Using CitectSCADA > Building Redundancy Into Your System > Data Path Redundancy

Data Path Redundancy

Data path redundancy is another form of redundancy involving defining data paths between the I/O Server and the connected I/O Devices. By providing a second (parallel) data path, you improve the chances that if one data path to the I/O Device is disconnected, the other can be used.

Most brands of PLCs have the facility to allow you to install a parallel data path from the I/O Server to the I/O Device.

The diagram above shows that an additional data path (running in parallel) has been defined. The redundancy is provided as follows:

On a larger system (such as one running on a network), you can also use data path redundancy to maintain device communications with multiple I/O Server redundancy, as shown in the following diagram.

The redundancy is provided as follows:

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