Omron CP1H-CPU - 05-2006 Operation Manual page 504

Troubleshooting
Errors Created with for FAL Instructions
Flash Memory Errors
Interrupt Task Errors
Seven-segment display
0.0. 8.b. 8.0. 0.0.
8.0. 0.f.
8.0. s.f..
A FAL instruction was executed in the program to create a non-fatal error.
Seven-segment display
FAL instruction
4.1. 0.1.
executed (FAL
number 001)
FAL instruction
4.2. 0.0.
executed (FAL
number 256)
FAL instruction
4.2. f.f.
executed (FAL
number 511)
Reference Information
Error flag
Error code (A400)
Error information
Seven-segment
display
0.0. f.1.
Reference Information
Error flag
Error code (A400)
Error information
0.0. 8.b.
Unit number of the interrupt task error
Special I/O Unit An interrupt task error occurs when the Detect Interrupt task errors set-
unit number 0 ting in the PLC Setup is set to Detect and an attempt is made to refresh a
Special I/O Unit from an interrupt task with IORF(097) while the Unit's I/O
Special I/O Unit
is being refreshed by cyclic refreshing (duplicate refreshing).
unit number 15
Review the program to see whether detecting interrupt task errors can be
Special I/O Unit
disabled or avoided.
unit number 95
Reference Information
Error flag
Error code (A400)
Error information
Probable cause and possible remedy
The executed FAL number 001 to 511 will be stored
in A360 to A391. The number 4 will be added to the
front of 101 to 2FF (which correspond to executed
FAL numbers 001 to 511) and the result will be
stored in A400 as error code 4101 to 42FF.
Check the conditions for executing FAL instructions
and remove any causes of the user-defined error.
FAL Error Flag, A402.15
4101 to 42FF
None
Probable cause and possible remedy
A315.15 will turn ON when writing to the internal flash memory
fails. Replace the CPU Unit when the internal flash memory has
been written to more than 100,000 times.
Flash Memory Error Flag, A315.15
Other non-fatal flags, A402.00
None
None
Probable cause and possible remedy
Interrupt Task Error Flag, A402.13
008B
Interrupt Task Error, A426
Section 9-2
473