Serial text [Data] display Programming Guide [ Version 3.4 Firmware ] Issue 7 22 July 2014 This guide applies to the following models: BA488C - Panel mounted, Intrinsically Safe BA484D - Field mounted, Intrinsically Safe BA688C - Panel mounted, Safe Area BA684D - Field mounted, Safe Area Contents Introduction........................................................................................................................................................................1 What’s in this Programming Guide..............................................................................................................................1 What’s in the Instruction Manuals...............................................................................................................................1 What’s in the Modbus Interface Guide.........................................................................................................................1 Other sources of information........................................................................................................................................1 Enhanced Features........................................................................................................................................................2 Instrument Features...........................................................................................................................................................3 Display............................................................................................................................................................................3 Switch Inputs.................................................................................................................................................................3 Switch Outputs...............................................................................................................................................................3 A few words about Modes…..............................................................................................................................................4 Display Features.................................................................................................................................................................5 Write Modes...................................................................................................................................................................5 Background Modes........................................................................................................................................................6 Frames.................................................................................................................................................................................7 Active and Visible Frames.............................................................................................................................................7 Saved Frame Locations.................................................................................................................................................8 The BEKA Protocol............................................................................................................................................................9 Command format.........................................................................................................................................................10 Response format...........................................................................................................................................................10 Operational Modes.......................................................................................................................................................11 CRC Generation...........................................................................................................................................................11 Multidrop Operation:...................................................................................................................................................12 Graphics Transfers...........................................................................................................................................................13 File Format..................................................................................................................................................................13 Downloads....................................................................................................................................................................13 Uploads.........................................................................................................................................................................14 Standard Screens..............................................................................................................................................................15 Cyclic Data........................................................................................................................................................................16 Basic Concepts.............................................................................................................................................................16 Updating using ASCII values......................................................................................................................................16 Updating using Binary Data.......................................................................................................................................17 Data Timeout...............................................................................................................................................................17 Mapped Variables.............................................................................................................................................................18 Scripting & Pattern Matching.........................................................................................................................................18 Command Summary........................................................................................................................................................19 Screen Handling & Text..............................................................................................................................................19 Attributes......................................................................................................................................................................20 Pixel Graphics..............................................................................................................................................................20 Line Graphics...............................................................................................................................................................21 Mapped Variables........................................................................................................................................................21 System...........................................................................................................................................................................22 Scripting.......................................................................................................................................................................23 Command Reference........................................................................................................................................................24 <..> Command........................................................................................................................................................25 <AFn> Active Frame..............................................................................................................................................26 <BDy,x,l> Box Draw..............................................................................................................................................27 <BMn> Background Mode.....................................................................................................................................28 <CA> Centre Align................................................................................................................................................29 <CCn> Check Code...............................................................................................................................................30 <CD> Cyclic Data.................................................................................................................................................31 <CE> Configuration Enable..................................................................................................................................32 <CI> Command Implement....................................................................................................................................33 <CLn> Clear Line..................................................................................................................................................34 <CMy,x> Cursor Move..........................................................................................................................................35