Brooks Instrument SLAMf Series - Manual (Page 42)

3-8
Section 3 Operation Installation and Operation Manual
X-TMF-SLAMf-MFC-eng
Part Number: 541B032AAG
April, 2013
Brooks ® Digital MFC's and MFM's
3-6 -1 Alarms and Warnings (Analog versions only)
Connector Pin 3, on the 15 pin D-Connector provides an open collector
TTL output that will close depending on the alarm/warning situation and the
alarm settings.
Alarms and Warnings are a user configurable feature. This feature may be
adjusted via the Service Port using a special software application available
from Brooks. Reference the Brooks Service Suite User Manual for more
information about the Service Port and Service Tool software applications.
Each alarm has the following common user configurable traits:
Severity - The options are Off, Warning and Alarm. When set to Off, the
conditions are not monitored and no actions will be taken. When set to
Warning, the Alarm LED will flash Green when the monitored value
exceeds the specified conditions. (See Alarm Code attribute). When set to
Alarm, the Alarm LED will flash Red and the Analog Outputs will act based
on the assigned Output Alarm Behavior when the monitored value exceeds
the specified conditions.
Alarm Code - The alarm code specifies the code to be flashed on the LED
to indicate that an alarm/warning condition has occurred. When more than
one alarm/warning is active, then the LED will indicate the most severe
alarm with the highest Alarm Code. An Alarm is more severe than a
Warning. Alarm Codes do not have to be unique, i.e., more that one
alarm/warning type can use the same alarm code.
Latching Enable - When an alarm/warning is set to non-latching that
means the alarm is indicated only when the monitored value exceeds the
specified conditions. When the alarm/warning is set to latching. This
means that the alarm/warning will be indicated when the monitored value
first exceeds the specified conditions, and will be indicated until the user
clears the alarm. If the user clears the alarm while the monitored value still
exceeds the specified conditions, then the alarm will be re-latched and
continue to be indicated.
Contact Enable - If the alarm condition is detected and the severity is
alarm or warning, and the alarm contact is enabled, then the alarm contact
is “closed”.
Low Limit - The value of the monitored value below which is considered
an alarm/warning condition. (This attribute not valid for alarms that monitor
a state condition of the device.)
High Limit - The value of the monitored value above which is considered
an alarm/warning condition.(This attribute not valid for alarms that monitor
a state condition of the device.)
Delay - The time in seconds that the value must remain above the high
limit or below the low limit before an alarm/warning condition is indicated.