Rockwell-automation 1203-EN1 EtherNet/IP-to-SCANport Module User Manual Page 160

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F-16 Supported Emulated Block Transfer Commands
NVS (Non-Volatile Storage) Functions activates the specified NVS
functions.
PLC Block Transfer Emulation Instruction Data
PLC request instruction length: 4 words
Drive response instruction length: 3 words
Figure F.8 NVS Functions Message Structure
Message Operation
The NVS storage function allows three different message requests:
NVS Save saves parameter information from the working memory or
RAM to NVS Storage.
NVS Recall retrieves the last saved data from NVS Storage and places
it in the working memory or RAM.
NVS Default Initialize clears the RAM and NVS Storage and sets all
parameter values to default.
If an error has occurred, response word 1 returns a value of -31998.
NVS Functions
Header
Word 0
PLC Decimal Value
–31998
Header
Word 1
Header
Word 2
PLC Request
Header Word 0
Header Word 1
Header Word 2
Message Length
Message Length
PLC Decimal Value
770 — Message OK
–31998 — Message Error
0
Drive Response
4
0
Data Word 3
NVS Command
Value NVS Command
00
01
02
03
Not Used
NVS Save
NVS Recall
NVS Default Initialize
3
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