Creating and Accessing RIO\DIO Field Buses

Introduction

Quantum PLCs offer a decentralized input/output architecture solution:

RIO field bus networks are based on the S908 input/output decentralization network technology. Up to 31 decentralized stations may be configured, with each station capable of supporting up to 128 input/output words.
DIO field bus networks are based on Modbus Plus technology. 32 subscribers may be configured over 500 meters/1640 feet (receiving 64 subscribers over 2000 meters/6560 feet).

Creating a RIO Bus

The following table describes the procedure for creating a RIO bus from a communication module:

Step	Action
1	In the bus editor, select the slot where you wish to insert the communication module.
2	Select New Device in the contextual menu. Result: The New Device window appears.
3	Expand the Communication directory. Result: The following window appears:
4	To create a RIO bus, select a 140 CRP 93x 00 module. Result: The bus appears in the project browser:

Creating a DIO Bus

The following table describes the procedure for creating a DIO bus from a communication module:

Step	Action
1	In the bus editor, select the slot where you wish to insert the communication module.
2	Select New Device in the contextual menu. Result: The New Device window appears.
3	Expand the Communication directory. Result: The following window appears:
4	To create a bus, select a 140 NOM 2XX 00 module. Result: The module appears in the rack.
5	Double-click the 140 NOM 2XX 00 module’s Modbus Plus port. Result: The bus configuration window appears.
6	Check the box marked DIO Bus.
7	Confirm the configuration. Result: The DIO bus appears in the project browser.

Creating a DIO Bus from the Processor

The following table describes the procedure for creating a DIO bus from the processor:

Step	Action
1	In the bus editor, double-click the processor’s Modbus Plus port.
2	Check the box marked DIO Bus.
3	Confirm the configuration. Result: The DIO bus appears in the project browser:

Accessing a RIO or DIO Bus

To access a bus, carry out the following actions:

Step	Action
1	In the project browser, open the Configuration directory. Example:
2	Select the RIO bus or DIO bus subdirectory depending on the type of bus you want to open. Next, select the Open command in the popup menu. Result: The following window is displayed for the RIO bus: Result: The following window is displayed for the DIO bus: