Omron CP1H CPU UNITS - PROGRAMMING 05-2007, Operation Manual

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DeviceNet I/O Link Units
Section 7-7
7-7 DeviceNet I/O Link Units
Connecting a CPM1A-DRT21 DeviceNet I/O Link Unit (with 32 inputs and 32
outputs as built-in I/O) to function as a slave allows the CP1H to be used as a
DeviceNet slave. A maximum of three DeviceNet I/O Link Units can be con-
nected to the CP1H to create I/O Links for up to 192 points (96 inputs and 96
outputs) between the CP1H and the DeviceNet master.
From the standpoint of the CP1H CPU Unit, the 32 input bits and 32 output
bits allocated to the DeviceNet I/O Link Unit are identical to input and output
bits allocated to Expansion I/O Units even though the DeviceNet I/O Link Unit
does not control external inputs and outputs. The input and output bits allo-
cated to the DeviceNet I/O Link Unit are one side of an I/O link between the
slave CPU Unit and the CP1H CPU Unit to which the Master Unit is con-
nected.
Note Refer to the DeviceNet Slaves Operation Manual (W347) for details on
DeviceNet networks.
CP1H CPU Unit
PLC supporting DeviceNet master,
e.g., CS, C200HX/HG/HE (-Z),
CVM1, CV-series, etc.
DeviceNet Master Unit or
DeviceNet Unit
DeviceNet transmission path
DeviceNet slave
CPM1A-DRT21
DeviceNet I/O Link Unit
DeviceNet slave
Each Unit enables remote I/O
communications for 32 input and 32
output points as a DeviceNet slave.
Master PLC (CS Series with fixed allocations)
CPU Unit
CP1H
CPU Unit
I/O memory I/O memory
Inputs
CIO 350
CIO 351
Outputs
CIO 50
CIO 51 Inputs
CIO 2
CIO 3
Outputs
CIO 12
CIO 13
32 bits
32 bits
32 bits
32 bits
DeviceNet
Master Unit
Unit No. 0
DeviceNet
I/O Link Unit
Node
number: 0