Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 - Manual (Page 313)

Publication 1758-UM002D-EN-P - October 2010
Extension Modbus Protocol for DataSite Controllers (1758-FLO) 313
Command Number 24: Read Alarm Logs
Use command number 24 to read alarm logs for up to 15 alarms at a time.
Each alarm consists of 12 registers.
The following table lists the register addresses for alarms 2…15. The data type
and attribute of each register are the same as those of the corresponding
register for alarm 1
Parameters for command number 24
Address Data Type Attribute Description
49025 u_short RW 24
49026 u_short R Return code
0: OK
49027 u_short W Reserved
49028 u_int W Pass code for user
49030 u_short W Start date index (0…299)
49031 u_short W Number of records you want to
get (1…15)
49032…49034 — — Reserved
Registers for alarm 1
Address Data Type Attribute Description
49035 u_short R Alarm ID
49036 u_short R Alarm type
49037 u_char R Year
u_char R Month
49038 u_char R Day
u_char R Hour
49039 u_char R Minute
u_char R Second
49040 u_short R Variable address
49041 float R Value
49043…49046 u_short R Reserved[4]
Registers for alarms 2…15
Address Data Type Attribute Description
49047…49058 See above See above Alarm 2
49059…49070 See above See above Alarm 3
49071…49082 See above See above Alarm 4