Input Power Conditioning; Jog - Allen-Bradley PowerFlex 70 Reference Manual

Input Power Conditioning

Input Power Conditioning

Jog

110
Refer to Chapter 2 of "Wiring and Grounding Guidelines for PWM AC Drives, "
publication DRIVES-IN001A-EN-P.
Also refer to Jog on page 75.
When a JOG command is issued by any of the controlling devices (terminal
block digital input, communications adapter or HIM), the drive outputs 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.
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013