MCTB
162
The alarm numbers,
Alarm #
, identify the alarms currently shown on the screen along with the alarm description
which contains the loop name that the alarm is assigned to as well as the alarm type. The left and right scroll
buttons at the upper right of the screen will be shown if more than two alarms are available so that the user can
access each alarm by pressing left or right to go to the previous or next alarm.
The alarm
Delay (MM.SS)
and
SP
(set point) fields allow the user to enter the alarm delay (in minutes and
seconds) and the set point at which the alarm is to activate. The alarm type and alarm hysteresis are defined
by the OEM in the MCTB configuration and cannot be changed. Only the alarm delay and set point can be
changed by the user.
NOTE:
The End of Program alarm type does not have a set point or alarm delay.
The
Alarm Message
is the text notification that appears on the Alarm screen when the alarm activates. This
message can be edited (up to 25 characters maximum) so that the alarm message more accurately describes
what the alarm means.
NOTE:
The MCTB supports a total of 9 ha 10 software alarms for a total of 19 alarms. The MCTB
loop control boards can provide up to 3 alarm outputs each
for a total of 9 alarms (when three B42’s
used or two B42’s and limit control). Software alarms activate no hardware electrical outputs when
energized and are for display only including audible alarm and email operation.
Depending upon the configuration of the MCTB, some B42 board outputs may perform specific control
or event functions. The use of each output, and what it controls, is determined by the system designer.
If there are questions or concerns about the configuration and operation of your MCTB controller,
contact your OEM for further information. Only your OEM can address equipment related issues.
9.2.1
Limit Alarms
If the limit option is installed, the high and low limit alarm set points and alarm (output 2) set point will be provided
depending upon the configuration of the limit control. All limit alarm set points are locked in addition to system
security settings if configured. In order to change a limit alarm set point the field must first be unlocked.
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