Siemens Simovert Masterdrives Compendium page 340

Communication / PROFIBUS
CBP2 - Free
configuration
CBP2, V2.21 and
later, standard
telegrams
8.2.2.2 Acyclical data transfer
Extended
DP functions
8.2-10
Extended functionality of the CBP2 in a SIMATIC STEP7 environment
with DriveES:
In addition to the five types of PPO, free configuration of the cyclical data
is possible.
Up to 16 process data words can be configured, even with a different
number of setpoints and actual values. The consistency ranges can be
flexibly adjusted.
A parameter area (PKW) can be configured irrespective of the number of
process data items.
On version V2.21 and later of the CBP2, cyclic data transmission is
implemented via standard telegrams in accordance with PROFIdrive
profile, version 3.
The CBP2 supports standard telegrams 1 to 6 (cf. Section 8.2.7.3
"Process data interconnection via standard tele").
The PROFIBUS-DP has now been improved to include other methods of
data transfer. In addition to cyclical data transfer, the extended
PROFIBUS-DP enables the following forms of data transfer as defined in
PROFIBUS guidelines No. 2.081 (German) or 2.082 (English):
♦ Acyclical data transfer at the same time as cyclical data transfer
♦ Alarm processing
Acyclical data transfer enables:
♦ the exchange of larger amounts of useful data up to 206 bytes
♦ a reduction in the number of peripheral addresses in the SIMATIC by
means of relocating the PKW area from cyclical to first acyclical data
transfer
♦ as a result, also reduction of the bus cycle time due to shorter
telegrams in cyclical data transfer
♦ simultaneous access by Drive ES (PG/PC) for diagnosis and
parameterization by means of the second data transfer
6SE7087-6QX70 (Version AK)
Compendium Motion Control
09.2008
Siemens AG
SIMOVERT MASTERDRIVES