Omron CJ1W-DRM21 Operation Manual page 147

Pattern One Master Unit con-
nected on a single net-
Precautions Same as previous net-
works.
Note You can connect only one Master Unit to a network if you specify a COS or cyclic connection
with the use of CX-Integrator. Remote I/O communication errors may occur. In such a case,
therefore, change the system setup so that only one Master Unit is connected to a network.
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Multiple Master Units con-
nected on a single network
work
• The communications cycle time
is longer.
Note The communications cycle
time for the network in the
figure above is TA+TB if sec-
tions A and B above are
separate networks with a
communications cycle time
of TA and TB.
• Multiple Master Units cannot
share a single Slave Unit.
• Bus Off errors (communica-
tions stopped by multiple trans-
missions) may occur if multiple
Master Units with disabled scan
lists are present on a single net-
work.
4 Remote I/O Master Communications
Multiple Master Units con-
nected to a single CPU Unit
• Make sure that each word allo-
cated in the system is allocated
to only one Master Unit.
4
4-7