GENERICUPS(8)               Network UPS Tools (NUT)              GENERICUPS(8)


       genericups - Driver for contact-closure UPS equipment


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


       This driver supports hardware from many different manufacturers  as  it
       only  uses  the  very  simplest  of signaling schemes.  Contact closure
       refers to a kind of interface where basic high/low signals are provided
       to  indicate  status.   This kind of UPS can only report line power and
       battery status.

       This means that you will only get the essentials in ups.status: OL, OB,
       and LB.  Anything else requires a smarter UPS.


       Cabling  is  different  for every kind of UPS.  See the table below for
       information on what is known to work with a given UPS type.


       This driver supports the following settings in the ups.conf(5):


              Required.  Configures the driver for a  specific  kind  of  UPS.
              See  the  UPS  Types section below for more information on which
              entries are available.


              Optional.  The very nature of a  generic  UPS  driver  sometimes
              means  that  the  stock manufacturer data has no relation to the
              actual hardware that is attached.  With the mfr setting, you can
              change  the value that is seen by clients that monitor this UPS.


              Optional.  This is like mfr above, but it  overrides  the  model
              string instead.


              Optional.   This  is  like  mfr above and intended to record the
              identification string of the UPS. It is  titled  serial  because
              usually this string is referred to as the serial number.


              Optional.   The  driver  will  sleep for this many seconds after
              setting the shutdown signal.  This is necessary for  some  hard-
              ware  which  requires a sustained level to activate the shutdown

              The default behavior of the driver is to exit  immediately.   If
              this  doesn’t  reliably trigger a shutdown in your UPS hardware,
              use this setting to give it more time to react.

              Note: very large values for sdtime may create warnings from ups-
              drvctl if it gets tired of waiting for the driver to return.


       You  may override the values for CP, OL, LB, and SD by defining them in
       the ups.conf after the upstype setting.

       For example, to set the cable power to DTR and the low battery value to
       DCD, it would look like this:

            CP = DTR

            LB = DCD

       Recognized  values  for  input lines are CTS, DCD, and RNG.  Recognized
       values for output lines are DTR, RTS, and ST.  See below for more about
       what these signals mean.

       These values may be negated for active low signals.  That is, "LB=-DCD"
       recognizes a low battery condition when DCD is not held high.


       The connection  between  the  UPS  and  the  computer  is  usually  not
       detectable by the driver due the simple mode of communication.  In some
       cases, the UPS or driver has the ability to loop back a signal from the
       PC.   If  your hardware supports this feature, you can enable it in the
       driver by defining "CON" in ups.conf.  This works just like the options
       in the custom configurations section.

       If your UPS/cable presents a signal on DCD when everything is connected
       properly, you’d use this setting:

            CON = DCD

       When this feature is enabled, the driver will report errors in the sys-
       log  if  the  signal is not present.  This will also be visible in upsd
       and to clients as stale data.


       The essence of a UPS definition in this  driver  is  how  it  uses  the
       serial  lines that are available.  These are the abbreviations you will
       see below:

            OL - On line (no power failure) (opposite of OB - on battery)

            LB - Low battery

            SD - Shutdown load

            CP - Cable power (must be present for cable to have valid reading)

            CTS - Clear to Send.  Received from the UPS.

            RTS - Ready to Send.  Sent by the PC.

            DCD - Data Carrier Detect.  Received from the UPS.

            RNG - Ring indicate.  Received from the UPS.

            DTR - Data Terminal Ready.  Sent by the PC.

            ST - Send a BREAK on the transmit data line

       A - in front of a signal name (like -RNG) means that the indicated con-
       dition is signaled with an active low signal.  For  example,  [LB=-RNG]
       means the battery is low when the ring indicate line goes low, and that
       the battery is OK when that line is held high.


