Instruction Manual PSx3xxSE
17
3.4
Drag error
3.4.1 Monitoring
During a positioning run, the instrument compares the computed target position with the
current actual value. If the difference is greater than the value "drag error" (S-0-0159), a
warning (C2D) is generated (diagnosis code: 0xC00E2028). This applies in particular if the
target speed cannot be achieved due to external influences (required torque, motor voltage too
low). Monitoring of the drag error can be deactivated by setting S-0-0159 to 0.
3.4.2 Correction
The drag error correction can be activated with P-0-0159. The target rpm is increased or
reduced by the specified factor proportionally to the drag error. It is recommended that you set
the parameter to 4.
3.5
Readjustment
When P-0-0900 is set to the value 1, the drive performs a readjustment if it is pushed out of
the positioning window after a run has been completed. If the loop length (S-0-0058) is not
equal to 0, the drive will only readjust if it is pushed out of position in the direction of the loop. If
the loop length = 0, the drive will readjust in both directions.
If a stop command is sent, the drive will only readjust when a new run command is sent.
This function is only available for drives without brake.
3.6
Absolute measuring system
The PSx3xxSE actuator includes an absolute measuring system capable of covering a range
of 256 rotations. In order to prevent an overrun if the drive is rotated by an external force when
it is switched off, the drive can be positioned in a range of 250 rotations. The three lower and
upper rotations of the measurement range are therefore blocked.
Removal of the supply voltage to the motor has no effect on the internal
measurement system.
3.6.1 Positioning range (S-0-0278)
S-0-0278 is used to map the desired positioning range onto the physical range of the machine.
In the delivery state, the drive is at position 51200, the upper limit switch is set to 101200 and
the lower limit switch is set to 1200, yielding a positioning range of ±125 rotations (±50000
increments). If the desired positioning range does not exceed ±125 rotations, none of the
steps described below are required to set the range.
The following two options are available to allow you to realise any desired positioning run
distances independently of the run distance set by the mounting orientation of the
measurement system (physical positioning range):
1.
Bring the axle to be moved (e.g. a spindle) into the desired position, run the drive to the
appropriate position with the adjustable collar open and then close the adjustable collar.
Examples:
Bring the axle to be positioned into the mid-position, run the drive to the mid-position (position
51200) with the adjustable collar open, then close the adjustable collar. The drive can now run
125 rotations in both directions (default ±50000 increments).
Summary of Contents for PS*3**SE series
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