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Read/Write data to PLC

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a question... I builded a simple monitor of plc. I need to read the data of the Mitsubishi FX3GE PLC. In example I should read:
D14  FLOAT 32bit
D16  FLOAT 32bit
alarms from M100 to M119
and a bit of state M450

How can I do this? The PLC is connected via ethernet and the port il 5002. 
I'm working with PHP and normally use modbus, opc-ua, etc. But here?

Thanks in advance


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