The meaning of the diamonds in the PID diagram
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This post was last edited by Gentle man on 2023-1-7 at 17:05. Hello, experts! I’ve received a PID diagram that contains a diamond shape with a ‘1’ symbol inside; I’m not sure what it means, and neither are the other process engineers. If any of you know the answer, please advise me. Thank you! ! It’s the diamond symbol marked with a red circle in the diagram; the transmitter outputs a diamond-shaped signal containing a 1, while the solenoid valve receives a diamond-shaped signal containing a 0
This post was last edited by tiger2010 on 2023-1-7 19:06. Is there no legend before this PID? Intuitively, it is 0/off/power loss, 1/on/power supplied
This method of representation is not standard; there are no 0s or 1s directly inside the diamond, but rather the initial letter I for \"Interlock\", followed by the interlock number.
Thank you to all the experts for their help in identifying this. I also did some research, and what the expert on floor 3 said is correct – indeed, a chain store needs designations for its locations
The thin-lined diamond represents the symbol for the interlock logic system; the letter “I” (short for Interlock) is indicated within the diamond. When there are multiple local interlock logic systems, these systems should be numbered. Marking “1” or “0” in the diamond usually indicates the logical state under normal or abnormal conditions; specific details can be found in the legend. (This notation is not a standard way of expression, but it can sometimes help in intuitively understanding the sequential relationships.)
Generally refers to PLC control or SIS interlock
It seems that this method of drawing is non-standard; a legend is needed to assist in understanding it, otherwise the results will be incorrect, or it will be impossible to discern the accurate sequential relationships.
Wow, you’re still here… I admire you! Please support what you say~! !