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 1381 [TestPoint Sel]. Values can be viewed with
Par 1382
[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
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