Omron

Programing noob here. I have a CJ2M CPU31 and i need to read and scale the signals from and arduino in either serial or BCD. (Since PWM proved quite impossible for me)

I was wondering if anyone could help me out with that, and how do I program a scale that can receive the signals and turn it into a 0-100% scale.

https://assets.omron.eu/downloads/manual/en/w474_cs_cj_nsj_series_instruction_reference_manual_en.pdf

Once the data is in the PLC, you can use the scaling instruction. Please refer to the manual above.

Connections to PLC:
https://electronics.stackexchange.com/questions/211312/connect-arduino-to-omron-plc

Serial Connection to PLC:
http://forum.arduino.cc/index.php?topic=147526.0

Hope this helps you out.
Regards,

yep PWM, is not the way to do this, as the PLC is way too slow for thsi to get it good.
yes you can use a serial connection, (with an UNO you will need a extra serial pinning like softwareserial. on a MEGA there are 3 serial, is easier to do and still pretty cheap.
you can also use the ethernet to communicate.
a simple way to do this is to use a slow I2C connection, please take care of the 24 Volt to 5 Volt.