Based on the understanding of the program structure and programming methods, it is necessary to actually write the PLC program. The PLC control system design needs to go through the following process.
(1) Analyze the controlled object and propose control requirements
Detailed analysis of the process and working characteristics of the controlled object, understanding the cooperation between the controlled object machine, electricity and liquid, proposing the control requirements of the controlled object to the PLC control system, determining the control plan, and drafting the design task book.
(2) Determining input/output devices
Determine all input devices (such as buttons, position switches, transfer switches, and various sensors) and output devices (such as contactors, solenoid valves, signal indicators, and other actuators) required by the system based on system control requirements. Etc.) to determine the input/output devices associated with the PLC to determine the number of I/O points for the PLC.
(three) choose PLC
PLC selection includes selection of PLC model, capacity, I/O module, power supply, etc. See section 2 of this chapter for details.
(4) Allocating I/O points and designing PLC peripheral hardware lines
1. Assign I/O points
Draw the connection diagram or correspondence table of the I/O point of the PLC and the input/output device. This part can also be performed in step 2.
2. Design PLC peripheral hardware circuit
Draw the electrical circuit diagram of the rest of the system, including the main circuit and the control circuit that does not enter the programmable controller.
The electrical schematic of the system is composed of the I/O connection diagram of the PLC and the peripheral electrical circuit diagram of the PLC. The hardware electrical circuit of the system has been determined so far.
(5) Program design
Programming
According to the control requirements of the system, the PLC design is designed using appropriate design methods. The program should meet the system control requirements as the main line, and write the programs that realize the various control functions or sub-tasks one by one, and gradually improve the functions specified by the system. In addition to this, the program should usually include the following:
MPO/MTP Cassette Module possess optical fiber branching patch cords inside to split the 12-core MPO / MTP connector into simplex or duplex LC connector.
Simplex or duplex connectors are placed in front of the modules, and one or two MPO/ MTP connectors are placed at the back of the modules.
The branching patch cord connect the front LC and the near MPO/MTP connectors. This type of modules can be easily installed in 1U and 4U Chassis.Mpo Cassette Module,Cassette Module For 1U Patch Panel,Mpo-Lc Cassette Module,Mpo Cassette Moudle 24F
ShenZhen JunJin Technology Co.,Ltd , https://www.jjtcl.com