazardous movement can be stopped.
Contact
Function
LM..QS
Enable (contact closed -> light curtain not trig-
gered)
LM..QM
Muting: The safety function is suspended by
muting
LM..ER
Error message (contact closed -> Error)
Содержание easySafety
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