1771-6.5.132, PLC-5 DeviceNet Scanner User Manual

P-6 About This User ManualTerminology This term MeansBridge The scanner module’s support of explicit message transfer.Change of State A type of I/O data communication. The scanner module can send andreceive data with slave devices that have the change of state feature. Datais sent whenever a data change occurs. Data is updated at the rate of theheartbeat.Communication The 1771-SDN scanner module or the 1770-KFD module.ModuleCyclic A type of I/O data communication. The scanner module can send andreceive data with slave devices that have the cyclic feature. Data is onlysent at a user-configurable rate.EDSElectronic Data Sheet. A vendor-supplied template that specifies howinformation is displayed as well as what is an appropriate entry (value).ExplicitMessagingHeartbeat RateHost PlatformI/OImplicitMessagingInput DataMAC IDNetworkNodeOfflineOnlineOutput DataPCPolledRecordRxScanlistScannerSlave ModeStrobedTxA type of messaging used for lower priority tasks, such as configurationand data monitoring.Devices that are configured for change of state data can also send a“heartbeat” signal to indicate proper operation.The computer that hosts the 1771-SDN scanner module.An abbreviation for “input and output”.The type of messaging used for high priority I/O control data; e.g., changeof state, cyclic, polled, or strobed.Data produced by a DeviceNet device and collected by the scanner modulefor a host platform to read.The network address of a DeviceNet node.The DeviceNet network or the RSNetWorx for DeviceNet softwarerepresentation of the network.Hardware that is assigned a single address on the network (also referredto as device).When the PC communication scanner is not communicating on thenetwork.When the PC communication scanner is configured and enabled tocommunicate on the network.Data produced by a host platform that is written to the scanner module’smemory. This data is sent by the scanner module to DeviceNet devices.Abbreviation for an IBM ® compatible personal-computer.A type of input/output-data communication. A polled message solicits aresponse from a single, specified device on the network (a point-to-pointtransfer of data).The node address and channel-specific memory assigned in the scannermodule’s non-volatile storage for a node in the scanlist.An abbreviation for “receive”.The list of devices (nodes) with which the scanner is configured toexchange I/O data.The function of the 1771-SDN scanner module to support the exchange ofI/O with slave modules.The scanner module is in slave mode when it is placed in another scannermodule’s scanlist as a slave device.A type of I/O data communication. A strobed message solicits a responsefrom each strobed device (a multicast transfer). It is a 64-bit message thatcontains one bit for each device on the network.An abbreviation for “transmit”.Publication 1771-6.5.132 - June 2000