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7  APPLICATION INSTRUCTIONS
7.14  File Register Switching Instructions

Processing details

 • Changes the file register file name used in the program to the file name being stored at the device designated by (S). After 

the file name change, comment data being used by the sequence program perform processing in relation to the comment 
data of the file name after the change.

When switching from Drive No. 1/File name B to Drive No. 4/File name B

 • Drive number can be designated from 1 to 4. (The drive number cannot be designated as drive 0 (program memory).) Note 

that available drives vary depending on the CPU module used. Refer to the manual of the CPU module and check the 
drives that can be specified.

 • It is not necessary to designate the extension (.QCD) with the file name.
 • A file name setting can be deleted by designating the NULL character (00H) for the file name.
 • File names designated with this instruction will be given priority even if a drive number and file name have been designated 

in the parameters.

(S):   Character string data of the drive No./file name in which the comment file is set, or head number of the devices where the character string data is stored 

(character string)

J\

U\G

(S)











Basic

Command

Command

QCDSET

QCDSETP

S

S

S

Drive  1 

File name

A

Drive  1 

File name

B

Drive  1 

File name

C

Drive  2 

File name

A

Drive  4 

File name

B

Drive  4 

File name

A

Processing executed to file registers

Setting of a drive number 
and file name

File name of the 

presently used 

comment file

File name of file 

register used after 

the execution of  

QCDSET instruction 

(

)

(

)