Beckhoff AX2000 PROFIBUS DP communication profile Manual de usuario descargar pdf (Pagina 29)

4.2.6 Setup mode: position

4.2.6.1 PNU 1773: homing type

This parameter can be used to determine which type of homing run should be applied. The

assignment can be seen in the following table:

PWE Type of homing run

Reference point at the present position

Initiator with resolver zero mark

Hardware limit-switch resolver zero mark

Initiator without resolver zero mark

Hardware limit-switch without resolver zero mark

Zero mark / feedback unit

Reference point at the actual position

Hardware limit-switch with resolver zero mark

Absolute SSI-position

Move to Mechanical Stop

4.2.6.2 PNU 1644: homing direction

This parameter can be used to determine the direction of motion for homing runs. If set equal 0,

then the direction of motion is negative; for a value 1 it is positive, and fora2itdepends on the dis

tance to the reference point in the direction in which the homing run started.

4.2.7 Actual values

4.2.7.1 PNU 1401: speed

The parameter value is the actual speed of the motor in increments / 250 µsec, which are the

amplifier’s internal units.

4.2.7.2 PNU 1402: incremental position, actual value

The parameter value is the actual position value in increments.

4.2.7.3 PNU 1800: actual position value in SI (User) units

The parameter value is the actual SI (user unit) position value.

4.2.7.4 PNU 1414: actual position, 32 bit floating decimal point format

With this object the actual position (see ASCII-command PFB) can be read in a 32 Bit Floating deci

mal point format (IEEE).

Right of decimal point positions will be truncated. This object is, aside from the data format, identi

cal to PNU1800.

Use:

PLC Controls that support only 16 Bit integer and 32 Bit floating decimal point.

PROFIBUS for AX2000/2500 29

BECKHOFF 12/05 Using the parameter channel (PKW)

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Beckhoff AX2000 PROFIBUS DP communication profile Manual de usuario Pagina 29