Omron CQM1-ARM21, Operation Manual

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AS-Interface Network Installation
Section 2-3
15
The word addresses allocated in the PLC for the slaves’ I/O data depend on
the position of the Master Unit on the PLC. Refer to 4-1, PLC Settings, or the
CQM1 Programming Manual, W228-E1 for more details.
End Cover After connecting the Master Unit, attach the End Cover to the Unit on the far
right side of the PLC and attach the PLC to the DIN rail by locking the mount-
ing pins onto the DIN track.
2-3 AS-Interface Network Installation
To complete an AS-Interface system, the following items are required, apart
from the CQM1 PLC system with the CQM1-ARM21 Master Unit:
•
AS-Interface Power Supply.
•
AS-Interface Cable.
•
AS-Interface Slaves:
general-purpose I/O slaves, and/or
sensors / actuators with integrated AS-Interface slave function.
A hand-held addressing device can be useful to build up the network, but is
not essential, since the CQM1-ARM21 provides equivalent functionality when
used in Setup Mode (See 4-5, Setup Mode)
2-3-1 AS-Interface Power Supply
Select an AS-Interface power supply that can provide sufficient power to
support the Master Unit and all AS-Interface slaves to be connected to the
bus. The CQM1-ARM21 will use less than 100 mA from the AS-Interface line.
If the output current of a power supply unit is insufficient to power the whole
configuration, use AS-Interface repeaters and power each segment
separately.
2-3-2 AS-Interface Cable
The AS-Interface specification does not prescribe the use of the special AS-
Interface ’yellow cable’, as long as the cable meets the basic requirements as
listed in 1-1-2, System Components.
The AS-Interface ’yellow cable’ may be necessary to allow the installation of
certain types of slave.