DMC-1400 Series Command Reference AC ● 15
AC FUNCTION: Acceleration
DESCRIPTION:
The Acceleration (AC) command sets the linear acceleration rate for independent moves, such
as PR, PA and JG moves. The parameters input will be rounded down to the nearest
factor of 1024. The units of the parameters are counts per second squared. The
acceleration rate may be changed during motion. The DC command is used to specify
the deceleration rate.
ARGUMENTS: AC n where
n is an unsigned number in the range in the range 1024 to 67107840
“?” returns the acceleration value
USAGE:
While Moving Yes Default Value 256000
In a Program Yes Default Format 8.0
Command Line Yes
Can be Interrogated Yes
Used as an Operand Yes
Controller Usage ALL
OPERAND USAGE:
_ACx contains the value of acceleration.
RELATED COMMANDS:
DC Specifies deceleration rate.
FA Feedforward Acceleration.
IT Smoothing constant
EXAMPLES:
AC 150000 Set acceleration to 150000
AC ? Request the current Acceleration setting
0149504 Return Acceleration
(resolution, 1024)
V=_AC Assigns the current acceleration setting to the variable V
HINTS: Specify realistic acceleration rates based on your physical system such as motor torque
rating, loads, and amplifier current rating. Specifying an excessive acceleration will cause large
following error during acceleration and the motor will not follow the commanded profile. The
acceleration feedforward command FA will help minimize the error.