Table 20. Index Table; Table 21. Process Data Slave; Master (Max. 22 Bytes); Table 22. Process Data Master - Eaton PowerXL Series Communications Manual

Modbus RTU On-Board Communications
Modbus registers
The variables and fault codes as well as the parameters can
be read and written from Modbus. The parameter addresses
are determined in the application. Every parameter and
actual value have been given an ID number in the application.
The ID numbering of the parameter as well as the parameter
ranges and steps can be found in the application manual
in question. The parameter value shall be given without
decimals.
All values can be read with function codes 3 and 4 (all
registers are 3X and 4X reference). Modbus registers are
mapped to drive IDs as follows.

Table 20. Index table

ID Modbus register
1–98 40001–40098
(30001–30098)
100 40099 (30099)
101–1999 40101–41999
(30101–31999)
2004–2011 42004–42011
(32004–32011)
2104–2111 42104–42111
(32104–32111)
12
POWERXL SERIES VFD MN040010EN—June 2018 www.eaton.com
Group R/W
Actual Values 1/1
Fault Code 1/1
Parameters 1/1
Process Data In 1/1
Process Data Out 1/1
Process data
The process data fields are used to control the drive (e.g.,
Run, Stop, Reference, Fault Reset) and to quickly read actual
values (e.g., Output frequency, Output current, Fault code).
The fields are structured as follows.

Table 21. Process data slave

ID Modbus register
2101 32101, 42101
2102 32102, 42102
2103 32103, 42103
2104 32104, 42104
2105 32105, 42105
2106 32106, 42106
2107 32107, 42107
2108 32108, 42108
2109 32109, 42109
2110 32110, 42110
2111 32111, 42111

Table 22. Process data master

ID Modbus register
2001 32001, 42001
2002 32002, 42002
2003 32003, 42003
2004 32004, 42004
2005 32005, 42005
2006 32006, 42006
2007 32007, 42007
2008 32008, 42008
2009 32009, 42009
2010 32010, 42010
2011 32011, 42011
The use of process data depends on the application. In a
typical situation, the device is started and stopped with the
Control Word (CW) written by the Master and the Rotating
speed is set with Reference (REF). With PD1–PD8 the
device can be given other reference values (e.g., Torque
reference). With the Status Word (SW) read by the Master,
the status of the device can be seen. Actual Value (ACT) and
PD1–PD8 show the other actual values.

master (max. 22 bytes)

Group Range/Type
FB Status Word Binary coded
FB General Status Word Binary coded
FB Actual Speed 0–100.00%
FB Process Data Out 1
FB Process Data Out 2
FB Process Data Out 3
FB Process Data Out 4
FB Process Data Out 5
FB Process Data Out 6
FB Process Data Out 7
FB Process Data Out 8

slave (max. 22 bytes)

Group Range/Type
FB Control Word Binary coded
FB General Control Word Binary coded
FB Speed Reference 0–100.00% Hz
FB Process Data In 1 Integer 16
FB Process Data In 2 Integer 16
FB Process Data In 3 Integer 16
FB Process Data In 4 Integer 16
FB Process Data In 5 Integer 16
FB Process Data In 6 Integer 16
FB Process Data In 7 Integer 16
FB Process Data In 8 Integer 16