Chapter 8 Logic Instructions
8-15
FB/FC
FB SR is used for giving priority to the Set input.
Parameters
Meaning
Description Valid range
SET
Input
SET signal TRUE or FALSE
Reset
signal
Reset signal TRUE or FALSE
Q
signal
Output Output signal TRUE or FALSE
Boolean
Bit string Integer
Real
number
Time, date
String
BYTE
DWORD
USINT
UINT
UDINT
ULINT
SINT
INT
LINT
LREAL
TIME
DATE
TOD
STRING
SET
●
Reset
●
Q
●
Note:
The symbol ● indicates that the parameter is allowed to connect to the variable or constant of the data
type.
Function Explanation
When the SET and Reset inputs of RS are both TRUE, SET is given the priority.
SR
EN ENO
SET
Q
SR_instance
Q
Reset