Eaton Power Xpert C445 User Manual page 310

Appendix C—Optional Communication Cards
Module 11: Cyclic Module 11
This profile includes 8 input bytes. 4 word parameters
may be selected for the input data. The input data is
selectable under the module in the PROFIBUS
master's programming software.
Module 12: Cyclic Module 12
This profile includes 16 input bytes. 8 word
parameters may be selected for the input data. The
input data is selectable under the module in the
PROFIBUS master's programming software.
Module 13: Cyclic Module 13
This profile includes 32 input bytes and 4 output bytes.
The input data is selectable under the cyclic module in
the PROFIBUS master's programming software. The
output data is under the "Slave" module, after the
Configuration Parameters.
Module 14: Cyclic Module 14
This profile includes 2 output bytes. 1 word parameter
may be selected. This output data is selectable under
the "Slave module in the PROFIBUS master's
programming software.
Module 15: Cyclic Module 15
This profile includes 4 output bytes. 2 word
parameters may be selected. This output data is
selectable under the "Slave module in the PROFIBUS
master's programming software.
Module 16: Cyclic Module 16
This profile includes 32 input bytes. 16 word parameters
may be selected along with 16 input bytes where
8 word parameters may be selected. The input data is
selectable under the cyclic module in the PROFIBUS
master's programming software and the output data is
under the "Slave" module itself, after the
Configuration Parameters.
Module 17: Cyclic Module 17
This profile includes 64 input bytes. 32 word parameters
may be selected along with 32 input bytes where
16 word parameters may be selected. The input data
is selectable under the cyclic module in the PROFIBUS
master's programming software and the output data is
under the "Slave" module itself, after the
Configuration Parameters.
296 Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com
Acyclic PROFIBUS Messages
The C445 supports the acyclic messages added with the
DPV1 version of PROFIBUS. All parameters in the C445 are
mapped using Modbus Register addresses. This register
map can be found in Appendix D. Modbus commands and
registers are used to read and write parameters for the C445
via acyclic PROFIBUS messages.
Reading Data from a C445 via Acyclic Messages
1. An acyclic write message must be sent by the
master containing a Modbus read command.
2. An acyclic read message must be sent by the
master to obtain the data.
Reading data:
1. Send an acyclic write message per the following:
Slot number (always 0 for the C445)
Index: 45
Data length including the Modbus command
in bytes
Data Field:
a. 03 Modbus Read command (1 byte)
b. Two bytes representing the Modbus register
address in hexadecimal or decimal depending
on what the master requires. (2 bytes)
c. Length of data to be read. This is the number
of 16-bit registers being requested.
2. Send acyclic read message to obtain the requested
data per the following:
Slot number (always 0 for the C445)
Index: 45
Data Length in bytes (example, if 1 register is being
read, this length would be 2)
Writing data:
Only one step is needed to write data as follows:
Slot number (always 0 for the C445)
Index 45
Length in bytes, including the Modbus
command in bytes
Data Field:
a. 06 Modbus single register write command
(1 byte)
b. Two bytes representing the Modbus
register address in hexadecimal or
decimal depending on what the master
requires. (2 bytes)
c. The two bytes (1 word) of data