Parker Hannifin S.p.A.  - S.B.C. Division                                               HPD N User’s Manual 
 
91
8. Appendix C: DC bus voltage thresholds 
 
870 
805 
780 
120 
56 
40 
OVER VOLTAGE 
Brake - high treshold 
Brake - low treshold 
in-rush control excluded 
in-rush control included 
UNDER VOLTAGE 
0 
1024 
normal 
operation 
area 
 
 
 
The modification of the above thresholds makes 
potentially dangerous to wire together the DC BUSes of 
HPD”N” drives with HPD drives. 
 
9. Appendix D: Standard settings 
 
Reference   Positive 
Shaft moving  (motor shaft view): 
 
Torque monitor  Positive 
R/D Counter  UP 
Encoder out         A 
         B 
tacho signal  positive 
Iu