NISPORT <port> This configuration directive specifies the port to be used by the apcupsd Network Information Server. The default is platform dependent, but typically 3551, which we have received from IANA as the official apcupsd networking port. If you change this port, you must manually change the #define SERV TCP PORT in cgi/upsfetch.c and rebuild the CGI programs. An alternative is to use the --with-nis-port= option of the ./configure program during the build. In this case, all the appropriate locations will be automatically changed.

EVENTSFILE <filename> If you want the apcupsd network informa- tion server to provide the last 10 events via the network, you must specify a file where apcupsd will save these events. The default is: /etc/apcupsd/apcupsd.events. Currently, apcupsd will save at most the last 50 events. Periodically (once an hour by default), apcupsd will check the size of this file. When more than 50 events are recorded, apcupsd will truncate the file to the most recent 10 events. Conse- quently this file will not grow indefinitely. Although we do not rec- ommend it, you may change these values by editing apcevents.c and changing the appropriate defines. Be aware that if you set these values to very large numbers, apcupsd may make excessive memory demands on the system during the data access and file truncation operations.

This filename may also be specified at build time by using the --with-log-dir= option of the ./configure program.

Configuration Directives used during Power Failures

In general, none of these directives are required. However, if you have a voltage-signalling (dumb) UPS with a cable that does not support the Low Battery signal, you must set the TIMEOUT directive to force a shutdown. Please see the Cables (see Cables) section of this manual for more details.

ANNOY <time in seconds> Specify the time in seconds between mes- sages requesting logged in users to get off the system during a power failure. This timer starts only when the UPS is running on batteries. The default is 300 seconds (5 minutes). apcupsd sends the annoy mes- sages by invoking the apccontrol script with the annoyme argument. The default is to send a wall message on Unix systems and a popup message in Windows.

The value of ANNOYDELAY must be greater than the value of ANNOY in order to receive annoy messages (this doesn’t make sense,

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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.

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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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