Regarding grounding, what problems have people encountered in practice, and how were they solved? Let’s discuss it ,
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Regarding grounding, what problems have people encountered in practice, and how were they solved? Let’s discuss it If you want to learn more about this topic, please check out my summary post titled \"Specifications for Grounding Design in Control Systems and a Compilation of Related Information\": http://bbs.hcbbs.com/thread-409298-1-1.html. This post was last edited by Mobei Yihai on 2009-3-22 at 12:34
By debugging the equipment, it was found that both instruments were powered by 24V DC; however, one of them had a voltage of 36V DC. It turned out that the two instruments were not connected to the same ground, so the wires were disconnected and the wiring was corrected, restoring the normal voltage. It is only possible on the same ground.
We encountered a situation where the grounding was connected incorrectly during installation; as a result, when someone used a welder, it damaged all the grounding wires inside our PLC panel. Fortunately, nothing else was damaged! Hehe
The signal ground should be at one end only; it cannot be connected to both the control room and the field site: lol
Issue with digital signal grounding ·~ The installation team is afraid that we might change the grounding method temporarily~~ (either grounding in the control room or on-site), and as a result both ends are grounded, which causes the voltage at the relay to reach around 360V~ Once single-end grounding is used, everything works normally~!
The grounding should be done at a single point, and the anti-static floor should also be grounded. In our plant, the anti-static floor in the synthesis section wasn’t grounded, which caused fluctuations in the temperature of the synthesis tower every time the control cabinet door was opened and closed; the problem was resolved after grounding it.
Grounding is very important; if it is not done properly, it can lead to inaccurate signals being transmitted by the instruments.
In the instrumentation field, grounding is divided into protective grounding and signal grounding. However, the grounding electrodes are integrated with the plant-wide grounding network used in the electrical field, so as to achieve equipotential grounding. However, the protective ground and signal ground of the instruments cannot be connected together before being finally connected to the grounding electrode; separate grounding buses should be used for aggregation. The protective ground can be grounded at multiple points, but the signal ground must be grounded at a single point, usually on the side of the control room.
I recently encountered a problem: since the electrical ground was connected to the ground of our instruments, it caused abnormal communication between the OMRON PLC and the touch screen, with the communication signal dropping frequently
The signal ground cannot be connected to two points at the same time, as this can easily cause incorrect displays in the DCS