CompoNet Specifications

Item

Specification

Types of communications
 

Remote I/O communications (programless, constant sharing of data with Slave Units) and message communications (explicit message communications as required with Slave Units and FINS message communications as required with PLCs)

Baud rate

4 Mbps, 3 Mbps, 1.5 Mbps, 93.75 kbps

Modulation

Base-band

Coding

Manchester code

Error control

Manchester code rules, CRC

Communications media

The following media can be used.
• Round cable I
• Round cable II
• Flat Cable I
• Flat Cable II
Note: Round cable I, round cable II, Flat Cable I, and Flat Cable II are all different types of cable. To use more than one type of cable at a time, Repeater Units must be used to separate them on trunk lines and subtrunk lines.

Communications distance and wiring

Refer to Cable Types, Baud Rates, and Maximum Distances in the Master Unit Operation Manual.

Connectable Master Units

CompoNet Master Units

Connectable Slave Units

CompoNet Slave Units

Maximum I/O capacity

Word Slave Units: 1,024 inputs and 1,024 outputs (2,048 I/O points total)
Bit Slave Units: 256 inputs and 256 outputs (512 I/O points total)

Maximum number of nodes

Word Slave Units: 64 input nodes and 64 output nodes
Bit Slave Units: 128 input nodes and 128 output nodes
Repeater Units: 64 nodes

Bits allocated per node address

Word Slave Units: 16 bits
Bit Slave Units: 2 bits

Maximum number of nodes per trunk line or sub-trunk line

32 nodes (including Repeater Units)

Applicable node addresses

Word Slave Units: IN0 to IN63 and OUT0 to OUT63
Bit Slave Units: IN0 to IN127 and OUT0 to OUT127
Repeater Units: 0 to 63

Repeater Unit application conditions

Up to 64 Repeater Units can be connected per network (i.e., per Master Unit). Up to 32 Repeater Units can be
connected per trunk line or per sub-trunk line. When Repeater Units are connected in series from the Master
Unit, up to two extra segment layers can be created (i.e., up to 2 Repeater Units are allowed between a Slave
Unit and the Master Unit).

Signal lines

Two lines: BDH (communications data high) and BDL (communications data low)

Power lines

Two lines: BS+ and BS− (power for communications and internal Slave Unit circuits)
• Power is supplied from the Master Unit or Repeater Units.

Connection forms

Standard or Sheathed Flat Cable at baud rate of 93.75 kbits/s: No restrictions
Other cables or baud rates: Trunk line and branch lines