9.3  Problem Classification
9.3.2  MP2300S Error Check Flowchart
9-5
9.3.2  MP2300S Error Check Flowchart
Use the following to troubleshoot a problem using the LED indicators or the system registers.
Operation error
I/O error
Battery alarm
Watchdog timer timeout
Module synchronization error
System error
Hardware failure
If the problem remains after the 
memory has been cleared and 
the power has been cycled, 
there may be a hardware failure. 
Contact your Yaskawa
representative.
BAT indicator is lit.
SB000418 = ON 
(user operation error)
SB000419 = ON 
(I/O error)
0001H 
(watchdog timer timeout)
0051H 
(module synchronization 
error)
None of the above
ALM indicator lit
ERR indicator lit
Hardware failure
If the problem remains after the 
memory has been cleared and 
the power has been cycled, 
there may be a hardware failure. 
Contact your Yaskawa 
representative.
ERR indicator blinking
ALM and ERR 
indicators blinking
Check the LED 
indicators or 
system registers.
SW00041 
check (CPU 
error status)
SW00050 
check (32-bit 
error code)
SB000487 = ON 
(battery alarm)
SB000402 = ON 
(ALARM)
SB000403 = ON∗ 
(ERROR)
SB000403 = ON∗ 
(ERROR)
SB000403 = ON∗ 
(ERROR)
∗Data may not be reported in the 
  system registers when there is a 
  hardware failure.
<Error>
<Alarm>
Refer to 8.3 Replacing the Basic 
Module Battery.
Refer to 9.4.1 Operation Errors.
Refer to 9.4.2 I/O Errors.
Refer to 9.4.3 Watchdog Timer 
Timeout Errors.
Refer to 9.4.4 Module 
Synchronization Errors (Ver. 
2.75 or Later).
Refer to 9.4.5 System Errors.