WattMaster WCC III part 4 - Manual (Page 61)

WCC III Technical Guide 3-57
WCC3.EXE SCREEN DESCRIPTIONS
You may make your selection by pressing the <space bar> once
for each choice until the desired point type has been selected and
then pressing
<Enter> .
Note that the H and C contact designations do not mean that they
must be used to control heating or cooling loads respectively. They
are independent contacts.
Description: ______________
A short message is entered here which is displayed on Summary
and Data Entry/Editing Screens to help you to remember points
within the system. You may enter up to ten characters (control
codes, ALT codes, and the double quote character are not allowed).
Analog Control by: _______________
Specifi es the analog point address that acts as the input signal
source for this control output.
Schedule Control by: _________________
Specifi es the binary point address used to schedule this control
output. When this address is OFF, the OFF schedule setpoints are
used; when it is ON, the ON schedule setpoints are used.
Alternate Mode Selected by: _________________
Specifi es the binary point address that initiates the Alternate mode.
When this address is zero (or OFF), the Normal mode is selected;
when it is one (or ON), the Alternate mode is selected.
Override __________ when _________ is __________
This fi eld is used to override the satellite contact either open or
closed based on a binary value going ON or OFF. This has priority
over everything except the minimum on and off times.
Override ______
Because this is a “choice” fi eld, the list of available choices will be
displayed at the bottom of the screen:
< CLOSED, OPEN >
Closed means that the satellite contact will be forced closed when
the override statement is true. Open means the satellite contact
will be forced open. To make your selection, press the
<space
bar> once for each choice until the desired override state has been
selected, and then press <Enter>.
When _____
This is where you enter a binary value.
is _____
Because this is a “choice” fi eld, the list of available choices will be
displayed at the bottom of the screen:
<OFF, ON>
To make your selection, press the <space bar> once for each
choice until the desired override state has been selected, and then
press
<Enter> .
The override is enabled when this statement is true. For example, if
you enter “Override Open When GB1 is ON,” the satellite contact
will be forced open when global binary #1 goes ON.
Contact Open Message #: ____
Contact Closed Message #: ____
Specifi es a pair of message numbers, one for the contact open state
and the second for the contact closed state. These numbers refer to
a message on the On/Off Message Screen. For example, message
#1 might be “Fan On” and message #2 “Fan Off.” If you want the
message on the Control Output Summary Screen to be “Fan On”
when the satellite contact is closed, enter “#1” as the contact closed
message etc.
Minimum Off Time: ____ seconds
Minimum On Time: ____ seconds
Specifi es the minimum ON and OFF times for switching a load
to its opposite state (i.e., ON to OFF or OFF to ON). That is, once
the satellite contact closes it will remain closed for the minimum
ON time, and once it opens it will remain open for the minimum
OFF time. The range is 0 to 60 seconds or minutes, depending on
the unit of time selected. Because this is a “choice” fi eld, the list of
available choices will be displayed at the bottom of the screen:
<Seconds, Minutes>
To make your selection, press the <space bar> once for each
choice, and when the desired unit of time appears, press <Enter> .
Note that the minimum ON and OFF time has precedence over
demand limiting, overrides, etc.
Hysteresis: = _____ x 0.1
Hysteresis is a software entry that allows an operator to specify
how much a measure variable, such as room temperature, has to
change before the switch changes state. For example, consider
a temperature setpoint of 72 °F with a +/-0.5 °F hysteresis. The
switch will change state (open/close) when the temperature rises
to 72.5 °F and will not switch back to its original state until the
temperature drops to 71.5 °F.
Control Output Dual Limit Screen