Mesa 7i96 + 7i85s PWM VFD Control

Hello,
I just came back from a business trip yesterday and I made a little wiring scetch to show how everything is wired. 

I only seem to get 5v to the pwm output. I can´t think of any error.
 

PWM-  should go to GND (7I85S TB1 pin 10)
PWM+ should go to 7I85S pin 11

Okay I will try that tomorrow. Thank you in advance

Good Day, Sir!

I just gave your tip a try and It didn´t work. 

Spindle starts but I can not alter the RPM. It still runs on max rpm. On the pwm port there are still 4.95V.

Is there a way I can program somwhere  else a pwm port on the 7i96 or so?
I don´t realy need quick response pwm thing since I don´t index the spindle or something like that.

Greetings and thank you.

Is 7I85S TB1 pin 11 low (close to 0V) before LinucCNC is running?
(relative to ground = TB1 pin 10, TB1 pin 12 should not be connected to anything)

Hello Mister PCW,

I´m sorry that it took me so long but my wife was in the hospital for a few weeks and I could not get to it.

7i85S TB1 Pin 11 is 0 volt when I measure it to TB1 Pin 10 when Linuxcnc is not running.
If I start Linuxcnc it jumps up to 4,90 volts without doing anything but starting Linuxcnc.

When I invert the PWM output with the code line in my hal that you gave me scenario is as follows:
TB1 Pin 11 0 Volts when Linuxcnc is not running.
When I start Linuxcnc and enable the machine it stays at 0 Volts. 
When I run an MDI Command like M3 S3000 or any other value, TB1 Pin11 stays at 0 volts.