83 - 23/May/97
3.2.36 Command: RN - Minimum of R/D resolution
Function:
it allows to set the minimum of Resolver to Digital converter
resolution. The R/D resolution will automatically be switched
according to actual speed for optimum system performance
between RN (minimum) and RX (maximum).
RN must be the maximum R/D resolution according to max speed
(see Tab. 3.6)
If RN equals RX, the R/D resolution is fixed.
Syntax:
data monitoring:
n
address RN <CR>
data input:
n
address RN n <CR>
Address type:
axis
Unit of measure:
bit
Range:
10, 12, 14 and 16 (it must be
≤
RX)
Default:
-
Password:
yes
(
∗
) addressing:
no
Opposite to:
-
See also:
RX, SE, Tab. 3.6
Example:
n
2 NP 8 <CR>:
allows to set the resolver pole number of axis 2 to 8
n
2 MV 3000 <CR>: allows to set max velocity of axis 2 to 3000 rpm
n
2 RN 12 <CR>:
allows to set min R/D resolution to 12 bit (max R/D resolution with 8 poles/ 3000 rpm
according to Tab. 3.6)
n
2 RN <CR>:
questions axis 2 about the minimum of R/D resolution. The answer is: "A02 MINIMAL
R/D RES. = 12".
Tab. 3.6 - Max speed versus R/D resolution
Resolution (bit)
10
12
14
16
Max speed with 2 pole
resolver (rpm)
28800
14000
3510
877
Max speed with 6 pole
resolver (rpm)
18700
4600
1170
292
Max speed with 8 pole
resolver (rpm)
14000
3510
877
219
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