Method for counting interlock circuit numbers
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1. As stated in the title, what is the method for counting the number of interlock circuits? Should it be based on the number of actuators, the number of measurement points, or the logical relationships? Are there any standards in this area? Let’s discuss it together. 2. What are the records for control systems? 3. Work instruction sheets – are there any companies using them? How can one truly provide guidance on homework? What do everyone else do? Let’s discuss these few issues. Automatic control instruments
I think this matter still needs to be considered from the perspective of the logical relationships between the devices. A interlock circuit definitely has causes and effects, and these can be a one-to-one relationship, multiple causes leading to one effect, or one cause resulting in multiple effects. Focusing solely on measurement points or actuators can lead to omissions or repetitions. All interlock circuits are designed to protect the equipment. When conducting statistics, it is possible to do so by specific devices. For example, take a PID diagram, identify the main device, and then conduct statistics on each of the five key variables (pressure, flow rate, liquid level, temperature, and composition). For example, a reactor level interlock circuit, a pump temperature interlock circuit, or a tower pressure interlock circuit. Personal opinion, for reference only.