Are there any tips for starting up a DCS?

DCS is designed to serve the manufacturing process. It can only be said that at the start of operation, certain automatic interlocks and other systems are activated once stable operation is achieved; for the rest, you need to become familiar with the complex control circuits present in the system. As for the manufacturing process itself, it goes without saying that you must be familiar with it as well. After that, a few days are sufficient to get to know the parameters and the operation interface

1: DCS is just a system; it is recommended to run simulations of it several times before actually driving (it’s not actual operation, but just simulation on a computer) to check for any bugs in the system. 2: Pre-driving inspection (it is recommended to use a checklist as part of the test drive record): Check the pipelines, valves, instruments, power equipment, and main electrical system. Ensure there is no loosening or leakage, and that the connections are correct ； Inter-wire resistance, whether the wire sequence is correct ； Whether the fans and pumps are running in reverse, etc. 3: Write a driving operation manual (which can serve as a reference for future startup SOPs), in which each step of the operation is simulated in advance, and potential risks are identified and mitigated in advance. Each step of the operation is confirmed with a signature. The operation manual must at least be reviewed by technical experts; if you are one of those experts, it is advisable to have someone else take a look as well to avoid any oversight. 4: Debugging and recording of system operation parameters – it is recommended to keep a record of each parameter adjustment (time, person who made the adjustment, original parameter value, new parameter value, purpose of the adjustment, and effect of the adjustment). This ensures that every action is documented for easy review. 5: List of missing systems. No system can be perfect from the start; without compromising its safe operation, any missing items should be recorded, along with the responsible person and deadline, to facilitate follow-up tracking. 6: Write a test report after stable operation. Summarize the test run details, and once the handover conditions are met, use the test report as evidence for the handover report. This is just a general idea; different organizations have different procedures, so it’s still necessary to act according to the actual circumstances.

I used to be involved in fructose production, focusing on the control of DCS systems. First, one needs to be familiar with the process flow, understand what each valve is used for, and know how to control the opening degree of automatic valves. It’s also important to know whether there are manual valves in front of each valve. When starting up the equipment, it should first be operated locally to ensure normal operation before switching to remote control. If one is not very familiar with the equipment, the next unit can be started when the liquid level reaches 30%-50%. If there are no issues with either the preceding or subsequent processes, then level-based interlock control can be used; otherwise, the pump speed should be adjusted based on the trend of the liquid level. For variable frequency drives, our startup usually starts at 50 and then increases gradually. If you have any questions regarding operation, feel free to ask me; of course, I won’t be able to answer anything related to the manufacturing process

It would be best to have a designer provide training for everyone first to guide them on how to operate it

There are procedures to follow when starting up operations. Regarding the DCS system, it is necessary first to calibrate all the instruments on the DCS. If there is a SIS interlock system, the instruments should also be used to check the triggering effect of the signals. If possible, conduct a trial run by flushing with water first to check the system flow and train employees on the operation. It is also necessary to specify documents such as the required operational procedures and emergency plans, arrange for employees to learn them, and only then proceed with production at low volumes, allowing them to gradually get familiar with the operations and understand them better over time