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APC UPS control system manual Netserver on

Models: UPS control system

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Q:When using USB, I get the following log messages: usb-uhci.c: inter- rupt, status 3, frame# 826. What does it mean?

A:It means one transfer worked (bit 0 in status) and another one (after that) failed (bit 1) at time frame 826. This kind of soft error is common on USB and if everything seems to be working, you can ignore it.

Q:apcnisd doesn’t work. It always gives: FATAL ERROR in apcipc.c at line 497. attach shmarea: shared memory version mismatch (or UPS not yet ready to report)

A:Unfortunately apcnisd does not work with pthreads enabled. You have the following options:

1.If you build with pthreads enabled, apcnisd will not work no matter what you do.

2.If you build with pthreads enabled, and you want to have net- work information from apcupsd, you must set NETSERVER ON. This is the configuration we recommend (i.e. using pthreads and

NETSERVER ON).

3.If you build with pthreads disabled, you have the choice of using apcnisd or the NETSERVER code. If you wish to use apcnisd, you must set NETSERVER OFF

4.If you build with pthreads disabled, and you do not use apcnisd, you must set NETSERVER ON if you wish to have network in- formation from apcupsd.

Concerning the names one sees with “ps”.

1.With pthreads enabled, on Linux machines, you will see multiple copies of apcupsd running, but they will all be called apcupsd rather than apcmain, apcser, ... They will still run as LWP, but we are unable to set the names on threads (LWP). Note, though ps shows “multiple copies” of apcupsd running, it is really one memory image but with multiple threads.

2.With pthreads disabled, we are able to set the child process names (at least on Linux) so you will see apcmain, apcser, apcnis, ... in the ps output. In this case, they are really different processes each with its own memory image (the code image is most likely shared).

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APC UPS control system manual Netserver on
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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.