ILX56-PBS
Operation
ControlLogix® Platform
User Manual
Page 46 of 87
Alarming
The ILX56-PBS supports DPV1 Alarming. The user can trigger an alarm from the Logix device
output assembly which will notify the PROFIBUS Master that a new alarm has been generated.
When the PROFIBUS Master sends a DPV1 alarm read command, the ILX56-PBS will access
the configured Logix tag to provide the required data for the specific alarm.
NOTE:
The ILX56-PBS can only allow one alarm to be triggered at a time.
To trigger an alarm notification for the PROFIBUS Master, the user will need to toggle (from 0
to 1) the AlarmTrigger tag as shown below:
Figure 4.5
– ILX56-PBS Slave Alarm Trigger
Once the alarm has been triggered, the ILX56-PBS will read the alarm data from the Logix tag
and add it to the PROFIBUS diagnostics (which will then be read by the PROFIBUS Master).
When the PROFIBUS Master acknowledges the alarm, the SlaveAlarmAck bit in the input
assembly for the field device will be set indicating to the Logix controller that the next alarm
can be triggered.
Figure 4.6
– ILX56-PBS Alarm Acknowledge
NOTE:
An alarm will only be triggered when the AlarmTrigger tag is toggled
from 0 to 1.
