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Functions, monitoring and protective functions
9.4 Extended functions
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
Aggregate limitation
The total of p0408, p0419 and p2721 is limited to 32 bits.
Note
Load gear problems and solutions, see example in "Position tracking/Measuring gear".
Example of position area extension
With absolute encoders without position tracking, it must be ensured that the traversing
range around 0 is less than half the encoder range, because beyond this range, no unique
reference remains after switching on and off (see the description for parameter p2507). This
traversing range can be extended using the virtual multiturn (p2721).
The following diagram illustrates an absolute encoder that can represent 8 encoder
revolutions (p0412 = 8).
Figure 9-34
616
Position tracking, load gear (p2721 = 24), setting p2504 = p2505 =1 (gear factor = 1)
Converter cabinet units
Operating Instructions, 11/2017, A5E36652151A
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