Rockwell Automation LC-Series Linear Motor - Manual (Page 31)

1 Item Number 814036 - Rev C
Chapter
3
Troubleshooting
Hall Effect/Thermal Signal
Module Troubleshooting
and Replacing Troubleshooting the module:
1. Thermal Sensor - Refer to thermal sensor signal specification on Table
2.R for resistance - temperature values.
2. Hall Effect Circuit - Hall Signals
a. With drive power OFF, verify Hall circuit is connected to the drive
per interface wiring specifications.
b. Disconnect motor leads from drive.
c. Turn Hall power supply ON (driver power ON).
d. Refering to Figure 2.15 Motor Phasing Diagram. Using an
oscilloscope, check waveforms at S1, S2 and S3 while slowly and
steadily moving the motor by hand in the specified phasing direction.
e. Check for proper logic levels (approximately 0V = low, +V= high)
and sequence: S1 leads S2 leads S3 with approximately 120 electrical
degree spacing in between.
ATTENTION
!
Even with motor power disabled and leads disconnected,
permanent magnet motors can generate high Back EMF
voltage when moving due to external forces.
TIP
Connect Probe common to Hall Signal Common.