The good news (if I actually have the correct Mitsubishi manual) is that the analog input can be configured to 16bit.
Unfortunately, the setting for 16 bit resolution only applies to the analog speed command. I’m not sure what the resolution for the analog torque command is. The resolution for the analog torque limit is 10 bits, so maybe that also applies to the analog torque command.
There is also the 4-20mA analog option which is current-driven and less sensitive to noise … as long as good wiring practice is followed, noise shouldn't be an issue.
That’s good to know! The load cell amplifier has an option for 4 - 20 mA output, as do the AI boards I am considering buying. So, I wouldn’t need to add a resistor in parallel to convert the signal back to voltage.
The description for the load cell says “29 Awg 4 Conductor Spiral Shielded Silicone Cable,” which includes a floating shield. So, that part (+/- Excitation, +/- Signal) shouldn’t be susceptible to noise, correct? As for the current output signal from the load cell amplifier, is it enough to use a shielded (or double-shielded) stranded wire?
If I’m understanding this correctly, the load cell amplifier connects to an AI of the PLC. The analog torque command makes a connection between the servo drive and an AO of the PLC. The most resolution I can get out of an AI is 12 bit + sign or 15 bit + sign. For the AO, the most resolution I can get is 12 bit or 14 bit. Is choosing the higher-bit option always better?
Further, how would I go about scaling down the +/- 10 V from the AO to the required +/- 8 V for the analog torque command? Is this something I do within the PLC programming?
Thanks again for taking the time to help me.