Programmable Safety Controller SCR P
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Reference Signals
In the figure below, reference signal A3 is on page 1 of the function block diagram and the A3 AND
block is on page 2. The output node on the A3 AND block can also be used on page 2 for other
safety control logic.
Reference signal A3 on page 1
AND logic block A3 on page 2
Figure 53: Latch Reset and Referenced Safety Output and AND block
Latch Reset
Mute Function
M0:OS1
M0:MR1
M0:MSP1
M0:RO1
When a safeguarding device OS1 transitions to a Stop state in a valid muting cycle, the
latch reset function block will latch and require a reset signal to keep SO1 on after
muting ends.
If OS1 switches to the Stop state in a valid muting cycle and no reset signal is seen,
RO1 turns off after muting ends.
Figure 54: Timing Diagram
—Latch Reset Block and Muting Block