Radio Link Time-Out and Recovery (Non-Host Connected Systems)The SureCross® wireless devices employ a deterministic link time-out method to address RF link interruption or failure. As soon as aspecific Node/Gateway RF link fails, all pertinent wired outputs are de-energized until the link is recovered (see component data sheet formore information.) Through this process, users of Banner wireless networks can be assured that disruptions in the communications linkresult in predictable system behavior.The link time-out feature uses a fully-acknowledged polling method to determine the RF link status of each Node on the network. If after aspecified number of sequential polling cycles the Node does not acknowledge a message, the Gateway considers the link with that Nodetimed out. LCD displays on both the Node and Gateway show *ERROR. Following a time-out, the Node de-energizes outputs and theGateway sets all outputs linked to the Node in question to a de-energized state. Inputs from the Node mapped to outputs on the Gatewayare suspended during a link time-out.Once a link has failed, the Gateway must receive a specified number of good RF communications packets from the Node in questionbefore the link is reinstated. Outputs are restored to current values when the link is recovered.SureCross Wireless I/O Network Manualrev. I www.bannerengineering.com - tel: 763-544-3164 91
