< 6. Maintenance Functions >
6-8
TI 34M6A82-01E
2nd Edition : Nov. 1, 2002-00
Messages Displayed in the System Log
This displays the operation log of the sequence CPU module. For further details, see the
self-diagnosis section in the “Sequence CPU Instruction Manual-Functions.”
Table System Log Messages
Message Description Action
Startup completed
Initialization after power OFF completed
normally
None
Momentary power failure
Momentary power failure has occurred
None
Power off
Power is off
None
Startup error
Error occurred during initialization after
power supply turns ON
Replace the hardware
SPU error
Sequence CPU error
Replace the hardware
Memory error
Memory error
Replace the hardware
Battery error
Battery error
Replace the CPU
Scan timeout
Exceeded the scan timer monitoring
period
Modify the program
Invalid instruction found
An invalid instruction is detected
Replace the hardware
FA link (1-8) error
FA link setting is incorrect
Correct the FA link setting
Program error
Program is incorrect
Replace the hardware
Instruction error
Error occurred during instruction
execution
Modify the program
Subroutine error
Subroutine mapping error
Modify the program
Interrupt error
• Interrupt instruction return destination
does not exist
• Interrupt wait exceeded 8
Modify the program
I/O comparison error
• I/O module installation status and
program mismatch
• Using READ/WRITE on DIO
• Using HRD/HWR instruction on DIO
Modify the program
Macro instruction error
Marco instruction return destination does
not exist
Modify the program.
Inter-CPU communication error
Hardware failure
Replace the hardware
ROM cassette error
ROM cassette error
Replace the ROM cassette
I/O error
Cannot read/write to I/O module
Replace the hardware
Sub-unit transmitter error
Cannot read/write to the module installed
in the sub-unit
• Turn ON the sub-unit power
supply
• Check the optical FA bus or the
optical FA bus 2 cables
Sub-unit transmitter switching
occurred
Transmitter cable breakage in loop-
connected remote I/O system
• Replace the optical FA bus or
the optical FA bus 2 cables