MELSEC-A
9. SELECTING AND EXECUTING THE COUNTER FUNCTION
9 - 10
9.5 Periodic Pulse Counter Function
This function stores the present and previous counter values in the corresponding
periodic pulse count present and previous value storage areas at preset intervals (T).
The unit of frequency is 10 ms and the precision is less than 1 count.
The following chart shows the relationships between the signals, remote registers and
others.
OFF
ON
200
20
100
50
5)
4)
3)
2)
0
1)
6)
200
100
0
T
T
T
T
T
0
0
200
20
100
50
100
20
200
0
1)
2)
2)
3)
3)
4)
4)
5)
5)
7)
300
200
100
0
Count enable command
{RY(n+1)4(RY(n+1)B)}
OFF
ON
Counter function selection
start command
{RY(n+1)6(RY(n+1)D)}
OFF
ON
Counter function deteciton
{RX(n+1)1(RX(n+1)3)}
Sampling/interval time
setting area
{Address RWwm+5
(RWwm+D)}
Periodic pulse count present
value storage area
{Addresses RWrn+4 to 5
(RWrn+C to D)}
Periodic pulse count previous
value storage area
{Addresses RWrn+2 to 3
(RWrn+A to B)}
Sampling/periodic counter flag
storage area
{Address RWrn+6}
300
200
100
0
Current value storage area
{Addresses RWrn+0 to 1
(RWrn+8 to 9)}
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Summary of Contents for AJ65BT-D62
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