May I ask how the I/O table for the instruments and the wiring diagram for the electrical secondary control systems are prepared? Based on the PID drawings?
Thread Content
1. I/O table: Which data in the PID diagram needs to be included in the I/O table? 2. Motor secondary wiring control table – where does this come from? Which major to start from? 3. For complete sets of equipment, is it sent out by the equipment manufacturer? Manager Discussion Group
1. The I/O list is a compilation of various signals used to access the control system, such as AI (RTD’s, thermocouples, 4-20mA signals, etc.), AO, DI, DO, and pulses. Different design institutes have distinct responsibilities; generally, it involves the aggregation of electrical and instrumentation signals. 2. You said that’s the electrical drive schematic. The design is generally carried out by the electrical engineering department upon commission from the process engineering department. 3. Complete sets of equipment: There are several situations. a) The process equipment is equipped with sensing elements, as well as electrical control for local and remote operation. The design boundary between the equipment package and the instrumentation is at the sensing element or the junction box. The electrical interface is the field control box. Of course, the power supply needs to be designed. b) The interface of the second type of instrument remains unchanged, and the drive control of the equipment is designed by the electrical engineering team. c) Complete small system of equipment, fully integrated. Only one electrical power supply is required for operation. Generally, it's one of these situations. It mainly depends on the requirements specified in the equipment specifications. The requirements vary, and so do the funds returned by the equipment manufacturers.
Agree with the person above; it’s already very detailed.
1. The I/O table is a compilation of all detection and control points. In other words, both the points input into the system module and the points output by the system need to be recorded. 2. The motor secondary wiring control table is prepared jointly by the electrical engineering and automation departments. There are also design institutes that combine the two specialties into one. 3. Whether as a complete set or not, it is necessary to work together with the design institute to establish proper interfaces for the overall control of processes and equipment. New projects are generally developed by design institutes, which integrate the technical documents provided by equipment manufacturers into the overall design. The modification project involves the manufacturer, based on the existing system, sending the control and electrical schematic diagrams of the equipment to the user in order to achieve system integration. The specific operations are proposed by the users, while the manufacturer designs the corresponding solutions.
1. Remote transmitters, various control valves and shut-off valves, as well as motors that can be controlled remotely – these should be listed in an I/O table. 2. The motor secondary wiring is determined according to the operating equipment specification sheet; the process engineering department will provide it to you. 3. For complete sets of equipment, it is also necessary to identify the control points required by the process engineering field, based on the feedback from the manufacturers.
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