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Overview of PROFIBUS DP
2.9
Control Frames to One or More Slaves
Purpose of Control Frames
A control frame is a frame that the master sends to one slave, a group, several
groups or to all slaves. These frames are not acknowledged by the slaves.
Control frames are used to transfer control commands (known as global control
commands) to the selected slaves to allow synchronization. A control command
contains three components:
Identifier indicating whether one or more DP slaves are being addressed
Identification of the slave group
Control command
Creating Groups
During configuration, you can assign a group identifier to a slave; in other words,it
is possible to include several slaves in one group.
Which slaves belong to a group is specified when you create the database. During
this phase, each DP slave can be assigned a group number. The DP slave is
informed of this group number during the parameter assignment phase. You can
specify a maximum of eight groups.
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DP Base Programming Interface for CP 5613/CP 5614
C79000-G8976-C108-02
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