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Checking Programs Section 2-3
Indirect DM/EM BCD Error and Stop
Operation set for Instruction Errors in
PLC Setup
The value specified in an indirect DM/
EM address in BCD mode is not BCD.
AER Flag turns ON and the DM/EM
Indirect BCD Error Flag (A29509) turns
ON if Stop Operation set for Instruction
Errors in PLC Setup
Differentiation Address Overflow Error During online editing, more than
131,071 differentiated instructions have
been inserted or deleted.
The Differentiation Overflow Error Flag
(A29513) turns ON.
UM (User Memory) Overflow Error An attempt was made to execute
instruction data stored beyond the last
address in user memory (UM) defined
as program storage area.
The UM (User Memory) Overflow Flag
(A29516) turns ON.
Illegal Instruction Error An attempt was made to execute an
instruction that cannot be executed.
The Illegal Instruction Flag (A29514)
turns ON.
Program error Description Related flags
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