Velocity Edge GX440 Instructions d'exploitation télécharger pdf (Page 360)

Functions, monitoring, and protective functions

9.4 Extended functions

Drive converter cabinet units

360 Operating Instructions, 10/2008, A5E00288214A

The absolute encoder adjustment is initiated via p2507[0...3].2, and its successful completion

is reported via p2507[0...3].3. The signal source "Reference point coordinate for the position

controller" p2598[0] is interconnected with p2599 during basic positioning. The other signal

sources are not interconnected in the standard configuration.

The measuring probe evaluation can be enabled for the encoder evaluation x, which is not

assigned to position control, via p2509[x]. The signal sources are assigned via p2510[0...3],

the edge evaluation is set via p2511[0...3]. The measured value is then available in r2523[x]

if the status word for encoder x (encoder 0: r2526.0..9, encoder1: 2627.0..2, encoder2:

r2628.0..2, encoder3: r2529.0..2) has the "Valid measurement" bit set.

The current values of the position actual values of the different encoders can be read out via

parameter r2521[0...3]. These position actual values can be corrected with a signed value

from p2513[0...3] after a 0/1 signal from the signal source in p2512[0...3].

In addition, the velocity actual value (r2522[0...3]) and the position offset for absolute

encoders p2525[0...3] can be processed for each encoder by the higher-level controller.

Load gear position tracking

Position tracking enables reproduction of the motor position when gears are used. It can also

be used to extend the position area.

Position tracking for load gear functions in the same way as position tracking for the

measuring gear (see "Position tracking/Measuring gear"). Position tracking is activated via

parameter p2720.0 = 1. The position tracking of the load gear, however, is only relevant for

the motor encoder (encoder 1). The load gear ratio is entered via parameters p2504 and

p2505. Position tracking can be activated with rotary axes (modulo).

Position tracking for the load gear can only be activated once for each motor data set MDS.

The load position actual value in r2723 (must be requested via Gn_STW.13) is made up of

the following information:

● Encoder pulses per revolution (p0408)

● Fine resolution per revolution (p0419)

● Virtual number of stored revolutions of a rotary absolute encoder (p2721)

● Load gear ratio (p2504/p2505)

● Measuring gear ratio (p0433/p0432), if p0411.0 = 1

Note

The total of p0408, p0419 and p2721 is limited to 32 bits.

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Velocity Edge GX440 Instructions d'exploitation Page 360