When uploading a program from a Mitsubishi PLC to another PLC or computer, many places in the program display a yellow background (as shown in Figure 1). Changing to a higher version of Mitsubishi PLC programming software does not work. What is the reason for this? Generally, it is a problem of programming methods. The following is a simple analysis of the reasons.
1 picture
Reasons for incomplete upload of Mitsubishi PLC program
There are two programming methods:
1. One is to write a program on a computer. If there are serious errors in the overall structure of the program, it cannot be compiled and downloaded!
2. The other method is to use a handheld programmer such as FX-20P-E. If there is an error in the overall structure of the program, it cannot be written into the PLC!
The above two situations will result in failure to upload the program or incomplete program upload.
Solution to incomplete program upload of Mitsubishi PLC
1. When programming on a computer, the number of lines on the back of the contact cannot exceed 24, otherwise it will fail to compile and an error will be prompted.
2. When programming with a handheld programmer, you can exceed 24 lines without reporting an error. If a program written with a handheld programmer exceeds 24 lines, when it is read with a computer program, the part exceeding 24 lines will be lost, and this section will be marked with a yellow background, indicating that the program scope is too large.
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