Clearing a lost RF link error does not restore communications. Banner recommends determining and resolving the cause of the RF link
error, then allowing the system to auto-recover the lost communications.
In the sample system shown, the communication link between the Gateway and Node 1 has failed. Node 1 must have its ‘Node Link
Failure’ flag set to allow its outputs to be set to the defined default state when it cannot communicate with the Gateway.
Polling Interval. The global ‘polling interval’ defines the time interval during which the Node should expect a polling request from the
Gateway.
Out of Sync. An ‘out of sync’ condition is met when a Node fails to receive the Gateway’s beacon within a factory-set time period, about
10 seconds. Both the ‘out of sync’ and ‘polling interval’ conditions are used to detect a failure because the Node can remain in sync with
the Gateway but be unable to transmit data. If the Gateway drops out of the network, the Nodes will detect the ‘out of sync’ condition long
before the polling interval expires.
Units Defined
The units parameter defines the range and/or type of data value associated with an input or output.
Selecting Units from within any configuration tool changes the units definition of several parameters, including threshold, hysteresis, and
delta. For example, if the units are 0-20 mA, the threshold, hysteresis, and delta values are entered as milliampere values. Selecting
Temp C changes the threshold, hysteresis, and delta units to degrees Celsius.
Signed values range from −32768 to +32767 and allow for the measurement of negative values. Signed values are typically used for
measuring temperatures. Signed values are stored as two's complement values.
Unsigned values range from 0 to 65535 and are used to measure values that do not go below zero, such as 4 to 20 mA, distance, or a
counter.
Input Units
Units Description
Definition
0
Raw
Displays the raw A/D conversion data with data ranges from 0 to 65535. This units type is typically used
only for factory calibration.
LCD: Raw A/D hex value
1
4 to 20 mA
Analog unit. Modbus register contents are scaled such that 0 represents 4 mA and 65535 represents 20
mA.
LCD: 4.00mA–20.00mA
2
0 to 20 mA
Default analog input unit. Modbus register contents are scaled such that 0 represents 0 mA and 65535
represents 20 mA.
LCD: 0.00mA–20.00mA
3
Discrete (ON/
OFF)
Default discrete input unit.
LCD: ON/OFF
4
0 to 10V (Volts) Analog input using 0 to 10V instead of current. Modbus register contents are scaled such that 0 represents
0V and 65535 represents 10V.
LCD: 0.00V–10.00V
6
Temp °C
Celsius, high resolution. Analog input for temperature devices such as thermocouples, RTD, and thermis-
tors. In high resolution mode, temperature = (Modbus register value) ÷ 20.
LCD: 0000.0C
7
Temp °F
Fahrenheit, high resolution. Analog input for temperature devices such as thermocouples, RTD, and ther-
mistors. In high resolution mode, temperature = (Modbus register value) ÷ 20.
LCD: 0000.0F
SureCross Wireless I/O Network Manual
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rev. I