WattMaster WCC II - Manual (Page 21)

Section 1: General Instructions
WCC II Operator’s Guide
Operator Interfaces 1-11
Analog Alarm Limit
Each analog input can have a low and high limit assigned to it
on the Analog Input Screen. If the value of the analog input falls
below the low limit or rises above the high limit, the system
automatically generates an alarm. For example, assume that the
analog input in question is a room temperature sensor located in
an offi ce space. If the space temperature falls below 68 °F or rises
above 80 °F during the occupied period, we want an alarm to print
on the printer. To set up the alarm limits, fi rst sign on by accessing
the System Parameter Screen and entering your password. An
access level of 1 or greater is required to enter or change alarm
limits. After you are signed on, return to the Main Menu and place
the cursor over “ANALOG INPUT” and press
. An
Analog Input Screen similar to what is shown below should come
into view:
-----------------------------------------------------------------------------------------
Satellite #1 ANALOG INPUT #1
Description: RM 101 Type: Analog
Pattern for values associated with this input: xxx.x
Units @ 0% scale: 0.0 Deg F Units of Measure Message #: 1
@ full scale: 100.0 Deg F Filter Time Constant: 8 seconds
-------------------ALARMS--------------------
Controlled by: W1 Limits Low High
Alarm Type: 1 On 68.0 80.0 Deg F
Alarm Message #’s: Low 2 High 1 Off 50.0 90.0 Deg F
Alternate Limits selected by:.... On (alt) 0.0 0.0 Deg F
Off (alt) 0.0 0.0 Deg F
Limit overlap time
after control change: 20 Minutes Local set 55.0 90.0 Deg F
--------------------BINARY SETPOINT-----------------------
OFF Above 0.0 Deg F On Message #: 0
OFF Below 0.0 Deg F Off Message #: 0
Home for menu
-----------------------------------------------------------------------------------------
The alarm limits along with the alarm type and alarm message
numbers are assigned on this screen (see the Analog Input Screen
section of this guide on page 3-9 for more information). If the
space temperature drifts out of the entered alarm limits, the system
will automatically generate an alarm. For example, assume that the
space temperature rises above the high limit value of 80 °F. Alarm
message #1 (High Temperature) along with the time and date of the
alarm and the high peak value of the room temperature will appear
on Analog Input Summary Screen and the Alarm Summary Screen.
Within one minute from the time the alarm appears on the screen, it
will automatically be printed on the local printer. (To acknowledge
alarms, use the
function described in the Help Screen
(page 3-1), Analog Input Summary Screen (page 3-7), and Alarm
Summary Screen (page 3-36) sections of this guide.)