Contents
1 Introduction............................................................................................. 10
1.1 This manual.............................................................................................................................................10
1.2 Intended audience.................................................................................................................................10
1.3 Product documentation........................................................................................................................11
1.3.1 Product documentation set.................................................................................................11
1.3.2 Document revision history................................................................................................... 11
1.3.3 Related documentation........................................................................................................ 11
1.4 Symbols and conventions.....................................................................................................................11
1.4.1 Symbols....................................................................................................................................11
1.4.2 Document conventions.........................................................................................................12
2 IEC 60870-5-104 overview...................................................................... 13
2.1 IEC 60870-5-104 protocol.....................................................................................................................13
2.2 Standard documentation.....................................................................................................................13
2.3 Communication link modes.................................................................................................................13
2.4 Basic protocol functionality................................................................................................................ 14
3 Vendor-specific implementation...........................................................15
3.1 Protocol instances.................................................................................................................................15
3.2 IEC 60870-5-104 data objects............................................................................................................. 15
3.2.1 Single-point information......................................................................................................15
3.2.2 Double-point information....................................................................................................16
3.2.3 Measured value, short floating point................................................................................ 16
3.2.4 Measured value, scaled integer...........................................................................................17
3.2.5 Integrated totals.................................................................................................................... 17
3.2.6 Step position...........................................................................................................................17
3.2.7 Single command.................................................................................................................... 18
3.2.8 Double command.................................................................................................................. 18
3.3 Value change detection........................................................................................................................ 19
3.3.1 IEC104 protocol cyclic reporting.........................................................................................19
3.3.2 IEC 60870-5-104 data object configuration..................................................................... 19
3.4 IEC 60870-5-104 internal event buffering.........................................................................................19
3.5 Control operations................................................................................................................................20
3.5.1 Single command....................................................................................................................20
3.5.2 Double command..................................................................................................................20
3.6 Integrated totals objects..................................................................................................................... 21
3.6.1 Integrated totals object grouping..................................................................................... 21
3.6.2 Freeze operation alternatives............................................................................................. 22
Contents
REX615
IEC 60870-5-104 Communication Protocol Manual
7