Rockwell Automation 150-E SMC Elevator Users Manual - Manual (Page 7)

Rockwell Automation Publication 150-UM009D-EN-P - February 2011 7
Introduction Chapter 1
Function Overview The Bulletin 150-E elevator panel provides solution to both advanced motor
control and simple diagnostics. The following information provides a brief
overview of the basic product features.
Motor Control
Diagnostics
Current Limit Through the use of internal current sensors, the SMC™ will regulate the current
level applied to the motor over the programmed period of time. This type of motor
control produces a slow start and insures that the current does not exceed the
programmed level. This is the standard configuration of the device and aligns well
with traditional applications.
Soft Start The voltage is ramped from an initial set point to full voltage over the programmed
period of time. This type of motor control produces a smooth start in less time
than the current limit setting. However, the current is not restricted.
Soft Stop The voltage is ramped down from full voltage and applied to the motor over a
programmed period of time. The result is a smooth stop.
Overload Provides protection of the motor for over current conditions. This feature offers a
user-selectable setting called the trip class, which can be used to accommodate
different applications and motor types. When the motor draws more than the
nominal value of current for a period of time, the device will fault on a motor
overload fault.
Over-
Temperature A built-in self-monitoring method for detecting a SCR over-temperature condition. If
the internal temperature exceeds a design threshold, the device will fault on a SCR
Overtemp fault.
Phase
Reversal The user can select the phase relationship of the incoming power. If this phase
relationship changes, the device will fault indicating a problem.
Phase Loss/
Open Load When any one of the incoming 3 phases are lost, the controller will fault indicating
a phase loss condition has occurred.
Phase
Imbalance When enabled, will detect if a phase imbalance condition exists and fault the unit.
A phase imbalance is defined as a 65% differential between the highest and
lowest phase for more than 3 seconds.
Shorted SCR Each time the SMC initiates a start, it checks to see if the SCRs are operating
correctly. If the controller is unable to properly turn on and off any one of the SCRs,
the device will fault on a Shorted SCR fault.