Parker HPD16N - Page 99

Parker Hannifin S.p.A. - S.B.C. Division HPD N User’s Manual
96
The HPD’s LED display
shows decimal points on
all characters
Check the keypad connection and make sure it was installed
correctly.
The drive goes in I
2
T mode due to an overload (it required
more current that was available).
Check:
- The cables between motor and HPD (there should be
no inverted phases). Take special care with motors with
terminals rather than the connector: it’s easy to make a
mistake. Adhere strictly to the wiring diagrams.
Mechanical measurements
Motor runaway occurs
when the drive is
enabled.
The most likely cause of this is an incorrect connection
between the encoder output of the drive (X7) and the
encoder input on the axis control.
Another possibility is an incorrect connection between the
terminals of the analogue output of the axes (DRV1 and Gnd)
and the analogue reference input of the HPD (X2-terminals 1
and 2 with shielding on terminal 3).
Check the wiring of both the analogue reference signal
cable and the reaction signal cable (encoder). If correct,
invert the analogue input on the HPD (X2, terminals 1 and
2).
See below if the motor now rotates in the wrong direction.
The motor turns slowly
when the drive is
enabled.
The drive isn’t under the control of the axis controller.
Check the cable connecting the encoder output (X7) and the
axis controller.
Check the analogue reference cable connecting the drive (X2 –
terminals 1, 2, and 3) and the axis controller.
Make sure the analogue output of the axis controller is putting
out a current.
The motor doesn’t move
and has no torque.
Make sure the display shows RUN when the drive is enabled.
If not, check the connection between X3-terminals 11 and
19. Recheck the programming of the HPD and the wiring.
Check the I/O signals for the axis controller.
The motor turns in the
wrong direction
Invert the encoder signals A & /A and the analogue reference
inputs on the HPD (X2 – terminals 1 and 2).