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megatec

NAME

megatec - Driver for Megatec protocol based UPS equipment

NOTE

This man page only documents the hardware-specific features of the megatec driver. For information about the core driver, see nutupsdrv(8).

SUPPORTED HARDWARE

The megatec driver is known to work with various UPSes from Blazer, Energy Sistem, Fenton Technologies, Mustek and many others. The NUT compatibility table lists all the known supported models. Keep in mind, however, that other models not listed there may also be supported but haven't been tested.

On models with both a serial port (RS-232) and an USB port, only the serial port is supported.

EXTRA ARGUMENTS

mfr=string

Optional. Specify the UPS manufacturer name.

model=string

Optional. Specify the UPS model name.

serial=string

Optional. Specify the UPS serial number.

lowbatt=float

Optional. Low battery level (%). Overrides the hardware default level.

ondelay=int

Optional. Delay before the UPS is turned back on (minutes).

offdelay=int

Optional. Delay before the UPS is turned off (minutes).

battvolts=float:float

Optional. The battery voltage interval (volts).

UPS COMMANDS

This driver supports some extra commands (see upscmd(8)):

beeper.toggle

Toggle the UPS beeper. (Not available on some hardware.)

load.on

Turn on the load immediately.

load.off

Turn off the load immediately.

reset.input.minmax

Reset minimum and maximum input voltage status.

reset.watchdog

Restarts the UPS watchdog timeout. The watchdog is started if it isn't running, which means the UPS shuts down one minute after this command is executed for the last time, restarting one minute afterwards. To cancel the watchdog, run the "shutdown.stop" command.

shutdown.return

Turn off the load and return when power is back.

shutdown.stayoff

Turn off the load and remain off.

shutdown.stop

Stop a shutdown in progress.

test.battery.start.deep

Perform a long battery test (Not available on some hardware.)

test.battery.start

Perform a (10 second) battery test.

test.battery.stop

Stop a running battery test. (Not available on some hardware.)

USER VARIABLES

The behavior of the driver can be controlled by some user definable variables (see upsrw(8)):

ups.delay.shutdown

Interval to wait after shutdown with delay command (seconds)

ups.delay.start

Interval to wait before (re)starting the load (seconds)

KNOWN PROBLEMS

The battery charge (%) value is only a best-effort calculation and may be incorrect, or non-existant, for some UPS models. In any case, you can always resort to finding the voltages at which the battery becomes fully discharged and fully charged, and specify them manually using the "battvolts" option. If you do this, please notify the author of this driver.

Some UPS commands aren't supported by all models. In most cases, the driver will send a message to the system log when the user tries to execute an unsupported command. Unfortunately, some models don't even provide a way for the driver to check for this, so the unsupported commands will silently fail.

Some models report a bogus value for the beeper status (will always be "enabled" or "disabled"). So, the "beeper.toggle" command may appear to have no effect in the status reported by the driver when, in fact, it is working fine.

The temperature value is also known to be bogus in some models.

AUTHOR

Carlos Rodrigues <carlos.efr at mail.telepac.pt>

SEE ALSO

nutupsdrv(8), upsc(8), upscmd(8), upsrw(8)

Internet resources:

The NUT (Network UPS Tools) home page: http://www.networkupstools.org/