6.37.1 Function descriptions................................................................................................................................................................................................160
6.38 Multi-inputs............................................................................................................................................................................................................................163
6.39 Input function selection..................................................................................................................................................................................................165
6.40 Wire fail detection.............................................................................................................................................................................................................. 165
6.41 External analogue set points.......................................................................................................................................................................................166
6.41.1 External analogue set point terminals............................................................................................................................................................... 167
6.41.2 Other sources of external analogue set points.............................................................................................................................................. 167
6.42 Outputs.................................................................................................................................................................................................................................... 167
6.42.1 Function description.................................................................................................................................................................................................. 167
6.43 Limit relay...............................................................................................................................................................................................................................168
6.44 Step-up and step-down transformer........................................................................................................................................................................169
6.44.1 Step-up transformer.................................................................................................................................................................................................. 169
6.44.2 Vector group for step-up transformer.................................................................................................................................................................170
6.44.3 Setup of step-up transformer and measurement transformer................................................................................................................. 174
6.44.4 Vector group for step-down transformer........................................................................................................................................................... 175
6.44.5 Setup of step-down transformer and measurement transformer........................................................................................................... 176
6.45 Demand of peak currents.............................................................................................................................................................................................. 177
6.45.1 I thermal demand........................................................................................................................................................................................................177
6.45.2 I max. demand.............................................................................................................................................................................................................177
6.46 AC average.............................................................................................................................................................................................................................177
6.47 Differential measurement.............................................................................................................................................................................................. 178
6.48 Counters..................................................................................................................................................................................................................................180
6.49 Pulse input counters........................................................................................................................................................................................................ 181
6.50 kWh/kvarh counters..........................................................................................................................................................................................................181
7. General purpose PID
7.1 Introduction..............................................................................................................................................................................................................................182
7.1.1 General purpose PID analogue loop.................................................................................................................................................................... 182
7.1.2 GP PID interface in USW.......................................................................................................................................................................................... 182
7.2 Inputs...........................................................................................................................................................................................................................................183
7.2.1 Inputs..................................................................................................................................................................................................................................183
7.2.2 Dynamic input selection............................................................................................................................................................................................. 185
7.3 Output......................................................................................................................................................................................................................................... 186
7.3.1 Explanation of output settings................................................................................................................................................................................. 186
7.4 Kp gain compensation.......................................................................................................................................................................................................189
7.4.1 Introduction......................................................................................................................................................................................................................189
7.4.2 Load change gain compensation........................................................................................................................................................................... 190
7.4.3 Set point deviation compensation..........................................................................................................................................................................191
7.5 M-Logic.......................................................................................................................................................................................................................................193
7.5.1 Introduction......................................................................................................................................................................................................................193
7.5.2 Events................................................................................................................................................................................................................................193
7.5.3 Commands.......................................................................................................................................................................................................................193
7.6 Example......................................................................................................................................................................................................................................193
DESIGNER'S HANDBOOK 4189341275A EN Page 7 of 196
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