The DCS remotely controlled shut-off valve operates in the opposite direction to that at the site
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The DCS remotely controlled shut-off valve operates in the opposite direction to that at the site – how to resolve this?
Start remotely, shut down on-site. Turn off remotely, turn on on-site
Is this a newly installed device or an existing one in use?
Just change the configuration; it’s the opposite, a very simple issue.
Control valves have direct and reverse action, but I can’t find a similar setting for cut-off valves
The description must be clear and detailed, using appropriate terminology to improve the efficiency of problem-solving.
The digital switch module that controls the physical outlet should also have settings for logical assignment; for example, it should be possible to set whether the module’s output will be “0” or “1” through the module’s parameters.
Whether it is modifying the configuration or changing the takeover, the requirements for control security must be taken into account.
The on-site cut-off valve should open when powered and close when power is lost, right? In your DCS, it’s handled through buttons: pressing one of them activates the relay to open the valve when power is available, and pressing it again closes the valve when power is lost. First, make sure these are correct – no problems there – and then change the DCS. To turn it on and off, just do the opposite; if there are two buttons, simply swap their names – it’s not that difficult at all.