State Industries GFK-0827 manual Appendix Redundancy Alternatives

Appendix

A

Redundancy Alternatives

Redundancy Alternatives

There are several redundancy alternatives for the Series 90-70 Programmable Logic Controller. These redundancy options consist of implementation of the redundancy feature through a user logic program or through a redundancy product which consists of both hardware and software. The type of redundancy product alternative that is used is also referred to as the Control Strategy, which must be defined for configuration purposes. Redundancy alternatives are:

HHot Standby Application Logic;

HHot Standby Product plus Application Logic;

HHot Standby Product (described in this manual);

HESD (Emergency Shutdown System) Duplex Application Logic;

HESD Duplex and Triplex GMR (Genius Modular Redundancy) (see GFK-0787, Genius Modular Redundancy User's Manual).

For your information the following Redundancy Selection Guide is provided which lists the features desired through implementation of a redundancy system followed by a table which further describes these redundancy options.

Note

Note that the redundancy option described in this manual is the Hot Standby Product.

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