%Bpr function
| Old name |
%BprB |
| Function |
The function implements a two-position controller. Result is a value of Boolean type. |
| Declaration |
BOOL %Bpr(
REAL in RV,
REAL in IV,
REAL in DeadBand,
REAL in Hysteresis,
BOOL in OO/CO
)
|
| Parameters |
| RV |
Required value. |
| IV |
Input value. |
| DeadBand |
Dead band. |
| Hysteresis |
Hysteresis. |
| OO |
Opening output. |
| CO |
Closing output. |
|
| Note |
Regulation is executed according to the left part of the figure (OO/CO = @OO) or
according to the right part of the figure (OO/CO = @CO).
Parameters:
DeadBand = AC (>0) - real valueHysteresis = BC (>0) - real value
Input variables:
IV (input value) - real valueRV (required value) - real value (constant or continuous signal)
Output variables:
OO (opening output) - value of Boolean typeCO (closing output) - value of Boolean type
Function:
- State1: IV <= RV - AD, then OO=1 and CO=0
- State2: RV - AD < IV < RV - AB, then OO is not changing and CO=0
- State3: RV - AB <= IV <= RV + AB, then OO=CO=0
- State4: RV + AB < IV < RV + AD, then OO=0 and CO is not changing
- State5: RV + AD <= IV, then OO=0 and CO=1
|