Cpu Module Operating Status, Output, And Err Led During Errors; Error Causes And Actions - IDEC FC4A-C10R2 User Manual

29: T
ROUBLESHOOTING

CPU Module Operating Status, Output, and ERR LED during Errors

Error Items
Power failure
Watchdog timer error
Data link connection error
User program EEPROM sum check error
TIM/CNT preset value sum check error
User program RAM sum check error
Keep data error
User program syntax error
User program writing error
CPU module error
Clock IC error
I/O bus initialize error
User program execution error
*1: When a program RAM sum check error occurs, operation is stopped momentarily for reloading the user program. After
completing the reloading, operation resumes.
*2: Operation starts to run and outputs are turned on or off according to the user program as default, but it is also possible
to stop operation and turn off outputs using the Function Area Settings on WindLDR. See page 5-3.

Error Causes and Actions

0001h: Power Failure
This error indicates when the power supply is lower than the specified voltage. This error is also recorded when the power
is turned off. Clear the error code using the HMI module or
0002h: Watchdog Timer Error
The watchdog timer monitors the time required for one program cycle (scan time). When the time exceeds approximately
293 msec, the watchdog timer indicates an error. Clear the error code using the HMI module or
this error occurs frequently, the
0004h: Data Link Connection Error
This error indicates that the Function Area Settings for data link communication are incorrect or the cable is not connected
correctly. Make sure that slave stations are set to station numbers 1 through 31 using
numbers is allowed. See page 25-7.
To correct this error, make corrections in the Function Area Settings and download the user program to each station, or
connect the cable correctly. Turn power off and on again for the slave station. Then take one of the following actions:
• Turn power off and on for the master station.
• Initialize data link communication for the master station using
• Turn on special internal relay M8007 (data link communication initialize flag) at the master station. See page 25-6.
0008h: User Program EEPROM Sum Check Error
The user program stored in the
, and clear the error code using the HMI module or
MicroSmart
When a memory cartridge is installed on the CPU module, the user program in the memory cartridge is checked.
0010h: Timer/Counter Preset Value Sum Check Error
The execution data of timer/counter preset values is broken. The timer/counter preset values are initialized to the values of
the user program automatically. Note that changed preset values are cleared and that the original values are restored. Clear
the error code using the HMI module or
29-4
Operating
Status
Stop
Stop
Stop
Stop
Maintained
Stop *1
Maintained/
Stop *2
Stop
Stop
Stop
Maintained
Stop
Maintained
CPU module has to be replaced.
MicroSmart
CPU module EEPROM is broken. Download a correct user program to the
MicroSmart
WindLDR on a computer.
« FC4A M S
ICRO
Output ERR LED
OFF
OFF
OFF
OFF
Maintained
OFF
Maintained/
OFF *2
OFF
OFF
OFF
Maintained
OFF
Maintained
on a computer.
WindLDR
on a computer. See page 25-11.
WindLDR
on a computer.
WindLDR
U ' M »
MART SER S ANUAL
Checked at
OFF Any time
ON Any time
OFF Initializing data link
ON Starting operation
OFF Starting operation
ON During operation
OFF Turning power on
ON Downloading user program
ON Downloading user program
ON Turning power on
ON Any time
ON Turning power on
ON Executing user program
on a computer. If
WindLDR
. No duplication of station
WindLDR