Glossary
Glossary-4
IM 178-4
C79000-G7076-C178-01
Load power supply
Power supply for supplying signal and function modules and the process I/Os
connected to them.
Master
When a master has the token, it is permitted to send data to other nodes and to
request data from other nodes (= active node).
³
DP masters are, for example, the CPU 416-2 DP, the CPU 414-2 DP, the CPU
315-2 DP or the IM 308-C.
Master-slave mechanism
Bus access mechanism with which only one node is the
³
DP master and all
other nodes are
³
DP slaves.
Node
Device that sends, receives or repeats data sent via the bus, for example DP
master, DP slave, RS 485 repeater, active star coupler.
Non-floating
With non-floating input/output modules, the reference potentials of the control
and load circuits are electrically connected.
Parameter assignment
Parameter assignment involves the setting of the behavior of the module.
Parameter assignment master
Each DP slave has one parameter assignment master. During startup, the
parameter assignment master transfers the parameter data to the DP slave. This
master can read and write the DP slave and is also permitted to modify the
configuration of a DP slave.