Multi-Tech Systems 7500, 7600 Diagnostics and Event Logging, Diagnostics Module Output Registers

Models: 7500 7600

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ION 7500 / ION 7600 User’s Guide

Diagnostics and Event Logging

 

 

Diagnostics and Event Logging

The meter’s Diagnostics module includes output registers that provide time synchronization diagnostics. Events are logged by the meter’s Clock module, Communications modules, and Diagnostics module in response to time synchronization events.

Diagnostics Module Output Registers

Time Sync Source

This register is ON if the internal clock synchronizes with the line frequency or

GPS, and it is OFF if the internal clock synchronizes with its own internal crystal.

GPS Receiver Status

This register is ON if the GPS receiver is locked onto a time source and OFF if the lock is lost. This information is received directly from the GPS receiver; the register is NOT AVAILABLE if the GPS time synchronization is not used.

Time Sync Count

This register indicates how many time synchronization signals have been received. The value increases with each signal received.

Time Since Last Time Sync

This register displays the amount of time, in seconds, since the last time synchronization signal was received.

Time Sync Diag (time sync diagnostics)

This register displays the difference, in microseconds, between the timestamp in a synchronization signal and the time in the device’s clock when the signal is received. The displayed value is a sliding window average over the last five time synchronization signals received.

Time Sync Status

This register is ON if a time synchronization signal is acquired, and OFF if the signal has been lost. The Diagnostics module calculates the average interval for the last five signals received, considering the signal lost if no signals are received in two times the average interval.

Event Logging

The following events appear in the Event Log:

Time sync acquired — generated when the first time sync signal is received (Diagnostics module’s Time Sync Status register goes ON).

Time sync lost event — generated if no time sync signals are received in two times the average interval of the last five signals (Diagnostics module’s Time Sync Status register goes OFF).

GPS locked — generated when the GPS receiver locks onto a time source (Diagnostics module’s GPS Status register goes ON).

Time Synchronization & Timekeeping Technical Note

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Multi-Tech Systems 7500, 7600 manual Diagnostics and Event Logging, Diagnostics Module Output Registers

7500, 7600 specifications

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