ProSoft Technology PTQ-AFC - Manual (Page 68)

Quick Start PTQ-AFC ♦ Modicon Quantum Platform
User Manual Liquid and Gas Flow Computer for Hydrocarbon Products
Page 68 of 259 ProSoft Technology, Inc.
June 23, 2011
6.5 Setting the Wallclock
After power-up, the module must receive valid wallclock data from the ladder
logic to perform time-scheduled operations and to properly timestamp historical
records. The sample ladder logic automatically writes the wallclock during the
processor’s first scan (using the processor’s date and time information). You
should ensure that the processor contains valid date and time information. If it
does not, the module may not accept the wallclock block.
You can verify the wallclock information using the Meter Monitor section as
shown in the following example:
Refer to the Sample Ladder Logic section for more information on this topic.