Communication / PROFIBUS 09.2008
6SE7087-6QX70 (Version AK) Siemens AG
8.2-78 Compendium Motion Control SIMOVERT MASTERDRIVES
The behavior of the S7-CPU during complete failure of a configured drive
or during an interruption in the bus cable can be controlled by
programming the relevant system organization modules OB86 and
OB122. If these system modules are not programmed, the S7-CPU also
goes into the STOP state if a configured drive fails or if a bus is
interrupted. Refer to Chapter 3 of the programming manual for the S7-
300/400 for detailed descriptions on the indicated system organization
modules.
After installation of the DVA_S7-OM , the CBP is shown as follows in the
hardware catalog:
The type of PPO is selected in the hardware manager from the register
"Configuration" of the "Characteristics – DP slave" mask which is
automatically shown on the screen when the selection (e.g. Motion
Control) is confirmed.
More information on planning data exchange between a CBP and a
SIMATIC S7 can be found in the description accompanying the DVA_S7
module package.
If the DVA_S7 module package is not used, the system features
regarding data consistency have to be observed by the user program. In
particular, this means that access can only be made via the system
functions SFC14 and SFC15 to all consistent data areas > 4 bytes.
The PKW and the PZD parts are regarded as two independent consistent
data areas.
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