Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1975

Processing details
■Operation processing
• When (s1) turns on, (d) is set. Turning on (s2) while (s1) is off resets (d).
• Even when (s2) turns on while (s1) is on, (d) is not reset.
■Operation result
1.
Function block without EN/ENO
The operation processing is performed. The operation result is output from (d).
• Timing chart
ON ON
(s1)
OFF OFF
ON
(s2)
OFF
ON ON
(d)
OFF OFF
(1) (2)
(1) When (s1) turns on, (d) turns on.
(2) When (s2) turns on while (s1) is off, (d) turns off.
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
ON
EN
ON ON
(s1)
OFF OFF
(s2)
OFF
ENO
ON
(d)
OFF
(1)
(1) When (s1) turns on while EN is on, (d) turns on.
(2) When (s2) turns on while EN is on and (s1) is off, (d) turns off.
Operation error
There is no operation error.
ON ON
OFF OFF
ON ON
ON ON
OFF OFF
Operation result
ENO
TRUE
FALSE
ON ON
ON ON
OFF OFF
ON
ON
OFF
(2)
ON ON
OFF OFF
ON ON
ON ON
OFF OFF
(d)
Operation result output value
Previous output value
ON ON
ON ON
OFF OFF
ON
ON
OFF
34 BISTABLE FUNCTION BLOCKS
34.1 Bistable Function Block (Set-Dominant)
34
1973