Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual page 1066

2.
Function block with EN/ENO
The following table lists the execution conditions and operation results.
Execution condition
EN
TRUE (Executes operation)
FALSE (Stops operation)
• Timing chart
When 3 is specified in n
ON
EN
OFF
ON
(s1)
OFF OFF
(s2)
OFF
(s3)
OFF
(s4)
OFF
ON
ENO
OFF
(d1)
OFF
OFF
(d2)
(d3) 0 1
(1)
(1): When EN is on and (s1) turns on from off, (d3) is counts up.
(2): When EN is on and (s3) turns on from off, (d3) is cleared to 0.
(3): When EN is on and (s2) turns on from off, (d3) is counts down.
(4): When EN is on and (s4) turns on from off, (d3) is initialized.
Operation error
There is no operation error.
29 COUNTER FUNCTION BLOCKS
1064
29.3 Up-down Counter
Operation result
ENO
TRUE
FALSE
ON
ON ON ON ON
OFF OFF OFF OFF
ON ON
OFF OFF
ON
2 0
(2)
ON ON
ON
ON ON ON
OFF OFF OFF
ON ON
OFF OFF
ON ON
ON
1 0
(3) (4)
(d1), (d2), (d3)
Operation output value
Previous output value
ON
ON ON ON
OFF OFF
ON
3 2 1