_NCF204_ReadActualPosition_REAL(

1/3)

FBInstanceArea

StartAddress

EndAddress

Size

NoRetain

H512

H1407

896

Retain

H1408

H1535

128

Timers

T3072

T4095

1024

Counters

C3072

C4095

1024

Specifyunu

sedarea.

Therequire

dsizevariesd

FBInstancerea

StartAddress

EndAddress

Si

NoRetain

D32020

D32767

748

Retain

H1408

H1535

128

Timers

T3072

T4095

1024

Counters

C3072

C4095

1024

NCF204

ReadPresentPosition(REAL)_NCF204_ReadActualPosition_REAL

Basicfunction

Readsthepresentpositionofanaxis.

Symbol

_NCF204_ReadActualPosition_REAL

AlwaysON(P_On) (BOOL) (BOOL)

EN ENO

UnitNo. (INT) (BOOL) NormalendUnitNo Done

AxisNo. (INT) (BOOL) ErrorflagAxis Error

Outputenablebit (BOOL) (WORD) Errorcode

Enable ErrorID

(REAL) PresentpositionPosition

Filename

Lib\FBL\omronlib\PositionController\NCF\NCF204ReadActualPositionREAL12.cxf

Applicablemodels

PositionControlUnit

CJ1W-NCF71,CS1W-NCF71

CPUUnit

CS1*-CPU**HUnitVersion3.0orlaterCJ1*-CPU**HUnitVersion3.0orlaterCJ1M-CPU**UnitVersion3.0orlater

CP1H

CX-Programmer

Version5.0orlater

Languagesinfunctionblock

definitions

Ladderprogramming

Conditionsforusage

ThefollowingconditionsforusageshouldbethePositionControlUnitversion1.2orearlier.(ItwillnotberequiredinthePositionControlUnitversion1.3orlater)

CX-ProgrammerSetting

ThefunctionblocksrelatedtothePositionControlUnitswillnotoperateiftheareaH512orhigher(defaultsetting)isspecifiedastheNonRetainAreathroughtheFunctionblockmemoryallocation.Makesuretochangethememoryareatounusedarea(DMorEM,forexample)fromtheCX-Programmer.Tochangethisvalue,clickPLC/FunctionBlockMemory/FunctionBlockMemoryAllocationfromthe Bar.

FunctionBlockMemoryAllocation[NewPLC1]

OK

CancelEditDefault

ependingontheusedFBandthenumberofFBs.Ifanareabeingusedintheladderprogramisspecifiedorsufficientspacecannotbefound,theCX-Programmerwilldisyacompileerror.

FunctionBlocMemoryAllocation[NewPLC1]

OK

CancelEdit

Default Forexample,tousethememoryareafromD32020toD32767

Advanced (748words),specifythe

addressesasshownintheleft.

Functiondescription

ThepresentpositionoftheaxisofthespecifiedUnitNo.(UnitNo)andAxisNo.(Axis)iscontinuouslyupdatedinthe“Presentposition(Position)”whiletheOutputenablebit(Enable)isON.WhentheOutputenablebit(Enable)turnsOFF,the“Presentposition(Position)”isclearedtoallzeros.

TheNormalend(Done)turnsONwhenthepresentpositiondataisvalid.

TheErrorflag(error)willbeturnedONandtheErrorcode(ErrorID)willbeoutputifanerroroccursfortheFB.(TheywillnotbeturnedONwhenaxiserrorsoccurs.)

ThisstatuswillberesetthentheOutputenablebit(Enable)turnsOFF.

Thesestatus(Done/Error/ErrorID)willberesetthentheOutputenablebit(Enable)turnsOFF.

ENONOFF

ENOONOFF

EnableON

OFF

DoneONOFF

ErrorONOFF

ReadPresentONPositionOFF

KindofFBdefinition

Alwayecutiontype.

ConnecttheENinputtotheAlwaysONFlag(P_On).

Thesameinstancecannotbeusedintwoormoreces.

