The function block passes the input value PV to the output OUT the first time it is called. With a rising edge (0 to 1) on input CLK, the input value IN is pased on to output Output. This value remains on the output until the next rising edge loads a new value from IN to OUT.
The data types for the input values IN, PV and the output value Output must be the same.
and can be configured as additional parameters.
If a variable and a link are connected to OUT and the variable Output is changed (e.g. by writing through the program or by forcing), the link follows the Output variable instead of keeping the last output of the SAH.
Representation:
Representation:
Representation:
CAL SAH_Instance (IN:=InputValue, CLK:=ClockInput,
PV:=PresetValue, OUT=>Output)
Representation:
SAH_Instance (IN:=InputValue, CLK:=ClockInput,
PV:=PresetValue, OUT=>Output) ;
Input parameter description:
|
Parameter
|
Data type
|
Meaning
|
|
IN
|
|
Input value
|
|
CLK
|
|
Clock input
|
|
PV
|
ANY
|
Presetpoint
|
Output parameter description:
|
Parameter
|
Data type
|
Meaning
|
|
OUT
|
ANY
|
Output value
|
