FB_BA_Actuator_3Point

The function block is used to control a 3-point actuator, e.g. a 3-point flap 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 (udiOpMode=0) the control commands of bCmdOpen and bCmdClose are forwarded directly to the outputs bOpen and bClose.

The udiOpMode input is used to determine the operating mode of the 3-point actuator:

• 0 = Automatic
• 1 = Stop (bOpen = bClose = FALSE)
• 2 = Close
• 3 = Open

VAR_INPUT

bEn        : BOOL;
bAutoOpen  : BOOL;
bAutoClose : BOOL;
udiOpMode  : UDINT

bEn: General enable of the function block.

bAutoOpen: Command to open the actuator.

bAutoClose: Command to close the actuator.

udiOpMode: Select operating mode (0 = Automatic, 1 = Stop (bOpen = bClose = FALSE), 2 = Close, 3 = Open)

VAR_OUTPUT

bOpen  : BOOL;
bClose : BOOL;

bOpen: Open control output.

bClose: Close control output.

Requirements