Schneider Electric 890USE19600 Version 1.0 manual Data Exchange, Data and Status, Objects

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Fieldbus Communications Support

Data Exchange

Introduction Process image data is exchanged between the STB NIB 1010 NIM and an INTERBUS fieldbus master in a bit-packed format.

Note: In this discussion, data and words described as input and output are defined relative to the master. For example, the master receives input data and transmits output data.

Data and Status		Data exchange between the island and the INTERBUS master involves three types
Objects		of objects:
			data objects—operating values the INTERBUS master either reads from the input
			modules or writes to the output modules
			status objects—module health records sent by I/O modules and read by the
			INTERBUS master
			echo output data objects—sent by digital object modules to the INTERBUS
			master; these objects are usually a copy of the data objects, but they can contain
			useful information when a digital output point is configured to handle the result of
			a reflex action
		Standard Advantys STB I/O modules support all three of the above objects. Basic
		Advantys STB I/O modules support only data objects, not status or echo objects.
		The following table shows the relationship between different object types and
		different module types. It also shows the size of the different objects:

Module Type				Objects in the Input Data Image		Objects in the Output Data Image

				Objects	Size	Objects	Size

digital input				data	1 byte or less	does not apply

				status1	1 byte or less	does not apply
digital output				echo output data	1 byte or less	data	1 byte or less

				status1	1 byte or less	does not apply
analog input	channel 1			data	2 bytes	does not apply

				status2	1 byte	does not apply
	channel 2			data	2 bytes	does not apply

				status2	1 byte	does not apply
analog output	channel 1			status2	1 byte	data	2 bytes
	channel 2			status2	1 byte	data	2 bytes

1 Echo and status information is not available for every module. For example, basic I/O modules do not report this information. Refer to The Advantys STB Hardware Components Reference Guide (890 USE 172 00) for details.

2 Status information is not available for every analog module. For example, basic analog modules do not report status. Refer to The Advantys STB Hardware Components Reference Guide (890 USE 172 00) for details.

38	890USE19600 April 2004

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Contents Advantys STB 890USE19600 VersionPage Table of Contents Application Example Important Information Safety InformationProcedure Safety Information Validity Note About the BookAt a Glance Construed as a commitment by Schneider ElectricAbout the Book Topic IntroductionSummary What’s in this Chapter? Island Bus I/O What Is Advantys STB?Introduction BasicWhat Is a Network Interface Module? Structural Components of a simplified Interbus network are shown below About InterbusOutputs in 4 ms Physical Layer TopologyInput and output data in the masters buffer NodeAddressing On the shift register ring on which data is circulatedIntroduction What’s in this Product specifications of the basic Interbus NIMSTB NIB Basic NIM Module Chapter?Feature Function External Features of the STB NIB 1010 NIMFeatures Called out in the illustration below HardwareSpace reserved for the network connectors NIM housing Fieldbus Port STB NIB 1010 Fieldbus InterfaceSummary ConnectionsNetworking ConnectorsInterbus CableGeneral LED Physical DescriptionOverview IndicationsNIM Activity LEDsPhysical Power Supply InterfaceIsland is the two-receptacle connector illustrated below DescriptionUse either RightLogic Power Improper Galvanic IsolationRequirements CharacteristicsPower Supply ExternalSTB NIB 1010 Module Specifications Technical SpecificationsConfiguring the Island Bus About the Island Basic island configurationAuto-Addressing Bus AddressAn Example Module Physical Location Island Bus AddressAbout Auto Auto-ConfigurationConfiguration Hinged cover Been successfully configured at least onceRST Button StageScenarios Island Fallback ScenariosFallback HeartbeatFieldbus Communications Support Introduction What’s in this Chapter?High Bytes Interbus ID CodeLow Data TypeData Length Objects Data ExchangeData and Status ObjectsWord InternalProcess Image BoundariesExchange Output DataInput Data Contains the NIM statusApplication Example With an Advantys STB NIB 1010 basic NIMFieldbus network Sample Island AssemblyAssembly Sample IslandI/O modules have the following island bus addresses Model Module Type Island Bus AddressConnection Network Configuration ConsiderationsFor use with an Advantys STB island Devices on an Interbus networkSyCon Before YouBegin ConsiderationsStage Description Using SyCon to Configure an STB Island on InterbusWith SyCon Step Action CommentAdd the NIM To add the NIM to the network configurationConfiguring WorkspaceCreate an EDS InstructionsSaving CMD Using CMD to Configure an STB Island on InterbusIsland slave to your configuration using CMD Island Slave AddAdding DownloadingApplication Example Glossary ARP BOSComs CanCOB CRCEDS DhcpDIN EIAEOS EMCEMI FedpFsdp GSDIEC BaseScanning IEC type 1 inputInput polarity Industrial I/OInput filtering Input responseContact Energized and open when the coil is energizedEnergized and closed when the coil is energized NemaNIM NMTPLC PDMPDO Consumer model Process I/OProducer Profibus DPScada RTDSAP SDOSmmps SnmpTFE StdpTCP Suppress transient voltage surges UDPVaristor Voltage groupIndex Heartbeat message, 34 housing ID code InterbusIndex