YOKOGAWA DTSXL, User Manual, Page: 105 / 289

< PART – B Software >
B-22
IM 39J06B40-01EN 14th Edition: May 30, 2022
B5. Communication Functions
The DTSX3000 is equipped with Ethernet and serial communication ports, which can be
used for external communications.
B5.1. Serial Communication
The DTSX3000 has three serial communication ports, namely COM1, COM2 and
COM3, which can be used for Modbus communications, as well as maintenance
communications.
B5.1.1. Modbus
The DTSX3000 runs as a Modbus slave device. You can define the slave address and
communication mode for Modbus communications. A Modbus master device can
connect to a DTSX3000 running as a Modbus slave device to read and write its internal
registers.
The DTSX3000 provides internal registers for measurement control, measurement
condition configuration, as well as storage of channel measurement data (in tag format)
and alarm information data.
Any of the COM1 and COM2 communication ports can be used for Modbus
communications.
SEE ALSO
- For details on Modbus communications, see the “DTSX3000 Communications Guide.” (IM
39J06B40-02EN)
- For details on Modbus communications related settings, see Subsection B6.5.3, “Modbus Serial
Related Settings.”
B5.1.2. RS232 Connection
The RS232 connection is used for maintenance. The COM3 serial port is dedicated for
maintenance use and cannot be used for general communications.
B5.2. Ethernet Communications
The DTSX3000 supports the SSH, SFTP, SCP, HTTP(S) and Modbus/TCP protocols.
B5.2.1. Login Function
Only pre-registered users are allowed access when communicating with the DTSX3000.
Up to ten users can be registered.
Three user authority levels are available.
User Type User Authority Level Displayed Text
Administrator Configuration administrator Admin
User
Data creator User:ReadWrite
Data reviewer User:ReadOnly
The access authority of each of these user types are described below for different
protocols.
SEE ALSO
For details on how to add a user, see Subsection B6.4.3, “User Management (User).”