User`s guide
42 Chapter 4 IA Profiles and Procedures
• "Other Serial Port Protocol Profile: Serial-Connected Slave" on page
48
• "Other Serial Port Protocol Profile: Serial-Connected Master" on
page 49
Procedures
• "Configuring a Serial-Connected Slave: Generic Procedure" on
page 49
• "Configuring a Serial-Connected Master: Generic Procedure" on
page 50
• "Configuring a Serial-Connected Master: TCP/UDP Sockets" on
page 50
• "Configuring a Serial-Connected Slave: Other IA Protocol" on page
51
• "Configuring a Serial-Connected Master: Other IA Protocol" on page
51
• "Setting Up COM Port Redirection" on page 52
Key Terms in This Chapter
Use this section to familiarize yourself with the terms used in this chapter.
Com Port Redirection
a method of redirecting the serial data generated by a PC-based master
to a slave connected to a port on a network-based device server. In this
scheme, the master “thinks” that it is communicating with a device
connected to a serial port on the PC system when, in fact, the data is
encapsulated in network packets and transported across the network to
a device connected to a serial port on the Digi device server. Many
applications, written to support serial communication only, require this
service in order to communicate over the Ethernet.
IA
abbreviation for industrial automation
master (or protocol master)
the host or IA device that initiates all communication with a protocol slave
multi-master
any configuration in which more than one master simultaneously
communicates with a slave
protocol request
a message generated by the master and sent to the slave that requests
information or issues a command
protocol response
a message generated by the slave in response to a protocol request from
the master
slave (or protocol slave)
the device that responds to requests from the master