Siemens SIMATIC HMI TP 170A Equipment Manual page 13

Operating unit configuration (principles)
Graphics, texts and operating and display elements which need to be represented
on the operating unit must first be created on a configuration computer (PC or PU)
using the configuration software. The configuration computer must be connected to
the operating unit in order to download the project to the operating unit (refer to
"Configuration phase" in Figure 1-1).
Once the project has been successfully downloaded, connect the operating unit to
the PLC. The operating unit can then communicate with the PLC and respond
according to the information configured for running the program in the PLC (refer to
"Process control phase" in Figure 1-1).
Configuration phase
Process control phase
Figure 1-1 Configuration and process control phase
TP 170A Equipment Manual
Release 12/99
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PC/ PU
Create project data
Store project data
Test project
Simulate project
Download project data
Operating unit
TP
OP
Connected to PLC
PLC
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Introduction
1-3