DeviceNet Modules, Series 90-30, Manual, GFK-2196

3Configuring I/O Messaging Connections for Slaves added to the MasterI/O Messaging is the term used for the routine and automatic exchange of data between the masterand slaves in a DeviceNet system. Each configured I/O Message defines a dedicatedcommunication path between a producing device and one or more consuming devices. Once theseconnections have been established, I/O Messaging communications occur automatically duringsystem operation.Each Series 90-30 device in a DeviceNet system can be set up for up to two different I/OMessaging connections. Each connection can be disabled (the default), or set up for Polled,Strobed, Change-of-State, or Cyclic operation. Connections should be configured to meet the needsof the application. For example, the master might Strobe all the input-only slave devices and Pollthe remaining slave devices.The selection made for one I/O Messaging connection to a slave determines which connectiontypes remain available for the same slave's other I/O Messaging connection, as shown by the tablebelow. For example, you can only select one polling connection for a device.Selected for OneConnectionDisabledPolledStrobedCosCyclicAvailable for the Other ConnectionDisabled, polled, strobe, cos. cyclicDisabled, strobed, cos, cyclicDisabled, polled, cos, cyclicDisabled, polled, strobedDisabled, polled, strobedConfiguration of each of these connection types is described on the following pages.3-10 Series 90®-30 Programmable Controller DeviceNet Modules – November 2002 GFK-2196