User manual

Glossary-2
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
To assign parameters is to pass slave parameters from the master to the slave.
B
Rate at which data are transmitted; specifies the number of bits transmitted
per second (baud rate = bit rate).
The bit time (T
Bit
) is the time required to transmit one bit. It is the reciprocal
value of the baud rate: T
Bit
= 1/baud rate
C
Configure means performing the different settings for individual modules in a
Distributed I/O System.
Data which have related contents and must not be separated are known as
consistent data.
The data of an ASi slave must always be treated consistently, the data must
not be corrupted by being read out at different times.
A DP master can send commands simultaneously to a DP slave, a group of
DP slaves or to all DP slaves to synchronize the DP slave stations.
By means of the ³ FREEZE and ³ SYNC control commands, it is possible
to synchronize DP slave stations by event driving.
D
Diagnostics comprises detection, isolation, classification, display and the
ongoing evaluation of errors, malfunctions and messages.
Diagnostics features monitoring functions which run automatically during
system operation. In this way higher availability of the system is achieved as
a result of shorter commissioning times and down times.
Within the distributed I/O, there are various diagnostic possibilities – ranging
from the overview as to which DP Slave has reported a diagnosis to the mon-
itoring of individual inputs and outputs.
Assign parameters
Baud rate
Bit time
Configure
Consistent data
Control command
Diagnostics
Glossary