User's Manual

CHAPTER4
UTILITIES&FEATURES
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Revised: 25 Jan 17 4-10 ESTeem Horizon Series
ModbusMonitor ing
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TheESTeemHorizonSeriessupportsModbusTCPprotocolforaccesstomu lt ipl eoperatingparametersinthewireless
modemand RFnetworkhealthstatus.Frequency, bandwidth,receivesignalstrength ,RFdata ratesand GPSdata
(withGPSoptioninstalled)areafewoftheregistersavailablethroughtheopenModbusTCPprotocol.WithHorizon
f
irmwa re version201701131128orlater,thisdatacanbeobtainedbypollingtheregistersdirectlyorusingavailab l e
utilities(Fig.1)
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ThefollowingaretheModbusregisterssupportedintheESTeemHorizonSeriesonPort502.Registersaremapped
as32‐bitfloatingpointnumbers(2registerseach):
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RadioInformation
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Function Register Example 
3 1 2412Frequency
3 3 20ChannelBandwidth
 5–199 Reserved
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Figure13:ModbusTestUtil it yExample