WinCC V6.2 Getting Started - DCE FEL ČVUT v Praze

The first WinCC Project 07.03
2.4 Tags and Tag Groups
The tags used in WinCC represent either real values - such as the fill level of a
water tank - or internal values that are calculated or simulated within WinCC.
The connecting links for the exchange of data between WinCC and the automation
systems are process tags ("external tags"). Each process tag in WinCC
corresponds to a certain process value in the memory of one of the connected
automation systems. In runtime, WinCC reads the data area in which this process
value is stored from the automation system and thus determines the value of the
process tag. For example, the fill level of a water tank is determined by a fill level
sensor and stored in the PLC. Via a connection - the communication channel - the
value of the fill level is transmitted to WinCC.
Tags not supplied with values by the process are created in the folder "internal
tags".
Tag groups are used to organize tags. All tags can be assigned to tag groups for
improved clarity.
Note
In this project, only internal tags are used. Steps 4a and 4b are not mandatory for
this project. In these steps, the configuration of tag groups and process tags is
shown.
Tag Management Hierarchy with regard to Process Tags
Tag Management
SIMATIC S7 PROTOCOL SUITE
MPI
PLC1
Tag Group
Tag
Tag Management Hierarchy with regard to Internal Tags
Tag Management
Tag Group
Tag
28 Manual WinCC V6.2 Getting Started
6ZB5370-0CM02-0BA5