On/Off Function Block - Honeywell UMC800 Reference Manual

Function Blocks

2.45 ON/OFF Function Block

Description
The ON/OFF label stands for the On/Off Control function. This block is part of the Loops category. It
looks like this graphically on the Control Builder.
Function
Provide ON/OFF control. The output is either ON (100%) or OFF (0%).
Inputs
RSP = Remote Setpoint (% or EU per SP Units)
TRV = Track Value Output—1 = ON, 0 = OFF
TRC = Track Value Command—1 = enable, 0 = disable (Mode = Local Override)
SWI = Switch Inputs (from LPSW function block)
MDRQI= External Mode Request (connected to the MDRQO output of a MDSW function block) encoded
as follows:
0.0 = No Change
1.0 = Manual Mode Request
2.0 = Automatic Mode Request
4.0 = Local Setpoint Request
8.0 = Remote Setpoint Request
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