Mitsubishi Electric WS0-CPU0 Operating Manual page 204

Chapter 9
Figure 189:
Sequence/timing diagram
for the tolerant dual channel
monitor function block —
AND mode
Figure 190:
Sequence/timing diagram
for the tolerant dual channel
monitor function block —
off-delay
201
Logic programming – Function blocks
Off-delay
Using the off-delay, briefly switching off one or both inputs can be ignored and the
Release output remains high. If one or both of the inputs is/are still switched off after
the off-delay has elapsed, then the Release output changes to low.
If the optional Off-delay timer input is used, then the off-delay is only effective if this
input is high. If the Off-delay timer input is low, then switching off one or both inputs
has an immediate effect.
The off-delay is effective in both the dual channel mode and also in the AND mode.
Input A
Input B
Off-delay timer Input
Enable output
Off-delay timer
Status input A/B
The two Status input A and Status input B outputs indicate the internal value on
the two inputs A and B. The outputs correspond to the value on the Input A and
Input B inputs with the following exceptions:
 The status output indicates the value for "Switched off", even though the related
input is switched on (with input mode = equivalent: low instead of high), as the
other input must first switch off before it is possible to switch on again (Release
output changes to high).
 The status output indicates the value for "Switched on", even though the related
input is switched off (with input mode = equivalent: high instead of low), as the off-
delay is active and switching off is currently prevented internally.
Off-delay