Lika CANopen SFA-10000-CB, User Manual

Page: 63 / 88

SFA-5000 • SFA-10000 CANopen®
Setting the total resolution 6002-00 Total measuring range
(2
25
=0200
0000h)
Master  Encoder (Set request)
COB-ID Cmd Index Sub Process data
600+ID 23 02 60 00 00 00 00 02
Encoder  Master (Set confirmation)
COB-ID Cmd Index Sub Process data
580+ID 60 02 60 00 00 00 00 00
WARNING
When you set a new value next to the
6002-00 Total measuring range
object,
please always check also the
6001-00 Measuring units per revolution
object
value and be sure that the resulting number of revolutions complies with the
Hardware number of revolutions
of the device.
Let's suppose that the draw-wire encoder is programmed as follows:
6001-00 Measuring units per revolution : 8,192 cpr
6002-00 Total measuring range
= 33,554,432 = 8,192 (cpr) * 4,096 (rev.)
Let's set a new total resolution, for instance:
6002-00 Total measuring range
= 360.
As the
6002-00 Total measuring range
must be greater than or equal to the
6001-00 Measuring units per revolution
, the above setting is not allowed.
When this happens, the encoder falls into an error signalling the faulty
condition through the diagnostic LEDs (see on page 34).
WARNING
Every time you enable the scaling function (bit 2
Scaling function
in the
6000-00 Operating parameters
object) and/or change the value in the scaled
values (
6001-00 Measuring units per revolution
and
6002-00 Total
measuring range
objects), then you are required to set a new preset value (see
the
6003-00 Preset value
object) and finally save the new parameters (see the
1010-01 Store parameters
object).
EXAMPLE
Draw-wire encoder
SFA-5000-CB-8192-M12
The physical values are as follows:
Stroke per turn of the drum = 200 mm (7.874”)
6501-00 Physical singleturn resolution
, physical resolution per turn = 13
bits = 8,192 cpr
6502-00 Number of hardware distinguishable revolutions
, number of
physical revolutions = 12 bits = 4,096 revolutions
Total physical resolution = 25 bits = 33,554,432 information
MAN SFA_5000_10000_CB E 1.0.odt 6 - CANopen® interface 63 of 88