In the upgrade and transformation of old equipment projects, it is inevitable to involve the replacement and upgrade of PLCs. However, sometimes the original PLC program of the control system is lost, and a complete annotated original program cannot be found; at other times, the original program may contain proprietary technology blocks; or sometimes the … Read more
Click the “Technical Training” above and select “Pin to Top” Over 110,000 industrial control professionals follow this WeChat platform: technical sharing, learning exchange, and industrial control videos Recently, a student asked how to modify the timer settings in the S7-300 PLC. The data type for the timer setting value is in S5TIME format, but when … Read more
50 Classic Q&A About Siemens S7-300 PLC 1: How to Avoid “Communication Error” Message When Using CPU 315F and ET 200S? When using CPU S7 315F, ET 200S, and safety-related DI/DO modules, you will call the safety program in OB35. Moreover, you have accepted all the default monitoring time values and are willing to receive … Read more
Wireless Remote Control and Adjustment Network Using S7-300 PLC When the distance between multiple control points is very far, and they are remote and scattered, such as water source wells, valves, and water level monitoring in urban water supply and hydraulic departments, these devices are spread over dozens or even hundreds of square kilometers. To … Read more
(Thanks to everyone for your likes and appreciation. If this article resonates with you, please “like” and “recommend” it, thank you all!) Task Introduction In the production processes of enterprises, various intelligent production devices operate under the unified control and management of automated intelligent control units, forming an industrial-grade network working mode characterized by interconnection … Read more
Supported baud rate range: 9600—-12M Order number: 6ES7-277-0AA22-0XA0 1. First, install the GSD file for EM277 (GSD file download link: http://www.con-star.com/download/download11.html) 2. In the path PROFIBUS DP—Additional Field Devices—PLC—SIMATIC—EM277, drag it into the DP line configuration 3. Click on “EM277 profibus dp” to see various types of communication data classifications, such as “2 BYTE OUT/ … Read more
Communication Between S7-300/400 and SINAMICS S120 via DP Bus 1. Overview of DP Bus Communication Functionality S7-300/400 can communicate with SINAMICS S120 via DP bus for both periodic and non-periodic data communication. Using standard S7 function blocks SFC14/SFC15, the S7-300/400 PLC can send Control Word 1 (CTW1) and Main Set Value (NSETP_B) to the drive … Read more
In a previous project, I was involved in the communication between the Yaskawa inverter and the S7-300. However, the available materials at night were all about control words and status words to control the inverter’s start and stop, as well as read some basic parameters. What I needed was to modify the inverter’s parameter values … Read more
Profibus-DP Communication Between S7-200 and S7-300 PROFIBUS Fieldbus 1. Profibus-DP Communication Between S7-200 and S7-300 PLCs 1. Analysis: The S7-200 PLC does not support the DP communication protocol and does not have a Profibus-DP interface, so it cannot be directly connected as a slave. However, it can be connected to the Profibus-DP network by adding … Read more
Click↑↑Technical Training, follow and pin to subscribe for free for a long time 180,000+ industrial control professionals are following the WeChat platform: technical sharing, learning exchange, industrial control videos This article introduces how to achieve communication between Modbus and Profibus-DP protocol devices, the application of the Modbus to Profibus-DP gateway PM-160, and the communication methods … Read more