hid-ups and USB Specific Information

The UPS has an internal set of timers and remaining capacity counters, which it uses to determine when to shutdown. These are in addition to the apcupsd counters BATTERYLEVEL and MINUTES. As a conse- quence, apcupsd will shutdown on the first limit that triggers (either an apcupsd limit, or a UPS limit). The UPS internal counter equivalent to BATTERYLEVEL can be found in the hid-ups report as RemainingCapac- ityLimit, which is typically factory set to 10 percent. In addition, the Low Battery signal is normally given by the UPS when less than 2 minutes of run time remain.

apcupsd Network Monitoring (CGI) Programs

With this release, there are five CGI programs (multimon.cgi, mul- timoncss.cgi, upsstats.cgi, upsfstats.cgi, and upsimage.cgi). To have them properly installed, you must run the ./configure command with --enable-cgi and you should specify an installation directory with --with-cgi-bin= or load them manually. To install the Cascading Style Sheet, which is used by multimoncss.cgi, you must use the --with-css-dir= option. The default directory for installation of the CGI programs is /etc/apcupsd, which is not really where you want them if you are going to use them. Normally, they should go in the cgi-bin of your Web server.

Once built and loaded, they will give you the status of your UPS or UPSes over the network.

Normally only multimon.cgi or multimoncss.cgiis directly invoked by the user. However, it is possible to directly invoke upsstats.cgi and upsfstats.cgi. upsimage.cgi should never be directly invoked as it is used by upsstats.cgi to produce the bar charts.

Setting up and Testing the CGI Programs

Network Information Server (NIS):

Before using multimon and the other CGI programs, first ensure that apcupsd is configured to run the Network Information Server. This is done by setting NETSERVER on in /etc/apcupsd/apcupsd.conf. This switch is on by default. If you are unsure of its state, see the section at the end of this chapter concerning the Client test program.

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APC UPS control system manual Hid-ups and USB Specific Information, Apcupsd Network Monitoring CGI Programs
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UPS control system specifications

APC UPS (Uninterruptible Power Supply) control systems are vital components for ensuring uninterrupted power supply and protecting critical equipment from power interruptions, surges, or fluctuations. Designed by Schneider Electric, APC UPS systems are renowned for their high quality and reliability. They utilize advanced technologies and features to suit diverse applications, from home offices to large industrial settings.

One of the main features of APC UPS systems is the ability to provide backup power during outages. This is achieved through a battery system that activates immediately when the mains power fails. This seamless transition minimizes downtime and ensures that electronic devices continue to operate, protecting data integrity and equipment lifespan.

Another significant characteristic of APC UPS systems is their intelligent management capabilities. Most models come with PowerChute software, which provides users with real-time monitoring of power conditions and the status of the UPS. This software allows for graceful shutdowns of connected devices during extended outages, thereby preventing data loss and damage to devices.

APC UPS systems also incorporate advanced technologies such as Automatic Voltage Regulation (AVR). AVR technology ensures that the output voltage remains stable by correcting minor fluctuations without switching to battery mode. This not only prolongs the battery life but also provides a consistent power supply to the connected equipment.

Thermal management is another critical aspect of APC UPS control systems. The design often includes efficient cooling systems that prevent overheating, ensuring optimal performance and longevity of the unit. Some models feature EcoMode, which reduces energy consumption and lowers operational costs by working at high efficiency only when battery backup is not required.

APC UPS systems are designed with scalability in mind. Users can easily add more batteries or connect additional UPS units to accommodate growing power needs. Features such as hot-swappable batteries and modular design facilitate easy upgrades and servicing without interrupting power supply.

In terms of connectivity, APC UPS products often feature multiple options including USB, RS-232, and network management capabilities. This enables users to connect remote management tools and integrate the UPS with existing IT infrastructure.

In summary, APC UPS control systems deliver reliability, efficiency, and advanced technology features that cater to a wide array of power protection needs, making them a trusted choice for individuals and businesses alike.
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