WattMaster WM-WCC3-TGD-01B - Manual (Page 172)

WCC3.EXE SCREEN DESCRIPTIONS
WCC III Technical Guide 3-58
The multiplier is automatically selected based on the data pattern
for the analog input associated with this screen. If the data pattern
is xxx.x, then 0.1 will appear as the multiplier. If a +/-0.5 hysteresis
is desired, input 5, and the system will multiply 5 by 0.1 to equal
0.5.
Low Limit High Limit
Local Set _______ Between_______ & _______
On Schedule _______ Between_______ & _______
Off Schedule _______ Between_______ & _______
On Schedule (Alt)____ Between_______ & _______
Off Schedule (Alt)_____Between_______ & _______
This group of inputs specifi es the setpoints for the “Local Set,”
“Normal,” and “Alternate” modes.
The “Local Set” setpoints are selected whenever the front end
computer quits communicating with the satellite controller.
The value of the input in the Schedule Control by fi eld and the
Alternate Mode Selected by fi eld determine which setpoints will
be used as shown below:
Schedule Alternate Mode
Control by: Selected by: Setpoint
On Off On Schedule
On On On Schedule (Alt)
Off Off Off Schedule
Off On Off Schedule (Alt)
In the fi rst fi eld you specify whether you want the satellite contact
to “Open” or “Close” when the value of the analog input is between
the limits. Because this is a “choice” fi eld, the list of available
choices will be displayed at the bottom of the screen:
You may make your selection by pressing the until
the desired contact state appears and then pressing .
If you have an application where you want the low limit to be
negative infi nity, input the slash (/) for the low limit value. The
system will show a series of minus signs as the (-----) setpoint. In
the same manner, if you want the high limit to be positive infi nity,
input the slash (/) as the high limit value. The system will show a
series of plus signs (+++++) as the input value.
Data register is measured from ______ and ______
Hysteresis.
For the phrase: “Data register is measured from ...”
and for the phrase: “and __________ Hysteresis.”
You may make your selection by pressing the until
the desired defi nition appears and then pressing .
If “Midpoint” is selected, the value of the data register will be the
difference between the actual value of the analog input associated
with this screen, such as room temperature, and the midpoint
between the two setpoints.
If “Nearest Limit” is selected, the value of the data register will
be the difference between the actual value of the analog input
associated with this screen, such as room temperature, and the
nearest setpoint.
See the Data Register write-up in the General Instructions section
of this guide on page 1-9 for more information.
Logical Off is “ . . . . . “
This means that this value is Off and has no schedule control. This
value can be overridden on the Override Schedules Screen. Same
as “0”.
Null Value is “ / / / / “
This means that this value is neither On nor Off, but can also
be On or Off in certain circumstances. It is best not to leave the
Null Values in place. This value CANNOT be overridden on the
Override Schedules Screen. This value can also mean negative
infi nity.
Control Output Dual Limit Screen