ScanMeg SIM-P User Manual

ScanMegInc.     ModuleSIM‐P
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UserManual  16   Version1.3
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Serial link protocol
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Theseriallinktransmitsthedimensionandthepositi on oftheobjectpresentlywithinthefieldof
view.Thecommunicationspeedisselectablebyaccessingtherightparameter menuintheSIM
module.Thenumberofbits,theparityandthenumberofstopbitsarefixedandsetto:
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XXXX,8,N,2whereXXXXrepresents theBaudratesfrom9600to115,200Bds
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Data format
Regardlessifwehaveselectedthedimensionortheposition,thevaluesentontheseriallinkis
writteninBCDASCIIformat.Eachvalueisrepresentedbyafourdigitnumber.Accordingtothe
systemused,
thevalueofthe4digitsis:
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Metric XXXX wherethenumberisin1/10ofmm
Imperial XXXX Wherethenumberisin1/10ofinch
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Forexample,ifthevalueis236,thisvaluewillbesentasthefourdigits0236.Eachdigitis
convertedtoASCII
formatbeforetheSIM‐Pmoduletransmitsthem.Usingthesameexample,0236
willbeconvertedto48,50,51,and54respectivelyorinhexadecimalformthedatasentwillbe:
0x30,0x32,0x33,and0x36.
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Protocol
ThetransmissionalwaysstartswithaLF(0x0A)andfinisheswitha
CR(0x0D).Betweenthesetwo
delimiters,thedimension(4BCDASCIIbytes)andtheposition(4BCDASCIIbytes)arepresentinthe
sameorderasdescribedbelow.Ateachscan,thetransmittingbufferisemptied,andtheSIM
modulewiththetwodelimitercharacterswillalwayssend10bytes.
Insummary,theprotocolis:
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LFDDDDPPPPCR
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Todemonstratethisprotocol,hereisanexample.Ifthescanresultofthescannerisadimensionof
12.2mmandtheobjectislocatedatposition4.6mm,theSIMmodulewillsend:
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LF01220046CR
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InHexadecimal,thiscommunicationis:
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0x0A0x300x31 0x320x320x300x300x340x360x0D
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DimensionPosition

ScanMeg SIM-P Specifications

General

Brand	ScanMeg
Model	SIM-P
Category	Control Unit
Language	English