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Showing posts from October 3, 2024

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【Q&A Guide】Common Configuration Problems & Solutions for SIMATIC S7-1200 PLCs!

Posted by Masterofplc on October 03, 2024

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This program is only a slight modification of the official sample program. In the original official sample, multiple modes of reading and writing are demonstrated (CSV files can be considered to be used when more data is required than TXT files, such as recording a small database collection). However, the writing is quite confusing, and there is even no HMI interface. Readers need to learn how to quickly find the input and output in the program, such as TextModeWrite (writing CSV files in text mode). At least they need to locate the variables of the triggered BOOL variable, the file address and folder to be written, and the data to be written (where the data to be written is an array of string type, separated by commas). You can directly open the official program and run it. You can also directly set and reset bWrite in the variable table at the top to test the program's operation. However, it is not conducive to analysis. After two months, you may forget how to make this thing run

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Retain values in S7 1200 when power off

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Common analog modules (there are also higher-end and lower-end ones, with the same usage method) EL3054 and EL4024 (4-channel analog input and output modules) Common digital modules (there are also higher-end and lower-end ones, with the same usage method) EL1809 and EL2809 (16-channel digital input and output modules One advantage of Beckhoff modules is their modular structure (you can choose how many digital inputs and outputs, analog inputs and outputs you want, or you can choose none. So it's very convenient to expand IO, just add one more piece, and one piece can be divided into 2, 4, 8, 16 points). Right-click the IO-Devices of the project, and then scan (if Scan is not available, please switch TwinCAT to Config mode first), and then scan out all the digital and analog input and output You can first complete the simple digital input and output, and define an array of bool type. Note that the AT%I and AT%Q are added, which are respectively linked to the scanned digital inpu

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