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DATA READING FROM PLC
#1
Hello

I need to read / write data from a DB in a SIEMENS S7 1200 PLC, I would like to use modbus TCP, some of you have already done a similar thing.
Is there already an example of json for mapping?

Thanks so much
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#2
Try this simple tool to create it yourself
https://forum.logicmachine.net/showthrea...8#pid19678
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#3
(26.04.2021, 13:59)Daniel. Wrote: Try this simple tool to create it yourself
https://forum.logicmachine.net/showthrea...8#pid19678

Ok

I have already used the fileexcel and it is very useful my problem is to understand how the registers are addressed.
EXAMPLE
I have a DB in the PLC which contains the values and which I pass to the modbus TCP server
in the db I have the first real value PLC address 0.0 which register corresponds to 1? datatype I guess 9 is a holding register, writable.

Thanks so much
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#4
I don't know this product, you probably should ask Siemens for help but it worth to try our TCP/RTU read test.
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