User's Manual

SureCross™ DX80 Quick Start Guide
18 P/N 128185 Rev B
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: [phone]
RF Link Time-Out and Recovery
The SureCross™ DX80 wireless devices employ a deterministic link time-out method to address RF link interruption or failure. As
soon as a specific Node/Gateway RF link fails, all pertinent wired outputs are de-energized until the link is recovered (see component
data sheet for more information.) Through this process, users of Banner wireless networks can be assured that disruptions in the
communications link will result 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
a specified number of sequential polling cycles the Node does not acknowledge a message, the Gateway considers the link with the
Node timed out. LCD displays on both the Node and Gateway show *ERROR. Following a time-out, the Node de-energizes outputs and
the Gateway sets all outputs linked to the Node in question to a de-energized state. Inputs from the Nodes are mapped to outputs on
the Gateway and are suspended during a link timeout.
Once a link has failed, the Gateway must receive a specified number of good RF communications packets from the Node in question
before the link is reinstated. Outputs are restored to current values when the link is recovered.
For information regarding Host-connected systems and link time-out and recover, please refer to Banner’s DX80 and Modbus Guide.
Link between Gateway and Node 1 timed out.
Link between Gateway and Node 1 recovered.
Troubleshooting