<< Click to Display Table of Contents >>   Synchronize Meter's Clock Time

Write-Only

 

 

PLC Tag in Number format to synchronize a meter's clock with computer's local time, with the option to inform a meter's location (timezone) in minutes, referring to GMT, if meter's model has this attribute.

For example, if the meter is located in Brazil, its timezone must be set to GMT -03:00 by typing -180 in this Tag, which is the equivalent value in minutes of the equivalent timezone (GMT -3 = -3 * 60 = -180).

 

Meter's Clock Syncing Properties

This Tag to synchronize a meter's clock time works with the Minimum time adjustment (seconds), Maximum time adjustment (seconds), and Protect against time adjustment across intervals (seconds) parameters, defined in this Driver's properties window.

•Minimum time adjustment (seconds): Defines a minimum adjustment to be performed by this Driver, in seconds. Adjustments less than this time are not performed (this Driver returns success when writing, but does not perform that adjustment)

•Maximum time adjustment (seconds): Defines a maximum adjustment to be performed by this Driver, in seconds. Adjustments greater than this time are reduced to this maximum adjustment

•Protect against time adjustment across intervals (seconds): Defines a value to enable a protection against clock settings that exceed the current collection interval. The indicated value determines the number of seconds that are protected at the end of the current collection interval

 

For example, if the current meter's time is 09:13:35 and the integration period is 15 minutes (900 seconds), this is the scenario for a protected clock adjustment:

•Current collection interval: 09:00:00 to 09:15:00

•Adjustment's protection value: 60 seconds

 

Based on this protection parameter, the maximum allowable clock adjustment is from 09:00:00 to 09:14:00 (09:15:00 minus 60 seconds). Adjustments that exceed these limits are truncated so that they remain within that limit.