Search the Community

I'm new to PLC, I don't know the technical terms either. I'm trying to develop app to read/write from/to Mitsubishi MELSEC iQ-F FX5. As I read here: https://dl.mitsubishielectric.co.jp/dl/fa/document/catalog/plcf/l08645/l08645-a.pdf that it is possible to write/read from PLC to/from a PC (with Ethernet connection). I'm programming in Nodejs, I don't know if such an application needs any server operation (main.js) or all coding - to do the read/writing operation - are handled in html function.  The FX5 user manual explains methods for the device that is communicating with CPU module by MC protocol (Is this one? https://github.com/plcpeople/mcprotocol) I don't know where to store data in PLC and from where to read in PLC. I need to send number sequence and timestamp to PLC and read 3 data (number sequence, timestamp, true/false) from PLC. This mc protocol states 9 variables (D0, M6990, CN199, R2000, X034, D6000.1, D6001.2, S4, RFLOAT5000). Which variables are good for storing such data? Do you recommend MC protocol?