Save/Recall/Initialize - Allen-Bradley 1203 Series User Manual

B–16 Supported Block Transfer Messages

Save/Recall/Initialize

0
PLC request 4
Drive response 4
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Save/Recall/Initialize—NVS (Non-Volatile Storage) Functions—
activates the specified function. These functions are also referred to as
EEPROM functions.
PLC Block Transfer Instruction Data
PLC request instruction length: 4 words
Drive response instruction length: 4 words
Figure B.10
PLC Request
Message Length
4
PLC Decimal Value
–31998
0
NVS Command
Value NVS Command
00 Not Used
01 NVS Save
02 NVS Recall
03 NVS Default Initialize
Message Operation
This 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.
Example
This example requests the NVS Storage Save function be performed.
Data File Format
1 2 3
–31998 0* 0, 1, 2, or 3
770 0* 0*
* Example only — These values vary depending on parameters and products.
Message Structure
Header Word 0
PLC Decimal Value
Header Word 1
–31998 — Message Error
Header Word 2
Data Word 3
4 5 6
Drive Response
Header
Message Length
Word 0
4
Header
770 — Message OK
Word 1
Header
0
Word 2
Data
0 or Error Code
Word 3
7 8 9