ProSoft Technology PTQ-AFC - Manual (Page 246)

Reference PTQ-AFC ♦ Modicon Quantum Platform
User Manual Liquid and Gas Flow Computer for Hydrocarbon Products
Page 246 of 259 ProSoft Technology, Inc.
June 23, 2011
11.9.17 What is the Wallclock?
The Wallclock is the internal module clock that is used by the module to perform
the applicable calculation. Typically, the Wallclock will be copied from the
processor at every power up operation, otherwise the module will not perform
time-of-day-dependent calculations.
11.9.18 Can I read the Primary (or Virtual) Slave values using the
AFC Manager?
Yes, the Modbus Master interface (Communications / Modbus Master) allows
you to easily read (or write) to any register in both slaves.
11.9.19 When are the archives generated?
There are two types of archives: the daily archives (which are generated once a
day) and the hourly archives (which are generated once a hour). The Site
Configuration dialog box has two parameters that allow you to configure when
the archives will be generated:

End-of-Day minute = the minute of the day when the daily archives will be
written
 End-of-Hour minute = the minute of the hour when the hourly archives will be
written