GUARD LOCK (max. 16)
GUARD LOCK
Using the GUARD LOCK operator the lock-
ing/release of an ELECTROMECHANICAL
GUARD LOCK is monitored. For this purpose
it is checked whether the locking command
and the status of an INTERLOCK and
FEEDBACK match. The main output (OUTPUT)
is "1" (TRUE) if the guard lock is closed and
locked.
Principle of operation.
The function operates as guard lock monitoring.
1) The GATE input must always be connected to a guard lock input of type INTERLOCK
(feedback from the door).
2) The Lock_fbk input must always be connected to an input element of type LOCK
FEEDBACK (feedback from the lock).
3) The UnLock_cmd input can be connected as required in the diagram and represents
the unlock request (if logical "1").
4) The OUTPUT output on this element is "1" (TRUE), if the guard lock is closed and
locked. If there is an unlock command present on the UnLock_cmd input, the
OUTPUT signal is set to "0" and the locking (LockOut output signal) is removed after
the time set in the „Unlock time“. The OUTPUT signal is set to "0" ("FALSE") if an erro-
neous state is present (e.g. door open when locked; feedback loop timeout elapsed;
...).
5) The LockOut signal controls the locking of the safety door.
Parameters
Unlock time: The time that elapses between the activation of the Unlock_cmd input and
the actual release of the locking.
.
- 0 ms to 1 s – 100 ms step
- 1.5 s to 10 s – 0.5 s step
- 15 s to 25 s – 5 s step
Feedback Time: Maximum time delay between the LockOut output and the Lock_fbk in-
put (as stated in the data sheet for the guard lock, with required delay).
- 10 ms to 100 s – 10 ms step size
- 150 ms to 1 s – 50 ms step size
- 1.5 s to 3 s – 0.5 s step size
Interlock Spring: The guard lock is locked passively and released actively, i.e. it is locked
by the mechanical force in the spring. The guard lock therefore remains locked after in-
terruption of the power supply.
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