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Hello everyone!
I am working in the Instrumentation Department of a Paper Mill with 3 paper machines. 1 of which is run and monitored by the DCS built on Honeywell Experion 410 PKS using C200 control processors. The pulp mill, paper machine, recovery boiler and power plant are all managed by this system. There has been an issue plaguing us for quite some time that has resulted in occasional breakdowns and huge losses in production.
The main cause of concern is the frequent switchover (as low as 3 to as high as 12 in a day) of the primary controller to the secondary, redundant controller (back and forth) at a frequency much higher than is normally acceptable. Our initial analyses and fault finding pointed at improper grounding practices that have since been completely resolved with the installation of an isolation transformer among other fixes.
Can any of you give your thoughts in general, based on your own experiences or otherwise, that could help us point out the root cause of this issue and which direction we could head in? Any help at all would be greatly appreciated. Also, feel free to ask for more information on specifics which I will provide to the best of my ability.
Thanks in advance and a happy new year to you all!
I am working in the Instrumentation Department of a Paper Mill with 3 paper machines. 1 of which is run and monitored by the DCS built on Honeywell Experion 410 PKS using C200 control processors. The pulp mill, paper machine, recovery boiler and power plant are all managed by this system. There has been an issue plaguing us for quite some time that has resulted in occasional breakdowns and huge losses in production.
The main cause of concern is the frequent switchover (as low as 3 to as high as 12 in a day) of the primary controller to the secondary, redundant controller (back and forth) at a frequency much higher than is normally acceptable. Our initial analyses and fault finding pointed at improper grounding practices that have since been completely resolved with the installation of an isolation transformer among other fixes.
Can any of you give your thoughts in general, based on your own experiences or otherwise, that could help us point out the root cause of this issue and which direction we could head in? Any help at all would be greatly appreciated. Also, feel free to ask for more information on specifics which I will provide to the best of my ability.
Thanks in advance and a happy new year to you all!