Nidek Medical ARK-710A User manual

NIDEK
AUTOREFRACTOMETER
ARK-710A
INTERFACE MANUAL
MRK4D*RTZ001B/E
TOTALPAGE:32
2005.2.8

NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan
(Manufacturer) Telephone:[phone]
Facsimile: (0533) 67-6610
NIDEK CO., LTD : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho
(Tokyo Office) Chiyoda-ku,Tokyo101-0051, Japan
Telephone:[phone]
Facsimile: [phone]
Telex: 2226647 NIDEK J
NIDEKINCORPORATED : 47651 Westinghouse Drive Fremont, California 94539, U. S. A.
(United States Agent) Telephone:[phone]
Facsimile: [phone]
NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Perret, 94042 CRETEIL, France
(Authorized Representative) Telephone: [phone]
Facsimile: (01) 49 80 32 08

Table of Contents
§
1OUTLINE ......................................................................................................................1-1
1.1Basic specificationsofinterface ...................................................................................1-1
1.2Singleconductorconnection .......................................................................................1-2
§2 TRANSMISSION SEQUENCE................................................................................... 2-1
2.1 In the case of “NIDEK” .............................................................................................2-1
2.2 In the case of “NCP10”.............................................................................................2-2
§
3COMMAND FORMAT (FOR “NIDEK”) .................................................................3-1
§4 DATAFORMAT ...........................................................................................................4-1
§5 “CR” (CARRIAGE RETURN) CODE .......................................................................5-1
§7 PREPARATION OFINTERFACE ARK-710A EXTERNALPC.............................................. 7-1
§8 INTERFACE PROGRAM ARK-710A EXTERNALPC .............................................................. 8-1
8.1 Flow of the sample program .......................................................................................8-1
8.1.1 When “I/F Mode” is set to NIDEK: ..................................................................8-1
8.1.2 When “I/F Mode” is set to NCP10:...................................................................8-2
8.2 Sample program .........................................................................................................8-3
8.2.1 When “I/F Mode” is set to NIDEK: ..................................................................8-3
8.2.2 When “I/F Mode” is set to NCP10:...................................................................8-5
§9 EXAMPLE OFDATATRANSMISSION ................................................................... 9-1
9.1Printed data andtransmissiondata ..............................................................................9-1
9.2 Sample of KM output data when “I/F Format” is set to Short ......................................9-5
§10 ERROR MESSAGE ON INTERFACE................................................................... 10-1
↔
↔
§6 TRANSMISSION OFSAGITTALMEASURED DATA............................................ 6-1

§1
OUTLINE
In order to transmit the measurement data withARK-710Ato an external computer,ARK-710Ais
providedwithRS-232Cinterfaceasthestandardfunction.Thismanualprovidesthewaytoreceivethe
measurementdatafromARK-710Autilizingthisinterface.
This section introduces the specifications of interface for transmission between ARK-710Aand a
personalcomputer, etc.
1.1 Basic specifications of interface
1)Basicspecifications :ConformtoRS232Cspecifications
2) Connector : DIN 8 pin
3)Transmissionform :Asynchronous(start-stop)
4)Transmissionmode :Halfduplex
5)Transmissionspeed : 9600/4800/2400/1200 bit/sec
6)Bitlength : 8/7 bit
7) Parity check : Odd parity
8) Stop bitlength : 1 bit
9) Data code :ASC II code
10) CR code :YES/NO
*As Transmission mode, Parity check, and Stop bit length are fixed as above, it is necessary for
theexternalcomputertouniformtheseconditions.

1 - 2
1.2 Signal conductor connection
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Externalcomputer
Serialtransmissionport
(RS-232C)
ARK-710A
Interface connector side
Connect side of ARK-710Ainterface connector with serial transmission port (RS-232C) of the
externalcomputerbyusingthe aboveinterfacecable(model:OPIF-11)
Theinterfacecablecanbeusedwitheither“Nidek”or“NCP10”of theI/Fmode(transmissionsequence).
If the connector of the external computer side is different from the above (Dsub 9P), a conversion
adapter is needed.
Dsub 9P (female) DIN8P

§2
TRANSMISSION SEQUENCE
Two kinds of the transmission sequences, “NIDEK” and “NCP10”, can be selected by setup of the
“I/F Mode” of the parameter.
Communication sequence NIDEK NCP10
DTR/DSR control Yes No
RS/SD command control Yes No
Data transmission
bythe demand froma PC Available Not available
Checksumdata No Yes
Asetupof"NIDEK" is thesameastheconventionaltransmission sequence.
Pressing buttonperformsdatatransmissioninthe setup of“NCP10”.Sincecomplicatedcontrols
ofDTR/DSRcontrol, andRS/SDcommandcontrol,etc., arenotneeded,“NCP10”can communicate
easilycomparedwith"NIDEK".However,itdoesnotcorrespondtodata transmissionbythedemand
fromapersonal computer side. Please use thetransmissionsequencesuitablefor the purpose.
* Set the parameter «58: Eye Care C (LM)» to “NO” to send the data demanded by an external
computer with the parameter «51: I/F Mode» set to “NIDEK”.
2.1 In the case of “NIDEK”
DTR/DSR control is as follows.
Transmitter
Receiver
Sametiming
Sametiming
T1, T2 ≤0.1 sec.
(Timelimit: T1, T2> 0.1sec.)
Take down DTR as soon as possible after sent and received EOT.

