Bronkhorst DeviceNet slave interface Manual do Utilizador descarregar pdf (Página 33)

BRONKHORST®

Page33DeviceNetinterface   9.17.026

9 CHANGINGMACIDANDBAUDRATE

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When you have installed your Bronkhorst meter/controller DeviceNet slave and made right settings for device

configuration and parameter data, you can give your instrument the MAC ID you want. Default instrumentswill be

deliveredwith MAC ID 63.ThisMAC IDhas been agreedbytheDeviceNet organisation to be

freefor installingnew

devicestothebus.ChangingtheMACIDcanbeperformedindifferentways:

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9.1 VIAROTARYSWITCHESONTHESIDEOFTHEINSTRUMENT(IFPRESENT).

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Onthesideoftheinstrumentarerotaryswitchesplacedandalabel

withtheexplanationoftheswitches.Makesuretouseascrewdriver

whichissuitedfortheswitches.

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Theswitcheshavethefollowingfunction:

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9.1.1 DATARATE

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WiththeDATARATEswitchthebaudrateoftheinstrumentcanbeset.

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Datarate BAUDRate

1 125kbps(default)

2 250kbps

5 500kbps

P Programmablemode

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IftheswitchissettoPthebaudrateissoftwareprogrammable.

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Duringinstrumentinitialisation,the DATA RATE switchisread. If the switch specifiesoneofthe valid datarates,i.e.

125,250,500Kbaud, this val ue is used.Ifthe specifieddataratediffersfromthevalue stored

intheinstrument,the

new data rate is saved in memory. If the switch specifies the programmable mode, the value stored in the

instrument’smemorywillbeusedasthedatarate.

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9.1.2 NODEADDRESS(00–63PGM)

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WiththeNODEADDRESSswitchtheMACIDcanbeset.TheMSDisthehighpartofthedecimalnumberandtheLSD

thelowpart.Forinstanceaddress25meansMSDon2andLSDon5.Thedefaultaddressis63.

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Duringinstrumentinitialisation,thenodeaddress

switchesareread.IftheswitchesspecifyavalidDeviceNetMACID,

i.e.a valuefrom0to63thisvalueisused.IfthespecifiedMACIDdiffersfromthevaluestoredintheinstrument,the

newMACIDissavedinmemory.Iftheswitchesspecifyaninvalid

DeviceNetMACID,i.e.avaluegreaterthan63,the

valuestoredintheinstrument’smemorywillbeusedastheMACID.

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IftheaddressissetbytheswitchanditisnotonthePpositiontheinstrumentwillrespondwitherrorstatuscode0E

(Attributenot

settable)ifbysoftwareistriedtochangetheaddress.

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