Learn about PLC Using the PLC’s digital output to control the inverter (i.e., connecting the PLC’s digital output directly to the inverter’s digital input, allowing the PLC to control the inverter’s start, stop, forward, reverse, and multi-speed operation at high, medium, and low speeds through programming). Using the PLC’s analog signal to control the inverter. … Read more
Emmm… If you are a pure tech enthusiast wanting to continuously improve your skills want to learn more about IoT knowledge then we will introduce you to the following valuable information Principles and Application Scenarios of General Data Collectors The Differences and Connections between RS-485 and Modbus Understand in One Minute General Data Collector Application … Read more
Tip:Click above“Ba Fang Hui PLC Practical Programming Training“↑Follow us for free RS485is a wired transmission, which requires a hardware transmission medium, essentially just two wires are sufficient. The actual signal transmitted over these two wires is the same signal; the sending end splits this signal into two, but at the receiving end, it is restored … Read more
How to Design a Modular Host Computer? Why is there such a big difference in the situation of engineers at home and abroad? Easy Learning of TIA Portal SCL Programming Structured Variables Understand S7-1500 PLC Reading and Writing SQL Microsoft Database in Seconds 1. Device Functionality Among various schemes for medium to long distance communication … Read more
BFH Click the blue text to follow us↑↑↑↑ RS-485 is a wired transmission, so it requires a hardware transmission medium, which is essentially just two wires. The actual signal transmitted on these two wires is the same; the sender splits this signal into two, but at the receiving end, it is restored to its original … Read more
Past and Present RS-485, what does RS mean? It is an abbreviation for Recommended Standard, which means a recommended standard. 485 is the standard identification number, and there is no need to delve into why this identification number is set. RS-485 is also known as ANSI/TIA/EIA-485, these prefixes are abbreviations of standard associations’ names, for … Read more
1. Hardware Setup The Modbus communication in the program is conducted between the 0 communication ports of two S7-200 CPUs (it is best for each CPU to have two communication ports). On the master side, communication can also be established using the corresponding library files “MBUS_CTRL_P1” and “MBUS_MSG_P1” through the 1st communication port. Communication port … Read more
Search on WeChat Technical Training In 1979, Schneider Electric established a bus protocol for industrial sites called the Modbus protocol. Nowadays, many industrial applications using RS485 communication adopt the Modbus protocol. Today, we will explore RS485 communication and the Modbus communication protocol. 1. Introduction In fields such as industrial control, power communication, and smart instruments, … Read more
Source | Guoguo Little Master Modbus is considered a classic communication protocol in the embedded field. Whether you are a beginner or an engineer with years of experience, it is essential to understand it. 1. What is Modbus? As the name suggests, it is a bus protocol. For example, serial protocols, IIC protocols, and SPI … Read more
Here we continue to share knowledge about MODBUS communication between the HMI and the variable frequency drive (VFD).Previously, we discussed the two steps required to achieve communication between the HMI and the VFD: (1) Selection of communication driver in the HMI (2) Establishment of variables in the HMI Today, we will continue to share some … Read more