Enabling time synchronization

Time synchronization is crucial for:

• Event clustering (the same event seen by different devices is only counted once).
• Correctly associating the process impact alarms with power quality events.

The standard synchronization between the Power Monitoring Expert server and devices is adequate for enabling Power Quality Performance features.

• For Modbus devices, time synchronization through Modbus is activated by default.
• For all ION protocol devices (e.g. ION7650, PM8000, etc.), the application engineer needs to enable this feature.

NOTE: High accuracy of time synchronization (such as IRIG-B, etc.), can be used to address user requirements, but it is not required for Power Quality Performance.

To enable Power Monitoring Expert time synchronization on an ION device:

1. Connect to the device using ION Setup. On the Timezone tab for Clock, change entry for the CL1 Time Sync Source to ETHERNET - ION. You can also do this on the meter front panel.

   

2. In Management Console:
   1. For an Ethernet device, set the Time Synch Ethernet Enabled to Yes in the Ethernet Device Configuration.

      

   2. For a serial device, set the Time Synch ION Enabled to Yes in the Ethernet Gateway Site Configuration.