YOKOGAWA UTAdvanced Series, User Manual

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1-3
IM 05P07A01-01EN
Overview
1 1.3 Ethernet Communication (for UTAdvanced with
Ethernet Communication)
The UT55A/UT35A with Ethernet communication can be connected to an IEEE802.3-
compliant network (10BASE-T/100BASE-TX) and are capable of exchanging data with
host computers, such as personal computers or PLCs (sequencers), using the MODBUS/
TCP protocol.
The UT55A/UT35A also has an RS-485 communication interface and the Ethernet-serial
gateway function that relays the communication data received via network to the serial
communication terminals. With this function, other serial communication devices not
equipped with a network function can be connected to a network.
1.3.1 Communication Specifications
Ethernet Communication Interface Specification (the slave devices)
Communication specifications
Standard Ethernet IEEE802.3-compliant
Interface RJ45 (10BASE-T/100BASE-TX)
Access control CSMA/CD
Transmission speed 10 Mbps/100 Mbps
Maximum segment length 100 m (Note 1)
Maximum connecting configuration Cascade Max. 4 stages (10BASE-T)
Max. 2 stages (100BASE-TX) (Note 2)
Communication method Modbus/TCP
Data type Binary
Maximum number of connections 2
Maximum number of transactions 1 (Note 3)
Port No. 502 (factory default), can be selected within the range of
1024 to 65535
Note 1: Distance from hub to UT75A/UT55A/UT35A
Note 2: Number of cascade connections on hub
Note 3: Per a connection
RS-485 Communication Interface Specification (the master devices for serial
gateway function)
Communication specifications
Communication interface RS-485
Communication method 2-wire type half-duplex, asynchronous operation, non-procedural
Connection method 1:n multi-drop method (n = max. 31)
Communication distance Max. 1200 m
Baud rate 9600, 19200, 38400 bps
Protocol Modbus/RTU
Start bit 1 bit
Data length 8 bits
Parity bit NONE (none), EVEN (even), ODD (odd)
Stop bit 1 bit
Note
If you want to connect the UT75A/UT55A/UT35A/UP55A/UP35A to a network, you need to
ensure consistency with the baud rate, connector, and the like. For details, consult with the
administrator of the network to which to connect the UT75A/UT55A/UT35A/UP55A/UP35A.