ProSoft Technology MVI56-AFC - Manual (Page 222)

MVI56-AFC Sample Logic MVI56-AFC ♦ ControlLogix Platform
User Manual Liquid and Gas Flow Computer
Page 222 of 316 ProSoft Technology, Inc.
February 25, 2011
12.3.4 Wallclock
After the module powers up, it will not perform flow calculation until it receives
valid wallclock information from the processor. The sample ladder logic uses the
processor internal clock as the source of the wallclock information.
Configure the processor time and date information:
1 Right-Click on Controller MVI56-AFC folder
2 Click on Properties
3 Select the Date/Time tab
4 Enter a valid date and time information.
After the AFC56.Flags.AFC_Set_Clock bit is toggled, the logic will move the date
and time information from the processor to the MVI56-AFC module.
The AFC56.Flags.AFC_Set_Clock bit is latched in the power up routine, in order
to guarantee that the module will be up and running after power up.
After the ladder logic receives the input block back from the module it unlatches
the AFC56.Flags.AFC_Set_Clock bit.
You may want to periodically synchronize the processor and the module’s
wallclock, especially when the date and time information is received from a
remote station. In this case, further ladder logic is required from you to
periodically toggle the AFC56.Flags.AFC_Set_Clock bit.