Discrete control and motion control, Mitsubishi's instructions are abundant, there are special positioning instructions, control servo and stepping are easy to finish, to end some messy action control is also Mitsubishi's strength, and Siemens is weaker in this area, there is no special instruction, do servo or step positioning control is not not unfinished, but the program is chaotic, and the control accuracy is not as good as Mitsubishi.
Process control and communication control Siemens is a strong point, Siemens' analog module is cheap and the program is simple, while Mitsubishi's analog module is expensive and the program is messy, Siemens is also easy to communicate, the program is simple, and Mitsubishi is weak in this function. Therefore, for different equipment and different control methods, we must reasonably choose PLC, use its strengths, and avoid its shortcomings. For example, if a certain equipment is only controlled by some actions, such as a manipulator, Mitsubishi's PLC can be selected, and if a device has a servo or stepper to be controlled by positioning, Mitsubishi's PLC can also be selected; Like central air conditioning, sewage treatment, temperature control, etc., there are many analog quantities to be processed, it is more appropriate to choose Siemens' PLC, and there are many instruments on site to collect data with communication, and Siemens is a good control. The difference is very large. The chips are certainly different (reflected in capacity and computing speed), but the biggest difference is still reflected in the programming software.
Ideas and structures
Personally, I think that the software of Mitsubishi (a Japanese mid-to-high-end brand) PLC is at least 5 years behind Siemens. Putting aside the large and medium-sized ones, let's compare Mitsubishi's advantageous small machine FX series with Siemens S7-200 series.
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Mitsubishi PLC FX series programmers and other peripherals
1. FX series programmer
The programmer is an important peripheral device of the PLC, which is used to write the user program to the PLC user program memory. On the one hand, it can be programmed by the PLC, and on the other hand, it can monitor the working status of the PLC. With the development of PLC skills, the multi-...
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PLC Programming Recommendations – Mitsubishi PLC
1. When the PLC and the host computer (or touch screen) form a monitoring system, there are many hours on the screen that require "manual", "active" and other control forms (generally more than one). In the program, you can use the "MOV" command. For example, when selecting "manual", the constant 1 MOV will be changed to a ...
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The cause of the failure caused by OC - Mitsubishi inverter
1. Aging of drive circuit
Due to the long-term use, it will inevitably lead to the aging of components, and then cause the drive waveform to be distorted, and the output voltage will be unstable, so OC alarm often appears as soon as it is running.
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How to configure the mechanical torque period of the inverter - Mitsubishi inverter
1. The starting torque that makes the mechanical equipment roll from a standstill state is usually positive, and generally larger than the torque required to maintain constant velocity movement, such as most feeders, material conveyors, mixers, mixers, etc., it may reach the additional torque of the Yuan Yuan Yuan Yu Yao Yuan Yuan ...
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Review and comparison of Mitsubishi PLC control inverter methods
1. The switching signal of PLC controls the inverter
The output point and COM point of the PLC (MR type or MT type) are directly connected to the STF (forward engine), RH (high speed), RM (medium speed), RL (low speed), and input SG ports of the inverter. The PLC can be programmed to control the inverter's start, ...
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Mitsubishi servo motor is now commonly used
1. Torque control: Torque control is based on external simulation simulation type or direct address assignment to set the output torque of the motor shaft. For example, 10V matches 5Nm. When the external simulation simulation is set to 5V, the output of the motor shaft is 2.5Nm. If the load on the motor shaft is less than 2.5Nm, ...
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Mitsubishi Electric instruction format
(1) Arbitrary axis AC command (G140)
G140 Instruction Address = Axis Address Instruction Address = Axis Address ... ;
Command Address: Arbitrary Axis AC Command (G140) After that, specify the 1-character address set by the parameter (#12071-#12078) to be used for moving commands, etc.
