Yaskawa Modbus TCP/IP Installation - Manual (Page 35)

YASKAWA ELECTRIC TOBP C730600 57B 1000-Series Option SI-EM3 Installation Manual 35
7 Modbus TCP/IP Messaging
7 Modbus TCP/IP Messaging
◆
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.
■ Supported Modbus TCP/IP Commands
Table 7 Supported Modbus TCP/IP Commands
■ 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.
■ 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 8 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
Modbus_IM_E_conditional.fm 35 ページ ２０１２年１０月３１日 水曜日 午後１時４５分