Introduction

An embedded DIO scanner service in a standalone (BMEP58•0•0) or Hot Standby (BMEH58•0•0) M580 CPU can manage distributed equipment. Through this service, Ethernet gateway devices (like Profibus and CANopen masters) can operate as distributed equipment.

All DIO scanning communications occur over the Ethernet backplane or through an Ethernet port.

NOTE: The BMEP58•040 CPUs also manage RIO modules through the RIO scanner service, but this discussion applies to the DIO scanner service.

DIO Scanner Service Overview

In this network example, the CPU is connected to the DIO network (2) and the control network (8).

1 a CPU with an embedded DIO scanner service

2 copper portion of the main ring

3 fiber portion of the main ring

4 DRS connecting a DIO sub-ring to the main ring

5 DRS configured for copper-to-fiber and fiber-to-copper transition connecting a DIO sub-ring to the main ring

6 DIO sub-ring

7 DIO cloud

8 CPU connecting the control network to the M580 system

This illustration shows direct connections to distributed equipment:

1 A CPU on the main rack runs the Ethernet I/O communication server service.

2 A BMENOC0301/11 Ethernet communication module (Ethernet backplane connection disabled) manages distributed equipment on the device network.

3 A BMENOC0301/11 Ethernet communication module (Ethernet backplane connection enabled) is connected to a DIO cloud.

4 A BMENOS0300 network option switch module is connected to a DIO sub-ring.