IFM Electronic Ecomat Mobile Series System Manual page 292

Glossary of Terms
Template
A template can be filled with content.
Here: A structure of pre-configured software
elements as basis for an application program.
Test rate rt
The test rate r is the frequency of the
t
automatic tests to detect errors in an SRP/CS
in time.
U
UDP
UDP (User Datagram Protocol) is a minimal
connectionless network protocol which belongs
to the transport layer of the internet protocol
family. The task of UDP is to ensure that data
which is transmitted via the internet is passed
to the right application.
At present network variables based on CAN
and UDP are implemented. The values of the
variables are automatically exchanged on the
basis of broadcast messages. In UDP they are
implemented as broadcast messages, in CAN
as PDOs. These services are not confirmed by
the protocol, i.e. it is not checked whether the
message is received. Exchange of network
variables corresponds to a "1 to n connection"
(1 transmitter to n receivers).
Uptime, mean
Mean Time Between Failures (MTBF)
Is the expected value of the operating time
between two consecutive failures of items that
are maintained.
NOTE: For items that are NOT maintained the
mean life →MTTF is the expected value (mean
value) of the distribution of lives.
Use, intended
Use of a product in accordance with the
information provided in the instructions for use.
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ifm System Manual ecomatmobile SmartController (CR2500) V05
W
Watchdog
In general the term watchdog is used for a
component of a system which watches the
function of other components. If a possible
malfunction is detected, this is either signalled
or suitable program branchings are activated.
The signal or branchings serve as a trigger for
other co-operating system components to
solve the problem.
wo
WO = write only
Unidirectional data transmission: Data can only
be changed and not read.