Watlow EZ-ZONE PM User Manual download pdf (Page 86)

Watlow EZ-ZONE

PM Limit Controller • 83 • Chapter 8 Features

Compact Assembly Class

Alongwiththestandardimplicitassemblywhereeachmoduleparameter(member)occupiesone32-bitas-

sembly location there is also a Compact Class assembly. The need for the Compact Class assembly members

became apparent as the number of member instances grew with the EZ-ZONE family of controls. Because

there is a limited number of implicit assembly members (20 input, 20 output), the Compact Class enables the

user to modify the standard assembly offering to their liking while also achieving much better utilization of

eachbitwithinthe32-bitmember.Asanexample,ifastandardImplicitAssemblymemberwereconfigured

tomonitorAlarmState1theentire32-bitmemberwouldbeconsumedwherejust7bitsoutofthe32willbe

usedtoreflect:Startup(88),None(61),Blocked(12),AlarmLow(8),AlarmHigh(7)orError(28)forAlarm

1only.WithCompactClassassemblymember12(identifiedinthisdocumentas"12AAlarmRead") in use,

thealarmstatesofall4alarmscanbeplacedinone32-bitassemblymemberusingjust2bitsforeachstate.

Bits0and1wouldrepresentAlarmState1,bits2and3AlarmState2,etc...Eachpairof2bitscanrepre-

sentthefollowingstates:00=None,01=AlarmLow,10=AlarmHighand11=Other.Thereisavarietyof

predefined Compact Class members that can be used (See Appendix: Compact Class Assembly Structure) to

modify the default implicit assemblies.

Note:

As is the case with any available parameter within the PM control the Compact Class members can also be

read or written to individually via an explicit message as well.

Modifying Implicit Assembly Members

To change any given member of either assembly (T to O or O to T) simply write the new class, instance and

attribute(CIA)tothememberlocationofchoice.Asanexample,ifitweredesiredtochangethe14

mem-

beroftheTtoOassemblyfromthedefaultparameter(CoolPower)totheCompactClass12

member (See

Appendix: Compact Class Assembly Structure)writethevalueof0x71,0x01and0x0C(Class,Instanceand

Attribute respectively)to0x77,0x02and0x0D.Oncethechangeisexecuted,readingthismemberlocation

(aswasdiscussedabove)willreturntheAlarmStates(1-4)topairedbits0through7where00=None,01=

AlarmLow,10=AlarmHighand11=Other.

The CIP communications instance will always be instance 2.

Profibus DP - (Decentralized Peripherals)

This protocol is typically used to operate sensors and actuators via a centralized controller within industrial-

izedproductiontopologies.Dataratesupto12Mbit/sontwistedpaircablesand/orfiberopticsarepossible.

Thisprotocolisavailableinthreefunctionallygradedversion;DP-V0,DP-V1andDP-V2.Itshouldbenoted

thatWatlowproductsutilizingthisprotocolsupportDP-V0andDP-V1only.

DP-V0-providesthebasicfunctionalityofDP,includingcyclicdataexchange,station,moduleandchannel

specific diagnostics and four different interrupt types for diagnostics and process interrupts.

Cyclic Datareferstoinput/outputdatathatispre-configuredtopassfromtheProfibus-DPClass1Master

and the Slave at a known rate. Cyclic data is expected on both the sender and the receiver end of the mes-

sage.

Note:

TouseDP-V0(cyclicdatatransfer)firstconfigureandthenregistertheGeneralStationDescription(GSD)

file. Watlow provides a software tool allowing for total customization of the data to be read and or written

to.Acquirethissoftwaretool(ProfibusGSDEditor)viatheCDthatshippedwiththeproductor,asanal-

ternative, point your browser to: http://www.watlow.com/products/controllers/software.cfm and navigate to

thebottomofthepageandclickon"SoftwareandDemos"todownloadthesoftware.

UsingtheGSDEditorausercanconfigureuptoamaximumof135differentparametersthatcanbereador

writtentofromZone1through16.

DP-V1-containsenhancementsgearedtowardsprocessautomation,inparticularacyclicdatacommunication

for parameter assignment, operation, visualization and interrupt control of intelligent field devices, in con-

junction with cyclic user data communication.

Acyclic Data is a message that can be sent and or received at any time where they typically have a lower pri-

ority then cyclic messages. This type of messaging is typically used for the purpose of configuration or per-

forming some sort of a diagnostic function.

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 110 111

Comments to this Manuals

No comments

Watlow EZ-ZONE PM User Manual Page 86

Comments to this Manuals

Related products and manuals for Sensors Watlow EZ-ZONE PM