Reading Load Profile - ABB A43 User Manual

Communication with Modbus
Bit
number
3
4
5
6-7
Note –

9.9.1 Reading Load profile

Readout of load profile is controlled by the Date/Time register. After writing to
General
the Date/Time register, the load profile entries are available in the registers of the
data block. To get the next set of entries the Get next entry register is used.
Follow the steps in the table below to read the 15 most recent load profile entries:
Read the 15 most
recent entries
Step
1
2
3
Read forward or Follow the steps in the table below to read forward or backwards in time from a
backwards from specified date/time:
a specified date/
Step
time
1
2
3
4
5
Note –
A43/A44
User Manual
Contents Description
Interval short This bit is set if the interval was shorter
than the configured interval. This
happens if the date and time have been
adjusted forward in time.
Time change This bit is set if an adjustment to the date
and time was made during the interval
Bad value This bit is set if the value register
contains a doubtful value
Not used
Bit 0 in the table above refers to the least significant bit in the register.
Action
Write a date and time in the future to the Date/Time registers, e.g. 2099-01-01
00:00:00.
Write the value 0 to the Direction register.
Read the data block.
Action
Write a date and time to the Date/Time registers.
Write to the Direction register. Writing value 0 means backwards and value 1
means forward.
Read data block.
Write the value 1 to the Get next entry register.
Repeat steps 3 and 4 until there are no more entries stored. When all entries
have been read, all registers in the data block are set to 0xFFFF.
The Date/time registers are reset to 0xFFFF after a restart.
142 2CMC48001M0201
Revision: C