Mitsubishi Electric MELSEC iQ-R Series - Page 1975

34 BISTABLE FUNCTION BLOCKS
34.1 Bistable Function Block (Set-Dominant)
1973
34
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
2. Function block with EN/ENO
The execution conditions and operation results will be as follows.
• Timing chart
Operation error
There is no operation error.
(1) When (s1) turns on, (d) turns on.
(2) When (s2) turns on while (s1) is off, (d) turns off.
Execution condition Operation result
EN ENO (d)
TRUE (executed) TRUE Operation result output value
FALSE (not executed) FALSE Previous output value
(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.
OFF OFF
ON
OFF OFF OFF
ON ON ON ON ON
(s1)
OFF
OFF OFF
ON
OFF OFF OFF
ON ON ON ON ON
OFF
OFF
ON ON ON ON ON
(s2)
(d)
(1) (2)
ON ON ON ON ON
EN
OFF OFF
ON
OFF OFF OFF
ON ON ON ON ON
(s1)
OFF
OFF
ON ON
(s2)
ENO
OFF
ON
OFF OFF
ON ON
(d)
(1) (2)