1、 Debugging:With PG card: A1-02 (control mode selection)=1 or 3 (with PG card control)Change to 0 (no PG card, V/F control) (Change control mode parameters after unplugging PG card) The alarm that frequently occurs after changing the control mode: H1-06 (function selection and setting of terminal S8) is changed to F (blocking the function of this terminal). Change H3-05 (multi-functional analog input terminal A3 function selection and setting) to 1F (disable this terminal function). CPF06 (selection card connection failure). After changing the alarm parameters, power off and restart. If there is still an alarm, upload the parameters to restore the factory settings. Parameter copying function:o3-01=  0 ：  Normal action 1 ：  READ (frequency converter → operation panel)2 ：  COPY (operation panel → frequency converter)W...

Common faults and solutions of solenoid valves How to deal with the malfunction of the solenoid valve The rated voltage of the solenoid valve coil is DC12V DC24V、AC24V（50/60Hz）、AC110V（50/60Hz） 、AC220V（50/60Hz） 、AC380V（50/60Hz）。 Generally, in electrical design, either AC220V (no need to install switch power supply, low cost, simple circuit and easy maintenance) or DC24V (commonly used safe voltage, switch power supply/solenoid valve coils are easy to repair and replace) is used. Common faults of solenoid valves include: 1. Coil short circuit or open circuit:Detection method: First, use a multimeter to measure its continuity. If the resistance value approaches zero or infinity, it indicates that the coil is short circuited or open circuited. If the resistance value is measured to be normal (about tens of ohms), it does not necessarily mean...

With the continuous development of society, automation technology has been widely applied in various fields. Especially in the field of industrial automation, the emergence of various automation equipment and systems has improved production efficiency and product quality, while reducing production costs, injecting new impetus into the development of enterprises. The importance of communication protocols and standards in industrial automation is self-evident. This article will explore communication issues in industrial automation from two aspects: communication protocols and standards. 1、 Communication ProtocolCommunication protocol refers to the communication rules agreed upon by various devices during communication, which determines how information is transmitted and processed between devices. In industrial automation, there are many types of communication protocols, such as M...

The differences in communication protocols are reflected in transmission methods, data formats, etc. Their purpose is to achieve effective communication between and with systems. Different communication protocols have different characteristics such as speed and stability, and their applications cover multiple fields such as industrial control and services. The TCP/IP protocol is commonly used for network connections and provides reliable byte stream services. The UDP protocol has fast transmission speed but no connection guarantee, making it suitable for scenarios that require high real-time performance. The Modbus protocol is widely used in the field of industrial automation, supporting communication between various electrical devices. The CAN bus protocol is used in fields such as automobiles due to its high anti-interference ability and multi master station capabili...

Each instrument has its own unique communication protocol, commonly including Modbus communication protocol, RS-232 communication protocol, RS-485 communication protocol, HART communication protocol, etc. So, how do these communication protocols work and what are they What are the advantages and disadvantages? This article will focus on introducing several common communication protocols currently available! Assist instrument personnel in learning. Communication protocol: also known as communication protocol, refers to an agreement between communication parties on the control of data transmission. The agreement includes provisions on data format, synchronization method, transmission speed, transmission steps, error detection and correction methods, and control character definitions A regulation that both parties in communication must comply with, also known as link contro...

PROFIBUS-DP (Process Field Bus Decentralized Peripheral) is a communication protocol used in the field of industrial automation, primarily for efficient and reliable data exchange between master and slave stations. 1. Network planning and cabling: Before designing and implementing a PROFIBUS-DP communication network, network planning and cabling are necessary. This includes determining the physical location of the master and slave stations, determining the bus length and topology, selecting appropriate network cables and connectors, and ensuring that parameters such as cable length, packaging, and terminal impedance meet regulatory requirements. 2. Selection of master and slave stations: Select appropriate PROFIBUS-DP master and slave station equipment based on system requirements and communication needs. The master station equipment usually has s...

The use of PROFINET network communication in industrial sites is becoming increasingly common. Most users are only familiar with the usage of PROFINET network, and know very little about the underlying working mechanism of PROFINET. With the increasing number of PROFINET device nodes, the scale of the network is becoming larger and more complex than before. Many users have encountered various problems due to improper use during the usage process. Below, I will introduce a case of network failure caused by improper use. The control network of a certain tobacco factory in the silk processing workshop uses PROFINET network. On site reports indicate that PROFINET control networks often experience network interruptions. The network topology on site is shown in Figure 1. From Figure 1, it can be seen that the PLC of S7-400 is conn...

Liquid level transmitter is a widely used measuring instrument in the field of industrial automation, mainly used to measure the liquid level height of containers such as storage tanks and pipelines. Proper use and maintenance of liquid level transmitters is one of the important measures to ensure safe production. This article will introduce the safe operation and maintenance procedures for liquid level transmitters. 1、 Safety operating procedures for liquid level transmitters 1. Understand the technical parameters and scope of use of liquid level transmitters Before using the liquid level transmitter, it is necessary to have a detailed understanding of its technical parameters and scope of use to ensure that it can meet the actual working requirements. When selecting a liquid level transmitter, special attention should be paid to its measurement range, accuracy, environmental te...