Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 - Manual (Page 339)

Publication 1758-UM002D-EN-P - October 2010
Enron Modbus Protocol for the 1758-FLO DataSite Controller 339
Event and Alarm Logs
The 1758-FLO DataSite event and alarm logs can be read as the Enron
Modbus event/alarm log. The format of the log is shown in the following
tables. The events are saved in records 1…700 in the log, and alarms are saved
in records 701…1000 in the log. For the Event Type or Event Code, see
Chapter 6, Global Event Codes for Modbus Protocols .
Format of event records
Field Size Type Description
Date 4 FLOAT Log date in the format, MMDDYY.0
Time 4 FLOAT Log time in the format, HHMMSS.0
Event serial 4 FLOAT Serial number (0…65535)
Meter run 2 Short integer Meter run number (0…7)
Event type 2 Short integer Description of event type
Old value 4 FLOAT Old value
New value 4 FLOAT New value
Format of alarm records
Field Size Type Description
Date 4 FLOAT Log date in the format, MMDDYY.0
Time 4 FLOAT Log time in the format, HHMMSS.0
Alarm serial 4 FLOAT Serial number (0…65535)
Register add 2 Short integer Modbus register address which
generates the alarm
Alarm type 2 Short integer There are four alarm types:
1: ALARM_HI_LIMIT
2: ALARM_HI_RECOVE
3: ALARM_LOW_LIMIT
4: ALARM_LOW_RECOVE
Value 4 FLOAT New value