The DCS system is equipped with redundancy
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:) The instruments are transmitted to the DCS system, which sets aside a degree of redundancy as needed. Under what circumstances is redundancy required, and what level of redundancy is appropriate?
I’m not sure whether the poster is referring to the number of points that need to be redundant, or the number of backup points, or something else. . . . . . ?
Reply to 2# masanhong: The number of spare points required
What you mean by this isn’t called redundant configuration. A backup capacity of around 20% for the number of I/O cards per point (i.e., the number of channels occupied) is sufficient. For example, for 8 channels, channels 1-2 can be left free; for 16 channels, channels 2-3 can be left free.
A redundancy factor of 10% to 15% is generally required.
This post was last edited by masanhong on 2010-5-26 at 15:24. Reply to 3# Xinglin Yu: It depends on the actual circumstances! We usually keep 15%-30% as a reserve.
What aspects require redundancy? For example, analog signals used for control need redundancy, while those used for display do not
Generally, a 20% margin is reserved during design. However, in actual operation, the process requires adding quite a number of points (which company managers generally approve), so the 20% available becomes insufficient. My personal suggestion is no less than 30%. Of course, it depends on the* habits of your company :)
Redundancy is provided for general control circuits, interlock circuits, and critical points.
I think we should stock up more; it’s completely normal for process requirements to increase. Such demands arise after production has gone on for a while, and not having enough in stock would put us in a difficult position.
I don’t understand what the original poster means by asking such a question; it’s better to focus on learning the basic knowledge.