ABB A43 User Manual page 141

Communication with Modbus
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.
Structure of The following table describes the structure of the data block:
the data block
Entry
position
1
1
1
...
...
15
15
15
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
number
0
1
2
2CMC48001M0201
Revision: C
Contents Start Size
Reg
(Hex)
Timestamp 8720 3
Status 8723 1
Value 8724 4
Timestamp 8789 3
Status 8792 1
Value 8793 4
Contents Description
Entry available This bit is set if the value register
contains a valid value
Restart This bit is set if a restart occured during
the interval
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.
141
Description
Date and time when the entry was
stored. (Date/Time format)
The status for this entry
The value for this entry
Date and time when the entry was
stored. (Date/Time format)
The status for this entry
The value for this entry
A43/A44
User Manual