Provided by: nut-server_2.7.4-14ubuntu2_amd64 bug


       nutdrv_atcl_usb - Driver for 'ATCL FOR UPS' equipment


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


       This driver is for UPS hardware which identifies itself as USB idVendor 0001 and idProduct
       0000, and iManufacturer ATCL FOR UPS. Known manufacturers include Kanji and Plexus. The
       UPS interface seems to be a generic USB-to-serial chip, and for hardware manufactured by
       Kanji and Plexus, the microcontroller appears to emulate a traditional contact-closure
       interface. This translates into only three states in ups.status: OL, OB and OB LB (similar
       to genericups(8)), with no other dynamic status values reported. Note that these USB
       identifiers (including the iManufacturer string) have also been seen on devices that are
       supported by the fuji subdriver of nutdrv_qx(8).


       This driver supports the following optional setting:

           In case your iManufacturer (Vendor) string does not exactly match ATCL FOR UPS, you
           may provide an alternate string here. Note that a more likely case is that your device
           is handled by another driver for 0001:0000 devices, such as nutdrv_qx(8).


       The UPS returns the same code for "load power is off" as for "on line power". This
       condition will not be observed if the NUT master is powered by the UPS, but may be an
       issue if the UPS is monitored by a remote system.

       The time between the shutdown command and removal of power seems to be fixed at 30
       seconds. Ensure that the NUT shutdown script is invoked as late as possible in the
       shutdown procedure (in case some services take longer than others to clean up).

       Most contact-closure UPSes will not power down the load if the line power is present. This
       can create a race when using slave upsmon(8) systems. See the upsmon(8) man page for more
       information. The solution to this problem is to upgrade to a smart protocol UPS of some
       kind that allows detection and proper load cycling on command.


       Charles Lepple


   The core driver:

   The generic serial driver:

   The Qx driver:
       nutdrv_qx(8) (fuji subdriver)

   Internet resources:
       The NUT (Network UPS Tools) home page: