RSLogix 5000 Clock Design

I found a way to sync the clock on PC and my PLC. There is a tool you can download that syncs them and it worked great.
 
Just keep in mind very high execution time for LocalDateTime, looks like firmware does some complicated math calculating local time

54909-1.jpg


This is from 1756-RM087
 
Clock design

Rockwell changed the WallClockTime for the newer version of Logix 5000. In order to get the local hours, you must use LocalDateTime in the Attribute Name in the GSV instruction. Otherwise element 3 of the result will be displayed in GMT.
 

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