How to invoke One Field Instrument in between two controllers in a 800xA system
Hai Everyone
In a 800xA System,we are using two controllers,one for ESD & FGS and another one for Plant Process. Both controllers are reduntant. We have to create logic regarding cause and effect as well as through control philosophy. In our 800XA system all shutdown and blow down valves are in safety controller,we have created logics for that. Same valves are also used in plant processing. My doubt in this scenerio,for eg SDV-xxx controlled in safety controller, i need the same valve SDV-xxx to be opened or closed based on plant process. How can we invoke the same valve SDV-xxx in process controller. Hope that everyone getting my question. please guide me.We are using FBD language for creating logics
Thanks in Advance
In a 800xA System,we are using two controllers,one for ESD & FGS and another one for Plant Process. Both controllers are reduntant. We have to create logic regarding cause and effect as well as through control philosophy. In our 800XA system all shutdown and blow down valves are in safety controller,we have created logics for that. Same valves are also used in plant processing. My doubt in this scenerio,for eg SDV-xxx controlled in safety controller, i need the same valve SDV-xxx to be opened or closed based on plant process. How can we invoke the same valve SDV-xxx in process controller. Hope that everyone getting my question. please guide me.We are using FBD language for creating logics
Thanks in Advance
Asked 8 months ago
Voted best answer
1
Hi,
My opinion :
1. You can send MMS message communication from PCS controller to SIS controller
2. You must define your MMS metode, when MMS communication is broken, when MMS signal broken what signal will become 0 or 1 .
3. Covert bool mms var from PCS to on SIL Application safey variable
4. Use this safety variable to add to trigger SDV-xxxx
Answered 8 months ago
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