User's Guide

commandMode
r/w
Defines how commands defined by the sdiCommand attribute will be
issued to output tags (default 2). Following modes are defined:
0 – no commands, tag is disabled.
1 – not used.
2 – commands will be sent in automatic mode, defined by the
commandSchedule attribute.
This attribute is valid for SDI-12 actuators only.
commandSchedule
r/w
Defines the schedule to send commands defined by the sdiCommand
attribute to an output tag. It uses a cron syntax, ex: 0 1-5 means that
the command will be sent between one and 5 AM, every hour at
minute 0. A complete cron string may specify minutes, hours, days,
months and the day of the week. The smallest unit is therefore one
minute. For additional details on configuring cron, consult the unix
man pages for crontab (5) (https://man.openbsd.org/crontab.5). This
attribute is valid for SDI-12 actuators only.
conversionParams
r/w
A string representing a first or second degree polynomial that is used
by the RTU to convert the input value; the converted value will be
stored in the internal memory. This feature can be used to convert e.g.
Fahrenheit degrees to Celsius, or vice-versa. As an example, the
formula Celsius = 0,5555*Fahrenheit - 17,7778 (generic: y = a*x + b)
translates to the string 0.5555 -17.7777. For second degree
polynomials, three parameters are required, and their order is always
from left to right (ex.: a, or a b, or a b c). This attribute is valid for Davis
loggers only.
dashValue
r/w
Value returned by the Davis WeatherLink that represents an invalid tag
value. When a tag returns a value equal to the dashValue attribute, a
status 1 (missing data) is generated for this value. This attribute is valid
for Davis loggers only.
davisIndex
r/w
Defines the position of the tag’s value in the string returned by a
DMPAFT command. The davisIndex starts with 0, for the first position in
the string. This attribute is valid for Davis loggers only.
davisSize
r/w
Defines the value’s length (in bytes) in the string returned by the
DMPAFT command. This attribute is valid for Davis loggers only.
lastValue
r
The last value returned by the tag. On the server this attribute does
not exist, its values are stored in the historians.
putdataDate
r
The date of the sensor’s last values pushed unto the server (M2M
Gateway). Normally the equivalent RTU or sensor attribute is used,
unless a tag has a different schedule, or if the data flow to the server
was interrupted. This is an RTU internal attribute, it does not exist on
the server.
Attribute
Type
Description
40