Industrial Ethernet is a field bus developed based on Ethernet system that is more suitable for use in industrial production environments. Currently, the mainstream types of industrial Ethernet include: 1. MODBUSTCP/IP, which was developed by French Schneider company. 2. Ethernet/IP, which is an industrial Ethernet type developed by Rockwell Corporation of the United Sta...
The main difference between single-mode fiber and multimode fiber lies in transmission distance, bandwidth and dispersion. 1. Transmission distance: The transmission distance of single mode fiber is much longer than that of multimode fiber. Since the light of single-mode fiber can only propagate along the central axis, the attenuation and dispersion of the signal can be...
Among them, the rotor can be divided into three parts: rotor 1, rotor 2, and permanent magnet steel. Sometimes there are ball bearings inside to reduce friction and vibration when the rotor is working. Common stepper motors are all open-loop controlled, that is, they work unilaterally by receiving motion instructions from the controller, and do not feed back information ...
Some people think that a voltage exceeding a certain volt is strong electricity, and a voltage lower than a certain volt is weak electricity. The so-called strong electricity refers to the electricity that is mainly used for energy transmission, such as electric fans will turn when they are supported by electricity, lights will turn on when they are supported by electri...
From a macro point of view, the servo drive is mainly divided into two parts, the power board and the control board, among which the power board is the strong current part, and the control board is the weak current part. The power board can be subdivided into two units, namely the power drive unit IPM and the switching power supply unit. Here, the power drive unit is use...
CANBUS, also known as controller area network, was developed by Bosch, a giant in the German automotive electronics industry. It is mainly used for node connection of automotive power systems. It has the advantages of low communication delay, many connection nodes, self-error detection, and long communication distance. So, what is the topology of CANBUS?
It can be connected to a PLC that supports CANopen communication through the CANopen bus and act as a slave tool for the PLC. We know that the realization of the functions of controllers such as PLC relies on a number of digital and analog IOs. However, the number of local IOs of PLC is limited after all. If we encounter projects with complex control content, it is nece...
Compared with the ordinary motor, the servo motor has an encoder structure, which will move synchronously with the motor rotor, continuously collect the torque, speed and position information of the motor movement, and feed it back to the driver to continuously correct the error. All kinds of projects that require high control precision will give priority to integrated s...
The GCAN Ethernet CAN gateway is a data converter integrating one Ethernet interface and two CANBUS interfaces, which can be connected to a computer and CANBUS communication equipment to realize computer control or information monitoring of other equipment. In order to establish a connection between the computer and the GCAN Ethernet can gateway, we must first place the...
Before actual use, we need to make various settings on it, one of which is to change the IP address of the computer. So, what is the process of changing the IP? First, we need to restore the IP address of the CAN/Ethernet gateway to the default settings, such as 192.168.1.10, and the subnet mask is 255.255.255.0. Look at the subnet mask and know that if you want to be ...
S-type thermocouple IO generally refers to the type of IO interface on the PLC for temperature analog signal acquisition, and can also refer to the temperature acquisition IO expansion module that the combined PLC can expand. Next, let's talk about the advantages and disadvantages of S-type thermocouple IO. The pair wire positive and negative poles of S-type thermocouple...
CAN to fiber optic repeater, also called fiber optic CAN bridge, is a tool for transmitting data by means of optical signals instead of CANBUS electrical signals. The setting method of the fiber optic CAN bridge is relatively simple, only involving the setting of the baud rate. Next, let's talk about two methods of setting the baud rate of GCAN's fiber optic CAN bridge.
One Ethernet port and two CAN ports are integrated on the Ethernet CAN device, which can realize the intercommunication between computer and CANBUS communication equipment. Before using the device, we need to set the communication mode of the gateway. At present, the common Ethernet CAN gateway communication modes include TCP and UDP.
What are the units of data volume that we often hear? There are KB, MB, GB, TB, etc. The conversion relationship between them is 1TB=1024GB, 1GB=1024MB, 1MB=1024KB.
It is generally connected to the PLC through the bus to realize precise control of position, speed and torque. Sometimes, we will find that the servo motor vibrates greatly when it is working. What is the reason? The first possibility is that the PID gain adjustment is too large, especially after adding D. Therefore, we should try to increase P, reduce I, and try not t...
The full name of IP level is IP protection level, which is the dustproof and moisture proof ability level of electrical equipment stipulated by the IEC Association. Among them, I in IP refers to the dustproof level, and P is the moisture proof level. Regardless of whether it is I or P, the larger the value, the higher the protection level. For example, if the value of ...
The input IO port is responsible for collecting digital or analog signals, digital signals are PNP/NPN input signals, counter signals, etc. The analog input IO signal is divided into current analog input IO signal, voltage analog input IO signal, temperature analog input IO signal, pressure analog input IO signal and so on. The output IO is responsible for the output an...
CAN analyzers are usually also called USBCAN analyzers, because they have a USB interface integrated on them, which can be connected to a PC. So, what can we do with a CAN analyzer? Let me briefly introduce: 1. First of all, it is to view the CANBUS data of the target CAN device, which can be visualized by the CAN analyzer. 2. Perform format conversion of CAN data, such ...
