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

3-Design
3. Design
This chapter presents system hardware, system software, DFBs, and SCADA design
that can help the user build a time stamping application.
3.1. System hardware design
There are two kinds of time stamping hardware designs, depending on whether the
user chooses the time stamped by module method or the time stamped by program
method.
• Time stamped by module
This solution is designed for a Quantum system to implement the function of time
stamping by ERT module. The clock reference is in DCF77 format, provided by a
GPS receiver. The signal data is automatically time stamped by the ERT.. A 1 ms
time stamp resolution can be obtained in this application.
As shown in Figure 5, the system includes the following parts:
• Modicon Quantum Hot Standby system (140 CPU 671 60) with remote I/O
module
• Time stamping module (140 ERT 854 10)
• NTP client module (140 NOE 771 11)
• GPS (Global Positioning System) receiver, including NTP server unit and
DCF77 unit
Note: NTP server unit provides a clock reference to synchronize the PC time with the
PAC system time.
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