Rockwell Automation Publication 20C-PM001F-EN-P - March 2012 101
Application Notes Appendix B
Start At Power Up
A powerup delay time of up to 30 seconds can be programmed through [Powerup
Delay], parameter 167. After the time expires, the drive will start if all of the start
permissive conditions are met. Before that time, restart is not possible.
Stop Modes
[Powerup Delay]
Time Expired?
Start At PowerUp
Ye s
Powerup Terminated!
Normal Mode
No
No
No
Powerup Start
Is the terminal block Run,
Run Forward or Run Reverse
Input Closed?
Ye s
Ye s
All Start Permissives Met?
1. No fault conditions present.
2. No Type 2 alarm conditions present.
3. The terminal block programmed
enable input is closed.
4. The Stop input (from all sources) is
received.
Mode Description
Coast
This method releases the motor and allows the load to stop by friction.
1. On Stop, the drive output goes immediately to zero (off).
2. No further power is supplied to the motor. The drive has released control.
3. The motor will coast for a time that is dependent on the mechanics of the system (inertia, friction, etc).
Important: When a “Coast” stop is performed, the drive requires that the motor flux be completely
dissipated before a re-start command will take affect. The amount of time it takes for the motor flux to
dissipate depends upon the size of the drive and motor. If a Start command is issued before the motor flux
has completely dissipated, the HIM will continue to display “Stopped” and the drive will start the motor
after the motor flux has completely dissipated.
Coast Time is load dependent
Stop
Command
Time
Output Voltage
Output Current
Motor Speed
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