Mitsubishi VFD Modbus cant get it work

for what?


which vfd you have?

it is to try with my configuration, my VDF is an ALTIVAR 31, you can see it here in action:

at the moment, I am trying to integrate the "orient" component without much success so far

ok thats different to my process.

i use the vfd only for start stop, regulate the frequency and look if it at speed.

i use a abz encoder for indexing,speed OR position for offset turning.
i dont position the spindle BUT i can turn the spindle very slow and stop at a angle with a error of bout 5 degree..

my motor is a small 3 phase asynchron drive.

i use my emco compact 5 cnc for turning small parts.

my biggest problem is.. i need my vfd in modbus mode... not in mitsubishi protocol...

but i dont know how to read or write a holding register... i dont know how to calculate the registers... when i want to read register 40008 or 40009... whats the hex?! with 0x0007,0x0008,0x0009 i get nothing....

i must sniff to the modbus when mach3 is running to get a example of traffic...