Communications Overview; Rs-485 Communication Specifications; Ethernet Communication Specifications - YOKOGAWA PR300 User Manual
Power and energy meter communication interface (rs-485 and ethernet communications)
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Also See for PR300:
- User manual (76 pages) ,
- Startup manual (2 pages) ,
- Initial setup (2 pages)
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1.
Communications Overview
1.1
RS-485 Communication Specifications
Protocols available for RS-485 communication interfaces include the PC link com-
munication protocol and the Modbus communication protocol.
Table 1.1 RS-485 Communication Specifications
Communication Hardware
Compliant Standard
Protocol Specification
Baud Rate
Maximum Communication Distance
Maximum Number of
Connectable Devices
Transmission Method
Synchronization
Communication Method
Communication Cable
1.2
Ethernet Communication Specifications
Protocols available for Ethernet communication interfaces include the Modbus/TCP
communication protocol.
Table 1.2 Ethernet Communication Specifications
Communication Hardware
Compliant Standard
Access Control
Protocol Specification
Baud Rate
Maximum Segment Length
Maximum Connecting
Configuration
Communication System
Data Format
Maximum Number of
Connections
*1: Distance between the hub and module.
*2: The number of hubs connectable in cascade configuration.
Item
2-wire system RS-485
EIA RS-485
PC Link Communication with
and without checksum
Modbus Communication
(ASCII and RTU modes)
PR201 original communication
2400 bps, 9600 bps, 19200 bps
1200 m
31
2-wire, half-duplex
Start-stop synchronization
Non-procedural
Shielded twisted pair cable
(AWG24-equivalent size)
Item
10BASE-T/100BASE-TX
Ethernet IEEE802.3
CSMA/CD
Modbus communication (Port No.: 502)
10 Mbps/100 Mbps
100 m *1
Cascade max. 4 levels (for 10BASE-T)
max. 2 levels (for 100BASE-TX) *2
TCP/IP
Binary
1
<1. Communications Overview >
Details
A PC installed with a driver for PC link
communication and SCADA software,
PLC (FA-M3 UT link module), etc.
A PC installed with a Modbus driver
and SCADA software,
a Modbus-compatible PLC, etc.
Personal computer etc. with SCADA
software installed to support PR201
original communication protocol
Details
IM 77C01E01-10E
1-1
Connected Device
Connected Device
Ethernet-equipped PC etc.
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