Mitsubishi Electric AJ65BT-D62 - 9.3 Latch Counter Function

MELSEC-A
9. SELECTING AND EXECUTING THE COUNTER FUNCTION
9 - 7
9.3 Latch Counter Function
This function latches the counter's present value at a time when the signal is input.
The following chart shows the relationships between the counter's present value,
counter function selection start command and latch count value storage area.
OFF
ON
150
100
50
0
0
50
100
130
0
50
100
130
1) 2) 3) 4)
OFF
ON
OFF
ON
Count enable command
{RY(n+1)4(RY(n+1)B)}
Counter function selection
start command
{RY(n+1)6(RY(n+1)D)}
Count function detection
{RX(n+1)1(RX(n+1)3)}
Latch count value storage area
{Addresses RWrn+2 to 3
(RWrn+A to B)}
150
100
50
0
Current value storage area
{Addresses RWrn+0 to 1
(RWrn+8 to 9)}
On the leading edges 1) to 4) of the counter function selection start command
{RY(n+1)6 (RY(n+1)D), F.START terminal}, the counter's present value is stored into
the latch count value storage area {addresses RWrn2 to 3 (RWrnA to B)}.
The latch counter function is executed regardless of the ON/OFF status of the count
enable command {RY(n+1)4 (RY(n+1)B)}. Also, turning on the counter function
selection start command {RY(n+1)6 (RY(n+1)D)} turns on the counter function
detection signal {RX(n+1)1(RX(n+1)3)}. Turning off the counter function selection
start command {RY(n+1)6 (RY(n+1)D)} turns off the counter function detection signal
{RX(n+1)1(RX(n+1)3)}.
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