Banner A-GAGE MINI-ARRAY MAC Series - Page 40

40 P/N 43298 rev. E
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MINI-ARRAY
®
InstructionManual
Appendix
ASCII Format Data Transmission
TherearetwoASCIIformats.Theoneuseddependsuponwhichmeasurement
modesareselected.FortheALLmeasurementmode,eachdatabyteispresented
inaneightbitASCIIformatwhichconveysthestatusoffourconsecutivechannels
(fourconsecutivebeams).Eachsubsequentbyteconveysthestatusofthenextfour
channels,untilthestatusofallchannelsisreported.
TheallowabledatavaluesaretheASCIInumbers0to9andtheASCIIlettersAtoF.In
thetableshowninFigureA-1,the0representsaclearchannel,andthe1representsa
blockedchannel.
TheothermeasurementmodesusethreeASCIIbytestorepresenttheirvalues.For
example,ifMeas1is FBB andMeas2isLBB,andthemeasuredvaluesare6and
120,andthecontrollerIDisA,thenthedatastringisasfollows:
0x1c A 0 0 6 1 2 0 0x0a
Thecontrollerallowssuppressionofcleardata.Thismeansthatdataissentonetime
whenthearrayiscompletelyclear(i.e.,whennobeamsareblocked),andnofurther
dataissentuntiloneormorebeamsisblocked.
Binary Format Data Transmission
Therearetwobinaryformats.Theoneuseddependsuponwhichmeasurementmodes
areselected.FortheALLmeasurementmode,eachdatabyteconveysthestatusof
eightconsecutivebeams.Eachbitofthebyteisdirectlyrelatedtothestatusofan
individualchannel.
Asanexample,ifthefirsteightbeamsareasfollows...
Channel Status Binary Code
   1 Blocked 1
   2 Clear  0
   3 Blocked 1
   4 Blocked 1
   5 Clear  0
   6 Blocked 1
   7 Clear  0
   8 Clear  0
...thenthedatabytehasthehexvalueof0x2d or45 decimal.Ifthearrayhas32
opticalchannels,thentherewouldbe4databytesrepresentingthestatusofall32
opticalchannels.Theothermeasurementmodesusetwobytestorepresentthe
measuredvalue.Thefirstofthetwobytesisthemostsignificant.Asanexample,the
valueof262fortheFBB measurementmodeiscodedbythetwo-bytenumber:
0x01 0x06.
Figure A-1. ASCII Data Values
Definitions for ASCII Data Values
FortheALL measurementmode
 Character Ch4 Ch3 Ch2 Ch1
 F 1 1 1 1
E 1 1 1 0
 D 1 1 0 1
 C 1 1 0 0
 B 1 0 1 1
A 1 0 1 0
9 1 0 0 1
8 1 0 0 0
 7 0 1 1 1
 6 0 1 1 0
 5 0 1 0 1
4 0 1 0 0
3 0 0 1 1
2 0 0 1 0
1 0 0 0 1
0 0 0 0 0