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10 BLOCK LINK EXAMPLES
10.9 Pulse Measurement
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Multi function counter block detail window
*1 Set the following to measure the OFF width.
Detector of Input_Signal_Event linked with the RUN terminal: ON only in A: Fall
Detector of Input_Signal_Event linked with the STOP terminal: ON only in A: Rise
Detector of Latch_Event linked with the Latch terminal: ON only in A: Rise
The items other than the above need not to be set.
Block
Variable name
Setting value
Description
Input 0
Latch 0
Input_Signal_Event
Detector Select
User Setting (ON only in A: Rise)
Set "Only A: Rise is on".
Detector Select
User Setting (ON only in A: Fall)
Set "ON only in A: Fall".
Latch_Event
Detector Select
User Setting (ON only in A: Fall)
Set "ON only in A: Fall".
Counter_Timer_0
Count Enable
ON
Set this parameter to "ON".
Count Mode
Linear
Set this parameter to "Linear".
Upper Limit
4294967295
Set "4294967295", to widen the pulse measurement width.
Lower Limit
0
Set "0".
Clock
25ns
Set this parameter to "25ns". (to prevent input pulses from
missing)
Add Mode
OFF
Set the addition mode to "OFF". (No addition in this example)
Add Value
0
STOP
→
PRESET
ON
Set this parameter to "ON", to perform a preset when a stop
event occurs.
Preset Value
0
Set this parameter to 0.
Latch Value
(User Address)
1000
Assign a buffer memory address.
Summary of Contents for MELSEC-L Series LD40PD01
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