Bill validator of master-slave type and method for download of validator

A bill validator (10) of master-slave type which includes a frame (28);

• a passageway (13) provided within said frame (28);
• conveyer means (16) for transporting a bill inserted from an inlet (12) through said passageway (13) to an outlet (14) along said passageway (13);
• sensor means (20 to 26) positioned in vicinity of said passageway (13) for detecting magnetic or optical feature of the bill;
• and discriminating means (40) for deciding based on signals from said sensor means (20 to 26) whether the bill is genuine or false to control drive of said conveyer means (16);
• said bill validator comprising:
• a download input terminal (46) and a download output terminal (44) provided in said discriminating means (40) which include download information;
• master mode setting means (48) for switching said discriminating means (40) from a validating mode to a master mode;
• slave mode setting means (49) for switching said discriminating means (40) from the validating mode to a slave mode;
• and
• a writable memory (43) provided in said discriminating means (40) to write therein the download information including a download program;
• whereby said discriminating means (40) is switched from the validating mode to the master mode by operation of said master mode setting means (48) to forward said download information to a slave discriminating means (40) according to said download program;
• said slave discriminating means (40) is switched from validating mode to a slave mode by operation of said slave mode setting means (49),
• said download information from said master discriminating means (40) being written in said writable memory (43) of said slave discriminating means (40) via said download output terminal (44) of said master discriminating means (40) and said download input terminal (46) of said slave discriminating means (40).