Redundancy; Redundant Architecture; Figure 23 Redundant Configuration And Possible Failure Scenario - M10X-M - ABB LVS Digital Manual

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R EDU NDA NT AR CHIT ECTURE

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6. Redundancy

A redundant system requires two Digital Gateway connected to the same internal switchgear

bus. One Digital Gateway acts as Primary and the other acts as a Backup.

The primary Digital Gateway polls the M10x via internal Modbus RTU and is responsible for

sending the switching commands, as well as reading the information fed back from the M10x

via the Digital Gateway.

The Backup Digital Gateway reads the information only and is inhibited from sending switch-

ing commands.

The Primary and Backup Digital Gateway is synchronized using a redundant link cable.

A redundant system does can cover single system failures. Following theoretical failure situa-

tions are covered by a redundant system configuration:

On an active communication link:

• Failure in a PLC Fieldbus master or failure in a Fieldbus cable connection between one mas-

ter and slave.

• Failure in a Digital Gateway

Gateway

Figure 23 Redundant configuration and possible failure scenario – M10x-M

2 8

failure at the switchgear bus connection to a single Digital

R EDU NDA NCY

1 TG C90 80 04

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