YASKAWA SI-EM3D, Руководство по установке

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7 Modbus TCP/IP Messaging
YASKAWA TOEP C730600 0EA Modbus TCP/IP Installation Manual 53
7 Modbus TCP/IP Messaging
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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 7.1 Supported Modbus TCP/IP Commands
Function Code
(Hex.)
Name
03 Read Multiple Registers
06 Write Single Register
10 Write Multiple Registers
17 Read/Write Multiple Registers
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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.
As shown in Table 7.2 , all of the drive command registers have been mapped to this high
speed access area (Modbus TCP/IP registers 01 (Hex.) to 01F (Hex.)). In addition, the
monitors shown in
Table 7.3 are mapped for high speed access.
You can read and write command data.
Note:
Set bits that you do not use to 0. Do not write to reserved registers.
Table 7.2 Command Register Data
Register Number
(Hex.)
Description
0000 Reserved
0001 Operation Commands and Multi-function Inputs