Mitsubishi Electric MELSEC-Q/L Programming Manual page 176

• 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 OFF
s2
OFF
ENO
ON
d
OFF
Sets d when EN = ON and
Operation error
• No operation error occurs.
Program example
■SR(_E)
The program which outputs bit type data input to (s1) from (d) and holds the output, and resets the value of (d) only when bit
type data input to (s2) is 1 and the data input to (s1) is 0.
• Function without EN/ENO (SR)
[Structured ladder/FBD]
[ST]
SR_Inst(_S1:=g_bool1, RESET:=g_bool2, Q1:=g_bool3);
• Function with EN/ENO (SR_E)
[Structured ladder/FBD]
[ST]
SR_E_Inst(EN:= X0, _S1:=g_bool1, _R:=g_bool2, Q1:=g_bool3, ENO:=Y20);
5 APPLICATION FUNCTIONS
174
5.9 Standard Bistable Function Blocks
ENO
TRUE
FALSE
ON ON
ON ON
OFF
ON
OFF
s1 = ON. Resets d when EN = ON,
ON
ON ON
OFF OFF
ON ON
OFF
s1 = OFF and s2 = ON.
(d)
Operation output value
Previous output value
ON
ON
OFF
ON