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

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2-Selection Figure 3 Time stamping methods and modes • Time stamped by module is a time stamping method using a Quantum expert time stamped module – 140 ERT 854 10. With this method, the ERT mode is used. In ERT mode, the events are stamped by the ERT clock in the ERT module and sent to the PAC during system scan. The PAC only needs to reformat the time stamps for the SCADA system. • Time stamped by program is a time stamping method performed by the application program. With this method, two modes of time synchronization can be used: • RTC mode, the time stamps are made with the CPU Real Time Clock. The RTC is updated by PC time or NTP server time. The input signal is obtained by a discrete or expert input module. The PAC system combines the RTC and input data to produce the timestamped data in a format that can be accepted by the SCADA system. • NTP mode, the time stamps are made with the NTP server clock. The input signal is obtained by a discrete or expert input module. The PAC system combines the NTP server clock and input data to produce time stamped data in a format that can be accepted by the SCADA system. 2.2.2. Select PAC platform There are three PAC platforms that can be selected: Quantum, Premium and M340; however, only the Quantum CPU supports the ERT module. Thus, the time stamped by module method can only be implemented on a Quantum system. 16
2-Selection 2.2.3. Select I/O architecture Three I/O architectures can be selected: local I/O, remote I/O and distributed I/O. Systems with local I/O can achieve high resolution time stamps. For remote I/O and distributed I/O, the time stamp resolution is limited by the PAC MAST task scan cycle. I/O architecture depends on the PAC platform. The following table shows the I/O architectures for different PAC platforms. Table 2 Supported I/O architecture on each PAC platform Note: The local I/O architecture is not fully supported by Quantum hot standby. 2.2.4. Select CPU task mode 2.3. Solution list Three task modes can be selected: MAST, FAST and EVENT task modes. Only the local I/O architecture supports the FAST and EVENT tasks. If users select the remote I/O or distributed I/O, then the FAST task and EVENT task modes are not available, and the time stamp resolution is lower. Note: 1. The EVENT task is only supported by the Quantum platform. The expert module reference is 140 HLI 340 00. 2. Task mode is not considered in the time stamped by module method. In this case, the time stamping is dealt with in module and not in program. The task mode is only available in the program, not the module. According to the selection procedure, a number of solutions using Schneider Electric’s PlantStruxure products are provided to help the user make a decision based on the application requirements. The following list presents the most representative solutions for time stamping applications. 17
Page 1: How can I … Develop a time stampi
Page 4 and 5: The STG Collection System Technical
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Page 8 and 9: 1-Introduction 8
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Page 38 and 39: 3-Design For example, the TimeStamp
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