Keba ServoOne junior Device Help

treatedasrotarySSIencoders(inthiscase,itisimpossibletodeterminethat
thesystemisalinearencodersystembasedontheencoderhead).Likewise,
linearSinCosencoderswithoutanabsolutevalueinterfacearetreatedas
“rotary”encoders(ifrunascommutationencoders,thenumberoftracks,or
lines(Lines)andtheencodergearing(Num, Denom)mustbeusedto
establishtherelationshiptothelinearmotor’smagn.polepairsubdivision).
OnlyinthecaseofSinCosencoderswithdistance-codedreferencemarks
willthesystemdetermine,basedonPeriodLen>0,thattheencodersystem
islinearandnotrotary.
l P 580[0] - ENC_CH3_Info=EncoderInformation
Thisparameterisavailabletotheusersothattheycanenteratextoftheir
choice(max.31characters).Thistextshouldbeusedtodescribethe
encoderonchannelCh3
l P 636[0] - ENC_CH3_CycleCount=Samplingcyclein:nx125µs
(microseconds):
TheCycleCountparametercanbeusedtoslowdownthetimingforthe
cyclicalSSIencoderevaluation.Bydefault,CycleCount=1,i.e.thedefault
settingcorrespondsto125µssamplingandcyclesfortheencoder
evaluation.Differentsettingsmustbeviewedasspecialcasesand
accordinglymustonlybeusedwhennecessary.(seeSection"SSI(cyclical)
X8"onpage89).
l P 630[0] - ENC_CH3_NominalIncrementA=distancecodedabsolute
encoder
P 631[0] - ENC_CH3_NominalIncrementB=distancecodedabsolute
encoder
TheNominalIncrementAandNominalIncrementBparametersmakeit
possibletorunSinCosincrementalencoders(withoutanabsolutevalue
interface)withanaloguedistance-codedreferencemarks.E.g.Ifyouwere
usingtheHeidenhainROD280Cwith18000SinCostracksperrevolution
and36distance-codedreferencemarks,youwouldneedtoset
NominalIncrementAto1000signalperiodsandNominalIncrementBto1001
signalperiods.ThisfunctionalityisenabledifNominalIncrementA>0.(see
Section"Increment-codedreferencemarks"onpage107).
l P 637[0] - ENC_CH3_AbsInitMode=Modeabsolutevalueformation
AbsInitModecanbeusedtoselectvariouspossiblesettingsfortheabsolute
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
88
6 Encoder
valueinitialization:

o
DIG_ANA(0)-Standard:
Absolutevalueinitializationusingamixofthedigitalandanalogue
components(thisisthedefaultmode)

o
DIG(1)-Digital:
Onlythedigitalcomponentwillbeusedfortheabsolutevalue
initialization.

o
SEK_SEL37(2)-Automatic:
DigitalifSTbits>(LineBits+8);otherwisestandard

o
SSI_180(3)-SameasStandard,except:
InthecaseofSSI,thequadrantalignmentofthedigitalvaluerelative
totheanalogueSinCostracksisnotthesameaswithEnDat,butis
insteadoffsetby180degreesrelativetoEnDat,i.e.inthe“naturalQ
alignment”forthedigitalvaluerelativetothetracks.
6.7.6.2.5SSIabsolutevalueinterface
If P570[0] - ENC_CH3_Abs = SSI(1), which is the normal setting, the absolute SSI
encoder position will be read once during the initialization phase; after this, the
cyclical encoder position will be acquired based on the SinCos incremental
component.
The parameters for the SSI interface are described in Section "SSI (cyclical) X8" on
page 89, as are the differences in using the SSI interface with the “cyclical” method
and “one-time reading” method.
6.7.6.2.6EnDatabsolutevalueinterface
If P570[0] - ENC_CH3_Abs = ENDAT(2), the absolute EnDat encoder position will
be read once during the initialization phase; after this, the cyclical encoder position
will be acquired based on the SinCos incremental component.

Keba ServoOne junior Specifications

General

Brand	Keba
Model	ServoOne junior
Category	Controller
Language	English