Multi-Tech Systems 7600 Meter Clock Configuration, Number of seconds since 000000 UTC on Jan 1

Meter Clock ConfigurationION 7500 / ION 7600 User’s Guide

Meter Clock Configuration

The Clock module controls the meter’s internal clock, which provides timestamps for data logged by the device. The clock needs to be configured properly to ensure that logged data has accurate timestamp information. The Clock module also receives the time synchronization signals sent to it by the workstation running ION software, updating the device’s clock when required.

The Clock module’s Clock Source setup register defines how the meter’s internal clock auto-corrects drift from its internally calculated time. A separate time source (such as a GPS receiver, or a DNP Master) can be used to synchronize the clock through a communications channel. By default, the clock is set to synchronize from the line frequency.

The setup registers in the Clock module specify timezone and Daylight Savings

Time (DST) parameters and time synchronization functions.

Setup Register	Function	Default
TZ Offset	Sets the timezone the device is in, relative to Greenwich Mean Time.	0
DST Start 1 …	The date and time when DST begins for 20 separate years.	Refer to the ION Device Templates
DST Start 20
		at www.pwrm.com for the DST Start
DST End …	The date and time when DST ends for 20 separate years.	and DST End defaults for the twenty
		separate years.
DST End 20
DST Offset	The amount of time the clock is changed when DST begins or ends.	3, 600 seconds
Time Sync Source	Specifies the communications port that receives time sync signals.	COM1
Time Sync Type	Specifies the type of time sync signal (Local or Universal time).	UTC
Clock Source	Specifies the clock’s time synchronization signal source (line frequency,	Line Frequency
	communications signals, or internal crystal).
	TIP
	When modifying setup registers of the Clock module in Designer, use the Format option to convert
	between UNIX and conventional time. Refer to the description of the Clock module in the online ION
	Programmer’s Reference for more details.
	Typically, the DST Start and DST End registers do not have to be reconfigured. The
	factory defaults are the DST start and end dates for 20 years, in UNIX time (the
	number of seconds since 00:00:00 UTC on Jan 1, 1970).
	Refer to the technical note Time Synchronization and Timekeeping for further details
	on using the meter’s time synchronization functions.

Page 62 Chapter 3 - Default Meter Functionality