Using Telnet; Difference Between Telnet And Rs-232C Communications - Yamaha RCX series User Manual

2-7 Using TELNET

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2-7 Using TELNET
Communicating by TELNET (remote operation) allows loading and editing point or program data
and operating the robot just the same if connected through an RS-232C port.
Commands are easy to understand because they are identical to RS-232C communication commands.

2-7-1 Difference between TELNET and RS-232C communications

TELNET and RS-232C both perform the same processing. However, they use different communica-
tion formats. This means that one format might not match your own particular system needs or
objectives, so you should get a good understanding of their different features before incorporating
them into your system.
TELNET
• Easily connects to different types of systems. Can handle one versus multiple device commu-
nications.
• Allows remote communications since it connects between separate systems.
• Basically not usable for real-time processing since real-time operation is not guaranteed.
RS-232C
• Basically handles one party to one party (or device) communications.
• Designed for communications between devices in close proximity.
• Operates largely to real-time specifications.
Ethernet communications protocol specifications do not guarantee real-time operation. So
relying only on the Ethernet in situations such as robot emergency stop can be extremely
dangerous. Install safety interlock circuits using the emergency stop terminal in the
SAFETY connector of the robot controller to ensure quick and effective emergency stops.