Serial Bridge Profile: Master And Slave Connected To Digi Ports; When To Use; Configuration Options - Digi TS 4 MEI User Manual

Serial Bridge Profile: Master and Slave Connected to Digi Ports

When to Use

Configuration Options

Chapter 4 Configuring Industrial Automation (IA)
Serial Bridge Profile: Master and Slave Connected to Digi Ports
Use this profile to connect a protocol master to the serial port of one device
server and the protocol slave (or slaves) to the serial port of another device
server. This profile, which is often called a serial bridge, is applicable to
environments that use most IA serial port protocols and to multi-master
environments as well. The network is completely transparent to the serial
devices, which means they do not have to be reconfigured.
The serial port connections must be configured to meet the requirements of
the attached device, which can be Modbus ASCII, Modbus RTU, DF1 Full-
Duplex, DF1 Half-Duplex, Omron Hostlink, Omron FINS, and Omron
CompoWay/F. It can also be a serial port protocol that meets Digi's
definition of a "user defined" protocol, that is, one that has fixed header and
trailer strings that bound all message packets and where each protocol
request is followed by a single response.
For the network connection, Digi recommends TCP sockets, which works
regardless of the serial port protocol specified and provides an efficient and
reliable network service. Another option is UDP sockets, which also works
with all the serial port protocols, although it lacks TCP socket reliability. For
Modbus devices, Modbus/TCP is an option, and for DF1 Full-Duplex
devices, Allen Bradley Ethernet and Ethernet/IP are options.
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