5 process data channel, P r o c e s s d a t a c h a n n e l – BECKHOFF AX2000 PROFIBUS DP communication profile User Manual
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5
Process data channel
The process data channel is used for real-time communication. This channel is divided into two tele-
gram sections:
PZD1:
Control word (STW) /Status word (ZSW) – instrument control
The control word and the status word are used to control the amplifier and
monitor the amplifier's status.
PZD2-6:
Setpoint / actual values depending on the operating mode.
Setpoints and actual values such as position, velocity and current are exchanged
in this section.
The availability of a process data channel is determined in the PROFIDRIVE drive profile. The data
that can be transferred is defined according to the operating mode (see “Setting the operating mode
s” chapter 4.2.2.7). The process data that are used are determined in such a way that the real-time
capability of this channel is optimally used.
In this chapter the instrument control is described first, and then the functions and details of each
operating mode .
PROFIBUS for AX2000/2500
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BECKHOFF
12/05
Process data channel