       0 = UPSonic LAN Saver 600
           [CP=DTR+RTS] [OL=-CTS] [LB=DCD] [SD=DTR]

       1 = APC Back-UPS/Back-UPS Pro/Smart-UPS with 940-0095A/C cable
           [CP=DTR] [OL=-RNG] [LB=DCD] [SD=RTS]

       2 = APC Back-UPS/Back-UPS Pro/Smart-UPS with 940-0020B cable
           [CP=RTS] [OL=-CTS] [LB=DCD] [SD=DTR+RTS]

           Type 2 has also been reported to work with the 940-0020C cable.

       3 = PowerTech Comp1000 with DTR cable power
           [CP=DTR] [OL=CTS] [LB=DCD] [SD=DTR+RTS]

       4 = Generic RUPS Model
           [CP=RTS] [OL=CTS] [LB=-DCD] [SD=-RTS]

       5 = Tripp Lite UPS with Lan2.2 interface (black 73-0844 cable)
           [CP=DTR] [OL=CTS] [LB=-DCD] [SD=DTR+RTS]

       6 = Best Patriot with INT51 cable
           [CP=DTR] [OL=CTS] [LB=-DCD] [SD=RTS]

       7 = CyberPower Power99
           also Upsonic Power Guardian PG-500

           Also Belkin Belkin Home Office
           F6H350-SER, F6H500-SER, F6H650-SER

           [CP=RTS] [OL=CTS] [LB=-DCD] [SD=DTR]

       8 = Nitram Elite 500
           [CP=DTR] [OL=CTS] [LB=-DCD] [SD=???]

       9 = APC Back-UPS/Back-UPS Pro/Smart-UPS with 940-0023A cable
           [CP=none] [OL=-DCD] [LB=CTS] [SD=RTS]

       10 = Victron Lite with crack cable
            [CP=RTS] [OL=CTS] [LB=-DCD] [SD=DTR]

       11 = Powerware 3115
            [CP=DTR] [OL=-CTS] [LB=-DCD] [SD=ST]

       12 = APC Back-UPS Office with 940-0119A cable
            [CP=RTS] [OL=-CTS] [LB=DCD] [SD=DTR]

       13 = RPT Repoteck RPT-800A/RPT-162A
            [CP=DTR+RTS] [OL=DCD] [LB=-CTS] [SD=ST]

       14 = Online P-series
            [CP=DTR] [OL=DCD] [LB=-CTS] [SD=RTS]

       15 = Powerware 5119, 5125
            [CP=DTR] [OL=CTS] [LB=-DCD] [SD=ST]

       16 = Nitram Elite 2002
            [CP=DTR+RTS] [OL=CTS] [LB=-DCD] [SD=???]

       17 = PowerKinetics 9001
            [CP=DTR] [OL=CTS] [LB=DCD] [SD=???]

       18 = TrippLite Omni 450LAN with Martin’s cabling
            [CP=DTR] [OL=CTS] [LB=DCD] [SD=none]


       19 = Fideltronic Ares Series
            [CP=DTR] [OL=CTS] [LB=-DCD] [SD=RTS]

       20 = Powerware 5119 RM
            [CP=DTR] [OL=-CTS] [LB=DCD] [SD=ST]


       21 = Generic RUPS 2000 (Megatec M2501 cable)
            [CP=RTS] [OL=CTS] [LB=-DCD] [SD=RTS+DTR]



       Many different UPS companies make models with similar interfaces.   The
       RUPS  cable seems to be especially popular in the "power strip" variety
       of UPS found in office supply stores.  If your UPS works with an  entry
       in  the  table  above,  but the model or manufacturer information don’t
       match, don’t despair.  You can fix that easily by  using  the  mfr  and
       model variables documented above in your ups.conf(5).


       If  your  UPS  isn’t  listed  above, you can try going through the list
       until you find one that works.  There is a lot of cable  and  interface
       reuse in the UPS world, and you may find a match.

       To  do this, first make sure nothing important is plugged into the out-
       lets on the UPS, as you may inadvertently switch  it  off.   Definitely
       make  sure that the computer you’re using is not plugged into that UPS.
       Plug in something small like a lamp so you know  when  power  is  being
       supplied to the outlets.

