FB_BA_Actuator_3Point
The function block FB_BA_Actuator_3Point is used to control a 3-point actuator, e.g. a 3-point damper or a 3-point valve.
The command for opening the actuator is connected to output bOpen.
The command for closing the actuator is connected to output bClose.
In automatic mode (nOpMode = 0) the control commands of bCmdOpen and bCmdClose are forwarded directly to the outputs bOpen and bClose.
The nOpMode input is used to determine the operation mode of the 3-point actuator:
- 0 = Automatic
- 1 = Stop (bOpen = bClose = FALSE)
- 2 = Close
- 3 = Open
Inputs
VAR_INPUT
bEn : BOOL;
bAutoOpen : BOOL;
bAutoClose : BOOL;
nOpMode : UDINT
END_VAR
Name | Type | Description |
|---|---|---|
bEn | BOOL | General enable of the function block. |
bAutoOpen | BOOL | Command to open the actuator |
bAutoClose | BOOL | Command to close the actuator. |
nOpMode | UDINT | Select operation mode (0 = Automatic, 1 = Stop (bOpen = bClose = FALSE), 2 = Close, 3 = Open). |
Outputs
VAR_OUTPUT
bOpen : BOOL;
bClose : BOOL;
END_VAR
Name | Type | Description |
|---|---|---|
bOpen | BOOL | Open control output |
bClose | BOOL | Close control output |
Requirements
Development environment | Required PLC library |
|---|---|
TwinCAT from v3.1.4024.22 | Tc3_BA2 from v5.2.5.0 |