Omniflex Omni8m C1477B Series User Manual
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Contents
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C1477B User Manual (UMC1477BR04) - 14 - Copyright Omniflex6. OPERATION6.1 Power-upWhen power is applied to the Omni8, the unit commences an automatic, built-in circuit testroutine. This results in the unit sounding the audible for approximately half a second followed bythe cyclic illumination of each lamp in turn from 1 to 8 and back to 1 again etc. in a “marchingsequence”.If no internal faults are detected in the unit, then this test mode display continues until theAcknowledge Pushbutton is pressed or until an input enters the alarm state.If a fault was detected, then the unit will display a fault indication by continuously flashing one ofthe lamps. If this occurs, then the unit must be sent for service.If a new alarm occurs while the Omni8 is in this test routine, the unit will immediately revert toits normal mode of operation and will deal with the alarm state according to the pre-selectedalarm sequence.6.2 Normal OperationDuring the normal operation, the Omni8 will act upon any alarm states according to its pre-setalarm sequences. (The instructions for setting-up these sequences are given in SECTION 3.3).Section 8 provides detailed block diagrams for the function of each alarm sequence.When an alarm condition occurs and the horn sounds, the operator should depress the relevantpushbuttons, where necessary, according to the pre-selected alarm sequence.When the Omni8 is put into its test routine by depressing the TEST pushbutton, any existingalarm states are “remembered” and the alarm annunciator will revert to its previous state when itreturns to its normal mode of operation.If a new alarm state occurs while the Omni8 is performing its test routine, the unit willimmediately revert to its normal mode of operation and deal with the alarm state according tothe pre-selected alarm sequence.6.3 Test Functions6.3.1 Overview of the Test FunctionsThe Test button operates as a combined lamp test and circuit test function.No information is lost during the entire test routine, and each alarm display returns to theexact state it was in before the test.6.3.2 Pressing the Test ButtonWhen the Test button is pressed, the unit checks the results of its regular full circuit test,and if all checks performed pass, then a normal lamp test is performed by illuminating allof the lamps while the Lamp Test Pushbutton is held down.If the circuit Test fails then the unit enters its “marching sequence” test routine described inSection 6.3.5 and the test failure code will be displayed by flashing one of the lampscontinuously.In this way, the display/annunciator Test button acts both as a Lamp Test and CircuitFunction.6.3.3 Fault Indication on Circuit TestIf a fault is found in one of the tests performed, then the unit enters its full “marching lampsequence”, with, in addition, one or more of the lamps flashing continuously to indicate thefault located. This is described in detail in Section 6.3.5 |
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