WattMaster WM-WCC3-TGD-01B - Manual (Page 277)

WCC III Technical Guide 3-163
WCC3.EXE SCREEN DESCRIPTIONS
Mode: 1 Combinatorial
Specifi es the mode used to generate the ON or OFF value of the
binary global. Because this is a choice fi eld, the following list of
available choices will be displayed at the bottom of the screen:
<Combinatorial, Compare, External, Alarm,
Alarm-by-Class, One Shot, Clock, Delay, PWM,
Lead-Lag>
Make your selection by pressing the <space bar> once for each
choice until the desired mode has been selected, and then press
<Enter> . Whenever you change modes, you must fi rst clear the
existing screen by using the <Ctrl> <Home> feature.
The Combinatorial mode has the capability of generating the
ON or OFF value of the binary global using “and/or” logic. For
example, binary global #1 (GB1) can be programmed to be ON
if the outside air temperature is above 60 ºF, the building is in the
day mode, and the chilled water pump is running. The WCC III
system could then be programmed to turn on a chiller whenever
GB1 is ON. The mode used to generate the ON/OFF value of the
binary global using “and/or” logic is called Combinatorial because
several statements are combined together to determine the ON or
OFF value of the binary global.
Value is ____ when ____ of the following conditions are
met
Specifi es the state (or value) that the binary global will take if the
specifi ed conditions are true. Because these two fi elds are choice
fi elds, the list of available choices will be displayed at the bottom
of the screen:
<OFF, ON> and <ANY, ALL>
Make your selection by pressing the <space bar> once for each
choice until the desired value and condition have been selected,
and then press
<Enter> .
To understand how the combinatorial binary global works, a short
description of logic is needed. The combinatorial global is read
as “Value is (ON or OFF) when (ANY or ALL) of the following
conditions are met.”
The phrase “Value is (ON or OFF)...” simply states what value the
binary global will have if and only if the rest of the phrase is a true
statement.
BINARY GLOBAL SCREEN
COMBINATORIAL MODE
BINARY Global #: 1 Name is GB1
Description: Global Binary 1 On Message #: 1 ON
Mode: 1 Combinatorial Off Message #: 2 OFF
Value is OFF when ANY of the following conditions are met.
W1 is ON default false
In Local set this global defaults to Last Value.
-----------------------ALARM-------------------------
Set Condition: None Type: 1 Message 5 Global Alarm
HOME for menu
Binary Global Screen’s WCC III Logical Address is GBXXX, where GB = Global Binary and XXX = Global Binary Address
Binary Global Combinatorial Mode Screen