mge-utalk - Driver for MGE UPS SYSTEMS UTalk protocol hardware
This man page only documents the hardware-specific features of the
mge-utalk driver. For information about the core driver, see
mge-utalk supports the following legacy units, using the MGE UTalk
Comet (Utalk Serial Card, ref 66060),
Galaxy (Utalk Serial Card, ref 66060).
This driver also support some newer models with backward UTalk
compatibility, such as Pulsar Evolution and Pulsar EXtreme C. As these
models also support the SHUT protocol, prefer mge-shut for serial
communication, or use the USB port, if available, with the usbhid-ups
This driver supports the following optional settings in the
Low battery level below which LB is raised, in % (default 30%)
Set delay before startup, in minutes (default 1 minute)
Delay before shutdown, in seconds (default 120 seconds)
oldmac Set this flag if you are running Linux on an Oldworld Macintosh
box (all beige Apple Macintosh). This might also be needed for
other OSs (like *BSD) running on PowerMac.
Not all MGE UPS models provide all possible information, settings and
commands. mge-utalk checks on startup which variables and commands are
available from the UPS, and re-reads these regularly. Thus, startup is
a bit slow, but this should not matter much.
mge-utalk.h defines a struct array that tells the driver how to read
variables from the UPS and publish them as NUT data.
"ups.status" variable is not included in this array, since it contains
information that requires several calls to the UPS and more advanced
analysis of the reponses. The function get_ups_status does this job.
Note that MGE enumerates the status "bits" from right to left, i.e., if
buf contains the reponse to command "Ss" (read system status), then
buf contains "bit" Ss.1.7 (General alarm), while buf contains
"bit" Ss.1.0 (Load unprotected).
enable_ups_comm() is called before each attempt to read/write data
from/to the UPS to re synchronise the communication.
Repetitive stale status - Loss of communication
Older models, such as ES/ESV ones, might report repetitive "data stale"
errors. This is due to the fact that these models doesn't support too
much polling. To solve this problem, add "pollinterval=20" in ups.conf,
and change the value of MAXAGE to 25 in upsd.conf, and DEADTIME to 25
Sort out OFF/OL issues
OFF is set according to Ls.2.7, but maybe this interpretation is
in conflict with the NUT interpretation of the OFF flag?
Add PowerShare / PowerSave support (selectable plug number for
ON/OFF/REBOOT commands can act either on outlet 1, 2 or main (1
+ 2). This features depends on the UPS model. This would also
allow to support UM-Switch (smart outlet).
Enhance the model name exposure
A table, named Si1_models_names, has been created to format
finelly the UPSs model names, but it is not yet being used.
Arnaud Quette, Hans Ekkehard Plesser, Martin Loyer, Patrick Agrain,
Nicholas Reilly, Dave Abbott, Marek Kralewski
The core driver:
The NUT (Network UPS Tools) home page: http://www.networkupstools.org/
Mon Jan 16 2006 mge-utalk(8)