How to distinguish air switch and isolating switch during the execution of Mitsubishi PLC return to origin program

1. The execution process of Mitsubishi PLC return to origin program: Pulse output returns to the origin at high speed. When the origin switch is detected, it decelerates and runs. When the speed reaches the crawling speed, it reverses and returns at the crawling speed.

2. How to distinguish between air switch and isolating switch Air switch QF Isolating switch QS

3. How to connect the current transformer to the single-phase meter

4. Three basic quantities you need to know when learning PLC Digital quantity: 0 and 1 ON OFF Analog quantity: voltage, current, pressure, speed, etc. Pulse quantity: rising edge and falling edge

5. Judging the resistance value from the color: Brown is one, red is two, orange is three, four, yellow is five, green is six, blue is seven, purple is eight, gray is nine, white is tight, five, silver is ten, table error

6. The data types that must be learned in PLC: bit, byte, word, double word, integer, double integer, real number, etc.

7. Selection of motor power and current wires

8. Forward and reverse control relay circuit

9.PLC controls forward and reverse rotation

10. Comparison between circuit diagram and PLC program diagram

11. Common alphabetic symbols for electricians

12. The difference between electrical diagram and PLC ladder diagram

13. Conversion and relationship between analog and digital quantities

14.Electrical control and PLC program

15. Two working modes after PLC is powered on: running mode and stop mode

16. How to identify the contactor coil

17. Choose the appropriate accessories according to the motor power

18. Introduction to common electrical instruments

19.Electrical forward and reverse control circuit

20. Electrician's Troubleshooting Tips

21. Nameplate parameters of three-phase asynchronous motor