SATO CX400 Programming Reference Manual page 25

Section 2: Command Codes
Special Notes
SATO CX400
1. This command must be immediately followed by the <ESC>BW Bar
Code Expansion command.
2. You may use only one variable ratio bar code per label.
3. If the data specified in this command is incorrect, the command is
ignored and the ratio used will be based on the previous setting.
PN 9001106 Rev. A Page 2-9