       Now, you can either attempt to make an educated guess based on the doc-
       umentation your manufacturer has provided (if any), or just start going
       down the list.

       Step 1

       Pick a driver to try from the list (genericups -h) and go to step 2.

       Step 2

       Start the driver with the type you want to try -

               genericups -x upstype=n /dev/port

       Let  upsd  sync up (watch the syslog), and then run upsc to see what it
       found.  If the STATUS is right (should be OL for on line), go  to  step
       3, otherwise go back to step 1.

       Step 3

       Disconnect  the  UPS from the wall/mains power.  This is easiest if you
       have a switched outlet in between it and the wall,  but  you  can  also
       just  pull  the plug to test.  The lamp should stay lit, and the status
       should switch to "OB".  If the lamp went out or the status didn’t go to
       "OB"  within  about  15  seconds, go to step 1.  Otherwise, continue to
       step 4.

       Step 4

       At this point, we know that OL and OB work.   If  nothing  else  beyond
       this point works, you at least know what your OL/OB value should be.

       Wait  for  the UPS to start complaining about a low battery.  Depending
       on the size of your UPS battery and the lamp’s bulb,  this  could  take
       awhile.   It should start complaining audibly at some point.  When this
       happens, STATUS should show "OB LB" within 15 seconds.  If not,  go  to
       step 1, otherwise continue to step 5.

       Step 5

       So far: OL works, OB works, and LB works.

       With  the UPS running on battery, run the genericups driver with the -k
       switch to shut it down.

               genericups -x upstype=n -k /dev/port

       If the UPS turns off the lamp, you’re done.  At this  point,  you  have
       verified  that  the shutdown sequence actually does what you want.  You
       can start using the genericups driver with this type number for  normal

       You  should  use your findings to add a section to your ups.conf.  Here
       is a quick example:

                       driver = genericups
                       port = /dev/ttyS0
                       upstype = 1

       Change the port and upstype values to match your system.


       If the above testing sequence fails, you will probably need to create a
       new  entry to support your hardware.  All UPS types are determined from
       the table in the genericups.h file in the source tree.

       On a standard 9 pin serial port, there are 6 lines that are used as the
       standard  "high/low" signal levels.  4 of them are incoming (to the PC,
       from the UPS), and the other 2 are outgoing (to the UPS, from the  PC).
       The other 3 are the receive/transmit lines and the ground.

       Be  aware  that many manufacturers remap pins within the cable.  If you
       have any doubts, a quick check with a multimeter should confirm whether
       the cable is straight-through or not.  Another thing to keep in mind is
       that some cables have electronics in them to do special  things.   Some
       have resistors and transistors on board to change behavior depending on
       what’s being supplied by the PC.


       These have been contributed by users of this driver.

       The Centralion CL series may power down the load if the  driver  starts
       up with the UPS running on battery as the default line settings contain
       the shutdown sequence.  - Neil Muller

       The Tripp-Lite Internet Office 700 must be used with the black  73-0844
       cable  instead  of the gray 73-0743 cable.  This entry should work with
       any of their models with the Lan 2.2 interface - see the sticker by the
       DB9 connector on the UPS.  - Stephen Brown

       Type  5  should  work  with  the  Tripp-Lite  Lan 2.1 interface and the
       73-0724 cable.  This was tested with the OmniSmart 675 PNP on  Red  Hat
       7.2.  - Q Giese

       Types 7 and 10 should both work with the PhoenixTec A1000.


       There  is  no way to reliably detect a contact-closure UPS.  This means
       the driver will start up happily even if no UPS is detected.   It  also
       means  that  if  the  connection between the UPS and computer is inter-
       rupted, you may not be able to sense this in software.

       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 both of these problems is to upgrade to a smart  proto-
       col  UPS  of some kind that allows detection and proper load cycling on


   The core driver:

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

                                Tue May  4 2004                  GENERICUPS(8)

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