29: TROUBLESHOOTING
« FC4A MICROSMART USER’S MANUAL » 29-5
0020h: User Program RAM Sum Check Error
The data of the user program compile area in the MicroSmart CPU module RAM is broken.When this error occurs, the
user program is recompiled automatically, and the timer/counter preset values and expansion data register preset values are
initialized to the values of the user program. Note that changed preset values are cleared and that the original values are
restored. Clear the error code using the HMI module or WindLDR on a computer.
0040h: Keep Data Error
This error indicates that the data designated to be maintained during power failure is broken because of memory backup
failure. Note that the “keep” data of internal relays and shift registers are cleared. Data of counters and data registers are
also cleared. Clear the error code using the HMI module or WindLDR on a computer.
If this error occurs in a short period of power interruption after the battery has been charged as specified, the battery is
defective and the CPU module has to be replaced.
0080h: User Program Syntax Error
This error indicates that the user program has a syntax error. Correct the user program, and download the corrected user
program to the MicroSmart. The error code is cleared when a correct user program is transferred.
0100h: User Program Writing Error
This error indicates a failure of writing into the MicroSmart CPU module EEPROM when downloading a user program.
The error code is cleared when writing into the EEPROM is completed successfully. If this error occurs frequently, the
MicroSmart CPU module has to be replaced.
When a memory cartridge is installed on the CPU module, writing into the memory cartridge is checked.
0200h: CPU Module Error
This error is issued when the EEPROM is not found. When this error occurred, turn power off and on. Clear the error code
using the HMI module or WindLDR on a computer. If this error occurs frequently, the MicroSmart CPU module has to be
replaced.
0400h: Clock IC Error
This error indicates that the real time calendar/clock in the clock cartridge has lost clock backup data or has an error
caused by invalid clock data.
Clear the error code and set the calendar/clock data using the HMI module or WindLDR on a computer. The clock cartridge
will recover from the error. If the error continues, the clock cartridge has to be replaced. See Troubleshooting Diagram on
page 29-21.
2000h: I/O Bus Initialize Error
This error indicates that an I/O module has a fault. If this error occurs frequently or normal I/O function is not restored
automatically, the I/O module has to be replaced.
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