Firstly, determine whether the PLC is a source input or a drain input, and then select the type it supports Number of encoders. The source type is current outflow, and the drain type is current inflow. Due to the different designs and uses of PLCs by various brand manufacturers, the definitions of source and drain types are relatively different (for example, Mitsubishi's definition is exactly opposite to Siemens' definition). Mitsubishi's source input and drain input are both relative to the PLC common terminal (COM terminal or M terminal), where current flowing out is the source type and current flowing in is the drain type. Siemens' source input and drain input are both relative to PLC input terminals, with current flowing out being the source type and current flowing in being the drain type.             The output OUT terminal ...

1、 Material Selection Guide 1. Plastic materials Plastic is one of the most commonly used 3D printing materials due to its wide selection and relatively low cost. The most common plastic materials include polyvinyl ketone (PEEK), ABS (acrylonitrile butadiene styrene copolymer), PLA (polylactic acid), and nylon. Every type of plastic has its advantages and disadvantages, so choosing the material that suits your project needs is very important. -PEEK: PEEK is a high-performance polymer with excellent heat resistance, corrosion resistance, and chemical stability. It is usually used to manufacture parts that require high temperature and chemical corrosion resistance. -ABS: ABS is a common plastic material with good strength, impact resistance, and heat resistance. It is suitable for manufacturing large and durable parts. -PLA: PLA is a biodegradable p...

There are multiple ways to communicate between Siemens WINCC6.0 and Siemens PLC. Below are two commonly used communication methods. 1、 The prerequisite for using a regular network card to communicate with the PLC through TCP/IP and connecting WICC6.0 to the PLC system through Ethernet is that the PLC system is configured with an Ethernet module or uses a PLC with a PN interface, such as CP443-1 or CP343-1, and a PLC with a PN interface, such as CPU 315-2PN/DP. The following is a communication connection using a regular network card CP443-1. 1. STEP7 Hardware Configuration Use STEP7 programming software to configure the hardware of the PLC system. Insert the actual PLC hardware into the "Hardware" configuration window, as shown in Figure 1: Figure 1 STEP7 Hardware Configuration 2. Double click CP443-1 ...

1. Fault code analysis method If the ABB frequency converter has a fault, there are corresponding fault codes on the operation panel. Generally, when dealing with frequency converter faults, it is necessary to find its fault code on the operation panel and conduct a deeper analysis based on the fault code. Based on my personal experience in frequency converter maintenance and some common fault codes, I will briefly discuss some common fault handling methods. 1.1 Fault code: BRAKEFLT Reason for malfunction: Brake failure, brake opening timeout or brake not opening properly. Solution: Open the cover of the brake on site, forcefully open the brake coils in the program, observe the limit opening status of the brake, and if the brake cannot be opened or the mechanism is stuck, replace the brake; If the distance between the limit opening and the limit sensing piece is far...

(1) Fault 1: Touch deviation Phenomenon 1: The position touched by the finger does not coincide with the mouse arrow. Reason 1: After installing the driver program, there was no vertical touch on the center position of the bullseye during calibration. Solution 1: Recalibrate the position. Phenomenon 2: Some areas have accurate touch, while others have deviation in touch. Reason 2: The accumulation of a large amount of dust or scale on the surface acoustic wave reflection stripes around the surface acoustic wave touch screen affects the transmission of acoustic signals. Solution 2: Clean the touch screen, paying special attention to cleaning the sound wave reflection stripes on all sides of the touch screen. When cleaning, disconnect the power supply of the touch screen control card. (2) Fault 2: Touch screen does not respond to touch Phenomenon: When touching the scree...

Operation content: Establish communication between the touch screen and PLC to enable the touch screen to read and write PLC data Communication method: Touch screen communicates with PLC through DP Download line: USB/PPI Precautions for operation: Firstly, in STEP 7, perform hardware configuration (without attaching the HMI as a slave to the PROFIBUS bus, as the HMI is a secondary master), set the DP address and baud rate Then, set the connection parameters in the touch screen programming software (note that the connection parameters should be consistent with those in STEP 7) Finally, transfer the touch screen program to the touch screen via a download cable After successful transmission, it indicates that the program has been successfully downloaded to the touch screen  ...

Operation content: Establish communication between the touch screen and PLC to enable the touch screen to read and write PLC data Communication method: Touch screen communicates with PLC through DP Download line: USB/PPI Precautions for operation: Firstly, in STEP 7, perform hardware configuration (without attaching the HMI as a slave to the PROFIBUS bus, as the HMI is a secondary master), set the DP address and baud rate Then, set the connection parameters in the touch screen programming software (note that the connection parameters should be consistent with those in STEP 7) Finally, transfer the touch screen program to the touch screen via a download cable After successful transmission, it indicates that the program has been successfully downloaded to the touch screen  ...

Regarding the issue of not being able to read the value, if there is always no change in 32767, the value already exists, it is just an overrange. If the value is 0, then attention should be paid to whether there is a problem with the analog quantity. Using a multimeter to measure the on-site signal does not exceed the limit. Why do these two phenomena occur? This is because the selected reference potential is different. For example, if the signal coming from the site is 5V, the first thing to ask is what voltage is the reference point? 10-15 is 5V, and -10~-5 is also 5V. If the reference point of the measuring end is 0V, there will be a problem with the measurement, so it is necessary to ensure that both ends are equipotential. The reference potential point of the analog module is MANA, and all wiring is related to it. 02Isolation and Non Isolation Issues Series Th...