ABB A43, User Manual

Page: 146 / 295

Communication with Modbus
A43/A44 146
2CMC48001M0201
User Manual Revision: C
Level
configuration
registers
Note
–
Step 1 initiates the readout procedure and can NOT be left out, even if
the number of quantities used is already known.
Note
–
The Quantity number register can optionally be read together with the
Quantity registers in step 2. The Quantity number register holds the current quantity
number, starting from 1 after reading the Number of quantities register. It is
incremented every time the Quantity registers are read.
The following table describes the group of registers for configuring the
number of levels for all quantities stored in demand:
Function Start Size Description Read/
Reg write
(Hex)
Level quantity 8C35 3 OBIS code for the quantity R/W
Number of levels 8C38 1 Number of levels to store for the quantity R/W
Write level
configuration
Read level
configuration
Follow the steps in the table below to configure the number of levels for each
of the quantities stored in demand:
Step Action
1 Write the OBIS code for the first quantity to the Level quantity registers.
2 Write the number of levels to use for the quantity chosen in step 1 to the
Number of levels register. Allowed values are 1-3.
3 Repeat step 1 and 2 for all quantities used in demand.
Note
–
It is assumed that the set of quantities, i.e. the OBIS codes, to store in demand
has already been configured by performing the steps under Write quantity configura-
tion. Writing an OBIS code in step 1 above does NOT add it to the set of quantities to
store.
Follow the steps in the table below to read the current configuration of levels
for all quantities stored in demand:
Step Action
1 Write the OBIS code for the first quantity to the Level quantity registers.
2 Read the number of levels used for the quantity chosen in step 1 from the
Number of levels register.
3 Repeat step 1 and 2 for all quantities used in demand.
Note
–
It is assumed that the set of quantities, i.e. the OBIS codes, stored in
demand is already known. Otherwise the steps under Read quantity configuration
must be performed first to find these.