Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1985

■Operation result
1.
Function block without EN/ENO
The operation processing is performed. The operation result is output from (d1) and (d2).
• Timing chart
When (n)=3
ON ON
(s1)
OFF OFF
ON
(s2)
OFF OFF
ON
(d1)
OFF
(d2) 0 3
(1) (2)
(1) When (s2) turns on, the value in (d2) is initialized.
(2) When (s1) turns on, the value in (d2) is counted down.
2.
Function block with EN/ENO
The execution conditions and operation results will be as follows.
Execution condition
EN
TRUE (executed)
FALSE (not executed)
• Timing chart
When (n)=3
ON ON
EN
OFF
ON ON
(s1)
OFF OFF
ON
(s2)
OFF OFF
ENO
OFF
ON
(d1)
OFF
0 3
(d2)
(1)
(1) When (s2) turns on while EN is on, the value in (d2) is initialized.
(2) When (s1) turns on while EN is on, the value in (d2) is counted down.
Operation error
There is no operation error.
ON ON
OFF OFF OFF
ON
2 1
Operation result
ENO
TRUE
FALSE
ON ON ON
ON ON
OFF OFF OFF
ON
2 1
(2)
ON ON
OFF OFF
ON
OFF
OFF
0 3
(d1), (d2)
Operation result output value
Previous output value
ON ON
ON ON ON
OFF OFF OFF
ON
OFF
OFF
0
36 COUNTER/TIMER FUNCTION BLOCKS
ON
OFF
2 1
ON
ON
OFF
3 2
36.2 Down Counter
36
1983