Beckhoff KS31 2 Series Manual page 52

Data structures
For lower firmware versions, bits R32.14 and R32.15 are not evaluated.
These terminals always set the error bit SB1.6 [} 44] during the calibration and cannot indicate the stability
error!
R33: User scaling - offset
This register contains the offset of the user scaling. The user scaling can be activated in the feature register
through bit R32.0 [} 50] (16 bit signed integer).
R34: User scaling - gain
This register contains the gain of the user scaling. The user scaling can be activated in the feature register
through bit R32.0 [} 50] (16 bit unsigned integer x 2-
R35: Limit value 1
Limit value 1 is entered in register R35. The limit value can be activated in the feature register through bit
R32.9 [} 50].
R36: Limit value 2
Limit value 2 is entered in register R36. The limit value can be activated in the feature register through bit
R32.10 [} 50].
R37: Filter constants of the A/D converter, and configuration bits for the filter
(default value: 35C0 )
hex
The terminal has two low-pass filter stages:
• The first stage consists of a sinc
• The second stage consists of a 22nd order FIR filter. This can be deactivated.
Bit 15 14 13
Name Filter constants SF (SF.11 to SF.0)
Key
Bit Name
R37.15 Filter constant SF
(SF.11 - SF.0)
...
R37.4
Bit Name
R37.3 Zero
R37.2 Zero
Do not change
Bits R37.2 and R37.3 must always be ZERO, otherwise errors will occur in the A/D converter!
52
3
filter, and is always active.
12 11 10 9
Description
The filter constant SF specifies the 3dB limit frequency of the sinc
filter. The value ranges from 150 to 2047.
The 3 dB limit frequency F
are calculated as follows: (see following table)
Skip = 0
Skip = 1
Description
0 See note below
bin
0
bin
Version: 2.6.0
8
+ 1. 1 corresponds to 0x0100).
dec
8 7 6 5
and the 64.5 dB stop frequency F
Limit
F
Limit
F
Stop
F
Limit
4 3 2 1
Zero Zero SkipFIR Fast
3
Stop
= 11981 / SF
= 43008 / SF
= 80486 / SF
KL31x2/KS31x2
0
Default
35C
hex
(860 )
dec
Default
0
bin
0
bin