Yaskawa MP2300S Basic Module - Manual (Page 322)

9.4 Troubleshooting Details
9.4.5 System Errors
9-11
T
roubleshooting
9.4.5 System Errors
If a system error occurs, one of the following may be the cause.
• Incorrect operation has been executed in the user program
• Incorrect installation environment
• Hardware failure
When using embedded C-language programming, a system error will cause the system to crash with the incorrect
pointer access or incorrect operation using data with a floating point. Refer to the following table for the possible
causes of the errors.
* For details, refer to 10 Precautions in Machine Controller MP2000 Series Embedded C-language Programming
Package Development Guide (manual number: SIEP C880700 25)
If embedded C-language programming or an incorrect operation in C-language was not attempted, a hardware error
may be the cause of the system crash.
The causes of the hardware error can be divided into two types: installation environment and the hardware failures.
For troubleshooting errors caused by the installation environment, refer to 3.2 Basic Module Connections.
If the installation environment is faultless and the same error still occurs after countermeasures were taken, the hard-
ware may be damaged. Contact your Yaskawa representative or nearest office listed in the back cover for assistance.
ERR LED
No. of flashes
Error Cause Countermeasure
Three times
Address error (read)
exception Data of 16-bit words or 32-bit long words were read
from an incorrect address.
*
Check if the incorrect opera-
tions on the left have been
executed and if so, make cor-
rections.
Four times
Address error (write)
exception Data of 16-bit words or 32-bit long words were written
on an incorrect address.
*
Five times FPU exception
Incorrect operation (non-numeric operation, division
by zero, or overflow) using a floating point was exe-
cuted.