Table of contentsSection 1 Introduction.........................................................................................................31.1 This manual......................................................................................................................................... 31.2 Intended audience............................................................................................................................. 31.3 Product documentation................................................................................................................... 41.3.1 Product documentation set........................................................................................................ 41.3.2 Document revision history...........................................................................................................51.3.3 Related documents....................................................................................................................... 51.4 Document symbols and conventions............................................................................................. 71.4.1 Symbols............................................................................................................................................71.4.2 Document conventions.................................................................................................................7Section 2 SPA application................................................................................................... 92.1 SPA communication protocol..........................................................................................................92.1.1 Application...................................................................................................................................... 92.1.2 Setting guidelines........................................................................................................................10Section 3 SPA operation principle....................................................................................113.1 Operation principle.......................................................................................................................... 113.1.1 Introduction of SPA protocol..................................................................................................... 113.1.2 SPA protocol..................................................................................................................................113.1.2.1 I/O modules............................................................................................................................... 123.1.2.2 Single command, 16 signals ...................................................................................................123.1.2.3 Event function EVENT..............................................................................................................143.1.2.4 Connection of signals as events............................................................................................153.1.3 Communication ports.................................................................................................................163.2 Design.................................................................................................................................................16Section 4 SPA settings.......................................................................................................174.1 Settings.............................................................................................................................................. 17Section 5 SPA technical data............................................................................................ 195.1 Technical data...................................................................................................................................19Section 6 Establishing connection and verifying the SPA/IEC- communication.......216.1 Establishing connection and verifying the SPA/IEC- communication ................................. 216.1.1 Entering settings......................................................................................................................... 216.1.1.1 Entering SPA settings.............................................................................................................. 216.1.2 Verifying the communication.................................................................................................... 216.1.2.1 Verifying SPA communication............................................................................................... 226.1.3 Fibre optic loop............................................................................................................................ 226.1.4 Optical budget calculation for serial communication with SPA/IEC ............................... 22Section 7 SPA functions.................................................................................................... 23Table of contents1Communication protocol manual