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YASKAWA ELECTRIC
TOBP C730600 59A V1000 Option Modbus TCP/IP Installation Manual
7 Modbus TCP/IP Messaging
7
Modbus TCP/IP Messaging
u
Modbus TCP/IP Overview
The Modbus TCP/IP protocol is essentially the Modbus protocol over an Modbus TCP/IP
network. A master controller (typically a PLC) sends commands to slave devices, which
then perform the specified functions and send a response to the master. The drive using the
option has slave functionality.
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Supported Modbus TCP/IP Commands
Table 9 Supported Modbus TCP/IP Commands
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Drive Modbus TCP/IP Option Registers
All of the command registers, monitor registers, and parameters documented in the drive
Technical Manual are accessible via the option.
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High Speed Access Drive Modbus TCP/IP Option Registers
Many of the registers required for control have been specially mapped to provide higher
speed access to increase network performance. Use these registers for the best response
times.
All of the drive command registers have been mapped to this high speed access area
(Modbus TCP/IP registers 01H to 01FH). In addition, the monitors shown in
Table 10
are
mapped for high speed access.
Function Code
Function Name
03H
Read Multiple Registers
06H
Write Single Register
10H
Write Multiple Registers
17H
Read/Write Multiple Registers