It allows the motor to achieve closed-loop control, allowing it to have higher control accuracy and be able to cope with more demanding control items. At present, the most common servo encoders mainly include incremental and absolute value types. What are the differences between them? Why do people prefer absolute encoders? In comparison, incremental encoders have high...
What is a Bus? The Bus is a public communication line, any device can connect to it. For example, now there are three devices A, B and C connected to the bus, if A wants to communicate with B, that is, A sends information to the bus, and B receives data from the bus. B can communicate with C in the same way. If there is no Bus and the three devices want to communicate wi...
First of all, we have to mention two professional terms, rotor and stator. The rotor is the part that rotates and is usually attached to the drive structure, while the stator is the non-moving part that is attached to a stable structure. For DC motors, it can be divided into brushed DC motors and DC brushless motors according to the type of steering gear. Among them, ...
Servo motors generally refer to various motor systems with encoder structures that can perform motion state feedback. When we select the type of servo motor, we are most concerned about the speed, torque and displacement accuracy of the motor. Of course, the reliability and stability of the motor is also very important. The larger the torque of the motor, the stronger th...
The integrated servo motor is a system that combines the drive encoder and the motor, and it looks like a motor from the outside. So, what are its advantages? Let’s find out. The integrated servo motor is a servo system developed based on the DC low-voltage power supply method, which adopts a permanent magnet synchronous motor and FOC drive method. At the same time, it s...
EtherCAT and PROFINET are both real-time Ethernet-based fieldbuses that are used in industrial automation applications. Both protocols have 100Mbps baud rate, and use Ethernet as the base layer in the communications stack, which has around 2000 bytes per transaction. EtherCAT is known for its high speed and low latency, which makes it ideal for applications that require ...
The CPU is an important part of a computer system, and the same is true for PLCs. Unlike computers, PLC CPUs often do not require a high main frequency, but are more inclined to stability and standardization. We sorted out the CPU manufacturers corresponding to the PLC produced by each company and their main frequency. By reading this article, you will have a certain und...
Basic introduction to PLC A Programmable Logic Controller (PLC) is a computer designed to operate reliably under harsh industrial environments such as extreme temperatures, wet, dry, and/or dusty conditions. PLCs are used to automate industrial processes such as a manufacturing plant’s assembly line, an ore processing plant, or a wastewater treatment plant. They were in...
It is used to establish client-server communication between intelligent devices. Modbus has become a standard communication protocol and is now a commonly available means of connecting industrial electronic device. It is popular in industrial environments because it is openly published and royalty-free. There are mainly three variants of Modbus protocols: Modbus RTU (...
The main difference between DCS (Distributed Control System) and SCADA (Supervisory Control and Data Acquisition) systems is the scale at which they are used and the level of control they provide. About DCS DCS systems are used for smaller-scale, distributed control of industrial processes. They place a greater emphasis on process control and include a supervisory contr...
The higher a baud rate is, the faster the data is sent/received. Baud rate is commonly used when discussing electronics that use serial communication. In the serial port context, “9600 baud” means that the serial port is capable of transferring a maximum of 9600 bits per second. Serial communication is the process of sending data one bit at a time, sequentially, over a c...
The permanent magnet servo motor belongs to the category of AC servo. The structure of the motor is that the stator is a winding coil, and the rotor is a permanent magnet. There is no carbon brush structure inside. The rotor is commutated through an electronic commutator. It has many advantages, including: 1. The permanent magnet servo motor has a high power factor. 2....
Engineers want servo systems to do exactly what they want them to do. So how can the servo system achieve this? Very simple, it adds an encoder structure compared to ordinary motors. In actual work, the PLC is connected to the motor driver through the bus or pulse, and the driver will receive the feedback pulse sent by the encoder while driving the motor to realize a cl...
Recently, China Industrial Control Network released the “China PLC Market Analysis Report 2023“, which conducted a comprehensive survey and analysis of the development status, market size, competitive landscape, application fields and other aspects of China’s PLC industry. The report pointed out that with the advancement of strategies such as Industry 4.0 and intelligent...
There are 3 modes of device/node communication: master/slave, client/server and producer/consumer. letter of agreement Protocols used for communication, such as configuring nodes (SDO) or transmitting real-time data (PDO), etc. device status A single device supports different states. A "master" node can change a "slave" node, including operations such as reset. object di...
In detail, DC motors can be divided into DC brush motors and DC brushless motors. There are commutator and carbon brush structures in brush motors, and brushless motors use electronic steering devices instead of carbon brushes for rotor steering. AC motors can be divided into synchronous AC motors and asynchronous AC motors. Among them, the stator of the synchronous AC m...
The definition of data information by the sender and the receiver needs to follow a common standard. Compared with the CAN bus underlying protocol, which includes the physical layer and the data link layer, CANopen is a high-level protocol including five layers: the network layer, the transport layer, the session layer, the presentation layer, and the application layer....
Gantry cranes are mainly used for loading and unloading operations of outdoor cargo yards, material yards, and bulk cargo. To manufacture large ships, giant gantry cranes are essential. In addition, the loading and unloading of containers in ports requires the participation of gantry cranes. To make the gantry crane work efficiently, PLC is essential. It can realize the...
