Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 84)

84 Rockwell Automation Publication 1440-UM001C-EN-P - May 2014
Chapter 2 Configure the XM-124 Standard Dynamic Measurement Module
Sets the relay activation logic:
• A or B - Relay is activated when either Alarm A or Alarm B meets
or exceeds the selected Alarm Status condition.
• A and B - Relay is activated when both Alarm A and Alarm B
meet or exceed the selected Alarm Status condition.
• A Only - Relay is activated when Alarm A meets or exceeds the
selected Alarm Status condition.
Options:
• A only
• A or B
• A and B
Sets the alarm that the relay monitors. The alarm must be from the
same device as the relay. When the Activation Logic is set to ‘A and
B’ or ‘A or B’ you can select an alarm in both Alarm A and Alarm B.
The system monitors both alarms. When the Activation Logic is set
to ‘A Only,’ you can select an alarm only in Alarm A. Alarm No. 1…16
Important: You can only select an alarm that is
enabled.
Sets the alarm conditions that cause the relay to activate. You can
select more than one:
• Normal - The current measurement is not within excess of any
alarm thresholds.
• Alert - The current measurement is in excess of the alert level
threshold but not in excess of the danger level threshold.
• Danger - The current measurement is in excess of the danger level
threshold.
• Disarm-The alarm is disabled or the device is in Program mode.
• Xdcr Fault - A transducer fault is detected on the associated
transducer.
• Module Fault - Hardware or firmware failure, or an error has
been detected and is preventing proper operation of the device.
• Tacho Fault - A required tachometer signal has not been
detected. Note that there is no transducer fault either.
Options:
• Normal
• Danger
• Xdcr Fault
• Tacho Fault
• Alert
• Disarm
• Module Fault
•
• Check to enable.
• Clear to disable.
Relay Installed Indicates whether the relay is a physical relay on a module or a virtual
relay. If the relay is a physical relay, then you can set the Failsafe
parameter.
If the relay is a virtual relay, the Failsafe parameter is not used or it is
disabled.
Determines whether the relay is failsafe or non-failsafe.
Failsafe operation means that when in alarm, the relay contacts are in
their ‘normal’, de-energized, or ‘shelf-state’ positions. In other words,
normally closed relays are closed in alarm, and normally open relays
are open in alarm. With failsafe operation, a power failure equals an
alarm.
The following are true of a relay in failsafe operation:
• The relay is energized when power is applied to the module.
• The relay in a nonalarmed condition has power applied to the coil.
• In alarm condition, power is removed from the relay coil, causing
the relay to change state.
For non-failsafe operation, the following are true:
• Under nonalarm conditions, the relay closes the circuit between
the common and the N.C. (normally closed) terminals.
• Under alarm conditions, the relay changes state to close the circuit
between the common and the N.O. (normally open) terminals.
For failsafe operation, the following are true:
• Under nonalarm (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 the N.C. terminals.
Table 8 - Relay Parameters
Parameter Name Description Options/Comments
XM Configuration
Utility EDS File
Activation Logic Logic
XM Configuration
Utility EDS File
Alarm A/B Alarm Identifier
A/B
XM Configuration
Utility EDS File
Alarm Status to Activate
On Alarm Levels
XM Configuration
Utility EDS File
Check = Physical Relay Installed = Physical
Relay
Clear = Virtual Relay Not Installed =
Virtual Relay
XM Configuration
Utility EDS File
Failsafe Relay Failsafe Option
XM Configuration
Utility EDS File
Check means failsafe Failsafe
Clear means non-failsafe Nonfailsafe