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A.2
RAS Feature
A.2.1 PL's RAS Features
RAS, which stands for Reliability, Availability and Serviceability, is a device-level
monitoring function that provides a variety of features to improve the reliability of
your PL system.
Though the standard set of RAS features used will vary depending on the devices
used, the following features are used to provide Alarm Monitoring and External
Input Signal support.
Alarm Monitoring
External Input Signal
Also, when either the one of the above mentioned alarms occurs, or an external
signal input is received, the following types of alarm processing output signals and
features are supported.
External Output Signal
Types of Processing (all
units)
Furthermore, using the PL's System Monitor feature (included in the PL's software
utility disk), allows the easy setting and control (Enable/Disable) of the aforemen-
tioned Alarm Monitor and External Input Signals.
Last, the system monitor feature's use of an Application Link Library (API-DLL)
allows it to also be used with other applications.
*1 When a Mirror Disk Alarm occurs and the standard RAS feature settings are used, the
alarm output is limited to the Mirror Disk unit's LED indicator. (Alternately flashing orange
and green)
*2 The remote reset feature's input can be either enabled or disabled, the alarm output setting
cannot be set to trigger a forced system reset.
*3 For System Monitor Feature details, refer to the accompanying Driver and Utility disk.
App-4
Power Voltage Alarm
Cooling Fan Alarm
Internal Temperature Alarm
Watchdog Timer Time Up
Mirror Disk Alarm
Standard Signal Input (DIN 2 bit)
Remote Reset Input
Standard Signal Output (DOUT 1 bit)
Alarm Output (1 point)
Lamp Output (1 point)
LED Indicator (3-state display – 1 point)
Pop-up Message Output
Buzzer Output
System Shutdown
Chapter 6 - Setting up Your PL OS
Appendices
PL-B900/B910 Series Users Manual
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