2 - 2
ARK-710A
Print button
RS command
External compute
r
SD command
Data
ARK-710A External compute
r
SD command
Data
CL command
RS/SD command control is as follows.
[When the print button is pressed:]
[When the data is demanded from an external computer:]
2.2 In the case of “NCP10”
ARK-710A
Print button
External compute
r
Data
DTR/DSRcontrolisnot performed. DTR signal of theARK-710Aisalways low on the circuit. DTR
signaloftheexternalcomputersidedoesnotaffectthetransmissionineithercondition.
Moreover since RS/SD command control is not performed, pressing the print button sends the
datadirectly.

§3
COMMAND FORMAT (FOR “NIDEK”)
All characters for the transmitting and receiving data are adapted for ASCII code.
1) RS command (Demands 2) SD command to the external computer from theARK-710A)
2) SD command (Demands measured data transmission to theARK-710Afrom the external
computer)
1) When theAR measured data is demanded:
2) When the KM measured data is demanded:
3) When theAR and KM measured data are demanded:
3)CLcommand(Demands toclearthemeasurementdatatotheARK-710Afromtheexternal
computer)
SOH CRSTX S D ETB EOT
M
SOH CRSTX C L ETB EOT
M
Theallclearprocessing performstotheaboveheader.Whentheallclearprocessingperforms,
the next measurement is prepared such as the time of pressing the print button .
When the measurement is started after preparation, previous data is all cleared and the next
patient’sdataismeasured.
SOH CKSTX S D ETB EOT
M
SOH CRSTX S D ETB EOT
K
SOH CKSTX C L ETB EOT
M
SOH CRSTX C L ETB EOT
K
SOH C*STX R S ETB EOT
*
01H 43H 2AH 2AH 02H 52H 53H 17H 04H
H:HEX(16radix)

§4
DATA FORMAT
71
1)Basicformat
1)AR measured data
○○○
○○○
○○○○
○○○○
○○○○
○○○○
SOH R M STX ETB ETB ETB EOTD
ƒf•[ƒ^ ƒf•[ƒ^
Data Data Data
AftertheARK-710AreceivesSDcommand,itwillstartthetransmissionofthemeasureddatain
thisformat.
When the transmission sequence (I/F Mode) is set to “NCP10”, four digits of checksum are
insertedafter“EOT” of each data format.
2) Transmission data of theARK-710A
a ) Companyname/Modelname b ) Patientnumber
c ) PatientID d ) Dateandtimeofmeasurement
e ) Vertexdistance f ) Workingdistance
g ) Objectivemeasureddata h ) Contactlensconversiondata
3) Data Thenumber insidetheparenthesesindicates thenumberof transmissioncharacter.
a) Company name / Model name
ID code Companyname Modelname
2) KM measured data
○○○
○○○
○○○○
○○○○
○○○○
○○○○
SOH K M STX ETB ETB ETB EOTD
ƒf•[ƒ^ ƒf•[ƒ^ ƒf•[ƒ^
3)AR and KM measured data
○○○
○○○
SOH R M STX ETBD
ƒf•[ƒ^ ƒf•[ƒ^
ƒf•[ƒ^
○○○
○○○
ETB
○○○○
○○○○
○○○○
○○○○
ETB ETB EOT
SOH K M STXD
ƒf•[ƒ^ ƒf•[ƒ^
○○○
○○○
Data Data Data
Data Data Data
Data Data
i ) Trial lens data j ) Pupil distance
k ) KM measured data l ) Corneal size measured data
m) Pupil size measured data n ) Checksum
* When the parameter item No.52 “I/F Format” is set to Short and the only KM data is
demanded (refer to 2) of the section 3), company name and model name are not transmitted.

