Assessments - 2, GPA: 4
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4 Introduction ................................................................................................................ 4 "GTCZ" and "GT2Z" boards features ......................................................................... 4 Communication settings ........................................................................... 5 JBUS protocol .................................................................................................. 6 Introduction ................................................................................................................ 6 Principle ..................................................................................................................... 7 Synchronizing data exchanges .................................................................................. 7 Description of request and response frames ............................................................. 7 Checking received messages on the slave-side ........................................................ 8 Functions.................................................................................................................... 9 CRC 16 algorithm .................................................................................................... 14 UPS theory of operation .......................................................................... 18 Unitary UPS ............................................................................................................. 18 Parallel connected UPS with "Static Switch" cubicle ............................................... 19 UPS without Mains 2 ................................................................................................ 19 Unitary UPS ..................................................................................................... 21 Block diagram .......................................................................................................... 21 Measured quantities ................................................................................................. 21 Main status bits ........................................................................................................ 22 Operating modes ..................................................................................................... 22 Parallel connected UPS ........................................................................... 24 Block diagram .......................................................................................................... 24 Measured quantities ................................................................................................. 24 Main status bits of system operations ...................................................................... 25 Operating modes ..................................................................................................... 25 Static switch cubicle .................................................................................. 26 Block diagram .......................................................................................................... 26 Measured quantities ................................................................................................. 26 Main status bits of system operations ...................................................................... 27 Operating modes ..................................................................................................... 27 System information .................................................................................... 28 Message format ....................................................................................................... 28 Example of read data ............................................................................................... 28 Sample commands .................................................................................................. 28 List of variable fields ................................................................................................ 28 General definitions ................................................................................................... 29 Signaling field ........................................................................................................... 29 Tables measured data .............................................................................................. 29 Tables of binary data ................................................................................................ 31 Table of control devices ........................................................................................... 33 Telemonitoring information ....................................................................................... 33 Glossary of information descriptors ......................................................................... 34 Glossary of telemonitoring information descriptors .......