Introduction

The BMENOR2200H module supports clock synchronization as an SNTP protocol client.

When the SNTP client is enabled, the module synchronizes the internal clock from the time server. This time is the basis for time stamping RTU events.

NOTE: Refer to the instructions for configuring the network time service in the DTM.

Clock Synchronization and Time Stamps

This sample network shows the flow of the synchronization signal from the perspective of the SNTP client in a BMENOR2200H module:

red line: The BMENOR2200H module sends an SNTP request over ethernet port to the SNTP server.

blue line: The SNTP server sends a reply to the BMENOR2200H module via ethernet port.

green line: The BMENOR2200H module sends the source clock synchronization signal to the controller over X Bus.

NOTE:

  • The BMENOR2200H module sends the signal to update the controller’s internal clock only when you select Update Clock to Controller in the time synchronization parameters. Time signal updating to controller will be stopped automatically when module detects its time quality is invalid.

  • The clock time accuracy of BMENOR2200H module is typically within 5 ms of the SNTP server time, with a worst-case difference of 10 ms and a free running drift time +/- 2.6 seconds per day.

  • Between clock synchronization signals, the BMENOR2200H module updates its own clock every millisecond with its internal timer.