Allen-Bradley 1444-TSCX02-02RB User Manual page 413

Table 141 - Alarm Event Types
ID Name
01 Measurement Alarm Status
02 (OK) Voted Alarm Status
03 (Alert) Voted Alarm Status
04 (Danger) Voted Alarm Status
05 Special Relay Source Alarm
Status
Notes
While the returned data is the same, the trigger is different in each case.
A change in the upper 16 bits (considered 'pre-alarm' data) triggers a measurement alarm status event.
A change in the overall alarm state (true or false) triggers a voted alarm status change.
The voted alarm status changes are categorized as OK, Alert, or Danger, which is based on which alarm
output they relate to (encoded as bits 14/15).
The special relay source alarm status is used where a dedicated module fail or 'inhibit active' relay has
been configured and reflects a change in status of this monitoring.
Table 142 - Buffer Event Types
ID Name
01 Trend Data-Set Status
02 Alarm Data-Set Status
03 Transient Data-Set Status
Notes
Buffer events indicate a change in status of these buffers (example: armed to populating or population to
data ready)
Worked Example of Event Decoding
Each event log entry is a 16 byte record consisting of a number of sub
structures: Example hex data on the wire: 01 15 71F53854 9600 00 00 00 00
00 40 00 00
Table 143 - Event Log Entries
Subsection
Event Type
Event ID
Event time (seconds)
Event time (subseconds)
Event Data
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Bytes 8...15 Application
Previous Alarm Status 8...11 * New Alarm Status 12...15
Previous Alarm Status 8...11 * New Alarm Status 12...15
Previous Alarm Status 8...11 * New Alarm Status 12...15
Previous Alarm Status 8...11 * New Alarm Status 12...15
Previous Alarm Status 8...11 * New Alarm Status 12...15
Bytes 8...15 Application
Bytes 8/9 are previous Trend Buffer status, bytes 10/11 are the new Trend
Buffer status
Bytes 8/9 are previous Alarm Buffer status, bytes 10/11 are the new
Alarm Buffer status
Bytes 8/9 are previous Transient Buffer status, bytes 10/11 are the new
Transient Buffer status
Location Example
Byte 0 01
Byte 1 15
Bytes 2...5 5438F571
Bytes 6...7 0096
Bytes 8...15 00 00 00 00 00 40 00 00
CIP Objects Appendix A
413