2-1 overview, 2-2 unit number, Overview – Omron CQM1H-CLK21 User Manual
Page 113: Unit number, Unit no
90
CJ-series Controller Link Units
Section 4-2
4-2-1
Overview
Unit Number
Node Address
Baud Rate
Note
Factory default setting is in bold.
Terminating Resistance
4-2-2
Unit Number
Set the unit number for each Unit using the rotary switches on the front of the
Unit. The unit number is used to identify a CPU Bus Unit within the PLC. Any
unit number can be set between 0 and F in hexadecimal (00 to 15 in decimal).
Set the node address using a small flat-blade screwdriver, being careful not to
damage the rotary switches.
Note
1.
Always turn OFF the PLC’s power before setting the unit number.
2.
When setting a Unit for the first time or changing the existing setting, create
a I/O table in the PLC’s CPU Unit.
3.
Do not set the same unit number twice within the same PLC. An error will
occur if the same unit number is set for two different Unit, and the CPU Unit
will not be able to recognize the Units.
4.
When the Unit is recognized by the PLC’s CPU Unit, “NS” will be shown in
the I/O table displayed for the CX-Programmer programming device.
UNIT
No.
RUN
CLK21-V1
ERC
INS
ERH M/A LNK
RD
NODE
No.
x10
1
x10
0
01
23456789
ABCD
EF
0
TER
SD
1 2 3 45
678
9
01
2 3 45
678
9
BAUD
RATE
1
2
ON
SW1
ON
TER SW
BD H
BD L
SHLD
ON
1
2
UNIT
No.
NODE
No.
x10
1
x10
0
01
23456789
ABCD
EF
01
2 3 45
678
9
01
2 3 45
678
9
BAUD
RATE
1
2
ON
SW1
ON
1
2
Setting range
Nodes
01 to F (default is 0)
All nodes in the Network
Setting range
Nodes
01 to 32 (default is 01)
All nodes in the Network
Pins
Baud rate
Maximum
transmission
distance
Nodes
Pin 1
Pin 2
OFF OFF
2 Mbps
500 m
Set same
rate for all
nodes in the
Network.
ON
OFF
1 Mbps
800 m
OFF
ON
500 Kbps
1 km
ON
ON
Cannot be set.
Front switch
Terminating
resistance
Nodes
OFF
(factory default)
Not connected
All nodes in the Network
Turn ON the terminating resis-
tance at the nodes at both
ends of the Network and turn it
OFF at all other nodes.
ON
Connected
Item
Specifications
Setting method
Single-digit hexadecimal
Setting range
0 to F (decimal 00 to 15, default is 0)
Node
All nodes in the Network
UNIT
No.
01
23456789
ABCD
EF
Note: The factory default settings are shown.