Yes, check the Driver String for the BASIC driver.
From the Help:
COMMA
DRIVER('BASIC', /COMMA = n' )
[ Comma" = ] SEND(file, 'COMMA [ = n ]' )
Specifies a single character field separator.
n represents the ANSI code for the field separator character. The default is 44, which is equivalent to "/FIELDDELIMITER=1,44."
SEND returns the ASCII code for the field separator character.