Stops 
The models of master memories are different. 
Use the master memories created with the 
same model. 
       
A 
*1) 
       
E26 
User’s ROM 
error 
Stops 
FP-e, FP0, FP0R, FPΣ and FP1 C14, C16: 
Probably a hardware abnormality. 
⇒ Please contact your dealer. 
A  A  A  A  A
 
A 
A  A  A 
FP-X:  
When the master memory cassette is 
mounted, the master memory cassette may 
be damaged. Remove the master memory, 
and check whether the ERROR turns off.  
When the ERROR turned off, rewrite the 
master memory as its contents are damaged, 
and use it again. 
When the ERROR does not turn off, please 
contact your dealer. 
FP1 C24, C40, C56, C72 and FP-M: 
Probably an abnormality in the memory unit 
⇒Program the memory unit again and try to 
operate. If the same error is detected, try to 
operate with another memory unit. 
FP2, FP2SH, FP10SH and FP3: 
There may be a problem with the installed 
ROM. 
-ROM is not installed. 
-ROM contents are damaged. 
-Program size stored on the ROM is larger 
than the capacity of the ROM 
⇒
E27 
Unit 
installation 
error 
Stops 
Units installed exceed the limitations.(i.e.,4 or 
more link units) 
⇒ Turn off the power and re-configure units 
referring to the hardware manual. 
    A  A  A 
A 
A  A  A 
E28 
System 
register 
error 
Stops 
Probably an abnormality in the system 
register. 
⇒ Check the system register setting or