CDHD
Configuration and Operation
User Manual
33
4.5
Managing Drive Parameters
The CDHD drive has two types of memory for storing the drive’s parameters:
Flash: Non-volatile memory. It holds the drive’s default parameter values
(contained within the drive’s firmware), as well as the saved set of
parameters. After you have tested and confirmed that the drive is
performing as intended, save the parameters to the flash memory. You
should also save them to a file as a backup.
RAM: Volatile memory. The drive’s working memory. Parameter values are
maintained in RAM while you configure and test the drive and adjust
parameters. If power to the drive is disconnected, any unsaved changes in
the parameters will be lost.
During power up, the CDHD loads parameter values from the flash memory to
the RAM, and a checksum of these parameter values is calculated. If the
checksum is invalid, default parameter values (which are hard-coded in the
drive’s firmware) are loaded into RAM and a Parameter Memory Checksum
Failure fault is set.
Drive parameters may be saved to non-volatile memory at any time by clicking
on the Save icon in the ServoStudio toolbar.
The Parameters Table in ServoStudio includes additional options for loading and
saving the drive’s parameters.
Load from Drive Loads into RAM the parameter values last saved in the
non-volatile memory. Use this option to revert to the
previous saved configuration.
Write to Drive
Saves the parameters currently in RAM to the non-volatile
memory.
Load from PC
Loads into RAM parameter from a file on your PC.
Write to PC
Saves parameters from RAM to a file on your PC.
