Emerson DL8000 - Modbus Configuration History Table Tab

DL8000 Preset Instruction Manual
B-8 Modbus Communications Revised February-2016
Function
Code
Register Field Data Field Description
03
703 - Daily
History
Daily History
Archive
Register Index
(0 to 34)
Response contains two floating point values for the time and
date stamp of the history archive (time stamp = HHMMSS
and date stamp = MMDDYY) and floating point values for
each of the defined history points for that History Archive
Register.
03
704 - Hourly
History
Hourly or
Periodic
History Archive
Register Index
(0 to 839)
Response contains two floating point values for the time and
date stamp of the history archive (time stamp = HHMMSS
and date stamp = MMDDYY) and floating point values for
each of the defined history points for that History Archive
Register.
1
The Periodic Index, Daily Index, and Event/Alarm data fields address a history index number.
2
The Event and Alarm Log record consists of the bytes shown in Table A-4. Table A-5 provides a breakdown of the bit map in bytes 1-2.
B.3.1 Modbus Configuration History Table Tab
The Modbus History Table allows you to configure the Periodic and
Daily history values and Event/Alarm records for retrieval through
Modbus Protocol, using Function Code 03. You define three registers to
retrieve the current date in the DL8000, the current time in the DL8000,
and Event/Alarm records. You can also use the Modbus History Table
to define the Periodic and Daily registers for up to twenty groups of
history points.
Note: Before configuring the Modbus History, be sure to completely
configure the History Segment and History Point.
To access this screen:
1. Select Configure > MODBUS. The Modbus Configuration screen
displays.
2. Select the History Table tab. The Modbus History Table displays.