Urgently need the schematic diagram showing the coloring principle of the pump in DCS
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Urgently need the schematic diagram showing how the color of the pump is indicated on the DCS – the pump should turn red when it is running and green when it is stopped. I hope experts can tell me about this schematic diagram
Wow, does this thing even have a schematic diagram? . . . .
I’m really hearing about schematic diagrams for the first time. If it comes to the configuration method for DCS flowchart screens, it’s quite simple. On the route map, the pump’s operating status (DI) is used as a link; if it is 1, it is displayed in red ； If it is 0, green is displayed.
Hehe, I’m sorry. What I meant is that the pump should turn red when it starts properly. If the pump is currently running but it shows green, where should we look for the fault? ? How do I check it? In my opinion, the reason why coloring is possible on the DCS flowchart is as mentioned by the person above: the operating status of the pump (DI) is used as a link; if it is 1, red is displayed ； If it is 0, green is displayed. What I want to know is where this DI point comes from – is it from the pump? Or from the intermediate relay when the pump starts? ? What kind of circuit is used to achieve color display on the DCS? ! !
This post was last edited by ydw629 on 2011-6-1 at 14:34. 1. First of all, you need to figure out what it means when a green color is displayed, and under what circumstances it appears. The fault signals you mentioned are those obtained from the MCC cabinet; it would be best for you to first take a look at the secondary circuit diagrams of some low-voltage or high-voltage equipment (such as motors). The signals reaching the DCS are all there; what type are they? ； 2. Process the signals obtained from the DCS through configuration of the lower-level and upper-level units (logical configuration) ； 3. The issue of color change in the pump you mentioned. The 8421 code can be used ； For example, if there are three DI signals related to the pump – ready, operating, and faulty – you can handle them as follows: ready*1 + operating*2 + faulty*4. If there is a fourth signal, the same principle can be applied. When the value from these data sources is 1, only the \"ready\" state exists; you can customize the color for this state, for instance, to white ； When the value is 2, it displays dark green; when the value is 3, it is green. When the value is 4, 5, 6, or 7, it shows the fault color, yellow ； Of course, it can also be defined using ranges; for example, when the data source is 4 or higher, all items are displayed in the fault color, yellow ； DCS or PLC development platforms offer powerful custom functionality that can be utilized flexibly according to one’s own needs.
There should be a standard for this; for example, it could be specified that operation is indicated by red and shutdown by green. In our factory, it’s customary to use green for operation and red for shutdown.
If you still need to look up answers online for this stuff, it’s better if the original poster stops thinking about it and just lets the expert do the work for them