Reer Mosaic MI8 Installation And Use Manual page 130

Example of operation in the "Mandatory Gate Opening" mode
switch. Th
The status of the safety gate is monitored by the "Gate" input via the "FBK_GATE" input
block, the "Mandatory Gate opening" parameter is selected.
The guard lock used in the example continues to be locked when the electromagnet is
not energised. Therefore the "Interlock spring" option must be selected.
Figure 63 Example of operation in the Mandatory Gate Opening mode

The Guard Lock operator parameters are shown on the right. On the left there is an
example of an application diagram. The electromagnet feedback consists of two
contacts, one normally closed and one normally open. When the electromagnet is
energised the two contacts switch status. The gate feedback consists of two
normally closed contacts.
Figure 64
shows the traces relative to the operation. These are described in detail below:
(1)
(2) At this time the electromagnet is activated with a delay of "Unlock Time", after the
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 than 100ms ("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)
the gate closed condition, via the FBK_GATE signal, and sends a command to lock
130
MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC
8540780 • 23/03/2017 • Rev.31