Mitsubishi Electric WS0-CPU0 Operating Manual page 187

Logic programming – Function blocks
Waiting time
The Waiting time parameter defines the time between the first rising edge of the Inch
forward or Inch backward input and the start of the Release time.
Release time
After the Waiting time has expired, the Release time begins. During the Release
time a rising edge on one of the Inch forward/Inch backward inputs will start the
machine (depending on the setting of the Direction switching parameter).
Signal time
The Signal time starts at the same time as the Waiting time. During the Signal time
the Warning output becomes High, indicating that a start sequence has been initiated.
Impulse time
The Impulse time starts at the same time as the Release time. During the impulse
time the Warning output becomes High again, indicating that the inch mode can now
be started. If during the Impulse time the inch mode is started this has no effect on
the Impulse time, i.e. the Warning output will remain High until the configured
Impulse time has expired.
The second warning signal is not mandatory and may be disabled by setting the
Note
impulse time to 0 s.
Control input
A start sequence can only be initiated if the Control input is Low. If the Control input
changes to High during a start sequence, the start sequence is aborted and another
start sequence can only be initiated after the Control input has changed to Low again.
Lock input
A start sequence can only be initiated if the Lock input is High. If the Lock input
changes to Low during a start sequence, the start sequence is aborted and another
start sequence can only be initiated after the Lock input has changed to High again.
This input can be used for safety stops.
If inch mode is active, a falling edge at the Lock input will stop inch mode and set the
function block back into Waiting for start mode.
Stop input
A start sequence can only be initiated if the Stop input is High. If the Stop input
changes to Low during a start sequence, the start sequence is aborted and another
start sequence can only be initiated after the Stop input has changed to High again.
This input can be used for safety stops.
If inch mode is active, a falling edge at the Stop input will stop inch mode and set the
function block back into Waiting for start mode.
Inch forward/Inch backward
If a rising edge (transition from Low to High) is detected on the Inch forward or on the
Inch backward input while the other input remains Low, the start sequence will begin.
Note A rising edge on both inputs or a rising edge on one of these inputs while the other
input is High is considered an invalid input state. If this occurs during a start sequence
(waiting time or release time running), these rising edges have no effect. If this occurs
during inch mode, the inch mode will be stopped and the release time starts again.
Chapter 9
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