Rockwell Automation 1440-DYN02-01RJ XM Dynamic Measurement Module - Manuel (Page 82)

82 Publication ICM-UM002F-EN-E - March 2013
Chapter 3 Configure XM Module in RSLogix 5000 Software
2. Configure the parameters, as necessary.
In this field Values are Comments
Enable Relay Check to enable the virtual relay.
Clear to disable the virtual relay.
Latch Enable Check if the relay must be explicitly reset after the
alarm subsides.
Clear if you want the relay to reset itself once the
alarm condition has passed.
A latched relay can be reset using RelayReset
in the output tag.
See I/O Data Tags on
page 91 .
Fault Value Choose the fault value.
• Energized - The relay is de-energized under normal
operating conditions and becomes energized when
the alarm limits are exceeded. This means that
under non-alarm conditions, the relay closes the
circuit between the common and the normally
closed (N.C.) terminals. Under alarm conditions, the
relay changes state to close the circuit between
the common and the normally open (N.O.)
terminals.
• De-energized - The relay is energized under normal
conditions, and becomes de-energized when the
alarm limits are exceeded. The normally energized
operating mode may also be referred to as
fail-safe. This means that under non-alarm (with
power applied to the unit) conditions, the relay
closes the circuit between the common and the
N.O. terminals. Under alarm or loss of power
conditions, the relay changes state to close the
circuit between the common and N.C. terminals.
This determines what happens to the relay
when an alarm is indicated.
Note: This affects only the virtual relay. The
Relay tag in the input data type works the
same regardless of this configuration setting.
One (1) means the associated Condition is
present, and 0 means the associated Condition
is not present.
Hold Last Value in Idle Mode Check to retain the last relay state during
configuration. For example, if the relay is energized
under normal conditions, the relay remains energized
on subsequent idle/program mode transitions.
If clear, the relay goes to normal state during
reconfiguration.
Delay Enter the length of time for which the Activation Logic
must be true before the relay is activated. Set the value between 0...65.535 seconds.
This reduces the nuisance alarms caused by
external noise and/or transient vibration
events.