Method for distributing I/O cards for DCS (Data Communication System)

Abstract

The invention discloses a method for distributing I / O cards for DCS (Data Communication System). The method is characterized in that the EXCEL VBA technology is utilized. The method comprises the following steps: a, inputting a measurement point list into a computer system, wherein the measurement point list includes number of each measurement point, name of each device, name of each measurement point, type of signal and group number; b, inputting the type of the I / O cards and the number of point, and calculating the quantity of the I / O cards of different types; c, inputting capacity parameters of I / O cards in a cabinet, and generating a layout and a list of the I / O cards in the cabinet; d, creating a list of I / O card channels without the distributed measurement points according to the measurement point list; e, grouping the measurement points according to the keywords; f, distributing the grouped measurement points to the channels of different cards, and creating an I / O card channel distribution sheet. With the adoption of the method for distributing the I / O cards for the DCS, the automatic arrangement of the cabinet and the automatic distribution of the measurement points are realized, the cards can be accurately an automatically arranged, thus the accuracy of the obtained channel sheet is ensured, and good guide can be brought to production.

Description

technical field [0001] The invention belongs to the field of DCS design, in particular to a method for automatically generating and distributing channel tables of general DCS cabinets. Background technique [0002] In the design process of a thermal power plant, the work content of assigning I / O cards to the DCS cabinet is very complicated. The traditional design method is to count the number of different cards required according to the signal type of the IO measurement point list, and according to the layout requirements of the DCS manufacturer When making layout drawings, different DCS manufacturers often have different layout requirements, so the layout drawings and measuring point channel tables made by designers are often different. When assigning I / O measuring points to the channel table, it is very easy to make mistakes, and the work The quantity is very large. There are several problems in this process. First, due to the large number of DCS manufacturers and differe...

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Problems solved by technology

[0002] In the design process of a thermal power plant, the work content of assigning I / O cards to the DCS cabinet is very complicated. The traditional design method is to count the number of different cards required according to the signal type of the IO measurement point list, and according to the layout requirements of the DCS manufacturer When making layout drawings, different DCS manufacturers often have different layout requirements, so the layout drawings and measuring point channel tables made by designers are often different. When assigning I / O measuring points to the channel table, it is very easy to make mistakes, and the work very large

There are several problems in this process. First, due to the large number of DCS manufacturers and different cabinet layout methods, the layout diagram cannot be used universally. The number of channels is completed line by line in EXCEL. Manual work is heavy, tedious, and has a high probability of error. A project often has dozens or hundreds of cabinets, which requires a lot of manpower; again, when allocating I / O point channels It needs to be assigned to the unassigned channel of the corresponding signal type according to the signal type of the signal, and it needs to be considered that the measurement points of the redundant equipment need to be assigned to different card channels for safety and redundancy requirements, which requires manual judgment and selection , laborious, very tedious and error-prone

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