Mitsubishi Electric M800 Series Manual page 128

M800/M80/E80/C80 Series Alarm/Parameter Manual
10 User PLC Alarms (U)
U10 Illegal PLC
Details
Number of data over (at PLC system startup)
The total number of "comment files", "PLC message files", and "source information files" stored in built-in ROM
exceeded the maximum.
Remedy
Remedy the error in either of the following methods.
(1) Select [Format PLC memory] with GX Developer and format the memory after setting [Target memory] to
[Memory card(RAM)]. After that, write "comment file", "PLC message file", and "source information file"
again.
(2) Create a ladder with [Add New Data] in built-in PLC editing function and execute "Format". After that, write
"sequence program", "comment file", "PLC message file", and "source information file" again.
U10 Illegal PLC
Details
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.)
Remedy
Check the branch destination of the CJ and CALL instructions existing in the steps occurred.
U10 Illegal PLC
Details
Label duplication error (Before executing PLC)
(1) When using the multi-programming method:
- Global labels are duplicated
- Local labels are duplicated within the same file
(2) When using the independent program method, labels are duplicated.
Remedy
Correct the duplication of the labels existing in the steps occurred.
U10 Illegal PLC
Details
Local label over (Before executing PLC)
The boundary value set with the PC parameter (global label boundary value) has been exceeded by the total
number of local labels.
Remedy
(1) Reduce the number of local labels used.
- Use as sequentially as possible from P0.
(2) Reset the PC parameter (global label boundary value).
U10 Illegal PLC
Details
Global label boundary value error (Before executing PLC)
The content of PC parameter (global label boundary value) is not normal.
(1) When using the multi-programming method, a value greater than the maximum value is set.
(2) When using the independent program method, the global label boundary value is set.
Remedy
(1) When using the multi-programming method, correct the global label boundary value to an appropriate value.
(2) When using the independent program method, delete the global label boundary value.
0x130*
0x20xx.yy
0x21xx.yy
0x22xx.yy
0x230*.yy
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Number of steps
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IB-1501279-H