Develop a time stamping application in PlantStruxure? - Schneider ...

1-Introduction
methodology is provided to create a time stamping application. Here is an overview of
this method:
• Selection: In this phase, you will decide the selection criteria and steps that will
guide you to select the most appropriate solution for your application
requirements.
• Design: This phase comprises four main parts:
• System hardware design: how to develop the time stamping system
hardware.
• System software design: how to develop time stamping with Schneider
Electric software.
• Derived Function Block (DFB) design: provide a package of the DFBs for
the time stamping application.
• SCADA design: how to develop Vijeo Citect time stamping genies.
• Configuration: This phase explains how to set up the time stamping application:
• How to set up time clock synchronization with references
• How to set up a time stamping solution by module
• How to set up a time stamping solution by program
• Implementation: This phase explains the programming requirements:
• The PAC part explains how to set up the time stamping sections.
• The SCADA part explains how to set up the Vijeo Citect time stamping
genies and alarms.
• Operation: This phase presents the capabilities of the final SCADA application:
• How to use Vijeo Citect time stamping genies
• How to use the time stamping alarms
1.6. Limitation
The accuracy of timestamps relies on the accuracy of the clock reference. It is also
impacted by the transmission mode. For example, when the CPU RTC gets the time
from the NTP server, the time is delayed by the transmission through the network. A
method must be developed to calculate the delay and adjust the clock reference as
needed. This is not in the scope of this STG. For the Purposes of this guide, we
assume that the time used for time stamping does not suffer any delay.
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