Yokogawa RotaMASS 3-Series Uživatelský manuál stáhnout pdf (Strana 19)

IM 01R04B08-00E-E 1st edition February 15, 2012 -00

<5. OPERATION OF ROTAMASS 3 SERIES MODBUS COMMUNICATION TYPE>

5-1

5. OPERATION OF ROTAMASS 3 SERIES

MODBUS COMMUNICATION TYPE

5.1 Operation via display

Forgeneralinformationregardingtheoperationviadisplayrefertotheinstructionmanualofthestandard

typeIM01R04B04-00E-E.FortheModbuscommunicationtypetheoperationviadisplayisbasicallythe

same. Extensions and restrictions are described below:

AmenuhasbeenaddedtoDetailedSetuptoconguretheModbuscommunicationsettingsofROTAMASS.

To establish communication please make sure to match the communication settings of your host system.

DuetomemoryrestrictionstheGermanlanguagetextshavebeenremoved.SelectionofGermanmenulan-

guageisthereforenotpossible;alltextswillremaininEnglish.

Currentoutput2isnotavailableforModbuscommunicationtype.Allmenuitemsreferringtocurrentoutput2

havethereforebeenremovedfromthedisplaymenu.

Note:duetotheabilityofcommunicatingviaHARTandModbussimultaneouslytheoperationofthedisplay

menuisslightlyslowerthanexperiencedwithastandarddevice.

5.2 Operation via HART

ROTAMASS3SeriesModbuscommunicationtypesupportsalsofullcongurationviaHARTcommunication

protocol on current output 1.

ForwiringandgeneralinformationregardingtheoperationviaHARTcommunicationprotocolrefertothe

instruction manual of the standard type IM 01R04B04-00E-E.

UnlessaspecialDD/DTMfortheModbuscommunicationtypeisavailablethestandardDD/DTMwillbe

loaded. Therefore a few restrictions apply:

1. TheModbuscommunicationsettingsmenuisnotavailableviaHARTbutonlyinthedisplaymenuof

ROTAMASS.

2. When changing the menu text to German, the display language will remain in English since German

languagetextsarenotavailable.

3. Allsettingsforcurrentoutput2arevisibleinthestandardDD/DTM.However,anysettingsmadefor

currentoutput2willhavenoeffectinthedevicesincethisoutputisnotavailable.

5.3 Operation via Modbus

AllROTAMASS3SeriesModbuscommunicationoptionssupportreadingaccesstoallmeasurementvalues

inholdingandinputregisters.DependingontheoptioncongurationofselectedparametersviaModbusis

also supported.

Fordetailedinformationofavailableparametersrefertothemenutreeinchapter6.

Forcongurationofselectionparametersforeachselectionaspecicvaluehastobewritten.Theselection

valuesarefoundinthetableinchapter7.

Note:TheModbuscommunicationsettingsofROTAMASScanbechangedviaModbus.However,

communicationcontinueswiththeprevioussettings.Thenewsettingswillonlybetakenineffectafter

executionofthefunctionModbusInitoraPoweronofROTAMASS!

Importantnote:Othercommunicationprotocolshandledependenciesandrefreshesofparametersindevice

descriptionles.IntheoppositeModbusaccessesonlysingleregisters(valuesorparameters)andthehost

has usually no information about any other conditions. Furthermore according Modbus specication only few

exception codes for certain transmission errors are dened. Therefore only physical transmission is secured

bytheprotocolbutanylogicalcheckhastobedoneindividuallybythehostsystem.Formoreinformation

refer to chapter 8.

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