Mitsubishi MELSEC-Q Series User Manual page 166

4
FUNCTIONS
Item
System watchdog timer A system watchdog timer error is
error detection detected.
User watchdog timer A user watchdog timer error is
error detection detected.
The battery error of the C Controller
*1
Battery error detection
module is detected.
Momentary stop
A momentary stop is detected.
*2
detection
Module verify The I/O module mounting status is
*1
error detection diagnosed.
The I/O module's fuse condition is
*1
Blown fuse detection
diagnosed.
Control bus error The bus status on the base unit is
detection diagnosed.
Intelligent function An intelligent function module error is
module error detection detected.
Intelligent function
The intelligent function module I/O
module assignment
assignment status is diagnosed.
error detection
4
- 86 4.7 Self-diagnostic Function
Table4.26 Numbers indicated under "Error handling" and descriptions (Continued)
No.
Registration to event history file.
4) Only when an error is detected without the same error being detected, the error is registered to
the event history file.
Table4.27 Self-diagnostic function list
Description
Stop/Continue
Stop/Continue
Stop/Continue
* 1 Can be unchecked in "Error check" on the <<System settings>> tab of the C Controller setting
utility.
* 2 The number of detections can be confirmed by the QBF_ReadStatusEx function.
While the C Controller module is detecting a "Main CPU error", "Momentary stop detection
(including detection count update) and "Power OFF detection" are not executed.
* 3 The CPU operating status at the time of error detection can be changed to "Continue" in the
"Operation mode at the time of error" on the <<System settings>> tab of the C Controller setting
utility.
* 4 The CPU operating status at the time of error detection can be changed to "Continue" in the "H/W
error time CPU operation mode" on the <<I/O assignment settings>> tab of the C Controller
setting utility.
Description
LED status
C Controller
module status
RUN ERR.
Stop Off Flash Constantly
Stop Off Flash Constantly
Continue On On
Continue On Off
Flash/
*3
Off/On
On
Flash/
*3
Off/On
On
Stop Off Flash
Flash/
*4
Off/On
On
Stop Off Flash
Error handling
Diagnostic
timing
1) 2)
Periodically
checked
Constantly --
Periodically
checked
Periodically
checked
At power-on,
at reset,
periodically
checked,
at module access
At power-on,
at reset,
periodically
checked,
at module access,
at interrupt
occurrence
At power-on,
at reset
: Executed -- : Not executed
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3) 4)
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