Use this function to manage the program NVRAM area.
2-Series control systems provide about 256KB of memory for NVRAM. Of this 256KB, either 64KB or 128KB can be reserved for NVRAM disk space. The NVRAM disk is separate from program NVRAM.
Information that can be stored in program NVRAM includes:
SIMPL+ global variables (using the "nonvolatile" qualifier or #DEFAULT_NONVOLATILE)
Data written to NVRAM by symbols such as Analog RAM, Analog RAM from Database, Serial RAM, Serial RAM from Database, Analog Non-volatile Ramp and Digital RAM.
To save the contents of program NVRAM to a file
Click the browse button next to the Retrieve list and locate the target directory.
Type a name for the file (it will have a .nv2 extension) and click Open.
Click the Retrieve button. A status bar will display the progress of the file transfer.
To send an NVRAM file to the device
Click the browse button next to the Restore list and locate the .nv2 file.
Click the Send button. A status bar will display the progress of the file transfer. Note that sending a file will overwrite the current contents of NVRAM.
To clear the contents of the program NVRAM area, click the Clear NVRAM button, and then click Yes when prompted to confirm.