Regarding the issue of no display on the pressure transmitter
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I currently have a pressure transmitter on site, belonging to the Flow Meters Division of ##Chuanyi Co., Ltd.; it is an intelligent diffused silicon pressure transmitter of the model HP800_G6BP2DM. Since we don’t have any wiring diagrams or instruction manuals here. The original instrument had 4 terminals: 1 and 2 were the “+” terminals, while 3 and 4 were the “–” terminals. We now connect to terminals 1 and 3, and data is displayed on-site; however, no current flows through the cabinet, so the value is 0 mA, which causes the upper-level computer to keep showing 0. If we receive a reading of 1 or 4 directly, it is not displayed at the site, yet there is current in the cabinet; the data can be inconsistent with what is shown at the site. For example, if the reading at the site is 1 MPA, it shows as 1.2 MPA in the cabinet. I’m not sure what’s causing this; I think it’s a wiring issue. From the information available online, it seems that these instruments are of the two-wire type. No matter how I try to connect it, it doesn’t work. I earnestly ask all the experienced users out there to help analyze what’s going on! Thank you so much!
I remember it was something like 2.3? Or the measurement ranges are different, those of the PLC and the field instruments. Right?:Q:lol
You’re right; I suspected it was a wiring issue. It’s fixed now, thank you!
There should also be English letters nearby, meaning power circuit and test circuit. If not, check whether the range at the site matches that of the cabinet!
It was a wiring issue, which has been resolved. On-site, there are usually English letters below the wiring terminals, haha.