parameter to 180 seconds or more, depending on how much time your system shutdown requires to umount all the filesystems.

•Change /etc/rc.d/apcupsd script adding the ’—kill-on-powerfail’ to the apcupsd invocation.

•Restart your apcupsd

With this setup your UPS operations should be safe.

Alternate Ways To Run The Network Information Server

apcupsd maintains STATUS and EVENTS data concerning the UPS and its operation. This information can be obtained over the network using either apcnisd or apcupsd’s internal network information server, which is essentially the same code as apcnisd but compiled into apcupsd. Clients on the network make a connection to the information server and send requests for status or events data, which the server then transmits to them.

The

information

served

to the network by this

interface

should

not

be

confused

with

master/slave

mode

that

shares a

UPS

between

two or

more

computers.

That

code

is described in

Configuration Directives for Sharing a UPS of this documentation.

There are three different ways to run the information server depending on your requirements and preferences. It can be run as 1. a standalone pro- gram, 2. a standalone program invoked by the inetd daemon, or 3. as a thread (or child process) of apcupsd (default configuration). We recom- mend option 3 unless you have specific reasons to do otherwise. Option 3 is what is configured in by default.

Running the server as a child of apcupsd

This is probably the simplest way to run the network information server. To do so, you simply make sure the NETSERVER directive in /etc/apcupsd/apcupsd.conf is on, and then stop and restart apcupsd. It will automatically create the server thread (or spawn an additional child process named apcnis) to handle network clients. In the case where pthreads are enabled, a new thread will be created rather than a child process to handle the network information requests. Note, the above modification should not

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APC UPS control system Alternate Ways To Run The Network Information Server, Running the server as a child of apcupsd
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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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