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Rockwell Automation 1336E IMPACT Adjustable Frequency AC Drive User Manual V 1-4.XX User Manual

Page 344

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B-6

Control Block Diagrams

Choosing a Stop Command

You need to specify how you want the drive to stop the motor when a
stop command is issued. You have three options:

By default, the normal stop (bit 0) is used.

To view which type of stop is currently selected for your drive, check
to see which bit of Logic Input Sts is set (0, 7, or 8). If multiple bits
are set, the priority is bit 8 (coast stop), bit 7 (current limit stop), and
then bit 0 (normal stop).

This type

of stop:

Is specified in this

bit of Logic Input

Sts:

And can be represented by the following

diagram:

Coast

8

This results in inverter shut off.

Current

Limit

7

This results in the fastest possible stop.

Normal

(Ramp)

0

Speed

Time

Stop command issued

Speed

Time

Stop command issued

Speed

Time

Stop command issued

You determine

the length of time

The braking method, if any, that you have selected also affects how
your drive stops. Refer to Chapter 9, Applications, and the
description of Bus/Brake Opts (parameter 13) in Chapter 11,
Parameters, for information about the available br
aking methods.