Output Off Function - Omron CJ - PROGRAMMING MANUAL 08-2008 Programming Manual

Diagnostic Functions
6-7-2

Output OFF Function

336
In addition to system-generated errors, the PLC records user-defined
FAL(006) and FALS(007) errors, making it easier to track the operating status
of the system.
Refer to the section on troubleshooting in the CS/CJ Series Operation Manual
for details.
Note A user-defined error is generated when FAL(006) or FALS(007) is executed in
the program. The execution conditions of these instructions constitute the
user-defined error conditions. FAL(006) generates a non-fatal error and
FALS(007) generates a fatal error that stops program execution.
When more than 20 errors occur, the oldest error data (in A100 to A104) is
deleted, the remaining 19 records are shifted down by one record, and the
newest record is stored in A195 to A199.
Order of
Error code
occurrence
The number of records is stored in binary in the Error Log Pointer (A300). The
pointer is not incremented when more than 20 errors have occurred.
As an emergency measure when an error occurs, all outputs from Output
Units can be turned OFF by turning ON the Output OFF Bit (A50015). The
operating mode will remain in RUN or MONITOR mode, but all outputs will be
turned OFF.
Note Normally (when IOM Hold Bit = OFF), all outputs from Output Units are turned
OFF when the operating mode is changed from RUN/MONITOR mode to
PROGRAM mode. The Output OFF Bit can be used to turn OFF all outputs
without switching to PROGRAM mode and stopping program execution.
Error Log Area
Error code
Error contents
Minute, second
Day, hour
Year, month
Error code
Error contents
Minute, second
Day, hour
Year, month
Error code
Error contents
Minute, second
Day, hour
Year, month
Error Log Pointer
Section 6-7
Time of
occurrence
Time of
occurrence
Time of
occurrence