Mitsubishi Electric MELSEC-Q/L Programming Manual page 178

• Function with EN/ENO
The following table shows the executing conditions and operation results.
EN
TRUE (Operation execution)
FALSE (Operation stop)
[Timing chart]
ON
EN
ON
s1
OFF
s2
OFF OFF
ENO
ON
d
OFF
Turns d ON when EN = ON,
s1 = ON and s2 = OFF.
Operation error
• No operation error occurs.
Program example
■RS(_E)
The program which outputs bit type data input to (s1) from (d) and holds the output, and resets forcibly the value of (d) when
bit type data input to (s2) is 1.
• Function without EN/ENO (RS)
[Structured ladder/FBD]
[ST]
RS_Inst(_S:=g_bool1, _R1:=g_bool2, Q1:=g_bool3);
• Function with EN/ENO (RS_E)
[Structured ladder/FBD]
[ST]
RS_E_Inst(EN:=X0, _S:=g_bool1, _R1:=g_bool2, Q1:=g_bool3, ENO:=Y20);
5 APPLICATION FUNCTIONS
176
5.9 Standard Bistable Function Blocks
ENO
TRUE
FALSE
ON ON
ON
OFF
Turns d OFF when EN = ON and
(d)
Operation output value
Previous output value
ON ON
ON
OFF
ON
s2 = ON.
ON
OFF