How to record the number of times a valve is opened and closed as well as the usage time of key instruments
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Dear colleagues in the chemical industry, I’ve encountered a problem recently and would like to seek advice from the experts at Haichuan. :How can a handshake mechanism be used to provide alerts (such as alarms) in the control room for valves and instruments that have reached the end of their service life? For example, if a valve needs to have its seal replaced or must be taken apart for inspection after being opened and closed a certain number of times under specific operating conditions, the control system can keep track of the number of openings/closings and issue an alert when this value approaches the set threshold. :To achieve the above functions for a handshake, what additional functions or components are needed for the electrical elements ranging from the field instruments to the control room?
This post was last edited by ZhiGE on 2020-2-28 at 13:16. 1. Intelligent valve positioners come with diagnostic functions； 2. The DCS system cards have HART functionality ； 3. AMS system, with a means for collecting HART information ； 4. Specialized software and licenses for valve diagnosis, such as FISHER VALVELINK and METSO DEVICE CARE, can only be used with the corresponding positioners ； 5. Project implementation, commissioning, and maintenance tracking. There need to be highly qualified engineers. Therefore, to achieve better results, these aspects should be considered during the project planning phase. Implementation later on can only be carried out on a small number of key valves.
Hello, thank you for your professional reply! My control system uses a PLC plus industrial computer setup; the main valves are centerline butterfly valves, solenoid valves, and ball valves, all of which have only on/off functionality, with no control valves available. I checked – for tracking the number of uses, is a \"counter\" used, and for monitoring usage time, is a \"timer\" used? Could you please tell me if it’s feasible? The above idea is not necessarily correct; it is a suggestion from the solenoid valve supplier. How can ordinary valves equipped with limit switches solve this problem? And each solenoid valve? Thank you
Hello, thank you for your professional reply! My control system uses a PLC plus industrial computer setup; the main valves are centerline butterfly valves, solenoid valves, and ball valves, all of which have only on/off functionality, with no control valves available. I checked – for tracking the number of uses, is a \"counter\" used, and for monitoring usage time, is a \"timer\" used? Could you please tell me if it’s feasible? The above idea is not necessarily correct; it is a suggestion from the solenoid valve supplier. How can ordinary valves equipped with limit switches solve this problem? And each solenoid valve? Thank you
Don’t you use a PLC for control? Just write a counter in your program; it increments by 1 each time it’s activated
If only the count is needed, there is no need to add additional components; a counter module can be used to keep track of the number of times the valve is opened and closed.
The number of switchings is hardly reliable as an indicator of the valve’s lifespan or maintenance cycle
Write the valve feedback signal to the PLC; the counter increases each time the valve is switched on or off
Hello, thank you for your reply. You are right; periodic inspections of the key valves are indeed necessary.