6. Application Setup
6.1 Parameters
6.1.1 Configuration of parameters
VarCom is a set of proprietary commands and variables or parameters used to configure drive
functions when the host and the drive communicate through a serial connection.
VarCom parameters can be accessed and controlled through the ServoStudio2 software on the
graphical interface screen or the command line terminal screen.
When setting parameters, please pay close attention to any alarm or error messages appearing
on ServoStudio2 and any flashing codes on the digital display of the drive.
Disable the drive before setting motor and feedback parameters.
Many parameters can be modified while the drive is enabled.
However, special attention should still be paid because the motor behavior may change.
If the parameters cannot be modified when the drive is enabled, a drive disable prompt will be
displayed.
6.1.2 Management of parameters - drive memory
The CDHD2S drive has two memory types used to store drive parameters:
⚫ Flash memory: Non-volatile memory. Save drive default parameter values (contained in
the drive firmware) and save parameter sets.
⚫ RAM: Volatile memory. Drive working memory. Parameter values are saved in RAM as you
configure and test the drive and adjust parameters. If the drive is powered off, any unsaved
parameter changes will be lost.
During power-up, the CDHD2S loads parameter values from non-volatile memory into RAM
and calculates a checksum of these parameter values. If the checksum is invalid, the default
parameter value (hard-coded into the drive firmware) will be loaded into RAM and set as
"parameter memory checksum failure" fault.
Specific parameters can be stored on the electronic motor nameplate (MTP), such as those
used in the sensAR magnetic encoder. When detected during power-on conditions, these
parameter values are loaded directly from the encoder memory into the drive RAM.
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