108
4600
The SFC program contains data that
cannot be processed.
Read common information of the error
using the peripheral device, check error
step corresponding to its numerical
value (program error location), and
correct the problem.
QnA
4601
Exceeds device range that can be
designated by the SFC program.
QnA
4602
The START instruction in an SFC
program is preceded by an END
instruction.
QnA
4610
The active step information at
presumptive start of an SFC program is
incorrect.
Read common information of the error
using the peripheral device, check error
step corresponding to its numerical
value (program error location), and
correct the problem.
The program is automatically subjected
to an initial start.
QnA
4611
Key-switch was reset during RUN when
presumptive start was designated for
SFC program.
QnA
4620
Startup was executed at a block in the
SFC program that was already started
up.
Read common information of the error
using the peripheral device, check error
step corresponding to its numerical
value (program error location), and
correct the problem.
QnA
4621
Startup was attempted at a block that
does not exist in the SFC program.
• Read the common information of the
error using GX Developer, and check
and correct the error step
corresponding to that value (program
error location).
• Turn ON if the special relay SM321 is
OFF.
QnA
Error
Code
(SD0)
Error Contents and Cause
Corrective Action
Corresponding
CPU