Eaton CF2000 Installation Manual
Also see for CF2000: Installation and operation manualApplication guide
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29Technical Data PR202-50-502-22Effective June 2017CF2000 SystemEATON www.eaton.comProtocol FormatFigure 8. Full Protocol Format (not including repeaters)Normal Communications to DevicesWith the command bits set for the 'Normal' command and theMSB of the three mode bits set at 0, this shortened version of theNormal communications to each device allows the analogue replyor status from each device to be read This format of communica-tion is generally used throughout all background supervision of theaddressable loopAlarm Interrogate CommandThis command is seen by all devices on the loop, so no addressbyte is required, and is periodically sent out during normal commu-nications This command allows any device experiencing an alarmcondition to respond, with call points given the highest priority,reporting their address This causes the control panel to break offfrom general background supervision of the loop and focus directlyon the device in questionFull Protocol FormatWith the command bits set for the 'Normal' command and theMSB of the three mode bits set at 1, the long version of theNormal communications can be sent to any device This wouldnormally be done by the panel following a response to the AlarmInterrogate command, allowing the panel to check the deviceaddress, ID and confirm that the analogue reply, or status, is trulyan alarm condition before actioning the panel sounder outputs, forexampleViewing the Voltage and Current waveforms at the panelLoop 1: Using a Digital Storage Oscilloscope, connect one channelto R84 on the Loop Driver Card; probe 0V clip to the 'Bottom' sideof the resistor; I/P to the 'out-board' side This will display the loopcurrentConnect the other channel to Loop 1, S+ terminal on the mainmother board DO NOT connect the 0v clip of this probeLoop 2: Using a Digital Storage Oscilloscope, connect one channelto R82 on the Loop Driver Card; probe 0V clip to the 'Bottom' sideof the resistor This will display the loop current Connect the otherchannel to Loop 2, S+ terminal on the main mother board DONOT connect the 0v clip of this probe |
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