Filter
Top Products
6 - 7 6 - 7
MELSEC-Q
6 CONVENIENT USAGE
6.5 Using the Periodic Pulse Counter Function
This function stores the present and the previous values of the counter to CH
Periodic pulse count present value (Un\G18, Un\G19, Un\G50, Un\G51) and CH
Periodic pulse count previous value (Un\G16, Un\G17, Un\G48, Un\G49), respectively,
at the preset cycle (T).
The relationships between the signals, buffer memory, etc. in the periodic pulse
counter function are illustrated below.
0
100
200
ON
OFF
ON
OFF
0
100
200
1)
0
2)
200
3)
20
4)
100
5)
80
6)
TTTTT
1)
0
2)
200
3)
20
4)
100
5)
80
0
100
200
2)
0
3)
200
4)
20
5)
100
1
0
7)
CH Count enable command
(Y4, YC)
CH Present value
(Un\G2, Un\G3, Un\G34, Un\G35)
CH Counter function selection start
command (Y6, YE)
Counter function selection start command
(function start input)
CH Periodic pulse count present value
(Un\G18, Un\G19, Un\G50, Un\G51)
CH Periodic pulse count previous value
(Un\G16, Un\G17, Un\G48, Un\G49)
CH Sampling/periodic counter flag
(Un\G11, Un\G43)