Resolver cable balance tuning test, Performing the cable balance tuning test, Resolver cable balance tuning test on – Rockwell Automation 20P PowerFlex Digital DC Drive User Manual
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Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Appendix C
Application Notes
Resolver Cable Balance
Tuning Test
At drive power-up the resolver feedback module automatically performs some
tuning (cable length compensation, Par 426 [Resolver Status] bit 3
“CableCompSts” and cable resonance, Par 426 [Resolver Status], bit 10
“HardwareSts”) of the attached resolver and cable. The following optional cable
balance tuning test can be performed to possibly enhance the performance of the
resolver. The test takes approximately 10 seconds to successfully complete.
Performing the Cable Balance Tuning Test
1.
Remove and lock-out all incoming power to the drive.
2.
Verify that the resolver feedback module has been correctly installed and
wired in the drive according to the PowerFlex DC Drive Resolver
Feedback Module Installation Instructions, publication
3.
Apply power to the drive.
4.
Verify that Par 422 [Fdbk Option ID] displays the appropriate module ID
for the resolver feedback module board installed in the drive.
5.
Verify that the following parameters have been properly configured:
•
Parameter 423 [Reslvr Type Sel] (see page
)
•
Parameter 424 [Reslvr Spd Ratio] (see page
•
Parameter 425 [Resolver Config] (see page
6.
Set Par 414 [Fdbk Device Type] to 3 “Armature” (armature voltage
feedback).
7.
Run the drive at 50% of base speed (or at least 750 rpm when 10-bit
resolution selected. Note that higher resolutions and x2, x5 resolvers will
have lower minimum speeds).
8.
Verify that Par 426 [Resolver Status], bit 2 “ReslvrMinSpd” is not set.
9.
Set Par 431 [Reslvr CableBal] to 1 “On” (this parameter will automatically
be reset to zero).
The motor will rotate during this tuning procedure. Hazard of personal injury exists
due to motor shaft rotation and/or machinery motion.
ATTENTION: Remove power before making or breaking cable connections.
When you remove or insert a cable connector with power applied, an electrical
arc may occur. An electrical arc can cause personal injury or property damage
by:
• sending an erroneous signal to your system’s field devices, causing unintended
machine motion
• causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the module and its
mating connector. Worn contacts may create electrical resistance.