Ras Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.5

RAS Function

Self-diagnostic function
This function diagnoses the remote head module to see whether an error exists or not.
Timing of self-diagnostics
If an error occurs when the remote head module is powered on or while it is in the RUN/STOP state, the remote head module
detects and displays the error. However, depending on the error occurrence status, the remote head module may not be able
to detect an error. Configure safety circuits external to the programmable controller to ensure that the entire system operates
safely even in such a case.
Check method of error
This section describes the check methods when error occurs.
■Using the special relay and special register
If the remote head module detects an error, 'Latest self-diagnostic error' (SM0) and 'Latest self-diagnostic error' (SM1) turns
on, and the error code corresponding to the error definition is stored in 'Latest self-diagnostic error code' (SD0). If multiple
errors are detected, the latest error code is stored in 'Latest self-diagnostic error code' (SD0). Configure interlocking for either
the remote head module or the machine system using 'Latest self-diagnostic error' (SM0), 'Latest self-diagnostic error' (SM1),
and 'Latest self-diagnostic error code' (SD0) on the master station program. Also, a maximum of 16 error codes for the error
definitions of the errors currently occurring will be stored into 'Self-diagnostic error number 1' (SD10) to 'Self-diagnostic error
number 16' (SD25). (The error codes of the 17th error and later are not stored.)
■Using LED
The error occurrence can be checked through the status of the ERR LED. ( MELSEC iQ-R CC-Link IE Field Network
Remote Head Module User's Manual (Startup))
■Using the engineering tool
The error status for the overall system, error or event history currently being generated can be checked in the module
diagnostics. ( GX Works3 Operating Manual)
• Currently occurring errors: Maximum 16 errors (error definition) currently occurring in the remote head module can be
*1
displayed. However, even when an additional error occurs after a moderate or major error, the error information is not
refreshed.
*1 Maximum number of errors can be displayed differs depending on the error type. (Minor error: 15, Moderate error: 1, Major error: 1)
When 15 minor errors are displayed and a new minor error occurs, description of the new error is not displayed. Also, when an error with
the same code has already been displayed, the date and time of occurrence and detailed information of the relevant error are not
updated.
• Error history: Occurred errors are logged in the event history. ( Page 34 RAS Function)
Operation setting at error detection
Configure each operation setting when an error is detected.
■Mode when an error is detected
The operation when an error is detected by self-diagnostics differs depending on the module parameter of the data link or the
connected module. ( Page 22 Output status for each status)
■Error detection setting
Set whether or not to detect errors in "Error Detections Setting" of "RAS Setting" in "CPU Parameter". ( Page 79 RAS
Setting)
1 FUNCTIONS
30
1.5 RAS Function