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How Mitsubishi PLC works
A. A scanning cycle is divided into input sampling, program fulfillment, and output rewriting.
B. Each scanning process. The convergence samples the input signal. The convergence rewrites the output signal.
C. Component image register ...
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Mitsubishi Electric develops production line improvement technology
TOKYO, March 26, 2020 – Mitsubishi Electric Corporation (TSE: 6503) announced today that it has developed a new technology for efficient design and material flow of production floor layouts and accurate estimates ® of productivity using Mitsubishi Electric's Maisart *AI.
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Mitsubishi PLC product line analysis
FX1S Series:
Mitsubishi PLC is an integrated small unit type PLC. And it has intact functions and communication functions and other scalability. If you consider the space and cost of the installation, it is an ideal choice.
FX1N Series:
It is a popular PL with strong functions launched by Mitsubishi Electric ...
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Mitsubishi inverter overload fault judgment method
1. Check whether the three-phase electricity of the motor is balanced
(1) If the three-phase voltage of the motor is unbalanced, then check whether the three-phase voltage at the output end of the Mitsubishi inverter is balanced.
(2) If the three-phase voltage of the Mitsubishi inverter is also unbalanced, the problem is inside the Mitsubishi inverter, and it should be investigated.
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Internal data structure of the Mitsubishi PLC FX series
A lot of data is used in the internal structure of the PLC and in the user's use program. These data have the following ways in terms of structure or number system.
(1) Decimal number
Decimal numbers are also known as word data in PLC. It is first and foremost ...
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Precautions for the use of Mitsubishi L series PLC terminal cover
Mitsubishi L series PLC is the same as Q series PLC is a modular PLC, in the specific engineering application, users according to the actual needs of the CPU, power supply, input and output and other special function modules for combination. However, there is a difference between the L series PLC and the Q series PLC in terms of hardware composition.
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Features of Mitsubishi PLC programming language
1. Graphical instruction structure: The program is expressed graphically, and the instructions are composed of different graphic symbols, which are easy to understand and remember. In the logic operation part, almost all manufacturers use a ladder diagram similar to the relay control circuit, which is easy to accept. More complex arithmetic operations, ...
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One-button adjustment function for Mitsubishi servo motors
After the first installation of different servo motors on the machine, they may be poorly matched to the machine during operation, resulting in vibration, noise and other phenomena.
The cause of the problem is a mismatch between parameters such as the rigidity of the servo motor and the load-inertia ratio and the machinery. Due to the large number of parameters that affect ...
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Mitsubishi FX5U series PLC advantages
1. CPU function
As a MELSEC IO-F series PLC actuator, it is equipped with executable structured programs and multiple program actuators, and can be written to ST language and FB.
2. Built-in analog input and output (alarm output by the way)
Built-in 12-bit 2-channel analog input ...
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Pay attention to the wiring of the Mitsubishi PLCI/O terminal
1. Enter the wiring
(1) The input wiring should generally not exceed 30 meters. However, if the environmental disturbance is small and the voltage drop is not large, the input wiring can be appropriately longer.
(2) The input/output lines cannot be separated by the same cable, and the input/output lines should be separated.
(3) As far as possible, choose normally open ...
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Mitsubishi FX5U series PLC ten advantages
1. CPU function
As a MELSEC IO-F series PLC actuator, it is equipped with executable structured programs and multiple program actuators, and can be written to ST language and FB.
2. Built-in analog input and output (alarm output by the way)
Built-in 12-bit 2-channel analog input ...
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Mitsubishi AnS series analog module bias and gain applications
In today's industrial field, when using analog-to-digital conversion or digital-to-analog conversion, most of them do not only use the standard input characteristics of -10V-+10V, 0-20mA, but according to the practical voltage and current values to do the process requirements, then it is necessary to do the AD or DA module ...
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Mitsubishi PLC Programming FAQs
1. Can the PLC of FX1N be extended to connect with FX2N's input and output modules, positioning modules, analog modules, etc.?
The PLC of the FX1N is fully capable of expanding the expansion modules connected to the FX2N. Such as FX2N-16EX, FX2N-16EYR, FX2N-4A...
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