Rockwell Automation GMLC Reference Manual - Manual (Page 281)

Publication GMLC-5.2 - November 1999
244 Motion Blocks
Changing Jog Dynamics
Selecting Jog in the For current field, lets you change the speed,
acceleration, and/or deceleration of a jog in progress to the specified
value. The speed change occurs at the specified acceleration rate (if the
new speed is higher than the current speed), or at the specified
deceleration rate (if the new speed is lower than the current speed).
Important: The Change Dynamics block affects only trapezoidal profile
jogs. Other velocity profiles cannot be changed on the fly,
except to zero speed.
.You can change trapezoidal profile jogs to any speed at any time.
However, you can change parabolic and s-curve profile jogs only to zero
speed, and then only if the axis is not decelerating (Decel_status = 0).
Unlike a move, changing the speed of a jog to zero terminates the jog and
Jog_status = 0 (Not Jogging).
Analog Offset
The Analog Offset block lets the motion controller use an analog input to
generate a scaled position offset and add that offset to the command
position of the selected servo axis. By offsetting the controller’s servo
loop in response to the analog input signal, the servo loop can directly
regulate pressure, force, tension, and more. To use analog inputs, you
need to connect an analog sensor or transducer using a Flex I/O analog
input module (p/n 1794-IE8 or 1794-IE4XOE2) to the controller.
The Analog Offset block resides on the Advanced Motion Palette.
!
ATTENTION: For maximum safety, be sure to set soft and
hard limits before executing the Analog Offset block.