phytron
63
MA 1303-A007 EN
Traversing job for relative positioning
The traversing job contains the following information:
Control value = distance (number of pulses o be executed)
Run command = 2
i
If the "Travel range" parameter has a value other than zero, the TM StepDrive
checks the specified travel distance for the parameterised limit values ("Travel
range" parameter). The distance to the limit switch is not checked by the TM
StepDrive. The travel is stopped at the latest when the limit switch is reached.
Feedback
The "READY" feedback bit is reset at the beginning of incremental mode.
While the positioning is active, it is indicated by the set "Motor is running" feedback bit.
After the positioning has been correctly executed, the set "READY" feedback bit indicates
that the position has been reached.
If the positioning is interrupted this can be recognised from the error bits (e.g. limit switch
error).
8.2.3 Search for Reference
Description of the function
The home position marks the point of reference of the drive system (reference cam) for the
following traversing jobs. You can determine the home position in different ways.
Using a limit switch as a reference
Using e.g. a reference sensor
The TM StepDrive technology module has three inputs S1, S2 and S3.
Each of the inputs can be assigned the functions limit , limit switch - and reference
switch during configuration.
The highest reproducibility of the reference point is achieved by always approaching it
from the same direction and always with the same frequency and step resolution.
The direction is determined by the control data.
Traversing job for search for reference
The sign of the control value defines the direction
Motion command number 3 starts the search for reference
