1 Welcome to Advanced PC Configuration

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

The module used in a PC station in this mode is not included in the STEP 7

mode)

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).

 

 

20

Commissioning PC Stations - Manual and Quick Start

Release 5/2005

C79000-G8976-C156-07

Page 20
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Siemens C79000-G8976-C156-07 quick start Mixed operation is possible, Characteristics of the Selectable Modes