Tag Archives: Mitsubishi PLC

What is the meaning of Mitsubishi PLC constant H?

The Mitsubishi PLC constant H represents a hexadecimal number and is mainly used to indicate the operational value of the application function instruction. [extension] K is a symbol indicating a decimal integer. It is mainly used to specify the set value of the timer or counter and the value in the operand of the application […]

How to use the M command in Mitsubishi plc

Mitsubishi plc M: Auxiliary relay (equivalent to the intermediate relay in the electrical diagram). His control method is the same as Y, but there is no output port, just a single device. Like Y, there are coils and normally open, normally closed contacts. When multiple control methods use the same type of Y. At this […]

Mitsubishi plc programming Ladder diagram: motor is rotating for 10 seconds, inversion for 8 seconds, cycle

Ladder diagram: Press X0, M0 is energized and self-locked. At the same time, KT1 is turned on and Y0 is output. At this time, the motor is rotating 10S. When the 10S time is up, T1 disconnects YO, and M1 is powered on and locked. At the same time Y1 output, the motor is reversed. […]

How to use the ALT instruction in Mitsubishi PLC

ALT instruction is alternate output Assume that Y0 is the indicator light. LDP X0 ALT Y0 At this time, Y0 is off, and when X0 is pressed, the indicator lights up. Press again to turn off the light, then press it again. It’s as simple as that, it will alternate output. This can also be […]

How to input Mitsubishi PLC programming instruction MC

Mitsubishi PLC master control MC input method: When writing the MC master command, first press F8 to enter the input command format. Then write MC space N0, space Mx press the confirm button to complete; When the master control speed is fast, press F8 to input MCR, and the space Nx is confirmed and completed. […]


The main reason is that the program written by PLC has made mistakes, some of which may be logical errors, or may be input errors. You have to check it out. Programmable logic controller (programmable logic controller), which uses a class of programmable memory used in its internal storage program, executes user oriented instructions such […]