SFA-5000 • SFA-10000 DeviceNet
23-01-10 Resolution per revolution
Number of
revolutions
.
You are allowed to set whatever integer value less than or equal to the
overall
hardware resolution
(see the encoder identification label). The overall
hardware resolution results from:
23-01-2A Hardware counts per revolution
We recommend the
Number of revolutions
to be set to a power of 2.
The set
Number of revolutions
results from the following calculation:
Number of revolutions
=
23-01-11 Total measuring range
23-01-10 Resolution per revolution
Setting the
Number of revolutions
to a value which is a power of 2 is meant
to avoid problems when using the device in endless operations requiring the
physical zero to be overstepped. If you set the
Number of revolutions
which is
not a power of 2, a counting error is generated before the physical zero.
Default = 0200 0000h (33 554 432)
WARNING
When you set a new value next to the
23-01-11 Total measuring range
attribute, please always check also the
23-01-10 Resolution per revolution
attribute value and be sure that the resulting number of revolutions complies
with the Hardware number of revolutions of the device (4,096 revolutions).
Let's suppose that the encoder is programmed as follows:
23-01-10 Resolution per revolution
: 8,192 cpr
23-01-11 Total measuring range
= 33 554 432
10
= 8,192 (cpr) * 4,096 (rev.)
Let's set a new total resolution, for instance:
= 360.
23-01-11 Total measuring range
must be greater than or equal to the
23-01-10 Resolution per revolution
, the above setting is not allowed.
EXAMPLE
We install the following draw-wire encoder:
SFA-5000-FD-8192-M12
.
The physical values are:
Stroke per turn of the drum = 200 mm (7.874”)
Physical resolution per turn = 13 bits = 8,192 cpr
Max. number of physical revolutions = 4,096 revolutions
Total physical resolution = 25 bits = 33 554 432 information
Physical linear resolution = 0.024 mm = 24 µm
Max. number of turns of the drum = 25
Max. measuring length = 5,000 mm (196.85”)
Number of information = 204,800
MAN SFA_5000_10000_FD E 1.0.odt
DeviceNet interface
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Содержание SFA-10000-FD
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