GE 350-E-P0-G0-HEENN-SN-NN On site interface module
When planning the PLC system, 350-E-P1-G1-HEMCN-3E-DN should first determine the control plan, and the next step is to select the PLC engineering plan.
The characteristics and application requirements of the process flow are the primary basis for planning and selection. The PLC and related equipment should be integrated and standardized. The 350-E-P1-G1-HEMCN-3E-DN should be selected based on the principle of easy integration with industrial control systems, and the 350-E-P1-G1-HEMCN-3E-DN should be easy to expand its functions. The selected PLC should be a mature and reliable system that has been put into operation in the relevant industrial field. The system hardware, 350-E-P1-G1-HEMCN-3E-DN software equipment, and functions of the PLC should be consistent with equipment planning and control requirements.
Familiarity with programmable controllers, 350-E-P1-G1-HEMCN-3E-DN function diagrams, and related programming languages can help shorten programming time
Special attention should also be paid to the following points in input wiring:
(1) The input wiring should generally not exceed 30m. But if the environmental interference is small and the voltage drop is not significant, the input wiring can be appropriately longer.
(2) The input and output lines cannot use the same cable, and the input and output lines should be separated.
(3) The width of the pulse signal that the programmable controller can accept should be greater than the time of the scanning cycle.
Output wiring:
(1) Programmable controllers come in three forms: relay output, thyristor output, and transistor output.
(2) The output terminal wiring is divided into independent output and common output. When the output relay or thyristor of the PLC is activated, two output terminals of the same number are connected. Different types and voltage levels of output voltage can be used in different groups. But the outputs in the same group can only use the same type and voltage level of power supply.
(3) Due to the output components of PLC being encapsulated on the printed circuit board and connected to the terminal board, if the load connecting the output components is short circuited, it will burn out the printed circuit board. Therefore, fuse protection should be applied to the output components.
(4) When using relay output, the size of the inductive load it bears affects the working life of the relay, so the relay requires a long working life.
(5) The output load of PLC may generate noise interference, so measures should be taken to control it.
In addition, for hazardous loads that can cause harm to users, in addition to considering them in the control program, external emergency stop circuits should also be designed to cut off the power supply of the load that causes harm when the programmable controller fails.
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