App-5
PL-7900 Series User Manual
Appendix
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Alarm Monitoring
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Power Voltage Alarm
Monitors the condition of the PL’s internal and CPU power.
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Cooling Fan Alarm
Monitors the condition of the PL’s internal power and CPU cooling fans.
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Internal Temperature Alarm
Monitors the PL’s internal and CPU vicinity temperatures.
The degree of monitoring (3 levels) and the enabling or disabling of the above
three items is performed via the System Setup Area’s settings.
For detailed information about the monitoring level settings,
5.2.6 SYSTEM MONITOR UTILITY
This utility can also be used to enable or disable the above mentioned features, as
well as designate what type of processing is to be performed.
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Watchdog Timer Time Up
This feature alternately writes Time Up Count values from the CPU to the RAS
feature’s special programmable timer and then periodically clears them, which
provides a means of monitoring the CPU’s performance. If the clearing of this
count value is stopped, the timer will overflow and an alarm will be detected. The
System Monitor utility can be used to enable or disable this feature, as well as
designate what type of processing is to be performed.
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Mirror Disk Alarm
Whenever a disk crash, or other alarm event occurs to the optional Mirror Disk
unit, this unit’s LED indicator will flash (either orange or green) to indicate there
is a problem.
This unit’s error detection occurs independently of and cannot be set by the RAS
feature.
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RAS Feature Details
Summary of Contents for PL-7900 Series
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