wo 
WJFF 
Link range 
of 
1 
st 
station. 
Link range 
of 
nth 
station. 
Usable as data registers in each station 
Link range not usable 
as 
data registers 
Usable as data registers in each station 
I 
File registers 
R 
I 
File registers 
(R) 
are  used a extra data registers which  are  located in the  user 
memory area. They operate in the same way as data registers, with the exception 
of clearing the data, and  can be  used within the sequence program. 
To 
clear the 
data in a file  register the FMOV(P) instruction should be used,  if the power of the 
PLC is turned 
OFF 
or  the  PLC  reset function  is executed 
, 
the  data  in the  file 
register will remain unchanged. 
I 
Accumulator 
A 
I 
The accumulator 
(A) 
is a data register which stores the operation results of some of 
the basic and application instructions, a list of which is shown below; 
63