Datalogic AMT58 Series, Руководство пользователя

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AMT58x-PB Profibus®
25
6.4.2 Bytes 11…14 Counts per revolution
WARNING
You can set a new value next to the
Counts per revolution item
only if Class 2 functionality = ENABLED; if Scaling function
control = ENABLED the set resolution values are enabled and used
by the encoder; on the contrary, if Scaling function control =
DISABLED you are allowed to set new resolution values, however
they are not enabled even if sent to the encoder: the encoder still
goes on using the default values uploaded from the GSD file, NOT
the new entered values, until you enable the
Scaling function
control.
See the section “6.4.1 Byte 10 – Operating parameters” on page 23.
Counts per revolution parameter allows to program a user specific
singleturn resolution (i.e. the desired number of information per
revolution).
Byte 11 12 13 14
Bit 31-24 23-16 15-8 7-0
Data 2
31
to 2
24
2
23
to 2
16
2
15
to 2
8
2
7
to 2
0
Allowed values are equal to or lower than Hardware counts per
revolution value. We suggest setting power of 2 values (1, 2, 4, …
2048, 4096, …).
Setting a value greater than allowed causes the resolution to be
forced to Hardware counts per revolution value.
Default = 262144 (min. = 1, max. = 262144) for HS58
Default = 65536 (min. = 1, max. = 65536) for HM58
WARNING
When you set a new value next to
Counts per revolution item,
please always check also Total resolution item value and be sure
that the resulting number of revolution complies with the Hardware
number of revolutions of the device.
Let's say our encoder is programmed as follows:
Counts per revolution : 8192
Total resolution = 33554432
10
= 8192 (cpr) * 4096 (rev.)
Let's set a new singleturn resolution, for instance: Counts per
revolution = 360.
If we do not change the Errore. L'origine riferimento non è stata
trovata. value at the same time, we will get the following result:
Number of revolutions
=
33554432 ( Total resolution )
= 93206.755...
360 ( Counts per revolution )