Mitsubishi Electric MELSEC iQ-R-R04CPU - Continuous RUN Prevention in TEST MODE; Measuring the Continuous RUN Time in TEST MODE; Setting Method; Checking the Continuous RUN Time in TEST MODE

33 FUNCTIONS
33.2 Continuous RUN Prevention in TEST MODE
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33.2 Continuous RUN Prevention in TEST MODE
This function prevents the Safety CPU from running continuously for a long time in TEST MODE. When the continuous RUN
time has exceeded the allowed time, a continuation error occurs.
Measuring the continuous RUN time in TEST MODE
When the Safety CPU enters RUN state in TEST MODE, measurement of RUN time starts. When any of the following
operations is performed, the Safety CPU stops the measurement and clears the measured value.
• The operating status of the Safety CPU is changed to STOP or PAUSE.
• The Safety CPU is powered off or is reset.
• The mode is changed to SAFETY MODE.
• An error is cleared.
Setting method
Set the continuous RUN allowed time in TEST MODE.
[CPU Parameter]  [RAS Setting]  [RnSFCPU Operation Mode Setting]
Window
Displayed items
Checking the continuous RUN time in TEST MODE
The continuous RUN time in TEST MODE can be checked at SD1840 and SD1841 (Continuous RUN time in TEST MODE).
( Page 833 List of Special Register Areas)
Also, if the permissible TEST MODE continuous RUN time set in the parameters is exceeded, this can be checked by
ensuring that SM1840 (Allowed time over flag for continuous RUN in TEST MODE) is on. ( Page 803 List of Special Relay
Areas)
Item Description Setting range Default
Continuous RUN
prevention setting in
TEST MODE
Use or Not Setting Select whether to use the function or not. • Use
•Not Use
Use
Continuation Allowable
Time Setting
Set the continuous RUN allowed time in TEST MODE. 1 to 86400 seconds 10 seconds