&RPPXQLFDWLRQZLWK0,&520$67(5YLD352),%86'3 (GLWLRQ$
PROFIBUS Optional Board Operating instructions
22 6SE6400-5AK00-0BP0
$F\FOLFGDWDWUDQVPLVVLRQ
([WHQGHG352),%86'3IXQFWLRQV'39
The PROFIBUS-DP extensions DPV1 include the definition of an acyclic data
exchange which can take place in parallel to cyclical data transmissions.
Acyclic data transfer mode allows
½ large quantities of useful data (up to 240 bytes) to be exchanged
½ simultaneous accessing by other PROFIBUS masters
(class 2 master, e.g. start-up tool)
½ omission of I/O address in the SIMATIC and reduction of bus cycle time
through relocation of PKW area from the cyclical to the acyclical transmission
channel
&RQYHUVLRQRIH[WHQGHG352),%86'3IXQFWLRQDOLW\
The different masters, or different modes of data exchange, are represented by
appropriate channels in MICROMASTER4:
½ Cyclical data exchange with one class 1 master
Use of DATA-EXCHANGE and PPO types according to PROFIDrive Profile.
½ Acyclical data exchange with the same class 1 master
Use of DPV1 functions READ and WRITE
The content of the transferred data block corresponds in this case to the
structure of the parameter area (PKW) as defined in the USS specification
(with data block 100)
RU
the structure of the acyclical parameter channel according to PROFIDrive
Profile, version 3.0 (with data block 47).
½ Acyclical data exchange using a SIEMENS start-up tool (class 2 master)
The start-up tool can acyclically access parameter and process data in the
converter.
½ Acyclical data exchange with a SIMATIC HMI (second class 2 master)
The SIMATIC HMI can acyclically access parameters in the converter.
½ Instead of a SIEMENS start-up tool or SIMATIC HMI, an external master (class
2 master) as defined in the acyclical parameter channel according to
PROFIDrive Profile version 3.0 (with data block 47) can access the converter.
To Next Page
Loading...
Need help?
General
