
2.Series 15i-A OPERATION B-62924EN/04
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2.1 OVERVIEW
In PROFIBUS-DP communication, two types of nodes are involved: a
master station (also referred to as a DP-Master) and a slave station
(also referred to as a DP-Slave). DI/DO data is exchanged between a
DP-Master and DP-Slave according to a data exchange request from
the DP-Master.
The DP-Master function is referred to as the PROFIBUS-DP Master
(class1) function (simply referred to as the master function). The DP-
Slave function is referred to as the PROFIBUS-DP Slave function
(simply referred to as the slave function).
Two classes of DP-Masters are used in PROFIBUS-DP
communication: class1 and class2. A DP-Master (class1) is a DP-
Master that communicates with DP-Slaves. A DP-Master (class2) is a
DP-Master that serves as the management station within a
PROFIBUS-DP system, and communicates with the DP-Master
(class1).
The master function of FANUC CNCs supports only the DP-Master
(class1) function, so that the FANUC DP-Master cannot be used as a
DP-Master (class2).