6.6 Channel 2: Interface X6
Image 6.3: Encoder configuration channel 2 (X6) screen
This screen is used to select the encoder for channel Ch2. This channel is used to
measure position changes periodically and add them up cyclically – this is referred
to as “cyclical evaluation”. Encoder channel Ch2 does not feature an absolute value
interface. In addition to evaluating resolvers, this channel can also be used to
capture “simple” SinCos signals (up to a max. of 1 kHz and with no zero pulse).
Resolvers must always be evaluated using encoder channel Ch2 (P 506 - ENC_
CH2_Sel = RES(1)). The resolver pole pairs are set via P 560[0] - ENC_CH2_Lines.
ID No.: 0842.26B.5-01 Date: 09.2020
ServoOne - Device Help
74
6 Encoder
Resolver basics and requirements
The connected resolver must meet the following criteria:
l
Ccw (positive signal progress corresponds to an anticlockwise direction
when looking at the shaft from above)
l
No transformation phase shift
l
Transformation ratio of approx. 0.5
GPOC is a special KEBA online process for improving the quality of SinCos signals
before they are used to calculate a position. If Sel = RES(1) or Sel = SINCOS(2), this
process may come in handy. For details see Section "Signal correction GPOC (Gain
Phase Offset Correction)" on page 75.
P No.
Index
Name / Settings
Unit Description
506
0
ENC_CH2_Sel
Interface configuration
OFF (0)
No evaluation
RES(1)
Resolver evaluation
SinCos(2)
Resolver excitation shut-off; evaluation of
a Sin/Cos encoder (max 1kHz) possible.
512
0
ENC_CH2_Num
Numerator of encoder gearing [-1...+1]
513
0
ENC_CH2_Denom
Denominator of encoder gearing [only +1]
560
0
ENC_CH2_Lines
Number of pole pairs of resolver
561
0
ENC_CH2_Corr
Encoder correction GPOC
562
ENC_CH2_CorrVal
Signal correction settings
0
OffsetB
Offset, Track B Cosinus
1
OffsetA
Offset, Track A Sinus
2
GainB
Gain, Track B - Cosinus
3
GainA
Gain, Track A -Sinus
4
Phase
Phase difference
563
0
ENC_CH2_EncObsMin
Amplitude monitoring Minimum
564
0
ENC_CH2_Info
Encoder name
565
ENC_CH2_LineDelay
µs
Correction of phase shift for cable lengths
> 50 m (only after consultation with KEBA).
Table 6.16: Encoder configuration channel 2 (X6) parameters