Malfunction caused by capacitance between PLC input lines – Mitsubishi

Create Date: 2024-8-30 12:03:23|Source: Mitsubishi Electric/Mitsubishi Electric

There is a capacitance between the wires of the cable, and a qualified cable can limit this capacitance to a certain size. It is a qualified cable, when the cable length exceeds a certain length, the capacitance value between the lines will also exceed the required value, when the cable is used for PLC input, the capacitance between the lines may cause PLC malfunction, and there will be many phenomena that cannot be understood. The main ones are:

                                 Malfunction caused by capacitance between PLC input lines – Mitsubishi

The wiring is correct, but the PLC has no input;

The input that the PLC should have is not, and the input that should not be there is, that is, the PLC input disturbs each other.

Recently, when debugging a PLC system, a phenomenon was presented. The MIC sensor does not move, or after the action, the action of another sensor (FLY) affects the MIC sensor, that is, when the MIC is moving, the MIC becomes immobile as soon as the FLY sensor moves. That is: the action of the sensors affects each other, and it is suspected that the quality of the cable is not good, and the capacitance between the lines does not meet the requirements. Directly connect the MIC sensor to the PLC, and after using the cable, all the operation is normal.

More on that
The wiring steps of the input and output circuits of the Mitsubishi PLC The wiring steps of the input and output circuits of the Mitsubishi PLC

The wiring diagram steps of the input and output circuit of Mitsubishi PLC, there are generally three types in the wiring diagram of the input and output of the PLC, one is DC 12-24V input, and there is output, so what about the external input? (1 ...

Mitsubishi PLC control system electroplating production line design Mitsubishi PLC control system electroplating production line design

Planning PLC control system control requirements for electroplating production line: 1) SQ1-SQ4 is the driving advance and retreat limit switch, and SQ5-SQ6 is the upper and lower limit switches. 2) The workpiece is lifted to SQ5 to stop, and the car is driven to SQ1 to stop.

Introduction to the selection conditions of Mitsubishi A840 series inverters Introduction to the selection conditions of Mitsubishi A840 series inverters

Q: When will I choose the A840 series inverter? A: A800 series inverters are generally used in heavy-duty occupations, such as lifting occupations, mixer occupations will use A800 series. At the same time, it is a vector inverter, so customers need to do closed-loop speed control, torque control may ...

Mitsubishi inverter OC causes the failure Mitsubishi inverter OC causes the failure

1. The ERR problem is an under-voltage problem, which is usually caused by the problem of voltage detection loop resistance or wiring, rather than the actual input voltage showing undervoltage. Most of the OC problems of the A200 series are caused by the damage of the drive circuit, and its drive circuit ...

Features of Mitsubishi PLC commonly used models Features of Mitsubishi PLC commonly used models

FX Series PLC: FX3G PLC has a built-in large-capacity program memory, 32K steps, and the basic instruction processing speed can reach 0.21μs in specification mode. In the meantime, the FX series 5U is suitable for any industry, and is used by small and medium-sized enterprises. For example, this year's very popular mask machine is suitable for FX5U, and he can ...

The basic composition of Mitsubishi PLC The basic composition of Mitsubishi PLC

Mitsubishi PLC is composed of power module, CPU module, input module, output module and substrate. Power module: Provides DC5V power supply for each module on the substrate. CPU module: It is the heart of the PLC. The CPU module consists of ...

Mitsubishi participated in the 4th CIIE to introduce the E-JIT green induction solution Mitsubishi participated in the 4th CIIE to introduce the E-JIT green induction solution

On November 5, 2021, the 4th China International Import Expo was grandly held at the National Convention and Exhibition Center in Shanghai. At the 4th CIIE, Mitsubishi Electric's booth was located in Hall 4.1 of the Technical Equipment Zone of the Convention and Exhibition Center, with an exhibition space of 400 square meters. At Mitsubishi Electric's booth, the high-profile event was ...

The working principle of the servo motor of the Mitsubishi CNC system The working principle of the servo motor of the Mitsubishi CNC system

1. The servo mainly relies on the pulse to position, basically it can be understood in this way, the Mitsubishi CNC system repair servo motor receives 1 pulse, it will rotate the angle corresponding to 1 pulse, and then complete the displacement, because, the servo motor itself has the function of announcing the pulse, so the servo motor ...

Mitsubishi Electric Europe Ltd. acquires AQS, a Sweden air conditioning distributor Mitsubishi Electric Europe Ltd. acquires AQS, a Sweden air conditioning distributor

TOKYO, April 2, 2020 - Mitsubishi Electric Corporation (TSE: 6503) announced today that its European subsidiary, Mitsubishi Electric Europe Ltd., acquired all the shares of AQS PRODUKTER AB, a Sweden company in the comfort, craft industry, on April 1.

