Siemens LMV5 Series Basic Documentation

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241/278Siemens Building Technologies Basic Documentation LMV51... CC1P7550enHVAC Products 17 Addendum 3: Variable speed drive (VSD) module 01.10.200317.1.6 Fuel meter readingsThe VSD module ascertains the cumulated gas or oil throughout. For each type of fuel,there is one resettable and one nonresettable meter available.Parameter: Volume GasParameter: Volume OilParameter: Volume Gas RParameter: Volume Oil RWhen resetting the fuel meters, the reset date will be stored.Parameter: Reset DateGasParameter: Reset DateOilThe system continuously calculates the throughput of the selected type of fuel. Thecalculation time is dynamic and reaches from 1 to 10 seconds.If the meter delivers no pulse for 10 seconds, the throughput displayed will be «0». Thismeans that with minimum throughput, the sensor’s pulse frequency should be a minimumof 0.1 Hz.The display is smoothed.The maximum frequency is 300 Hz when fuel throughput is at its maximum.Parameter: Curr Flow Rate17.1.7 Process dataIn its operating position, the VSD module records data that show how well the systemcomponents work together (LMV5x.2..., VSD module, VSD, motor and BU).These data can only be read.The «Maximum static deviation» indicates the greatest speed deviation that occurredduring a drive command in modulating operation.Parameter: Max Stat DevThe «Maximum dynamic deviation» indicates the greatest speed deviation between theramp predefined by the VSD module and the measured speed. This information is onlyrelevant in multistage operation.Parameter: Max Dyn DevIn addition, the number of «static deviations» > 0.3 % or > 0.5 % will be counted. Thisgives the number of speed deviations above 0.3 % or 0.5 % that occurred during a drivecommand.The number of deviations > 0.5 % also corresponds to the number of correcting cycles.Parameter: Num Dev >0.3%Parameter: Num Dev >0.5%The process data will only be stored in RAM, which means that they will be reset viareset or lockout reset.