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Pulse Train Input Function - Mitsubishi Electric A800 Programming Manual

800 series, plc function.
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1.13

Pulse train input function

Pulse train input values from terminal JOG can be read with the PLC function.
To read pulse train input values with the PLC function, set the terminal JOG by setting Pr.291 Pulse train I/O selection = "1,
11, 21, or 100" and Pr.384 Input pulse division scaling factor = "0 (initial value)".
After setting terminal JOG, set SD1240 to "1" to start counting the number of sampling pulses and accumulated count values.
Pulse train (the number of sampling pulses) from terminal JOG is stored to SD1236.
When the sampling pulses overflow, make adjustment with the setting of Pr. 416 and Pr. 417.
The number of sampling pulses
= the number of input pulses per count cycle  pre-scale setting value (
Parameter
Name
291
Pulse train I/O selection
416
Pre-scale function selection
417
Pre-scale setting value

The settings of "10, 11, 20, 21, and 100" are available only for the FM type.
Device
number
SD1236
Pulse train input sampling pulse
SD1237
Pulse train input cumulative count value L
SD1238
Pulse train input cumulative count value H
SD1239
Reset request of pulse train input count
SD1240
Count start of the pulse train input
Initial
Setting range
value
0, 10, 20
0
1, 11, 21, 100

0
0 to 5
1
0 to 32767
Name
Setting range
0 to 32767
0 to 99999999
0
1
0
1
Pulse train input function
)  increments scaling factor (
Pr. 417
Description
Terminal JOG

Pulse train input
Pre-scale function selection
(increments scaling factor)
0: No function
1: 1
2: 0.1
3: 0.01
4: 0.001
5: 0.0001
Set the pre-scale value to calculate the number of
sampling pulse when inputting the pulse train.
Description
The number of pulses counted in count cycle is
stored.
The cumulative value of the number of
sampling pulses is stored.
Not clear
Count clear
Stop counting
Start counting
)
Pr. 416
51
PLC Function
1

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