Mitsubishi QJ71LP21 Reference Manual page 337

8 TROUBLESHOOTING
Error
Code Error Contents and Cause
*1
(SD0)
The active step information at
4610 presumptive start of an SFC program
is incorrect.
Key-switch was reset during RUN
4611 when presumptive start was
designated for SFC program.
Startup was executed at a block in the
4620 SFC program that was already started
up.
Startup was attempted at a block that
4621
does not exist in the SFC program.
Startup was executed at a block in the
4630 SFC program that was already started
up.
• Startup was attempted at the step
that does not exist in the SFC
program.
Or, the step that does not exist in the
SFC program was specified for end.
• Forced transition was executed
4631
based on the transition condition
that does not exit in the SFC
program.
Or, the transition condition for forced
transition that does not exit in the
SFC program was canceled.
There were too many simultaneous
4632 active steps in blocks that can be
designated by the SFC program.
There were too many simultaneous
4633 active steps in all blocks that can be
designated.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
*12 : This applies to the CPU module of function version B or later.
8 - 126
Corrective Action
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.
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.
• 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 SM321 ON if it is OFF.
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.
• 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 SM321 ON if it is OFF.
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.
MELSEC-Q
Corresponding
CPU
QnA
Qn(H)
QnPH
QnPRH
QnA
Q00J/Q00/
*12
Q01
Qn(H)
QnPH
QnPRH
QnA
Qn(H)
QnPH
QnPRH
QnA
Q00J/Q00/
*12
Q01
Qn(H)
QnPH
QnPRH
QnA
Qn(H)
QnPH
QnPRH
8 - 126