Rockwell Automation 150 USE MN/SMC DIALOG + CONTROLLER - Manual (Page 150)

Chapter
10
Troubleshooting
Introduction For safety of maintenance personnel as well as others who might be
exposed to electrical hazards associated with maintenance activities,
follow the local safety related work practices (for example, the NFPA
70E, Part II in the United States). Maintenance personnel must be
trained in the safety practices, procedures, and requirements that
pertain to their respective job assignments.
Note: The time it takes for the motor to come up to speed may be
more or less than the time programmed, depending on the
frictional and inertial characteristics of the connected load.
Note: Depending on the application, the SMB Smart Motor
Braking, Accu-Stop, and Slow Speed with Braking options
may cause some vibration or noise during the stopping cycle.
This may be minimized by lowering the braking current
adjustment. If this is a concern in your application, please
consult the factory before implementing these options.
!
ATTENTION: Hazardous voltage is present in the
motor circuit even when the SMC Dialog Plus controller
is off. To avoid shock hazard, disconnect main power
before working on the controller, motor, or control
devices such as Start-Stop push buttons. Procedures
that require parts of the equipment to be energized
during troubleshooting, testing, etc., must be performed
by properly qualified personnel, using appropriate local
safety work practices and precautionary measures.
!
ATTENTION: Disconnect the controller from the
motor before measuring insulation resistance (IR) of the
motor windings. Voltages used for insulation resistance
testing can cause SCR failure. Do not make any
measurements on the controller with an IR tester
(megger).