PSx3xxDP Instruction Manual
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7.5.2 Direction of travel
If the length of the reference loop has been defined, this parameter establishes the direction in
which the drive will approach the target position. If the direction of travel = 0, each position will be
approached without a reference loop. A value of +1 indicates movement to the right (clockwise)
and -1 indicates movement to the left. A reference loop is automatically inserted whenever a
position has been approached from a different direction.
7.5.3 Position correction
If, after a correctly executed positioning run, the drive is forcibly moved out of position in the
opposite direction, the drive will attempt to correct the position provided this parameter is set to 1.
A value of 0 switches this function off. Using devices with an optional holding brake this
parameter must be set to 0.
7.5.4 Jog key operation
This parameter can be used to determine whether jog key commands are sent directly to the
drive. If this parameter is set to 1 and the ‘accept and proceed to position’ bit is not set, then drive
will execute all commands entered via
the jog keys. If this parameter is set to zero, jog key
commands are merely signaled in the status byte. The user can then either perform a manual run
using the bits in the command byte or redirect this action to a different drive.
7.5.5 Hardware resolution
This parameter specifies the internal resolution of the drive and is involved in the process of
translating external positions into an internal position. If this parameter remains at 1024, the
following parameter can be used to set the drive resolution per rotation. (400 corresponds to 400
increments per rotation or 0.01 mm/ increment at a spindle pitch of 4.0 mm.) Changing this
parameter will interrupt any positioning run that is underway and may result in positioning errors.
7.5.6 Software resolution
This parameter, along with the preceding parameter, specifies the drive resolution per rotation
when transmitting the position via the Profibus.
resolution
hardware
resolution
software
rotation
increments
_
_
*
1024
The most practical approach is to leave the hardware resolution set to 1024 and then set the
increments/rotation by adjusting the software resolution. Changing this parameter will interrupt
any positioning run that is underway and may result in positioning errors.
7.5.7 Positioning window
If the discrepancy between the actual and target positions is larger than the value specified in the
‘positioning window’ parameter, the ‘target position reached’ bit will not be activated.
Values should be entered in 1/1024 rotations.
Summary of Contents for PS*3**DP series
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