Omron CJ2 CPU UNIT SOFTWARE User Manual page 196

5 Understanding Programming
Program Errors
Program error
No END Instruction
Error During Task Execu-
tion
Instruction Processing
Error (P_ER Flag ON) and
Stop Operation set for
Instruction Errors in PLC
Setup
Illegal Access Error
(P_AER Flag ON) and Stop
Operation set for Instruc-
tion Errors in PLC Setup
Indirect DM/EM BCD Error
and Stop Operation set for
Instruction Errors in PLC
Setup
Differentiation Address
Overflow Error
Illegal Instruction Error
UM (User Memory) Over-
flow Error
5-104
Description
An END instruction is not present in the pro-
gram.
No task is ready in the cycle.
No program is allocated to a task.
The corresponding interrupt task number is
not present even though the execution condi-
tion for the interrupt task was met.
The wrong data values were provided in the
operand when an attempt was made to exe-
cute an instruction.
A read or write was executed for a parameter
area.
A read or write was executed for a memory
area that is not mounted.
A read or write was executed for an EM Area
Bank specified as EM File Memory.
A write was executed to a read-only area.
The value specified in an indirect DM/EM
address in BCD mode was not BCD.
The value specified in an indirect DM/EM
address in BCD mode is not BCD.
During online editing, more than 131,071 dif-
ferentiated instructions have been inserted or
deleted.
An attempt was made to execute an instruc-
tion that cannot be executed.
An attempt was made to execute instruction
data stored beyond the last address in user
memory (UM) defined as program storage
area.
Related flags
The No END Flag (A295.11) turns
ON.
The Task Error Flag (295.12) turns
ON.
The ER Flag turns ON and the
Instruction Processing Error Flag
(A295.08) turns ON if Stop Opera-
tion set for Instruction Errors in
PLC Setup.
AER Flag turns ON and the Illegal
Access Error Flag (A295.10) turns
ON if Stop Operation set for
Instruction Errors in PLC Setup
The Access Error Flag will turn
ON. If the Stop CPU on Instruction
Error Check Box is selected in the
PLC Setup, then the Indirect
DM/EM BCD Error Flag (A295.09)
will also turn ON.
The Differentiation Overflow Error
Flag (A295.13) turns ON.
The UM (User Memory) Overflow
Flag (A295.14) turns ON.
The UM (User Memory) Overflow
Flag (A295.15) turns ON.
CJ2 CPU Unit Software User's Manual