Input Pulse Measurement Instruction - Panasonic FP0R User Manual

Input pulse measurement instruction (F178)
This instruction is used to measure the pulse number and cycle of a specified high-speed counter
-
channel when using the high-speed counter function.
The pulse number to be measured is counted in a specified counting cycle.
-
The one pulse (on-off cycle) right after the execution of the instruction is measured as the pulse cycle.
-
Note) The last numbers of the actual measured values may vary due to the measurement error.
Operation of F178 instruction (In case of the above sample program)
Example) When a single pulse of 250Hz was measured repeatedly
Pulse number measured within 100 ms: 25 (Error±1) is stored in DT200 and DT201.
Pulse cycle: 1/250 x 10
Pulse cycle: 1/250 x 10
6
= 4000 (Error±1) is stored in DT202 and DT203.
3
= 4 (Error±1) is stored in DT204 and DT205.
Setting conditions:
Channel No.: 0
-
Storage location of measured pulse number:
-
DT200 to DT201
No. of moving average of measured pulse number:
-
Once
Measurement cycle of measured pulse number:
-
100ms
Pulse cycle measurement by 1µs and 1 ms
-
Storage location of measured pulse cycle (1 µs
-
unit): DT202 to DT203
Storage location of measured pulse cycle (1 ms
-
unit): DT204 to DT205
Measurement limit of measured pulse cycle (1ms
-
unit): 2s
8-15