AMCI SD4840EK, User Manual

Page: 26 / 104

M
OVE
P
ROFILES
SD4840EK User Manual
ADVANCED MICRO CONTROLS INC.
26
Basic Move Types (continued)
CW/CCW Jog Move
Jog Moves move in the programmed direction as long as the command is active. Two commands are avail-
able, the CW Jog Move will cause clockwise motion when the motor is wired as shown in this manual, while
the CCW Jog Move will cause counter-clockwise motion. These commands are often used to give the opera-
tor manual control over the axis.
Jog Moves are typically used to drive the machine under direct operator control, but they can also be used
when you are interested in controlling the speed of the shaft instead of its position. One such application is
driving a conveyor belt. To accommodate these applications, the running speed, acceleration, and decelera-
tion of the Jog Move can be changed
while the move is in progress
.
The CW Limit and CCW Limit inputs behave differently for CW/CCW Jog Moves and CW/CCW Registra-
tion Moves than all other move types. Like all moves, activating a limit will bring the move to an Immediate
Stop. Unlike other moves, a Jog or Registration move can be started when an end limit switch is active pro-
vided that the commanded direction is opposite that of the activated switch. For example, a CW Jog Move can
be issued while the CCW limit switch is active. This allows you to move off of an activated end limit switch.
As shown below, a Jog Move begins at the programmed Starting Speed, accelerates at the programmed rate to
the Programmed Speed and continues until a stop condition occurs. If it is a
Controlled Stop Condition
, the
SD4840EK will decelerate the motor to the starting speed and stop without losing position. If it is an
Immedi-
ate Stop Condition
, the motion stops immediately and the position becomes invalid.
It is possible to change the speed of a Jog Move without stopping the motion. The Programmed Speed, Accel-
eration, and Deceleration parameters can be changed during a Jog Move. When the Programmed Speed is
changed, the motor will accelerate or decelerate to the new Programmed Speed using the new accelerate/
decelerate parameter values. If you write a Programmed Speed to the SD4840EK that is less than the config-
ured Starting Speed, the Jog Move will continue at the present speed and the
Invalid_Jog_Change
status bit
will be set to “1”.
Figure R2.8 Jog Move
Controlled Stops

The Jog Move Command bit is reset to “0”.

An inactive-to-active transition on an input configured as a
Stop Jog or Registration Move
Input.

You toggle the Hold Move control bit in the Network Output Data. The use of the Hold Move and
Resume Move bits is explained in the
Controlling Moves In Progress
section starting on page 35.
SP
E
ED
POSITION
Change in
Parameters
Change in
Parameters
Controlled
Stop Condition