Yamaha DRCX, ERCX, SRCD, SRCX 2-7 Using TELNET

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CHAPTER2 Ethernet Unit

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 communica-

tion commands.

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

TELNET and RS-232C both perform the same processing. However, they use different

communication formats. This means that one format might not match your own particu-

lar 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

communications.

• Allows remote communications since it connects between separate systems.

• Basically not usable for real-time processing since real-time operation is not guaran-

teed.

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 opera-

tion. 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 termi-

nal in the parallel I/O of the controller to ensure quick and effective emergency stops.

Contents

Main Page INTRODUCTION Page Contents Chapter 1 Cautions To Ensure Safety................................... 1 Chapter 2 Ethernet Unit.......................................................... 7 Page Page 1-1 Basic safety points 1-2 System design safety points 1-3 Installation and wiring safety points 1-4 Start-up and maintenance safety points 1-5 Precautions when disposing of the unit 1-6 Warranty Page Page 2-1 Ethernet unit features 2-2 How data is exchanged 2-3 How to connect to Ethernet 2-4 Making system settings for the controller (server) 2-4-1 Validating the Ethernet unit 2-4-2 Setting the IP address Page 2-4-3 Setting the subnet mask ! CAUTION 2-4-4 Setting the gateway Page 2-5 Making the PC settings (client) 2-5-1 Setting the TCP/IP protocol Page 2-6 Checking the connection with ping 2-7 Using TELNET 2-7-1 Difference between TELNET and RS-232C communications 2-8 TELNET dedicated parameters 2-8-1 TELNET dedicated parameters: Setup method 1 2-8-2 TELNET dedicated parameters: Setup method 2 2-8-3 Description of TELNET dedicated parameters Page 2-9 TELENET communication commands 2-9-1 Communication command specifications 2-9-2 Ethernet unit control commands 2-9-3 Robot control commands 2-10 Making a connection with TELNET.EXE Page 2-11 Other operating tasks 2-11-1 Displaying the MAC address 2-11-2 Displaying the version of the Ethernet unit 2-12 Message List 2-12-1 Error messages 2-12-2 Telnet message list 2-13 Troubleshooting Page Page 2-14 Specifications 2-14-1 Ethernet unit specifications ! 2-14-2 Modular connector The pin layout for the modular connector used in the Ethernet unit is shown below. 2-14-3 UTP (STP) cable 2-15 Supplement 2-15-1 Typical network systems Page Example 3 In this example, the control PC and the controllers are separated from each other. Page Use of a firewall (defense mechanism to keep out intruders) is recommended to maintain security. 2-15-2 Description of terminology Page Page User's Manual network board Revision record