Banner A-GAGE MINI-ARRAY MAC Series - Appendix; Host Mode Command; Serial Data Format

P/N 43298 rev. E 39
Banner Engineering Corp. •Minneapolis,MNU.S.A.
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MINI-ARRAY
®
InstructionManual
Appendix
Host Mode Command
TheMINI-ARRAYcontrollercancommunicatewithacomputerorPLCviaeitheran
RS-232connection(allmodels)orRS-485connection(discrete-outputmodels).See
hookupinformationinSection3.4.Thehostcanrespondtooutputfromthecontroller
whenthecontrollerisprogrammedforeithertheContinuousorGatecontrolmode
(seeSection5.5.6).
Alternately,thehostcancontrolsensorscanning.WhentheHostcontrolmodeis
selected,thehostcomputerorcontrollerinitiatesscansusingacommandstring.The
commandstringisathree-bytemessage,consistingof:
 Controlbytewithdecimalvalue248
 ControllerID(oneof16ASCIIlettersAthroughO,asspecifiedinthePSF)
 Scaninitiationbyte(ASCIIletterS)
Thecommandstringisfurtherdefined,asfollows:
 unsignedcharmsg[3];/*declarethreebyteunsignedcharacterarrayusingC
language*/
 msg[0]=248;/*controlbyte*/
 msg[1]=65;/*assumethecontrollerIDistheletterA*/
 msg[2]=83;/*scaninitiationbytewhichistheASCIIletterS*/
Thehosttransmitsthisthree-bytemessageatthedefinedbaudrate.Theformatisone
startbit,onestopbit,evenparity,andeightdatabits.Whenthismessageisreceived
bytheMINI-ARRAYcontroller,thecontrollerinitiatesascan,andthenupdatesits
outputsasrequired.TheMINI-ARRAYcontrollerthenwaitsforthenextcommand
string.
Serial Data Format
Theprogrammedmeasurementmodeormodesdeterminethetypeofinformationthat
istransmitted.Forexample,ifMeas1issetforFBBandMeas2issetforLBB,thenthe
datatransmittedtothehostcontainsthevaluesofthefirstandlastbeamblocked.
TheALLmeasurementmodeprovidesthestatusofallbeamstothehost.TheVHS
modedoesnotprovideserialoutputdata.
Inadditiontomeasurementmodeinformation,thedatatransmissionalsocontainsa
startstringandaterminationbyte.Thestartstringconsistsoftwounsignedcharacter
bytes:
 Hexvalue1C
 ThecontrollerIDvalue
TheterminationbyteistheASCIIcharacterforalinefeed(hexvalue0A).Thesethree
bytesarecollectivelycalledtheHeader.
Appendix. Host Mode Command and Serial Data Format