Danfoss PLUS+1 Series Technical Information

Also see for PLUS+1 Series: Technical information Technical information

PVG Valve Power SupplyDOUT/PVGpwr pins can provide the battery supply voltage required by Danfoss PVG valve electronics forthose control strategies requiring application software control of the valve power source.When enabled, the DOUT/PVGpwr pin passes battery (reference) voltage to the PVG valve electronics.One DOUT/PVGpwr pin can power up to 3 PVG valves. Refer to individual module API documents for PVGpower pin characteristics.EEPROM Write/EraseRatingsTo prevent unexpected memory writes, care must be taken to ensure memory with a high number ofread/write cycles is either U32 or S32 data types.SpecificationsDescription Minimum Maximum CommentEEPROM write/erase cycles (all modules exceptIX012-010, IX024-010)1 million Minimum valid over entire operatingtemperature range.EEPROM write/erase cycles (IX012-010,IX024-010)10,000 Minimum valid over entire operatingtemperature range.FRAM write/erase cycles(all extended memorymodules-MC0XX-XX8)100 trillion Minimum valid over entire operatingtemperature range.EEPROM used in PLUS+1 controllers is rated for 1million read/write cycles per sector. Sector size is 32 bits.When a value is written to EEPROM, all 32 bits in a particular sector are always written, regardless of thesize of the size of the saved value. If the value being saved in a sector is less than 32 bits (such as. U8, S16,BOLL, etc) adjacent bits in the same EEPROM sector are rewritten with their previous value. Theimplication of this memory property is that if two values are being written to the same memory sector,the useful life of the sector is determined by the value being written most frequently. If that valueexceeds 1 million read/write cycles, all values in the sector may be compromised if the useful life isexceeded.Vault MemorySome variants of PLUS+1 modules have 2 MByte of serial flash vault memory (also referred to asapplication logging memory).Application developers can use this memory to log machine event data and use the PLUS+1 Service Toolto extract the logged data. As there is no real time clock on PLUS+1 modules, vault memory is not timestamped.FRAM MemoryAny of the PLUS+1 extended memory controllers use FRAM memory. FRAM has a write endurance of over100 trillion cycles. This increased write endurance is particularly ideal for datalogging.Accessing non-volatile or application log memory can delay the service tool scan.Technical Information PLUS+1® Controller FamilyProduct Ratings24 520L0719 • Rev PB • Feb 2014