In PLC applications, it is not recommended to directly connect the alarm to the output terminal, especially in safety alarm and emergency handling situations.  PLC output modules are divided into relay output type and transistor output type. The former is suitable for driving high-power loads, while the latter is not suitable.  The working current and voltage of the alarm are relatively high, and direct connection may damage the PLC or cause safety issues. When using a relay output PLC,  the alarm can be connected to the output terminal, but attention should be paid to independent power supply, reasonable control signal, reliable reset operation,  and alarm safety performance. When designing an alarm system, appropriate solutions should be selected based on the PLC output type and load characteristics to  ensure system reliability. In the app...

What are PLC and RTU? What is the difference between the two? I believe many people are at a stage where they roughly know what it is, but cannot accurately say it.  This article will tell you in detail!   What is PLC PLC (Programmable Logic Controller) can be used as a programmable controller, and its most basic and widespread application field is to replace traditional relay  circuits and achieve logic control and sequence control. PLC consists of CPU and input/output modules.   It has multiple control functions, data acquisition, storage and processing functions, mathematical operation functions, and input/output interface conditioning  functions. In addition, there are communication networking functions, human-machine interface functions, and editing and debugging functions. Mainly applied  in traditional industrial control f...

Several methods of program protection for S7-1500   The program protection methods for S7-1500 and S7-300/400 are not exactly the same   1. Read protection   In the hardware configuration, open PLC Properties - Protection to set access permissions as needed. When selecting three protection levels other than "full access  permission (no protection)", an access password needs to be set. Protection level: No protection, write protection, read-write protection, fully protected (password required for upper computer communication)   2. Protection of proprietary technology for program blocks The 1500CPU program blocks, including OB, FC, and FB, all support encryption functionality. DB also supports encryption function. After encryption, the attribute is  read-only, and variables can be seen, but they cannot be added or deleted. Right c...

It is important to determine the reference potential point   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 MA...

Flexible robots and rigid robots are both types of industrial robots, and the main difference between them lies in their structure and usage:   Structure: Flexible robots typically have more flexible body cavities and/or joint structures, allowing for more complex form transformations, while rigid robots are  composed of rigid rods and their joint connections, with relatively fewer degrees of freedom in motion.   Control method: Flexible robots usually use force and visual perception based control systems, while rigid robots mainly use programming control.   Application areas: Flexible robots are mainly used in healthcare and service robots, such as surgical robots, rescue robots, grass cutting robots, etc; Rigid robots are  mainly used in automated production equipment such as assembly, spot welding, painting, cutting, etc. on industrial production lines...

With the continuous advancement of automation, the demand for robots in factory production lines is increasing day by day. In recent years, global robotics giant ABB has closely followed the pulse of the market and launched a series of innovative products. Recently, ABB Robotics has expanded its product lineup of modular industrial robot arms and launched two robots, IRB 7710 and IRB 7720, which offer 16 new variants designed specifically for various applications.   Module design Traditional industrial robots are usually designed in a single way and cannot meet the differentiated needs of different application scenarios. ABB's modular robots break this constraint by standardizing and modularizing components such as the base, lower arm, upper arm, and wrist, making it easy to assemble dozens of different models and specification...

When it comes to rigidity, let's first talk about stiffness.   Stiffness refers to the ability of a material or structure to resist elastic deformation under stress, and is a characterization of the difficulty of elastic deformation of a  material or structure. The stiffness of materials is usually measured by the elastic modulus E. Within the macroscopic elastic range, stiffness is the proportional  coefficient between the load and displacement of a component, that is, the force required to cause a unit displacement. Its reciprocal is called flexibility, which is the  displacement caused by a unit force. Stiffness can be divided into static stiffness and dynamic stiffness.   The stiffness (k) of a structure refers to the ability of an elastic body to resist deformation and tension. k=P/δ P is the constant force acting on the structure, and &delta...

IPC industrial control computer is a reinforced and enhanced personal computer. Due to its stable performance, rich software, and relatively low price, IPC industrial control computer stands out in the industry and is increasingly widely used. Currently, IPC industrial control computer has been applied in communication, industrial control field, road and bridge toll collection, medical care, environmental protection, and various aspects of people's lives.   The definition of industrial control computer is industrial control computer, also known as industrial computer or industrial computer, abbreviated as IPC in English. Simply put, it is a computer designed for industrial sites. What are the technical characteristics of IPC industrial control computers?   Technical characteristics of IPC industrial control computer:   1. The use of fully tempered...