Mitsubishi FR-A700 series inverter problem Mitsubishi FR-A700 series inverter problem

1. Consultation question: FR-A700 series Mitsubishi inverter, the suffix is ending in -CA1, what kind of inverter? Solution: The suffix -CA1 is a special model with take-up control. 2. Consultation question: FR-A ...

Introduction to the Mitsubishi PLC encryption process method Introduction to the Mitsubishi PLC encryption process method

The encryption process is as follows: ** Open the serial port for the first time [00000000] IOCTL_SERIAL_SET_BAUD_RATE Baud Rate: 9600 (Set baud rate here) [00000000] IOCTL_SERIAL_SET_LINE_CONTROL StopBits: 1, Parity: Ev ...

PLC commonly used physical memory - Mitsubishi PLC commonly used physical memory - Mitsubishi

(1) Random Access Memory (RAM) The user can read out the content of the RAM with the programming device, and can also write the user program to the RAM, so the RAM is also called read/write memory. It is volatile memory, and when its power is interrupted, the stored information is lost. The use of the computer's memory module ...

Mitsubishi Electric develops technology for high-power-density converters with embedded components Mitsubishi Electric develops technology for high-power-density converters with embedded components

TOKYO, March 25, 2020 – Mitsubishi Electric Corporation (TSE: 6503) today announced that it has developed a new technology that integrates power devices, passives, sensors, and other embedded components on the same substrate and performs the dispensing at 100kW (continuous) power.

Mitsubishi PLC control servo motor method Mitsubishi PLC control servo motor method

1. The transistor output type of the FX series generally sends pulses to the servo through the output point of Y0, Y1 or the positioning module, and the speed and direction of the servo depend on the frequency and direction of the pulse in your program. Mitsubishi FX3U series ...

Mitsubishi servo system common alarms and solutions Mitsubishi servo system common alarms and solutions

The use of Mitsubishi AC servo system is mainly composed of three series: MR-ES, MR-J2S, MR-J3. In general, the cause of the fault can be preliminarily determined based on the code displayed on the servo drive, and then troubleshooting: 1、AL. E6 - Indicates ...

Mitsubishi inverter capacity and capacity selection Mitsubishi inverter capacity and capacity selection

The capacity (non-functional) of the Mitsubishi inverter for the drive motor can be understood from the change in energy flow determined by the operation method. 1. When accelerating or operating at constant speed The efficiency of the inverter is the output current, that is, ...

Modbus communication and address assignment for Mitsubishi PLC Modbus communication and address assignment for Mitsubishi PLC

When using Modbus communication in Mitsubishi PLCs, it is necessary to understand the address allocation of different register types. The following are the common types of Mitsubishi PLC Modbus addresses and their corresponding functions: 1. Coil Register: ...

The relationship between torque and performance of Mitsubishi servo motors The relationship between torque and performance of Mitsubishi servo motors

1. Additional torque The torque that occurs on the motor shaft under additional voltage, extra load is called the extra torque of the motor. 2. Starting torque The torque generated by the motor at the moment when a voltage is applied to the motor in the aborted condition is called the starting torque. The starting torque characterizes the electrical...

What are the main factors of interference in Mitsubishi PLC system? What are the main factors of interference in Mitsubishi PLC system?

(1) Radiative dry disturbance from space The radiated electromagnetic field (EMI) in space is mainly caused by power networks, transient processes of electrical equipment, lightning, radio broadcasting, television, radar, frequency induction heating equipment, etc., generally known as radiation disturbance, and its dispersion is extremely chaotic. ...

Mitsubishi controller and driver function and function Mitsubishi controller and driver function and function

Functions and functions of the Mitsubishi controller: To control the speed of the motor, the controller is also required to have corresponding maintenance functions such as brake power-off, under-voltage maintenance, under-voltage recovery value setting, over-current maintenance, etc. Some of the smart energy controllers also have multiple riding modes and have an electric ...

CATEGORIES BYPASS
Customer Service Center

Online Consultation:QQ


ContactContact

Contact: Manager Huang

Contact QQ: 3271883383

Contact number: 13522565663


Scan the code to add WeChat (please save the picture first on the mobile phone)

working hoursworking hours

Weekdays: 9:00-17:00

Holidays: Only emergencies are handled

Contact us

Contact us

Contact number QQ consultation
QQ consultation

3271883383

Company address
Back to top