User`s guide

Function Blocks
Function Block Categories and Types
Release E UMC800 Control Builder User’s Guide 59
1/01
Block Type Description Graphic Form
MDFL Mode Flag - Turns on an output that corresponds to the
current value of mode. Turns all other outputs off.
One of each set (AUTO, MAN, IMAN, LO) and (LOCAL,
REM) is ON.
TPSC Three Position Step Control - Motor position control without
position sensing. Allows the control of a valve or other
actuator having an electric motor driven by two controller
outputs; one to move the motor upscale, the other to move it
downscale, without a feedback slidewire linked to the motor
shaft.
WTUN Write Tuning Constants - Writes the numerical value of
Gain, Rate, and Reset to a Target PID, TPSC, or CARB block
without any operator interaction.
AMB Auto/Manual Bias - On transfer from Manual to Auto; Bias is
calculated to make PV + Bias = Output.