4 - 2
d)Dataandtimeofmeasurement
1) When “Date Format” is set to “Y.M.D” :
Date code Year(4) Month (2) Date (2) Hour (2) Minute (2) AM/PM (2)
2) When “Date Format” is set to “M.D.Y” :
Date code Year(4)
Month (3) Date (2) Hour (2) Minute (2) AM/PM (2)
3) When “Date Format” is set to “D.M.Y” :
Date code Date (2) Month (3) Year(4) Hour (2) Minute (2) AM/PM (2)
e)Vertex distance
VDcode Vertex distance (5)
b)Patientnumber
Patientnumber(4)No. code
c)Patient ID
Transfer the data when the patient ID is inputted by the bar code reader.
IP code PatientID Transferthe number of inputtedletters(maximum 31 letters).
(20 letters for printing)

4 - 3
g) Objective measured data
Whenselectedvalueistakenafterthreeormoremeasurements,theorder of transmission is
fromtheselectedvaluetoeach value(fromthelastvaluetoformerones).TheorderofR/Lis
from Lto R. If “IOL( * ) Mark” is set toYES, IOLmeasured mark is inserted on the
data that was measured byAR in the condition of indicating the IOLON mark.
1) Left eye data
R/L code (2) SPH(6) CYL(6) AXIS(3)
2)Right eye data
R/L code (2) SPH(6) CYL(6) AXIS(3)
Confidence
code (1)
IOL
measured
mark (1)
Confidence
code (1)
IOL
measured
mark (1)
3)Referencevalue(Confidenceindexis“E”.)
If “Error Data” is set toYES, the data whose Confidence index (indicates the degree of
reliance) is under 5, can be measure as a reference value. In this case, “E” is inserted to the
end of the transmitted data.
R/L code (2) SPH(6) CYL(6) AXIS(3) Confidence
code (1)
E
code
(1)
IOL
measured
mark (1)
“*”
f)Workingdistance
WD code
35
Workingdistance(2)

4 - 4
h)Contactlensconversiondata
1) Left eye data
R/L code (2) SPH(6) CYL(6) AXIS(3)
2)Right eye data
R/L code (2) SPH(6) CYL(6) AXIS(3)
i)Triallensdata
1) Left eye data
R/L code (2) SPH(6) CYL(6) AXIS(3)
2)Right eye data
R/L code (2) SPH(6) CYL(6) AXIS(3)
* If the parameter “TL Print” is set to NO, the trial lens data is not transmitted.
Also, if the selected value could not be obtained, no data is transmitted.
4) Error data
If“ErrorPrint”is settoYES, theErrorisstoredin memoryandtransmittedtogetherwith the
measuredARvalues.
Err. code Kind of error (2)
Kind of error Contents
+0 +SPH range over
-0 -SPH range over
C 0 CYL over
* If the parameter “I/F format” is set to Short;
1)Only the selected value asobjectivemeasured data is transmitted.
2) When the selected value could not be obtained, only the last one in the values whose
confidence index is not under 5 is transmitted.
3)Whenonlyreferencevaluescouldbe obtained, thelastvalueistransmittedsimply.
4)The“Error”data is not transmitted.

4 - 5
j)Pupildistance
1)Whenboth right and left PD valuesaremeasured:
PD code PD(2) R.PD(2) L.PD(2) N.PD (Near point PD) (2)
2)WhenFarpointPDvalueonly:
PD code PD(2) R.PD(2) L.PD(2) N.PD (Near point PD) (2)
* If the parameter “Near PD” is set to NO, only ”??” is transmitted.
* If the PD values are measured more than one time, the measured data is transmitted in new
order.However,iftheparameter“I/Fformat”issettoShort,onlythelastPDvalueistransmitted.
k) KM measured data
Whentheselectedvaluedistakenafterthreeormoremeasurements,theorderoftransmission
isfromtheselectedvaluetoeachvalue(fromthelastvaluetoformerones).Theorder of R/
Lis from L to R.
* If the parameter item No. 52 “I/F Format” is set to Short:
1) Only the selected value as KM measured data is transmitted.
2)Whentheselectedvaluecouldnotbeobtained,onlythelastoneamongthemeasured
data is transmitted.
3) Data (D) (unit of data is Diopter) is not transmitted.
1) Left eye (mm) data
2) Left eye (D) data
R/L code (2)
R/L code (2)

4 - 6
3)Righteye(mm)data
R/L code (2)
R/L code (2)
l) CS (Corneal size) measured data
* If the parameter item No. 52 “I/F Format” is set to Short, this data is not transmitted.
1) Left eye data 2) Righteyedata
R/L code (2) R/L code (2)
m)PS (Pupil size) measureddata
* If the parameter item No. 52 ”I/F Format” is set to Short, the data is not transmitted.
1) Left eye data 2) Righteyedata
R/L code (2) R/L code (2) Target lamp (1)
Target lamp (1)
“Targetlamp” transfers the state of thetargetlampduringPSmeasuring.
N: Target lamp ON
F: Target lamp OFF

4 - 7
n)Checksum
If the parameter “I/F Mode” is set to NCP10, checksum is inserted on the data format. It is
insertedafter“EOT” of each data format.
Data Checksum(4)
Thechecksumisindicatedwiththehexadecimalnumeralof4digits.Thevalueofthechecksum
is the simple sum from "SOH" to "EOT" of the data format. However, the "CR" code is not
obtainedincalculationofthe checksumwhenthe"CR"codeis inserted.

