Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 83)

Rockwell Automation Publication 1440-UM001C-EN-P - May 2014 83
Configure the XM-124 Standard Dynamic Measurement Module Chapter 2
configure which alarm the relay is associated with, as well as the behavior of the
relay.
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.
Table 8 - Relay Parameters
Parameter Name Description Options/Comments
Number (XM Serial Configuration Utility only) Sets the relay to be configured in the XM Serial Configuration Utility. Relay Number 1 is the on-board relay. Numbers
2…5 are either relays on the Expansion Relay
module when it’s connected to the module or
virtual relays.
Virtual relays are non-physical relays. Use them
when you want the effect of the relay (monitor
alarms, delay, and change status) but do not need
an actual contact closure. For example, a PLC or
controller monitoring the relay status.
Important: The Relay Installed parameter
indicates whether a relay is a virtual relay or a
physical relay on a module.
Name (XM Serial Configuration Utility only) A descriptive name to help identify the relay in the XM Serial
Configuration Utility. Maximum 18 characters
Enable Enable/disable the selected relay.
Important: The Relay Current Status is set to ‘Not Activated’ when
the relay is disabled. See
page 96 .
Controls whether the relay must be explicitly reset after the alarm
subsides.
Activation Delay Enter the length of time for which the Activation Logic must be true
before the relay is activated. This reduces nuisance alarms caused by
external noise and/or transient vibration events.
Important: True Peak and True Peak-to-Peak signal detection is
more sensitive to transients and noise. To avoid false relay trips, it is
strongly recommended that the Activation Delay value is greater
than the Overall Time Constant value when Signal Detection is
set to ‘True Peak’ or ‘True Peak-to-Peak.’
Important: The definition of each alarm may also include a
Detection Delay time. If so, the alarm must persist for the specified
Detection Delay time before the Relay Activation Logic can consider
the alarm condition. Consequently, if delays are applied to both the
alarm and the relay, the actual delay time of the relay is the sum of
the Alarm Detection Relay and the Relay Activation Delay. Enter a value between 0…65.5 seconds. The
default is 1 second.
XM Configuration
Utility EDS File
Check to Enable Enabled
Clear to Disable Disabled
XM Configuration
Utility EDS File
Latching Latching Option
XM Configuration
Utility EDS File
Check means latching
(relay must be explicitly
reset) Latching
Clear means non-latching
(relay is reset once the
alarm condition has
passed) Nonlatching