Table of Contents
Advertisement
4-46
Master Communication
Length of Process Data Channel
Parameter Channel in the Cyclic Channel (Device-Specific)
Length of the Process Data Channel (Real-Time Data
Channel)
Within the cyclic channel, the parameter channel (optional) and the
process data channel, in which the real-time data of the drive controller
are transmitted, are arranged.
The PROFIBUS slave circuit allows flexible configuration of the process
data channel, the length of the process data channel thereby changing
accordingly.
Note:
The length currently effective is contained in the parameters
P-0-4082, Field bus: length of cyclic actual value data
channel and P-0-4071, Field bus: length of cyclic
command value data channel.
The process data channel (real-time data channel) can only have words
or double words, but not bytes, as data types. Length, however, is
specified in bytes for the sake of compatibility with other bus systems.
The length of the process data channel can range between 1...16 words
or 2...32 bytes in either direction.
The length of the process data channel results from the content of the
configuration lists P-0-4080 or P-0-4081 and is contained in the following
parameters:
• P-0-4071, Field bus: length of cyclic comm. value data channel
(master Å slave)
• P-0-4082, Field bus: length of cyclic actual value data channel
(slave Å master)
The setting becomes effective with the initialization of the drive controller
to the operating mode, so it has to be set before.
Note:
Note that a change in the length of the process data channel
also requires a change in the master configuration. The length
of the process data channel that was set has to be in
accordance with the projected length in the master. Otherwise
the error message F4012 Incorrect I/O length.
Since it must be possible to parameterize the drive via the field bus, a
configurable parameter channel was implemented in the cyclic channel of
the IndraDrive the length of which can be set to 0...16 bytes. The
parameter channel consists of a control or status word and up to a
maximum of 7 words for data.
Note:
The parameter channel is always at the beginning of the
cyclical data channel. The length of the parameter channel
can be set in P-0-4083, Field bus: length of parameter
channel.
Structure of the parameter channel:
• control word:
2 bytes
• data:
2 to 14 bytes
MPH-02, MPB-02, MPD-02
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Advertisement
Table of Contents
