Bronkhorst DeviceNet slave interface Manuel d'utilisateur télécharger pdf (Page 20)

BRONKHORST®

Page20DeviceNetinterface   9.17.026

Furthermore,with theuse of theData‐type attribute(0x03) and Data‐unit attribute(0x04) of the Sensorobject 0x31

and the Controller object 0x33 the user can select one of the following settings for both Explicit and Polled I/O

messages (see paragraph 3.2.2 for a complete list of supported data‐units, the

 settings below are just a few

examples):



Example1(ClassId:0x31,Data‐type:0xC3,Data‐unit:0x010x10):  SignedIntegerCountIndicated‐flow.

Example2(ClassId:0x31,Data‐type:0xC3,Data‐unit:0x000x14):  SignedIntegerSCCM Indicated‐flow.

Example3(ClassId:0x31,Data‐type:0xCA,Data‐unit:0x010x10): Single‐precisionfloating‐pointCountIndicated‐

flow.

Example4(ClassId:0x31,Data‐type:0xCA,Data‐unit:0x000x14): Single‐precisionfloating‐pointSCCMIndicated‐flow.

Example5(ClassId:0x33,Data‐type:0xC3,Data‐unit:0x010x10):  SignedIntegerCountSetpoint.

Example6(ClassId:0x33,Data‐type:0xC3,Data‐unit:0x000x14):  SignedIntegerSCCM Setpoint.

Example7(ClassId:0x33,Data‐type:0xCA,Data‐unit:0x010x10): Single‐precisionfloating‐pointCountSetpoint.

Example8(ClassId:0x33,Data‐type:0xCA,Data‐unit:0x000x14): Single‐precisionfloating‐pointSCCMSetpoint.



ForPolledI/OmessagesonlyData‐typecanbeselected.TheData‐unitattributewillbeautomaticallysetwhenPolled

I/O is started (on receipt of the first Polled I/O Request’s Data). The Data‐unit setting will be determined by the

selectedIOAssemblyInstance(seeparagraph2.5.1,Availabledata

combinationsforPolledI/O).



TheData‐typeandData‐unitAttributecanonlybesetwhentheMFCisintheIdlestate.IftheMFCis

notinthisstate(i.e.,Executingstate)theusermustusetheStopservice(0x07)ofInstance(0x01)ofthe

Supervisor object (0x30) to allow the MFC

to enter the Idle state for making the change. When the

attribute has been set the user can use the Start service (0x06) of the same object and instance to

resumetheExecutingstate.

Example1: Howtoprograminstrumentwithoption1fromabove

Object Instance Servicecode Attribute Value Description

30 1 0x07 stop:instrumenttoidlestate;

greenLEDlongflash:2secon,0.1secoff

31 1 0x10 0x03 0xC3 Datatype=INT

31 1 0x10 0x04 0x010x10 Dataunit=COUNT

30 1 0x06 start:instrumenttoexecutingstategreenLEDon

continuously

Example2: Howtoprograminstrumentwithoption8fromabove

Object Instance Servicecode Attribute Value Description

30 1 0x07



stop:instrumenttoidlestate;

greenLEDshortflash:2secon,0.1secoff

33 1 0x10 0x03 0xCA Datatype=REAL

33 1 0x10 0x04 0x000x14 Dataunit=SCCM

30 1 0x06 start:instrumenttoexecutingstategreenLEDon

continuously

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Bronkhorst DeviceNet slave interface Manuel d'utilisateur Page 20

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