Communication Requirements and Functions: The firmware version of V90 is V1.05 and above; V90 communicates through the RS485 interface at the top of the drive’s front panel (no additional hardware required); Pin assignment of RS485; (Pin 3 and Pin 8) Parameters can be modified, such as speed/position/torque set values via ModBus; Parameters can be monitored, … Read more
Modbus Communication Protocol History Initially, factories controlled systems through what was known as large microprocessor systems in “Distributed Control Systems” or “DCS”. A central control system managed the entire setup (in the control room). All sensors and actuators were connected to the control system via point-to-point wiring. Alternatively, they could be added in a network … Read more
Hello everyone, good evening! Beginner’s Guide to TIA Portal: MODBUS-RTU Communication Configuration Continuing from the previous article, we will explain how to use MODBUS communication commands. MODBUS communication requires three commands: ① MB_COMM_LOAD command ② MB_MASTER command (Master command) ③ MB_SLAVE command (Slave command) The communication commands are located in Communication – Communication Processor – … Read more
Consider a DC power supply with an output socket interface that has three pins: positive, negative, and ground. Accordingly, the load’s plug should also have three pins corresponding to the power side to correctly obtain power supply. Note that there are three essential conditions that must be met: The first is that the shape, size, … Read more
Click Jicheng Training WeChat Follow me! ☀ Jicheng Training Network’s official WeChat is the most professional and concentrated in the industrial control field, providing technical sharing, free videos, and a communication platform. Follow Jicheng, and there will be no problem in improving your skills! 1. Overview All the content that needs to be discussed regarding … Read more
Imagine a DC power supply with an output socket interface that has three pins: positive, negative, and ground. Correspondingly, the load’s plug should also have three pins that correspond one-to-one with the power supply side to correctly obtain power supply. Note that there are three essential conditions that must be met: The first is that … Read more
Search on WeChat Technical Training In 1979, Schneider Electric established the Modbus protocol, a bus protocol used for industrial sites. Many industrial applications using RS485 communication adopt the Modbus protocol, so today we will explore RS485 communication and the Modbus communication protocol. 【1】/ Introduction In industrial control, power communication, and intelligent instruments, serial communication is … Read more
Search WeChat Technical Training Imagine a DC power supply with three pins on its output socket: positive, negative, and ground. Correspondingly, the load’s plug should also have three pins that correspond to the power supply, allowing it to receive the energy supply correctly. Note that there are three essential conditions: The first is that the … Read more
The TIA V13 SP1 software provides two versions of Modbus RTU commands: Figure 1. Two Versions of Modbus RTU Commands The earlier version of the Modbus RTU command (MODBUS (V2.2) in Figure 1) can only communicate via the CM1241 communication module or the CB1241 communication board. The new version of the Modbus RTU command (MODBUS(RTU) … Read more
RS485 and MODBUS communication are commonly used concepts in industrial control systems, but they are different. Below is a brief introduction. RS485 is a physical interface, simply put, it is hardware. MODBUS is an internationally standardized communication protocol used for device data exchange between different manufacturers (generally for industrial purposes); in industrial environments, data is … Read more