Event Counter (Up, Down And Up And Down) - Mitsubishi Electric WS0-CPU0 Operating Manual

Table 39:
Parameters of the Clock
generator function block
Note
Figure 110:
Timing diagram for the
Clock generator function
block
Figure 111:
Function block diagram for
the Event counter (Up and
down) function block
Table 40:
Parameter for the Event
counter function blocks
Logic programming – Function blocks
Parameters of the function block
Parameter
Stopping mode
Clock period (cycle duration)
Pulse time
If the logic execution time of the configuration changes (e.g. through addition or
subtraction of function blocks), the clock period and the pulse time will change.
Sequence/timing diagram
9.7.11

Event counter (Up, Down and Up and down)

Function block diagram
General description
The Event counter function blocks allow to count events, either upward and/or
downward. When a pre-defined overflow value is reached, this will be indicated on the
Overflow output or, when zero is reached, this will be indicated on the Underflow
output. Depending on the required counting direction there are the function blocks
Event counter (Up), Event counter (Down) and Event counter (Up and down).
Parameters of the function block
Parameter
Counter reset
Counter reload
Overflow limit
Reload value
Min. restart pulse time
Min. reload pulse time
Possible values
 Immediately
 After last clock
2 to 65535
Duration = Parameter value × Logic execution time
1 to 65534
Duration = Parameter value × Logic execution time
The pulse time has to be lower than the clock period.
Possible values
 Manual
 Automatic
 Manual
 Automatic
Integer between 1 and 65,535. The overflow value limit has to
be higher than or equal to the reload value.
Integer between 1 and 65,535
 100 ms
 350 ms
 100 ms
 350 ms
Chapter 9
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