Bistable Function Blocks (Reset Priority) - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

27.2

Bistable Function Blocks (Reset Priority)

RS(_E)
These function blocks judge two input values and output 1 (TRUE) or 0 (FALSE).
Ladder diagram, FBD/LD
[Without EN/ENO]
s1 d
s2
Setting data
■Descriptions, types, and data types
Argument
EN
s1(S)
s2(R1)
ENO
d(Q1)
Processing details
■Operation processing
• When (s1) turns ON, (d) is set. When (s2) is turned ON, (d) is reset.
• If (s1) is turned ON when (s2) is ON, (d) is not set.
■Operation result
1.
Function block without EN/ENO
The operation processing is executed. The operation output value is output from (d).
• Timing chart
ON
(s1)
OFF
ON
(s2)
OFF OFF
ON
(d)
OFF
(1)
(1): When (s1) is on and (s2) is off, (d) turns on.
(2): When (s2) is on, (d) turns off.
27 BISTABLE FUNCTION BLOCKS
1052
27.2 Bistable Function Blocks (Reset Priority)
[With EN/ENO]
EN ENO
s1 d
s2
Description
Execution condition (TRUE: Execution, FALSE: Stop)
Set instruction
Reset instruction
Output status (TRUE: Normal, FALSE: Abnormal)
Output
ON ON
ON ON ON
OFF
ON ON
OFF OFF OFF
(2)
Structured text
[Without EN/ENO]
RS_1(S:=s1,R1:=s2,Q1:=d);
[With EN/ENO]
RS_E_1(EN:=EN, ENO:=ENO, S:=s1,R1:=s2,Q1:=d);
ON ON
ON ON ON
OFF OFF
ON ON
OFF OFF
Type Data type
Input variable BOOL
Input variable BOOL
Input variable BOOL
Output variable BOOL
Output variable BOOL
ON
ON