Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 368)

7.3 Problem Classifications
7.3.2 Error Checking Flowchart for MP2000-series Machine Controllers
7-5
T
roubleshooting
7
7.3.2 Error Checking Flowchart for MP2000-series Machine Controllers
Use the following flowchart to troubleshoot problems based on the indicators and system registers.
Operation error
I/O error
Battery alarm
Refer to 7.4.1 Operation Errors.
Refer to 7.4.2 I/O Errors.
Replace the Battery.
Watchdog timer error
Module synchronization error
System error
Hardware failure
Refer to 7.4.3 Watchdog Timer
Errors.
Refer to 7.4.4 Modules
Synchronization Errors.
Refer to 7.4.5 System Errors.
BAT indicator lit.
SB000418 = ON
(User Operation Error)
SB000419 = ON
(I/O Error)
0001 hex
(Watchdog Timer Error)
0051 hex
(Module
Synchronization
Error)
Any other value
ALM indicator lit.
ERR indicator lit.
Hardware failure
ERR indicator
flashing.
ALM and ERR
indicators flashing.
Indicator and
System Register
Check
Check SW00041.
(CPU Error Status)
Check SW00050.
(32-bit Error Code)
SB000487 = ON
(Battery Alarm)
SB000402 = ON
(Alarm)
SB000403 = ON*
(Error)
SB000403 = ON*
(Error)
SB000403 = ON*
(Error)
*If a hardware failure occurs, the problem may
not be reported in the system registers.
Errors
Alarms
If clearing memory and turning
the power supply OFF and ON
again does not eliminate the
problem, there may be a
hardware failure. Consult with
your Yaskawa representative.
If clearing memory and turning
the power supply OFF and ON
again does not eliminate the
problem, there may be a
hardware failure. Consult with
your Yaskawa representative.