GE PACSystems RX7i

Chapter 9. Diagnostics
450 PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual GFK-2950C
9.6.3 Diagnostic Logic Block (DLB) Example
In this example, a block of LD logic is downloaded to the controller and executed.
The basic steps for using a sample DLB in the controller are as follows:
1) Create an LD block named MonitorScan and place it in the Toolchest. For information on working
with the Toolchest, refer to the online help.
The logic in the DLB block measures Controller scan time. It calculates the Minimum (minTime),
Maximum (maxTime), and Average (avgTime) time between DLB block executions. When the DLB
is set to Sweep Mode, these values should be close to the Controller Sweep time.
Logic for the MonitorScan Block