User Manual Instruction Manual
Application Notes
13-21
Important: When properly set up, the drive will remember its location during power
cycles (or power loss) unless the load is manually moved during power
down conditions. If this occurs, simply reset the feature using the
procedure above.
13.12 Position Indexer/Speed Profiler
The GV6000 includes a position indexer/speed profiler, which provides either
point-to-point positioning with a position regulator or speed profiling using a velocity
regulator. Point-to-point positioning can be either incremental moves or absolute
moves, which are referenced to home. Encoder feedback (incremental encorder) is
required for the position regulator. Speed profiling steps can be time-based or
triggered by digital inputs, encoder counts or parameter levels. These speed profiling
steps can be operated open loop or with an encoder.
The indexer is programmed by entering data into a 16 step array. Each step has
several varialbes for optimal customization (see below). The steps cans be run in a
continuous cycle or single cyle. The process can also move to or from any step in the
array.
This feature also includes homing capability to a limit switch or a marker pulse using
an automatic homing procedure.
Important: The GV6000 uses an incremental encoder only. Since absolute encoders
are not used, your process must be able accommodate this homing
procedure after a power down or power loss.
13.12.1 Common Guidelines for all Step Types
•
Enabling Position Indexer/Speed Profiler
This feature is enabled by selecting “7 - Pos/Spd Prof” in Speed/Torque Mod (088).
Paramters 700-877 set up indexer/profiler.
• Motor Control Modes
For Position Indexing with an encoder, only FVC Vector Control should be used for
optimum performance.
Figure 13.7 – Limit Switch Operation
End Limit
Switch
Decel Limit
Switch
Decel Limit
Switch
End Limit
Switch
CB A CB
Preset 1 Speed (Slow)Commanded Speed (Normal Operating Speed)
Stop
Preset 1 Speed (Slow) Commanded Speed (Normal Operating Speed)
this direction
only
Stop
this direction
only
Step Type Value Velocity Accel
Time
Decel
Rate
Next Step
Condition
Dwell Batch Next