ENinput

condition

?ConnecttheENinputtotheAlwaysONFlag(P_On).

IfanotherbitisconnectedtoEN,theFBoutputswillbeheldwhentheconnectedbitturnsOFF.

RestrictionsOther

?TheErrorflag(Error)andErrorcode(ErrorID)forthisFBreflectthestatusoftheMemoryAreainthePositionControlUnitwithoutaltion.

?ThisFBusesUnitErrorReset,WriteData,ReadDataandSaveDataBitsofthePositionControlUnit(seeNote).Therefore,donotturnthesebitsONorOFFbetweentheperiodfromtherisingedgeofENtotherisingedgeofENO.Forthesamereason,donotusethesebitsforcoiloutputs(OUTcommands).

?TheoutputvariableofFBmaynotchangeevenifENisturnedON.Inthatcase,checkifanyofUnitErrorReset,WriteData,ReadDataandSaveDataBitisleftON.

Note:

Forcalculationofbitaddresses,thesebitsarereferencedinthisFBinthefirstexecutionofeachinstance,andwhenchanging"UnitNo.(UnitNo)","AxisNo.(Axis)"oftheinputvariableandset“Outputenablebit(Enable)".

Applicationexample

WhenturningtheBitAONfromOFF,thepresentpositionofaxis1oftheServomotorconnectedtothePositionControlUnitwithunitnumber0isreadandstoredinD0.

UnitNo.:0

CPU NCF

Servomotor

Axis1

Sample

_NCF204_ReadActualPosition_REAL

AlwaysON(P_On) (BOOL) (BOOL)

EN ENO

UnitNo. (INT) (BOOL) Normalend

&0 UnitNo Done BitB

AxisNo. (INT) (BOOL) Errorflag

&1 Axis Error BitC

Outputenablebit (BOOL) (WORD) Errorcode

BitA Enable ErrorID D100

(REAL) Presentposition

Position D0

Related

manuals

PositionControlUnitsOPERATIONMANUAL(W426-E1)12-4ErrorCodes

VariableTablesInputVariables

Name

Variablename

Datatype

Default

Range

Description

EN

EN

BOOL

1(ON):FBstarted

0(OFF):FBnotstarted

UnitNo.

UnitNo

INT

&0

&0to&15

Specifytheunitnumber.

AxisNo.

Axis

INT

&1

&1to&16

Specifytheaxisnumber.

Outputenablebit

Enable

BOOL

0(OFF)

TurnONtoenableoutput.TurnOFFtoresettheoutput.

OutputVariables

Name

Variablename

Datatype

Range

Description

ENO

ENO

BOOL

1(ON):FBoperatingnormally

0(OFF):FBnotoperatingnormally

?FBnotstarted

?Inputvariableoutoftherange

?FBendedwitherror

?CommonParameterscouldnotberead

Normalend

Done

BOOL

TurnsONforanormalend.

Errorflag

Error

BOOL

TurnsONforanerrorend.

Errorcode

ErrorID

WORD

ReturnstheerrorcodewhenanerrorhasoccurredintheFB.RefertotheRelatedManualsfordetailsonerrors.

Acodeof#0000willbereturnedifanyofthefollowingconditionsissatisfied.

?Inputvariableisoutofrange.

?ThecommonparametersofthePositionControlUnitsareoutofrange.

?Notestablishedcommunicationswithaspecifiedaxis.

Presentposition

Position

REAL

ThepresentpositionoftheaxiscontrolledbythePositionControlUnit.

VersionHistory

Version

Date

Contents

1.00

2004.06.

Originalproduction

1.10

2005.01.

Limitationaboutthesettingtimingwith"UnitNo."and"AxisNo."wasremoved.

1.20

2007.11.

Limitationonreading“Presentposition(Position)"wasremoved.

UpgradeDetails

Version

DetailedContents

1.10

Inversion1.0x,"UnitNo.(UnitNo)"and"AxisNo.(Axis)"mustbesetwhenENwasONand"Outputenablebit(Enable)"wasOFF.Thismeans