Mitsubishi Electric M800VW Series Manual page 616

M800V/M80V Series PLC Development Manual
8 Appendix 2: List of PLC Alarms
Error contents and cause
No sequence program is included in the built-in ROM or temporary
memory area.
(1) Sequence program is not stored in the built-in ROM.
(2) Sequence program is not written from the GX Developer/GX
Works2 or internal PLC edit function.
(3) Sequence program cannot be read due to broken built-in ROM.
(4) No large capacity PLC additional specifications.
Software instruction interruption illegal
An error was found in data for the sequence program in execution.
(1) Sequence program stored in the built-in ROM is broken.
(2) Sequence program under development (before writing into F-
ROM) is broken.
A H/W error was detected during the PLC execution.
The PLC system execution preparation failed.
Ladder count is over limit (at PLC system startup)
The total number of "ladder files" stored in the built-in ROM exceed-
ed the maximum.
Data count is over limit (at PLC system startup)
The total number of "comment files", "PLC message files", and "sym-
bolic information files" stored in the built-in ROM exceeded the max-
imum.
Label branching error (Before executing PLC)
Occurs only when the bit selection parameter (#6452 bit6) "branch
destination label check valid" is set to "1".
(1) The CJ and CALL instructions were placed to a nonexistent label.
(2) The CJ instruction was placed to the global label. (Branching is
possible only with the CALL instruction.)
Label duplication error (Before executing PLC)
(1) When using the multi-programming method
 Labels of common pointer are duplicated
 Labels of local pointer are duplicated within the same file
(2) When using the independent program method, labels are dupli-
cated.
Local label over (Before executing PLC)
 Local label" is as "labels of local pointer".
The boundary value set with the PC parameter (common pointer
boundary value) has been exceeded by the total number of labels of
local pointer.
(1) Write the sequence program from the GX Developer/GX Works2
or internal PLC edit function, and then execute the built-in ROM
writing.
(2) Check the presence of additional specification "Large PLC ca-
pacity" and reconsider the storable size.
(3) If (1) or (2) does not solve the problem, there is a possibility that
built-in ROM is broken.
Contact Mitsubishi Electric.
Contact Mitsubishi Electric.
Contact Mitsubishi Electric.
Write "sequence program", "comment file", "PLC message file", and
"symbolic information file" again.
Remedy the error in either of the following methods.
(1) Select [Format PLC memory] with GX Developer/GX Works2 and
format the memory after setting [Target memory] to [Memory
card(RAM)]. After that, write "comment file", "PLC message file",
and "symbolic information file" again.
(2) Create a ladder with [Add New Data] using the built-in PLC edit-
ing function and execute "Format". After that, write "sequence
program", "comment file", "PLC message file", and "symbolic in-
formation file" again.
Check the branch destination of the CJ and CALL instructions exist-
ing in the steps occurred.
Correct the duplication of the labels existing in the steps occurred.
(1) Reduce the number of local labels used.
 Use as sequentially as possible from P0.
(2) Reset the PC parameter (common pointer boundary value).
591
Remedy
IB-1501614-B