Previous Values - ABB A43 User Manual

Communication with Modbus

9.6 Previous Values

Note –
and understand the information and the concepts described in "Historical Data" on
page - 114.
Mapping table
The following table shows an overview of the mapping table:
Function

Previous values

Previous values
Previous values
Previous values
Previous values
Previous values
Previous values
Previous values
Header
The following table describes the header:
Function
Get next entry
Entry number
Date/Time
Direction
Data blocks
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.
2CMC48001M0201
Revision: C
Before you can use the information in this chapter you must be familiar with
Details
Header
Data block 1
Data block 2
Data block 3
Data block 4
Data block 5
Data block 6
Data block 7
Start Size
Reg
(Hex)
8000 1
8001 1
8004 3
8007 1
127
Start Reg Size
(Hex)
8000 16
8010 83
8070 83
80D0 83
8130 83
8190 83
81F0 83
8250 83
Description
Write value 1 to this register to load the
next block of values and timestamp
Write to this register to choose an entry
number to start reading from
Write to this register to choose a date/time R/W
to start reading from
Write to this register to choose the
direction of reading
Read/
write
R/W
R/W
R/W
A43/A44
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