Omron 3G3MV-PDRT2, User Manual

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Chapter 1
1-13
Functions and System Configuration
1-5 DeviceNet System Configuration
1-5-1 System Configuration
DeviceNet is a multi-bit, multi-vendor network that combines controls and data on a machine/line-
control level and that conforms to DeviceNet open field network specifications.
Two types of communications are supported: 1) Remote I/O communications that automatically
transfer I/O between Slaves and the CPU Unit of a PLC without any special programming in the CPU
Unit and 2) Message communications are performed between a CPU Unit to which a DeviceNet
(Master) Unit is mounted and Slaves by executing specific instructions (such as CMND and IOWR,
depending on the model of PLC used) from the program in the CPU Unit.
A Configurator (sold separately) can be used to enable following. This allows the support of an even
larger control system.
• I/O area words can be flexibly allocated for remote I/O communications.
• More than one DeviceNet (Master) Unit can be mounted to a single PLC.
• More than one DeviceNet (Master) Unit can be connected in a single Network.
■
Fixed Allocation: Configuration without a Configurator
Note 1. The DeviceNet (Master) Unit occupies one node of the DeviceNet Network.
Note 2. If C200HS PLCs are used, only remote I/O communications are possible.
Note 3. If one node uses more than one word, the maximum number of nodes will be reduced by
one node for each extra word that is used. (The above numbers of nodes assume that each
node is allocated one I/O word.)
Slave Slave Slave
DeviceNet Master Unit
CS1W-DRM21(-V1)
CJ1W-DRM21
C200HW-DRM21-V1
CVM1-DRM21-V1
SYSDRIVE 3G3MV,
3G3RV, 3G3PV, or
3G3FV Inverter
3G3MV-PDRT2
DeviceNet Communications
Unit (For 3G3MV Inverters)
3G3RV-PDRT2
DeviceNet Communications
Card
(For 3G3RV, 3G3PV, and
3G3FV Inverters)
CS/CJ-series PLCs: 64 nodes max. (including the Master Unit)
CV-series PLCs: 64 nodes max. (including the Master Unit)
C200HX/HG/HE PLCs: 51 nodes max. (including the Master Unit)
C200HS PLCs:
33 nodes max. (including the Master Unit)