ABB A43

Communication with Modbus
2CMC48001M0201 141 A43/A44
Revision: C User Manual
Data block
Structure of
the data block
The data block contains the load profile entries, consisting of timestamp, status
and value. There is space for up to 15 entries in the data block. The load profile
is read by repeatedly loading new values into the data block in backward or
forward direction in time.
In case of backwards reading the entries in the data block are placed in ascending
entry number order, i.e. going towards older entries. In case of forward reading
the entries are placed in descending entry number order, i.e. going towards more
recent entries.
The following table describes the structure of the data block:
Entry
Contents
Start
Size
Description
position
Reg
(Hex)
1
Timestamp
8720
3
Date and time when the entry was
stored. (Date/Time format)
1
Status
8723
1
The status for this entry
1
Value
8724
4
The value for this entry
...
...
15
Timestamp
8789
3
Date and time when the entry was
stored. (Date/Time format)
15
Status
8792
1
The status for this entry
15
Value
8793
4
The value for this entry
Status register The status register holds status information for a load profile entry.
The following table describes the meaning of the individual bits in the
status register:
Bit
Contents
Description
number
0
Entry available
This bit is set if the value register
contains a valid value
1
Restart
This bit is set if a restart occured during
the interval
2
Interval long
This bit is set if the interval was longer
than the configured interval. This
happens if the date and time have been
adjusted backwards in time.