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
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SOH R M STX ETB ETB ETB EOTD
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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
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SOH K M STX ETB ETB ETB EOTD
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3)AR and KM measured data
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SOH R M STX ETBD
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ETB
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ETB ETB EOT
SOH K M STXD
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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.