PowerFlex Digital DC Drive User Manual -
Publication 20P-UM001C-EN-P - July 2008
4-14
Troubleshooting
The motor reaches maximum speed immediately.
Testpoint Codes and
Functions
Select a testpoint with Par
[TestPoint Sel]. Values can be viewed with
[TestPoint Data].
Control Board Testpoints:
Drive Symptom
Action
The motor accelerates to maximum speed and
cannot be controlled.
Check the analog input voltage and speed
reference values:
•
Parameters 1404 [Analog In1 Value], 1405
[Analog In2 Value], 44 [Speed Ref A] and 48
[Speed Ref B]
•
Check the setting of switch S9 and parameter
71 [Anlg In1 Config], S10 and 76 [Anlg In2
Config] or S11 and 81 [Anlg In3 Config].
The feedback device, encoder or DC analog
tachometer is not connected, incorrectly
connected or has failed.
•
Change parameter 414 [Fdbk Device Type] to 3
“Armature” to test the encoder or DC analog
tachometer feedback.
No.
(1)
(1)
Enter in [TestPoint Sel].
Description
Values
Minimum
Maximum
Default
566
Rx count
0
65535
0
567
Tx count
568
BusLoss count
569
Port 1 Timeout
570
Port 2 Timeout
571
Port 3 Timeout
572
Port 4 Timeout
573
Port 5 Timeout
574
Port 6 Timeout
Test Point Function
Test Point
Function
XY20
Monitors (± 10VDC) the [Anlg Outx Sel] parameter
values (using this test point, set all of the [Anlg Outx
Sel] parameters to the variable that must be
measured)
XY17
Output current signal
(0.61 V = nominal
drive output current)
XY10
Reference point
XY18
Reference point