REXYGEN Community Forum

deepak

Member

Registered: 2015-11-27

Posts: 9

Controller redundancy

Hi,

Is there any way to implement CPU redundancy using REX with raspberry. For example, There are two raspberry pi's running REX and there is one analog I/O module connected to the first raspberry pi's I2C bus and the second analog I/O module connected to the second raspberry pi's I2C bus .

Both the raspberry pi's are connected over TCP/IP or I2C where one pi is master and the other pi is a slave. The program is running parallely in both the raspberry pi's but only one of them is active and controlling the I/O module. If the first raspberry pi (active) fails for some reason, the second one takes over with a bumpless transfer thus saving the process. People connected with the process industry will find this familiar.

I require this because we have developed some solutions for the Power plant that i am working at but they have not been approved by top management because it lacks controller redundancy. Please help.

jaroslav_sobota

Administrator

Registered: 2015-10-27

Posts: 535

Re: Controller redundancy

Yes there is! I just added an example to GitHub repository of REX Control System examples. Here is a direct link to Controller redundancy example.

For this project, you will need the licence for using Advanced function blocks on your Raspberry Pi.

Hope this helps!

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Monarco HAT for Raspberry Pi - Lightweight I/O for monitoring, archiving and control.
Raspberry Pi in industrial automation!

soxso2011

Member

From: India

Registered: 2015-11-25

Posts: 37

Re: Controller redundancy

Brilliant !