Can’t the pump be started remotely in program-based automation? What standards are specified?
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Can’t the pump be started remotely in program-based automation? What standards are specified?
From a technical perspective, it is entirely possible to start a pump remotely, but due to safety concerns, this method is rarely used (except in cases where process requirements dictate that the pump should start automatically; however, such pumps require stricter maintenance and inspection procedures, and it is generally necessary to bypass the automatic start function when carrying out these tasks). Since remote pump startup does not allow confirmation of the actual conditions on site, such as whether anyone is working there, it poses certain risks; therefore, remote pump startup is generally not implemented.
Of course, it depends on the specific process; devices that operate intermittently generally also need to be capable of remote start and stop
Can’t maintenance work involve bringing the pump to a local control mode so that it can’t be started remotely?
Technically, there are no issues at all; as long as the instruments and electrical systems can communicate properly. Moreover, modern units are equipped with a pump auto-start function – in the event that the main pump stops working or the liquid level rises, the backup pump starts immediately, thereby ensuring the safety and continuity of the production process. However, remote starting is not used in normal operations, as starting the pump requires procedures such as turning the shaft by hand; it is best to wait until someone is on site to check everything before starting the pump.
Existing technology makes it entirely possible to start pumps remotely. However, in production, aside from those pumps that must start automatically due to process requirements, the starting of other pumps is generally done via a signal sent from the control room, with the actual starting taking place on-site – after all, operations such as operating the pump controls are still necessary, and this is also done for the safety of personnel and equipment.
Have we all forgotten what the main operator (control room) and the field operator do?