Emerson FM-3 - Manual (Page 39)

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Operational Overview
Keep option does not upload the NVM values into the user configuration (PowerTools Pro
file).
The following table shows an example of how these options work:
Updating to RAM
The Update to RAM button can be used to send changes to the FM-3 module without
performing a complete download. The Update to RAM button is found in the PowerTools Pro
toolbar. This operation will send only those changes that have been made since the last
Update to RAM or Device – Download to the FM-3. The changes will take effect
immediately upon clicking on the button.
The parameters will be sent to the FM-3 module without stopping motion or disabling the
drives. Because of this, it is important to use caution when changing motion parameters
while the motor is in motion.
The Update to RAM button saves the parameters only to RAM and not to Non-Volatile
Memory (NVM). Therefore, if the system power is removed, any changes made using the
Update to RAM button will be lost. In order to save changes to NVM, a full-download must
be performed.
The flowchart below describes a typical process using the Update to RAM to make changes,
and then downloading when complete to save changes to NVM.
Before
Download
After Download
Overwrite
Option
Update Option
Keep Option
PT Pro file value for
Index.0.Vel
150 150 500 150
NVM value for
Index.0.Vel
500 150 500 500