Nortek Signature Series Manual

Contents

Nortek Signature Series Manual Manual pdf 6 page image

Integrator's Guide6© 2017 Nortek AS2 Basic interface conceptThe Nortek Signature Series products command interface are ASCII based and line oriented.Before diving into the chapters covering interfaces and commands, the operational modes andhow to change between the modes are described. Understanding the use and constrains of themodes is important as it is used frequently when communicating with the instrument.2.1 ModesThe current profiler operates in distinct modes. These modes will have several explicit commandsin order control the instrument. The majority of the commands are initiated from the Commandmode. The possible modes for the instrument are:Command = Command and controlData Retrieval = Data download from recorderMeasurement = Data collection modeConfirmation = Confirmation modeFigure: Instrument modes of operationInitializing communication with the instrument is performed by sending a < BREAK >, which isdefined below. The will either set the instrument in Confirmation mode or restartCommand mode. The options for changing mode depends on the present mode of the instrument(see diagram above for clarity). The timeout shown in the diagram occurs if no commands arereceived in the various modes. A timer will then ensure that instrument operation continues. The