Rockwell Automation 1440-TTC06-00RE XM-362 Temperature Module - Manual (Page 60)

Publication GMSI10-UM008D-EN-P - August 2010
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Relay Parameters The Relay parameters control the operation of the relays. The Temperature
modules do not have an on-board relay. The relays are added when an
Expansion Relay (XM-441) module is connected to the Temperature modules.
The XM-361 and XM-362 support two Expansion Relay modules for a total of
eight relays. Use these parameters to configure which alarm(s) the relay is
associated with, as well as the behavior of the relay.
Alert Threshold (Low) The lesser threshold value for the alert (alarm)
condition.
Note: This parameter is not used when Condition is
set to "Greater Than" or "Less Than."
Same measurement unit as
Temperature Units selection. Note
that for rate alarms, it is units per
minute.
Danger Threshold (Low) The lesser threshold value for the danger (shutdown)
condition.
Note: This parameter is not used when Condition is
set to "Greater Than" or "Less Than."
Same measurement unit as
Temperature Units selection. Note
that for rate alarms, it is units per
minute.
Hysteresis The amount that the measured value must fall
(below the threshold) before the alarm condition is
cleared. For example, Alert Threshold = 120 and
Hysteresis = 2. The alarm (alert) activates when the
measured value is 120 and will not clear until the
measured value is 118.
Note: The Alert and Danger Thresholds use the
same hysteresis value.
Note: For the Outside Range condition, the
hysteresis value must be less than Alert Threshold
(High) – Alert Threshold (Low).
Same measurement unit as
Temperature Units selection. Note
that for rate alarms, it is units per
minute.
Alarm Parameters
Parameter Name Description Values/Comments
IMPORTANT
A relay can be defined, regardless of whether or not it is
physically present. A non-physical relay is a virtual relay.
When a relay (physical or virtual) activates, the module
sends a Change of State (COS) message to its master,
which acts on the condition as necessary. An XM-440
Master Relay Module can activate its own relays in response
to a relay (physical or virtual) activation at any of its slaves.