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2-110 Input Power Conditioning

Input Power

Conditioning

Refer to Chapter 2 of “Wiring and Grounding Guidelines for PWM AC

Drives,” publication DRIVES-IN001A-EN-P.

Jog Also refer to Jog on page 2-67.

When a JOG command is issued by any of the controlling devices (terminal

block digital input, communications adapter or HIM), the drive ouputs

voltage and frequency to the motor as long as the command is present.

When the command is released, the drive output stops.

Whenever a jog command is present, the value programmed in parameter

100, [Jog Speed] becomes the active speed reference. Regardless of the

[Speed Mode] or [Feedback Select] setting, no modifications (i.e. no PI

adder, no slip adder, no trim adder, etc.) will be made to the reference.

For PowerFlex 70 and PowerFlex 700 with Standard Control, the jog

reference will always be a positive number limited between Minimum

Speed and Maximum Speed.

If [Direction Mode] = “Unipolar” the drive will jog using the Jog reference

parameter value and will use the direction currently selected via the DPI

commanded direction. When [Direction Mode] = “Bipolar” and a Jog

command (with no direction) is asserted, the drive will jog using the Jog

reference parameter (which is always positive or forward). To accommodate

jogging with direction while in Bipolar mode (such as from a terminal

block), the drive will allow Jog Fwd and Jog Rev to be configured as

terminal block inputs. When these inputs are asserted, the drive will jog the

requested direction. This still implies that a HIM can only jog in the forward

direction when in Bipolar mode since they only transmit a Jog command

with no direction via DPI.

For PowerFlex 700 drives with Vector Control, 2 independent Jog Speeds

(1 and 2) are provided. The jog reference is signed and limited between

Minimum Speed or Reverse Speed Limit (whichever is programmed)) and

Maximum Speed. In this control, the jog reference controls both speed and

direction of the jog operation. If the programmed Jog Speed is negative the

drive will jog in the reverse direction: if the Jog Speed value is positive, the

drive will jog in the forward direction.

When a jog command is issued, exclusive control of speed and direction is

given to the Jog function. If the master speed reference is bipolar and

commanding reverse direction but the programmed Jog Speed is a positive

value, the drive will jog in the forward direction, overriding the direction

control of a bipolar speed reference.

Allen-Bradley PowerFlex 70 Reference Manual

Other manuals for Allen-Bradley PowerFlex 70