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Section 5 Functions and Operations
■ F5: Measuring Length
Input A
Input B
Hold
Measurement value
5-20
Measuring workpiece length
• Basic operation
Displays the number of input A pulses while input B is ON.
The measurement value can be obtained using the following
formula:
D = C × α
C: Number of pulses of input A while input B is ON
α: Prescale value A
D: Measured length
C
C
1
2
Measuring period
Measuring period
T
R
Not valid
× α
No measurement
C
1
*TR: Recovery Time
The time required from the end of one measurement until completing
preparations for the next measurement. Allow at least 1 ms.
Referring to the following table, specify the prescale value
corresponding to the desired display unit
Calculated value
Measured length
Na: Number of input A pulses per rotation
πda: Circumferential length (m) of Input A per rotation
A
Encoder
BCD
Operation Configuration (Application)
C
C
3
4
Measuring period
Measuring period
× α
C
2
.
Display unit
mm
cm
m
To PLC
× α
C
4
Prescale value
(α)
1000 πda/Na
100 πda/Na
πda/Na
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