7i97T analog out always -10V

I've finally got my 7i97T running and I am at the point to test driving the spindle of my Lathe. The Simodrive 611 LT Module expects +-10V for running the spindle cw or ccw at certain speeds.
im not sure about my wiring, since I always get -10V and the spindle only turns one direction at full speed.

On TB3 analog0 i have enable +- on the first two pins. Then 10v+- on the third and ground of my 24V Powersupply on the fourth pin.

I did similiar retrofitting before and every time i ran into this, problem is: I cant remeber the solution.

I read somewhere about "spindle mode" and dithtering etc. Where can I read that up and how would I know what to look for ?

For the 7I97/7I97T, you need to set offset mode true for all PWMgens:

setp hm2_7i97.0.pwmgen.00.offset-mode 1
setp hm2_7i97.0.pwmgen.01.offset-mode 1
setp hm2_7i97.0.pwmgen.02.offset-mode 1
etc
also dither should be enabled:

setp hm2_7i97.0.pwmgen.00.dither 1
setp hm2_7i97.0.pwmgen.01.dither1
setp hm2_7i97.0.pwmgen.02.dither 1
etc