The historical trends for the Yokogawa CS3000 DCS system are missing. What’s the reason?
Thread Content
The DCS system of our unit’s high-pressure paraffin hydrogenation plant is the Yokogawa CS3000 system. Historical trend data has not been available since October, and the maintenance staff believe that the hard drive may be the problem; the plant needs to be shut down for repairs to address this issue (if it is indeed a hard drive problem, is it possible to fix it while the plant is still operational?). Are there any other possible causes? Thank you! Urgent! Urgent! Urgent! ! ! This post was last edited by sunhow on 2008-1-7 16:11]
Don’t you have a backup? Dual-hard drive redundant system? Is it connected to the external internet, such as EMS? If it’s connected, is it read-only? It could also be due to a virus, but it’s more likely that the software is not working properly
Could the person upstairs be more specific? Is the software not working properly? What is abnormal?
There should be no problem with the hard drive; you can try reconfiguring it online.
If just one of the operation stations in the system is broken, it can be replaced directly. If it’s the engineer station that is damaged, create a backup; the parameters can be saved so that it can be replaced. Those who are not familiar with the system are advised to stop the machine and replace it.
It can be chosen during configuration which operation station will store the historical trends, as well as which operation stations can view them. The first possibility is that when the operation station capable of storing historical trends is turned off, historical trends cannot be recorded and therefore cannot be viewed ； The second possibility is that you have not purchased the long term software package, so the duration for which historical trends are stored is limited. When a certain amount of time passes, the previous historical trends are overwritten by those that occur later, so they can no longer be seen ； The third possibility is that the long term period is defined in a certain location or partition; when viewing it, it is necessary to locate where it is stored and select the time frame you want to view. The above are just a few possibilities. The hard drive is unlikely to be damaged.
Dizzy! A bunch of random answers. I couldn’t see clearly that “the historical trend will no longer be visible starting from October”. It seems that this phenomenon occurs in the Foxboro system: when the hard drive is full, historical trends can no longer be displayed (unless the configuration specifies automatic deletion of older historical data files). If it says “the historical trend is no longer visible starting from October,” then check first whether the hard drive is full ； If there are several operation stations, this machine with the historical trend configuration can be reinstalled. It’s possible that the software is not working properly, but I have never encountered this issue before.
Thank you very much to the people above for their active participation. I am deeply grateful. The company that handles instrument maintenance is separate from ours, so it’s common for the maintenance staff to not tell the truth and thus deceive us. A similar situation occurred in the system of another factory as well; at that time, someone altered the historical trends of a certain table, which led to abnormal trends throughout the entire system ； This post was last edited by sunhow on 2008-1-8 16:59.]
Check whether the engineer station is working properly and the software settings are correct
It happens from time to time that those in the instrumentation field deceive process engineers; I think it probably occurs in other companies and factories as well. There’s nothing you can do about it – after all, it’s a matter of different specialties. ;P
Not long ago, something similar happened in our factory as well. The underlying cause, for the owner’s reference, was that the Win2000 system prevented the generation of historical curves; reinstalling CS3000 did not help. Eventually, the issue was resolved after reinstalling Win2000 and then installing CS3000 again
It seems that after the CS1000/3000 has been running continuously for a certain number of days (appears to be over 300 days), problems arise and it needs to be restarted. It’s due to the Microsoft system. At that time, Yokogawa in Shanghai sent a letter specifically to the customers. Is that the reason? What the gentleman upstairs said reminded me of this incident.
This device started operating in October 2005; by October 2007, the trend had disappeared. The person upstairs said to restart the system – will that affect normal production? This post was last edited by sunhow on 2008-1-10 08:42]
I agree with the analysis in points 6 and 7; problems that arise after the system has been running properly for a long time are usually caused by changes to certain settings. Issues such as data loss should not occur in a well-functioning system, unless the hard drive is full. In modern systems, old data is automatically deleted by default.
If it is the operator who restarts it, it should not affect the system
It’s actually very easy to solve: simply change the save file for the CS3000’s long-term trend to another directory. This is without reinstalling the equipment. However, it’s best to reinstall the system. The HIS operator station for the CS3000 can be installed anywhere without any problems; as long as the engineer station is left unchanged, there’s no need to shut down the system and perform offline installation
Copy and paste the long-term trend data from the HIS historical trend station. Restart the Trend Station.
I would like to ask the experts: we are facing a problem. It works fine to view long-term trends on the historical station, but it no longer works when other operation stations try to access the long-term trends from that historical station; it was working fine before