Banner SureCross DX80 Wireless Networks - Manual (Page 20)

Misses’ for that Node. If the ‘Maximum Misses’
is exceeded for any Node, the Gateway gener-
ates an RF timeout error in the Modbus I/O reg-
ister 8 of the appropriate Node. The ‘Maximum
Misses’ is defined as the number of consecutive
polling messages that the Node fails to respond
to. is a calculated value from Polling Interval (sec)
× Maximum Misses.
Heartbeat Configuration
Use this screen to set the system-wide Heartbeat parameters. All Nodes set to use Heartbeat mode will use these parameters.
Link Timeout
Node Heartbeat Interval (sec). The Node sends a "heartbeat" signal to the Gateway every x seconds. For this example, the Node sends
a heartbeat message every 20 seconds.
Number of Misses. If the Node fails to get its heartbeat message to the Gateway, it immediately retries 10 times (for this example). The
length of time these retries take depends on the maximum number of Nodes in the system as set in the Network Size screen. The length
of time in which the Gateway listens for a specific Heartbeat message is defined by the Node's Heartbeat Interval + the time to complete
the Number of Misses + 1 second buffer. The time to complete the selected Number of Misses depends on the Number of Nodes in
System selected in the Network Size screen.
Maximum Radio Timeout (sec). The Maximum Radio Timeout (in seconds) is calculated based on the Heartbeat Interval, the Number of
Misses (retries), and the Number of Nodes in System selected in the Network Size screen. This number indicates the maximum radio
timeout. Under real-world operating conditions, the timeout will be between Max Radio Timeout ÷ 2 and Max Radio Timeout.
After making any changes to the parameters, click on the Send button to send these values to the Gateway.
Timeout Calculator
The Timeout Calculator estimates the length of time between likely timeouts based on the size of the network and its communication
parameters.
Number of Misses (%). Enter the percent of missed packets from the Site Survey you conducted when you installed this network.
Timeout Frequency (Average). The Timeout Frequency Average is the calculation of the average timeout frequency based on your Site
Survey results and the size and performance of your network.
Device Health Configuration
The health parameters are set up by the factory and, for most networks, should not need to be changed. If necessary, use this screen to
set the health modes for each device in the wireless network.
SureCross User Configuration Tool (UCT)
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