Omron NJ-series User Manual page 303

6 Programming
Output Data
variable type
ErrorID WORD
*1 If an instruction error occurs before execution of an instruction, the instruction will not be executed. There-
fore, the value of each output parameter before instruction execution will be retained.
*2 If an instruction error occurs after execution of an instruction, the instruction itself will be regarded as nor-
mally ended. Therefore, the values of output variables of the instruction will be assigned to the output
parameters. Values of the output parameter to which an error occurred are retained as the one before the
instruction execution.
 System-defined variable P_PRGER
The system-defined variable P_PRGER is a flag that indicates the occurrence of an instruction error.
If an instruction error occurs, the value will change to TRUE regardless of when the error occurred.
When the instruction ends normally, the value will be retained.
For the details on P_PRGER, refer to Instruction Error Flag on page 6-118.
 Events
When an instruction error occurs, an event is created for it. For details on events, refer to Events for
Instruction Errors on page 6-119.
Version Information
A CPU Unit with unit version 1.02 is required to create events for instruction errors.
Output Parameters in Ladder Diagrams
The following table shows the values of output parameters when an instruction, user-defined function,
or user-defined function block that is created in a ladder diagram ends normally or has an instruction
error.
Condition
Normal end
Instruction error
6-116
Meaning
Error code on Error end, and
WORD#16#0 on Normal end
Type of output parameter
Power flow output
BOOL parameter output
Parameter output other than BOOL
Power flow output
BOOL parameter output
Parameter output other than BOOL
Value when an instruction error occurs
Before
During
instruction
instruction
*1
execution
execution
WORD#16#0 Error code
Value of output parameter
Values are updated according to the
internal algorithm.
Set to FALSE.
The previous values are retained.
NJ-series CPU Unit Software User's Manual (W501)
After
instruction
*2
execution
WORD#16#0