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Diagnostic Functions Section 6-7
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.
6-7-2 Output OFF Function
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.
Application Precaution for
DeviceNet
When the master function is used with the CS1W-DRM21 or CJ1W-DRM21,
all slave outputs will be turned OFF. When the slave function is used, all
inputs to the master will be OFF. When the C200HW-DRM21-V1 is used,
however, slave outputs will not be turned OFF.
6-7-3 Failure Alarm Functions
The FAL(006) and FALS(007) instructions generate user-defined errors.
FAL(006) generates a non-fatal error and FALS(007) generates a fatal error
that stops program execution.
When the user-defined error conditions (execution conditions for FAL(006) or
FAL(007)) are met, the Failure Alarm instruction will be executed and the fol-
lowing processing will be performed.
Error code
Order of
occurrence
Error Log Area
Error code
Year, month
Time of
occurrence
Time of
occurrence
Time of
occurrence
Year, month
Error contents
Minute, second
Day, hour
Year, month
Error code
Error contents
Minute, second
Day, hour
Error code
Error contents
Minute, second
Day, hour
Error Lo
Pointer
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