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Moog Animatics SmartMotor™ Developer's Guide, Rev. L
Page 250 of 909
AC
Acceleration Commanded
APPLICATION:
Motion control
DESCRIPTION:
Get (reads) the commanded acceleration
EXECUTION:
Immediate
CONDITIONAL TO:
N/A
LIMITATIONS:
N/A
READ/REPORT:
RAC
WRITE:
Read only
LANGUAGE ACCESS:
Formulas and conditional testing
UNITS:
(encoder counts / (sample²) ) * 65536
RANGE OF VALUES:
-2147483648 to 2147483647
TYPICAL VALUES:
-1000 to 1000
DEFAULT VALUE:
0
FIRMWARE VERSION:
5.x and later
COMBITRONIC:
RAC:3, x=AC:3
where ":3" is the motor address — use the actual address or a
variable
DETAILED DESCRIPTION:
The AC command gets (reads) the commanded acceleration:
l
=AC
Reads the real-time commanded acceleration from trajectory generator 1 (MV or MP
modes only)
When a velocity or position profile move is commanded, the velocity is ramped up and down
according to the settings of ADT=, AT=, or DT=. At any instant, the calculated acceleration or
deceleration of the motion profile can be reported. The sign (positive or negative) of this
reported acceleration depends on the direction of travel and the command type (begin motion
or end motion).
The following table provides example values that illustrate how the sign of AC is reported. It
assumes MV (velocity mode).
VT
Command
Direction
Reported
Sign of AC
100000 G (start motion)
Positive (increasing position)
Positive
100000 X (end motion)
Positive (increasing position)
Negative
-100000 G (start motion)
Negative (decreasing position)
Negative
-100000 X (end motion)
Negative (decreasing position)
Positive
Part 2: Commands: AC
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