YOKOGAWA UTAdvanced Series, User Manual

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4-1
IM 05P07A01-01EN
Description of Ethernet Communication (Modbus/TCP) (for UT
Advanced with Ethernet Communication)
4
4.1 Overview
The Modbus/TCP is a communication protocol used for performing communication with
a general-purpose PC, PLC (sequencer), touch panel, or other device using TCP/IP
protocol via Ethernet or other network.
Internal registers on UT75A/UT55A/UT35A/UP55A/UP35A are read and written, and data
transactions performed with connected devices via this communication protocol.
The UT75A/UT55A/UT35A/UP55A/UP35A can be connected to IEEE802.3-compliant
networks (10BASE-T/100BASE-TX), and communication with the Modbus/TCP protocol
is generally performed on port No. 502. (The port No. can be changed.)
Moreover, the UT75A/U55A/UT35A/UP55A/UP35A operates as an Ethernet serial
gateway. The host computer can reads/writes data from/to other devices equipped with
serial communication function using the MODBUS/TCP protocol via the UT75A/UT55A/
UT35A/UP55A/UP35A.
► D registers: Chapter 6 Functions and Applications of D Registers (for UT55A/UT52A/UP55A)
Chapter 8 Functions and Applications of D Registers (for UT35A/UT32A/UT32A-D/
UP35A/UP32A)
Chapter 12 Functions and Applications of D Registers (for UT35A-L)
Chapter 14 Functions and Applications of D Registers (for UT75A)
► Process Data High-speed Response Function: 4.6 Process Data High-speed Response
Function
CAUTION
The parameters of the UTAdvanced are placed in the D registers.
If the settings of some parameters are changed, the related parameters may be
initialized.
When changing the parameter setting, configure (write) the settings in the following
orders.
1. Setup parameters
1-1 Control mode parameter (CTLM) *1
1-2 Input -related parameters *2
1-3 Output-related parameters
1-4 Other necessary parameters
2. Operation parameters
2-1 Alarm type parameters
2-2 Alarm setpoint parameters
2-3 Other necessary parameters
*1: If the setting of CTLM (control mode) is changed, the related parameters will be initialized.
UT35A/UP35A does not have the parameter CTLM (Control mode.)
*2: If the setting of IN (input type) is changed, the parameters related to ranges or scales such
as target setpoint etc. will be initialized.
Chapter 4 Description of Ethernet Communication (Modbus/TCP) (for UTAdvanced with Ethernet Communication)