Standard Bistable Function Blocks; Standard Bistable Function Blocks (Set-Dominant) - Mitsubishi Electric MELSEC-Q/L Programming Manual

5.9

Standard Bistable Function Blocks

Standard bistable function blocks (Set-dominant)

SR(_E)
High
Basic Process
Redundant Universal
performance
Structured ladder/FBD
SR_E
EN ENO
s1 d
s2
The following function(s) can go in the dotted squares.
SR, SR_E
■Argument
Input/output Name
argument
Input argument EN
s1(_S1)
s2(RESET)
Output argument ENO
d(Q1)
Processing details
■Operation processing
Sets (d) when (s1) is turned ON and resets (d) when (s2) is turned ON while (s1) is OFF. (d) is not reset even when (s2) is
turned ON while (s1) is ON.
■Operation result
• Function without EN/ENO
An operation is executed and the operation value is output from (d).
[Timing chart]
ON ON
s1
OFF OFF
ON
s2
OFF
ON ON
d
OFF OFF
Sets d when = ON. Resets
s1
LCPU
ST
SR_E (EN, s1, s2, ENO, d);
Description
Executing condition (TRUE: Execution, FALSE:
Stop)
Input
Execution result (TRUE: Normal, FALSE: Error or
stop)
Output
ON ON
OFF OFF
ON ON
ON ON
OFF OFF
d when = OFF and s2 = ON.
s1
Data type
Bit
Bit
Bit
Bit
ON ON
OFF OFF
ON ON
ON ON
OFF OFF
5 APPLICATION FUNCTIONS
5.9 Standard Bistable Function Blocks
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