Siemens Commissioning PC Stations C79000-G8976-C156-07 - Manual (Page 20)

1 Welcome to Advanced PC Configuration
20
Commissioning PC Stations - Manual and Quick Start
Release 5/2005
C79000-G8976-C156-07
Mixed operation is possible.
Since you can set the mode for individual communication modules, you can also
use the PC station in mixed operation.
Mixed operation, in this sense, means the use of several communications modules
some in the configured and some in the PG mode.
Depending on the selected mode, the information below applies to the individual
modules of the PC station.
Characteristics of the Selectable Modes
The table below shows the differences between the two selectable modes and how
this affects handling of the PC station during commissioning and operation.
Table 1-1
Mode Characteristics/Advantages when Commissioning and During
Operation
PG operation (default
mode) The module used in a PC station in this mode is not included in the STEP 7
project (it is, however, possible to take this module into account in the bus
parameter calculation using the PG/PC station object).
If your module in the PG or engineering station is configured for this mode,
you must specify the interface on the PG or the engineering station explicitly
with the “Set PG/PC Interface” or Configuration Console tool.
With HMI stations, connections to communication partners are set up for
process control over unconfigured S7 connections.
Configured mode The PC station along with the modules planned in the project engineering is
included in a STEP 7 project so that the communication relations with the
stations can be planned in the project.
This has the following advantages:
S
Very simple commissioning (initial configuration) by using this
configuration.
S
Networking parameters stored in the project are adopted (PROFIBUS).