PM or FS A/P actuates stab trim motors, how...?

Hello,
I am using the NG trim wheels just for running making any input with the trim switches locating on the control wheels.
So, if the PM/FS A/P makes any changes in pitch during autoflight the FS stab trim moves.
How can I make this trim motors run during any A/P input...
Nose up input = ...?
Nose dn input = ...?
I am not using any trim axis, just the bottons configured by FSUIPC.
I only need one relay input for nose down and one for nose up to make the DC motor run in the right direction as long as there is any change in trim during auto trim...
Thanks
Brian

Hello,
many thanks for help. Now I solved the problem using PM Offsets...
5528 2 (Boeing MCP Trim Movement Write)
To insert for phidgets card:
5528 .4 TrimValueDecrease
5528 .5 TrimValueStable
5528 .6 TrimValueincrease
Now it works together with the 16/16 phidgets card running PM-System directly.
I am using two relays switching the right movement direction.
Brian