§5
“CR” (CARRIAGE RETURN) CODE
When the personal computer is used as the external computer for receiving the data, it may be
necessarytoinsert“CR”codeintotheendoftransmittingdataforoneline.ItispossibleforARK-
710A to insert “CR” code into the end of the data or not. (Refer to 3) of the section 6 )
Thetransmittingdataareasfollowswhen“CR” code is inserted.
1) RS command with “CR” code
“CR” code is inserted into the end of data.
2) Data with “CR” code (When “I/F Mode” is set to NIDEK)
Data
“CR” code is inserted into both positions after the “ETB” code and the end of data.
3) Data with “CR” code (When “I/F Mode” is set to NCP10)
Checksum
“CR” code is inserted into both positions after the “ETB” code and the end of data.
Data Data
Data Data Data

§6
TRANSMISSION OF SAGITTALMEASURED DATA
ThetransmissionformatofeachdataofSagittal measurementisdescribedhereunder.
Sagittal measurement data are shown in the print out sample as below from following
toKMmeasureddata. Basictransmittingandreceivingsequencesarestipulatedinthe
aforementioned§2.
Printed data byARK-710A Transmission format

1
DKM
NO.0001
DADEC/18/2002.10:50AM
L08.5107.8410008.18
DL39.6643.0510041.36-03.39
FA25
LS07.8608.53+0.16A
LI07.8608.53+0.16A
LT08.5507.87+0.24A
LN08.5507.87+0.24A
LE+0.24+0.16+0.20
LR07.8708.5208.18+0.67
LA-03.39-03.26-00.13
= 01H SOH
= 02H STX
= 17H ETB
= 04H EOT
= 0DH is added in
accodance with setting.

6 - 2
Header : This signifies KM measured data to be transmitted.
Patient number
Measured date and time
KM measured (mm) data : R1(5), RS(5),AXIS(3),AVE(5)
KM measured (D) data : R1(5),AXIS(3),AVE(5), CYL(6)
FixedangleinSagittal measurement:FIXEDANGLE(2)
Sagittal value for SUP. direction : SAGIT1(5), SAGIT2(5), ECC(5),A/F(1)
Sagittal value for INF. direction : SAGIT1(5), SAGIT2(5), ECC(5),A/F(1)
Sagittal value for TEM. direction : SAGIT1(5), SAGIT2(5), ECC(5),A/F(1)
Sagittal value for NAS. direction : SAGIT1(5), SAGIT2(5), ECC(5),A/F(1)
Among the each Sagittal values from to their meanings are :
SAGIT1 :Measuredvalue
SAGIT2 :MeasuredvalueincludingdRO
ECC :Eacheccentricity
A/F :Whethercalculationforconversion axisismadeornot.
(A : Conversion of axis is made.)
Horizontal,Vertical andTotal eccentricity : eh(5), ev(5), E(5)
Each corneal radius values : Rh(5), Rv(5), Ro(t), dRo(5)
Horizontal corneal radius average value :(Rh)
Vertical corneal radius average value :(Rv)
Central corneal radius average value :(Ro)
Central corneal radius differences : (dRo)
Cylindrical diopters and itsdifferencesatcenterandperipheral
: ASTc(6), ASTp(6), dAST(6)
Central corneal cylinder diopter : (ASTc)
Peripheral corneal cylinder diopter : (ASTp)
Difference of corneal cylinder diopter
between center and peripheral : (dAST)
* Values in the parentheses ( ) show the data length.
* When data are output, all data are printed out with the above format
regardless the Sagittal printing format.

§7
PREPARATION OF INTERFACE ARK-710A EXTERNAL PC
Actualtransmissionmethodisexplainedwithattachedsampleprograminthissection.Theexternal
computer uses the IBM PC compatible (IBM100% COMPATIBLE).
1)Connect sideof ARK-710Ainterfaceconnectorwithserial transmission port (RS-232C) of
the external computer by using the interface cable (OPIF-11).
2)Inputthesampleprogramofoneoftransmissionsequencesinto the external computer.
BASIC application uses Visual Basic.
3) Set upARK-710Aas follows.
“I/FMode”:Dependingofthesampleprogram.
“Baud-Rate”:9600
“BitLength”:8
“CR Code” :YES
Refertothe operator’s manual “8.1 Setting parameters”forthesetting method of the
parameter.
4)PerformthemeasurementbytheARK-710Aand presstheprintbutton intheconditionthat
the sample program is operating.
Ifthetransmissionperformsnormally,measureddataisdisplayedonthemonitorofthecomputer.
When “I/F Mode” is set to NCP10When “I/F Mode” is set to NIDEK
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