Setting Up Embedded Fieldbus Interface; Accessing Inverter Parameters; Data I/O Registers, 0-68; Data I/O Registers 0 - ABB PRO-33.0-TL Service Manual

102 Fieldbus interfaces

Setting up embedded fieldbus interface

Set up the inverter for embedded fieldbus communication from the communication menu
or with the parameters in the group
default. Set a unique node address for each inverter with the parameter
address. Check also other communication settings including baud rate and parity. The new
settings will take effect once refreshed with the parameter
Parameter 158.01 Protocol enable
Terminal X2.

Accessing inverter parameters

Configuration parameters of the PRO-33.0-TL inverter can be accessed through Modbus
holding registers. Holding registers are 16-bit, read/write registers. The table below
describes the holding registers of the inverter. Registers 0 through 68 are described in
detail in a separate table. Registers 100 through 65535 are accessed using an addressing
scheme defined by parameter
Start address
0
69
89
100

Data I/O registers, 0-68


The Data I/O registers are Modbus RTU holding registers that can be programmed to give
access to any of the internal configuration parameters of the inverter. Parameters can both
be read and written to by accessing these registers, both 16-bit or 32-bit formats are
supported. The Data I/O registers give the user the possibility to group a number of
internal configuration parameters, with mixed 16/32 bit length, into a contiguous array of
registers that can be read in one operation by the Modbus master.
The Modbus data I/O registers are programmed via configuration parameters in parameter
group 158, indexes 101 ... 169. Most of the Data I/O registers have default configurations
but these can easily be changed when/if needed.
The Data I/O registers have, by default, been set up to mirror internal configuration
parameters as described in the tables below.
Data I/O registers 0 ... 2 programmed for inverter control command:
Holding FbEq (16b/32b),
register scaling
0 16b, 1 = 1
1 16b, 1 = 1
2 16b, 1 = 1
158 Embedded
is read only. For options, see parameter
158.33 Addressing
End address
68
88
99
65535
Description
Inverter operation
External power limit
User Qref
fieldbus. Modbus RTU is enabled by
158.06 Comm
mode.
Description
Data I/O
Not used
Modbus error codes
Read/write registers
Mirrored inverter Config
parameter Parameter
189.01 158.101
130.75 158.102
124.01 158.103
158.03 Node
control.
149.21
Name
Data I/O 1
Data I/O 2
Data I/O 3