User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE3.2 PROCESS VARIABLE DISPLAYAs discussed above, the operator interface consists of a display screen and associated push buttons. Thedisplay screen shows process variables in one of a number of formats, or operational details (notes or alarmhistory for example), or configuration details for use in setting up the recorder to produce the required displaysand history formats. The remainder of section three discusses the process variable displays, alarm displaysand so on; configuration details are to be found in Section 4.Note: Some of the items below can be selected for use only by users with a suitable permission levelas set up in the ‘Instrument’ ‘Security’ menu described in Section 4.1.6.Figure 3.2 below, depicts a typical trend display and gives details of the various areas of the display page.Current point nameCurrent point ‘pen’Channel 1 6.23VCurrent point value and unitsCurrent point scaleTime/date stampsInstrument nameRecording statusInst name12:01:08Figure 3.2 Typical display screen (Vertical trend)Current time/dateFigure 3.2 shows a vertical trend page. Operating the Raise/Lower push-buttons allows the user to scrollthrough the other display modes: Horizontal trend, Vertical bargraph, horizontal bargraph, numeric, verticaltrend... and so on. All these display modes are described in Section 3.4, below.A display mode can also be selected from the Top level menu ‘Go To View’ item which appears when the‘Page’ key is operated.The scroll button can be used to scroll through the points in the group, overriding the ‘Faceplate Cycling’on or off selection3.2.1 Alarm IconsNotes:1. A full discussion of alarms is given in the Channel Configuration section of this manual (Section4.4.3)2. Trigger alarms do not display threshold marks or bars, or faceplate symbolsThe alarm icons shown below appear in some display modes. The icons on a channel faceplate show thestatus of that channel’s alarm(s), as follows:Icon is flashingalarm is active but unacknowledged or it is an Auto alarm which is no longer activebut which has not been acknowledgedIcon steadily illuminated the alarm is active and has been acknowledged.Alarm thresholds and deviation alarm bars appear for horizontal and vertical trend modes. For deviationbars, the bar stretches from (Reference - Deviation) to (Reference + Deviation). Vertical and Horizontal bargraphmodes display only absolute alarm symbols.Page 10HA030554Issue 7 Nov 12