Click on the above “Jicheng Training“, select “Pin to Top Public Account” 120,000+ industrial control professionals follow this WeChat platform: Technical sharing, learning exchange, industrial control videos Today, I will share some knowledge about MODBUS communication, using a touch screen to monitor inverters or instruments directly without going through a PLC: here we will take … Read more
1 A weighing instrument that supports the Modbus protocol A weighing instrument that supports the Modbus protocol 2 Set the communication parameters of the instrument You can adjust according to your requirements, as long as it matches with the PLC side Baud rate: 9600 Data format: 8n1: 8 data bits/no parity bit Communication method: Modbus … Read more
10.25-29 Chongqing Suzhou No Tin Siemens S7-1200/1500 PLC TIA Technology Practical Class Enrollment Open Modbus RTU Communication Discussion on Modbus RTU Communication In modern highly integrated industries, communication between PLCs is frequently used. Common communication protocols include Modbus, Profibus DP, Profinet, CANOPEN, etc. Today, we will explain how two PLCs communicate using Modbus RTU on … Read more
MODBUS is a very common communication method, widely used in frequency converters, servos, instruments, and PLCs due to its free nature. Typically, PLCs act as the master station to read data from slave stations. However, the differences among various PLCs can make MODBUS programming quite complex, which can be confusing for beginners. Japanese PLCs usually … Read more
WeChat Search Technical Training 01 Hardware Setup The Modbus communication in the program is conducted between the 0 communication ports of two S7-200 CPUs (it is best if each CPU has 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 communication port 1. … Read more
9 Online Siemens TIA Portal PLC Training Camp Registration Open on August 7 Siemens PLC Practical Training Class in Qingdao on August 18 1. Overview of MODBUS Communication The MODBUS protocol is divided into two types: MODBUS protocol over serial links and MODBUS protocol based on TCP/IP. The serial link MODBUS protocol includes MODBUS ASCII … 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
Search on WeChat Technical Training Modbus TCP is a very traditional and widely used communication protocol, and many smart devices support this protocol. Siemens S7-200SMART and the 1200 and 1500 series support it for free (300 and 400 series incur high fees), and it has been made into a standard library, making it very convenient … Read more
Click the blue text above to follow us for more content Control Requirements: Use MODBUS TCP communication for data exchange between two PLCs 1. Read data from the server addresses 40001~40005 and store it in VW200~VW208; 2. Write data from VW210~VW218 into the server’s 40006~40010; 3. Write data from VB220 into 00001~00008. 1. Open 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