Componet Network Specifications - Omron CJ Series Operation Manual

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CompoNet Network Specifications

Item
Communications method
Types of communications
Baud rate
Modulation
Coding
Error control
Communications media
Communications distance and wiring Refer to 1-2-1 Cable Types, Maximum Distances, and Number of Slave
Connectable Master Units
Connectable Slave Units
Maximum I/O capacity
Maximum number of nodes
Bits allocated per node address
Maximum number of nodes per seg-
ment
Applicable node addresses
Repeater Unit application conditions
Signal lines
Power lines
Communications power supply volt-
age
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
CompoNet protocol
Remote I/O communications (programless, constant sharing of data with
Slave Units) and message communications (explicit message communi-
cations)
4 Mbps (*1), 3 Mbps, 1.5 Mbps, 93.75 kbps
*1 A baud rate of 4 Mbps is not supported for branch lines and thus can-
not be used for Slave Units with Cables.
Base-band
Manchester code
Manchester code rules, CRC
The following cables can be used.
• Round Cable I (VCTF 2-conductor cable, JIS C3306)
• Round Cable II (VCTF 4-conductor cable, JIS C3306)
• Flat Cable I (DCA4-4F10 Standard Flat Cable)
• Flat Cable II (DCA5-4F10 Sheathed Flat Cable)
Note Round Cable I, Round Cable II, Flat Cable I, and Flat Cable II
cables are all treated as different types of cables. When two or
more types of cables are used in a single network, a Repeater Unit
must be used to separate any two different types of cables between
the trunk line and a sub-trunk line.
Units.
CompoNet Master Units
CompoNet Slave Units
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)
Word Slave Units: 64 input nodes and 64 output nodes
Bit Slave Units: 128 input nodes and 128 output nodes
Word Slave Units: 16 bits
Bit Slave Units: 2 bits
32 nodes including Repeater Units
Word Slave Units: IN0 to IN63 and OUT0 to OUT63
Bit Slave Units: BIT IN0 to BIT IN127 and BIT OUT0 to OUT127
Repeater Units: 0 to 63
Up to 64 Repeater Units can be connected per network (i.e., per Master
Unit). Up to 32 Repeater Units can be connected per segment. Repeater
Units can be used to create up to two extra segment layers from the Mas-
ter Unit.
Two lines: BDH (communications data high) and BDL (communications
data low)
Two lines: BS+ and BS- (power for communications and internal Slave
Unit circuits)
• Power is supplied from the Master Unit and Repeater Units.
24 VDC ±10%
1 Introduction
Specifications
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