7i96 (RS 485)

Sir,
I want to connect VFD (485+, 485-)  direct connections into 7i96 (TB2 connector TX+,TX-) for spindle speed is it possible.
If possible please tell how to configure this in linuxcnc.
Thanks,

Rohit Gupta 
 

Unfortunately that's not possible currently.

Sir,I am attaching a  connection picture of 7i96 to pwm converter to VFD please see this and tells any common GND required for the safety of these all equipments.If required how to common GND between these. Thanks, Rohit Gupta 

Where is problem?
is the problem, that VFD is half duplex and the mesa is full duplex?

Is the problem joint mb2hal with hostmot2 Uart?

The problem is that there's no driver support for Modbus --> Mesa PktUART
currently. The PKtUART can do 1/2 duplex with automatic line direction
handling so it not a hardware issue.

Thanks for your reply,
sir,
At present I am talking about the PWM wiring connection between these four (power supply, mesa 7i96, pwm converter, VFD) so I am asking how to interconnect 0v between all these four for 7i96 and VFD safety. 

Please reply me.

Thanks