Reer MZERO Installation, Use And Maintenance Manual page 78

Figure 36
shows the traces relative to the operation. These are described in detail below:
(1) At this time the user requests to unlock the guard lock. The "COMMAND" signal switches
from LL0 to LL1, and the "OUTPUT1" signal switches from LL1 to LL0.
(2) At this time the electromagnet is activated with a delay of "Unlock Time", after the
command is sent. This delay has been set to 0.5 seconds. The "ACTIV." signal switches from
LL0 to LL1.
(3) At this time the electromagnet is actually activated, 95ms after the command was sent.
This delay is due to the technical characteristics of the electromagnet. In any case, 95ms is
less than100ms ("Feedback Time") and so no errors have occurred.
(4) At this time the guard lock is unlocked and the user opens the gate, the FBK_GATE signal
switches from LL1 to LL0.
(5) At this time the user closes the gate and the FBK_GATE signal thus switches from LL0 to
LL1.
(6) At this time the user releases the unlock gate command. The "Guard Lock" detects the gate
closed condition, via the FBK_GATE signal, and sends a command to lock the guard lock.
The "ACTIV." signal switches from LL1 to LL0.
(7) At this time the electromagnet is actually deactivated, approx. 95ms after the command
was sent due to the technical characteristics of the device. The guard lock is now locked.
(8) As soon as the "Guard Lock" operator detects that the guard lock is locked and the gate is
closed, the "OUTPUT1" signal switches to LL1.
Figure 36 - Traces relative to "Guard Lock" block operation in the with gate mode.
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STAND ALONE PROGRAMMABLE SAFETY CONTROLLER
8541403 • 19/07/2021 • Rev.1