YOKOGAWA UTAdvanced Series, User Manual

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3-1
IM 05P07A01-01EN
Description of RS-485 Communication (for UT
Advanced with RS-485 Communication)
3
3.1 Modbus Communication
3.1.1 Overview
The UTAdvanced can communicate with devices such as PCs, PLCs (sequencer), and
touch panels by using Modbus communication. With Modbus communication, these
devices can exchange dada with UTAdvanced by reading/writing the internal registers (D
registers and I relays) of the UTAdvanced.
► D registers and I relays:
Chapter 6 Functions and Applications of D Registers (for UT55A/UT52A/UP55A) or Chapter 7
Functions and Applications of I Relays (for UT55A/UT52A/UP55A) in this manual
Chapter 8 Functions and Applications of D Registers (for UT35A/UT32A/UT32A-D/UP35A/
UP32A) or Chapter 9 Functions and Applications of I Relays (for UT35A/UT32A/UT32A-D/
UP35A/UP32A) in this manual
Chapter 10 Functions and Applications of D Registers (for UM33A) or Chapter 11 Functions and
Applications of I Relays (for UM33A) in this manual
Chapter 12 Functions and Applications of D Registers (for UT35A-L) or Chapter 13 Functions
and Applications of I Relays (for UT35A-L) in this manual
Chapter 14 Functions and Applications of D Registers (for UT75A) or Chapter 15 Functions and
Applications of I Relays (for UT75A) in this manual
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/UT32A/UT32A-D/UP35A/UP32A/UM33A 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 3 Description of RS-485 Communication (for UTAdvanced with RS-485 Communication)