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FM-3 Programming Module Reference Manual
The units for the Time parameter depend on the current setting of the Time Base parameter.
If Time Base is set to “Realtime” (default), then the units for the Time parameter are Seconds.
The user can program the index time with resolution of 0.001 Seconds (or milliseconds). If
Time Base is set to “Synchronized”, the units for the Time parameter are defined by the
Master Distance Units found on the Master Setup screen.
Doing a synchronized Timed Index means that the user can specify the master distance in
which the index should be performed. This can be very useful in many synchronized motion
applications.
The internal calculations are designed to calculate a triangular profile (all accel and decel)
The ratio of acceleration to deceleration will be the same ratio as Max. Acceleration to Max.
Deceleration parameters. For example, if the deceleration is desired to be twice the
acceleration, a number twice the value of max acceleration would we entered for maximum
deceleration. If the Maximum Velocity is low enough such that the profile will become
trapezoidal (some duration at max velocity). Even in trapezoidal moves, the same ratio of
acceleration and deceleration is maintained.
The calculations are based on the assumption that Feedrate Override is set to 100%. If set to
greater that 100%, the motor could run in excess of the specified Max. Velocity.
Figure 60: Timed Index Profiles
Enable Index PLS
This check box enables (when checked) or disables the Index PLS function.
An Index PLS is similar to a global PLS (explained in the PLS View section), but is
incremental in nature. The Index PLS has On and Off points just like a global PLS, but the
On and Off points are specified as an incremental distance from the start of the index, instead
of absolute positions. Each index has its’ own On and Off points, and the Index.#.PLSStatus
Triangle
Move
T
rapezoidal
Move
Max Accel
Max Velocity
Max Decel
Index.ProfileLimited activate
s
for this profile
Time