2
Overview of the CompoNet Network
Section 1-1
1-1
Overview of the CompoNet Network
CompoNet is a field network designed for communications between the input
and output components on the shop floor and a personal computer (or PC) or
a PLC. CompoNet requires less wiring labor but provides high maintainability.
The PC and the CompoNet Slave Unit exchange input and/or output data
cyclically through a CompoNet Master Board.
By using explicit messages, users can read data from the CompoNet Slave
Unit or write data into it.
Here are the main features of CompoNet:
High-Speed
Communications of
Multiple Nodes
CompoNet can provide remote I/O communications for multiple nodes as
many as maximum 2,560 points in a high speed such as 1000 points per
millisecond when the data rate is 4 Mbps*. This allows integration of
conventional system configuration with basic I/O Units into a CompoNet
network.
*
The data rate of 4 Mbps does not support T-branch connection. Thus any
Slave Unit with pre-attached cables is not usable.
Greater Flexibility with
Repeater Units
Repeater Units can expand a network installation in the following ways:
• Extending the Communications cable,
• Increasing the number of connected nodes,
• Creating a branch connection from the trunk line, and
• Converting cable types.
Repeater Units can be used to expand the trunk line for up to two layers. The
lines downstream from the Repeater Units are called sub-trunk lines. The
maximum number of connectable Repeater Units is 64 per Master Board and
32 per trunk line.
Note
The power to the sub-trunk lines must be supplied from the Repeater Units.
Slave Unit
CompoNet Master Board
Terminating
Resistor
Terminating
Resistor
Terminating Resistor
Repeater
Unit
Repeater Unit
Slave Unit
Slave Unit
Slave Unit
Summary of Contents for 3G8F7-CRM21
Page 4: ...iv...
Page 10: ...x TABLE OF CONTENTS...
Page 46: ...26 Connecting the Communications Power Supply Cables Section 2 4...
Page 74: ...54 Board Hardware Error Notification Section 4 8...
Page 173: ...153 APPENDIX D Sample Program D 1 Sample Program 154...
Page 230: ...210 Wiring for Power Supply Section E 5...
Page 234: ...214 Index...
Page 236: ...216 Revision History...
Page 237: ......