ABB A43 User Manual

Communication with Modbus
2CMC48001M0201 127 A43/A44
Revision: C User Manual
9.6 Previous Values
Mapping table
Header
Data blocks
Note – Before you can use the information in this chapter you must be familiar with
and understand the information and the concepts described in “Historical Data” on
page - 114.
The following table shows an overview of the mapping table:
Function
Details
Start Reg
Size
(Hex)
Previous values
Header
8000
16
Previous values
Data block 1
8010
83
Previous values
Data block 2
8070
83
Previous values
Data block 3
80D0
83
Previous values
Data block 4
8130
83
Previous values
Data block 5
8190
83
Previous values
Data block 6
81F0
83
Previous values
Data block 7
8250
83
The following table describes the header:
Function
Start
Size
Description
Read/
Reg
write
(Hex)
Get next entry
8000
1
Write value 1 to this register to load the
R/W
next block of values and timestamp
Entry number
8001
1
Write to this register to choose an entry
R/W
number to start reading from
Date/Time
8004
3
Write to this register to choose a date/time
R/W
to start reading from
Direction
8007
1
Write to this register to choose the
R/W
direction of reading
The Data blocks contain the history of previous values. Data block 1 to 7 have
the same structure. Each block can contain up to 8 channels. Consequently, in a
meter with 50 previous values channels, there are 8 channels in each of block 1
to block 6 and 2 channels in block 7.
The registers of unused channels are filled with 0xFFFF.

ABB A43 Specifications

General

Brand	ABB
Model	A43
Category	Measuring Instruments
Language	English