Lumel P30U series - Archiving Measured Values; Transducer Memory Structure

69
69
Note: Updating the firmware is only possible when
the transducer and a PC computer are connected
directly(nootherMasterdevicescanbeconnectedusing
theRS-485interface).
Note:Switchingoffthepowersupplyduringthefirmware
updatingprocessmayresultinanunrepairable damage
tothetransducer
5.. Archiving measured values
5..1. Transducer memory structure
 Standard P30U transducers (regardless of the manufactu-
ringvariantcode)areequippedwitha4MBinternalmemoryforstoring
data recorded by the transducer. The default recorded parameter is
thedisplayedvalue,thatisthemeasuredvalueorvalueconvertedusing
mathematical functions and individual input characteristic. It is also
possibletoadditionallyrecordtheseconddisplayedvalueordisplayed
values and all queried values if RS-485 interface works in
Master
or
Monitor
mode.Theinternaltransducermemoryenablesstoring
534,336records.Thememoryisofcircularbuffertype.Afterthememo-
rybecomesfull,theoldestdataisoverwritten.Theinternalarchivecan
beread,copiedandcleared.
 Transducers in P30U-X1XXXXXX variants are equipped
withanSD/SDHCmemorycardslotenablingwritingarchivedatatofiles
ontheexternalSD/SDHCmemorycard.
 Transducers in P30U-X2XXXXXX variants are equipped
withan8GBinternalfilesystemmemory(thecapacityofthefilesystem
memorycanbeincreasedonaspecialorderorduetomanufacturer’s
needs) where the data from the internal memory are automatically
copiedtofiles.DatacanbedownloadedviatheEthernetinterfaceusing
theFTPprotocol.