G4 Multi Channel Weighing Instrument. PM/DT/HE Technical Manual

G4 Multi Channel Weighing Instrument5. OperationGeneralG4 instrument with strain gauge transducers is designed mainly for weighing andbatching purposes. The measurement values are displayed at the front panel, and canalso be transmitted to a master computer/PLC.The measurement values can also be presented as the output signal from an analogoutput module.Some functions in the instrument can be controlled by digital input signals, and digitaloutputs from the instrument can be used to indicate actual status of instrument, scales,levels and so on. The number of inputs and outputs may be expanded by connection ofadditional I/O modules.Power supplyThe instrument is powered by 24 VDC or 110/230 VAC and should not be turned offduring weekends and over-night. Continuous power supply to electronics andtransducers prevents moisture condensation in the units.Power-up sequenceAs the G4 instrument is started it enters the Starting up state.If any error is detected during power-up, the sequence stops and an error codewill be displayed. If the error is not fatal it will be possible to enter the menu system tocorrect possible set-up errors.If the detected error is fatal, it will only be possible to select restart unless the error is adatabase file problem. If the start-up error is a database file error it will be possible toselect between deleting the database file, entering program upgrade or restart.Deleting the database or upgrading the program (also upgrading to the presentprogram version) will result in a new database to be created which may make theinstrument usable again. Note that settings will be default after creating a newdatabase. If the fatal error persists please contact your supplier.If no errors are detected, the instrument can enter normal operation (automaticstart-up), displaying actual weight values, possibly together with other instrumentinformation.If ‘Manual start-up’ is selected, the instrument enters the ‘Wait for start’ state,displaying a message ‘Waiting for start command. Press START to continue!’.When the operator presses the ‘START’ button on the screen, the instrument willswitch over to normal operation unless a warm up time is set and there is still aremaining warm up time. In this case the ‘Warming up’ message will bedisplayed. See below.If a warm up time has been set the message ‘Warming up.’ will be displayedtogether with the remaining time. When the warm up time has expired theinstrument will switch over to normal operation automatically.5-1