S7-1500 MODBUS Communication MODBUS MASTER: First configure the hardware, as shown below: Then open OB1, and program, as shown below: First call the initialized block MODBUS COMMONLOAD Pin description: REQ: The command starts on the rising edge (0 to 1). PORT: After installing and configuring the CM, you can find the CM port value in … Read more
Search on WeChat Technical Training 1 System Configuration Description (1) PLC:S7-1200. (2) Gateway:Modbus RTU to Profinet Gateway XJ-PN5001. (3) Weighing Instrument:XH3180-K. 2 Configuration and Debugging Steps (1) Open the software to create a new project “Weighing Instrument”. Go to Devices and Networks, select Manage General Station Description Files in the options, and install the GSD … 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
Recently, I used the S7-1200 to collect data from a certain flow sensor via Modbus-RTU. The Siemens side chose the CM1241 (RS422/485) (order number 6ES7 241-1CH32-0XB0, firmware version V2.2), and the CPU is 1214C with firmware version V4.2. I thought the debugging would be simple, but it took a lot of time, and I consulted … 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
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
Understanding the Modbus Protocol with PowerPoint Source: This article is reprinted from the internet, and the copyright belongs to the original author. If there are any copyright issues, please contact us to delete it promptly. Thank you! Scan to Follow WeChat ID｜13615417996 Follow the QR code on the left to get it for free [Siemens … Read more
Search on WeChat Technical Training 01 Siemens S7-200 SMART as Modbus Slave 1.Check the Micro/WIN SMART Modbus RTU Slave instruction library (Figure 1), which should include the MBUS_INIT and MBUS_SLAVE subprograms. 2.Use SM0.1 to call the MBUS_INIT subprogram for initialization, and use SM0.0 to call MBUS_SLAVE, specifying the corresponding parameters. Detailed explanations of the parameters … Read more