Omron CVM1 Series, Operation Manual

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13
Installing PC Link Units Section 2-2
• In a single-level system, just one PC Link Unit can be mounted in a PLC.
In a multi-level system, up to two PC Link Units can be mounted in a PLC.
• When mounting other CPU Bus Units, do not exceed the maximum of 16
CPU Bus Units per PLC.
Note Tighten the PLC Backplane mounting screws to a torque of 1.2 N
⋅
m and
tighten the Unit securing screws to a torque of 0.9 N
⋅
m.
Number of PC Link
Units per PLC
In a single-level system, one PC Link Unit can be mounted in a CVM1/CV
Series PLC. In a multi-level system, two PC Link Units can be mounted.
Note The PC Link Units will not detect an error even if two PC Link Units with con-
flicting operating level settings (one or both single-level, both multi-level link
#0, or both multi-level link #0) are mounted in the same PLC. To be sure that
the PC Link operates properly, verify that the level settings are correct.
One PC Link Unit set for single-level operation can be mounted in a single
PLC, or two Units set for multi-level operation (one set to Link #0 and the other
set to Link #1).
CVM1/CV Series
1) CPU Rack
Can be mounted.
CVM1/CV Series
1) CPU Rack
CVM1/CV Series
1) CPU Rack
Can be mounted.
Can be mounted.
2) Expansion
CPU Rack
Cannot be
mounted in
Expansion
I/O Rack.
Cannot be mounted in
Expansion I/O Rack.
Can be mounted.
Cannot be mounted in Expansion I/O Rac
k.
Level setting Number of PC
Link Units
Remarks
Single-level Just one Unit ---
Multi-level One or two Units Set one level as Link #0 and the other as Link
#1. If a PC Link Unit is set to single-level oper-
ation, it cannot be mounted in the same PLC
with another PC Link Unit.