Project Settings and Definitions
Archiving
By default, process values acquired and evaluated in the HMI device receive their time stamp at the time of their acquisition in the visualization system.
Logging cycles are defined for cyclic logging of the process values. The time stamp that is assigned when the process values are acquired contains the inaccuracy of the configured logging cycle. Other logging methods are “On change”, “On demand” and “Cyclic selective” triggered by an enable tag.
See also
• Process-driven archiving of process values in WinCC Tag Logging archives,
Online Support under Entry ID 23629327
The specification (URS, FS) of a GMP-compliant plant must describe the way in which time stamping will be performed. The accuracy necessary for alarm and process value acquisition must be checked in detail. The methods of time stamping mentioned above can be used alongside each other. The hardware for the automation and visualization must be selected accordingly.
5.6 Configuration management
The configuration of a computer system consists of various hardware and software components, which can vary in complexity and range from commercially available
standard components to specially customized user components. The current system configuration should be fully available at all times and easy to understand.
For this purpose, the system is divided into configuration elements, which are identifiable with a unique name and a version number and can be distinguished from the previous versions.
Definition of the configuration elements
In most cases, standard hardware components are used, for example PCs, controllers (PLCs), monitors, panels, etc. These are defined and documented by means of type, version number, etc. More work is required when customer-specific
hardware is used, for more on this see chapter 3.1 “Selection and specification of the hardware”.
The standard components for software include, for example, the SIMATIC WinCC
(TIA Portal) system software, the libraries contained therein, other options and
Premium Add-ons.
The application software is configured and programmed on the basis of standard software. The individual configuration elements into which the application software should be split cannot be defined for all cases as it differs depending on various customer requirements and system characteristics.
70
SIMATIC WinCC (TIA Portal) V13 – GMP Engineering Manual
A5E35095213-AA
