Handling Warnings; Save The Limits; Enhanced Monitor Measurement Cycles - HP E8402A User And Service Manual

Handling Warnings

Save The Limits

Enhanced Monitor Measurement Cycles

38 Using the Enhanced Monitor
With the limits set, the mainframe will beep if a limit is exceeded. However,
you need to include exception procedures in your computer program so that
the program can handle the warnings. To do this, you need to enable the
Enhanced Monitor's Status Subsystem to interrupt the computer when a
warning occurs. Refer to Chapter 3, "Example 2: Setting up the Mainframe"
on page 50, for a program example demonstrating this procedure.
Once you have specified temperature and voltage/power limits for your
mainframe, remember to save the limits in non-volatile memory. Otherwise,
you will start again after a mainframe power-down or reset. Use the
command (page 150) to save the values in non-volatile
SYSTem:NVSave
memory.
The HP E8402 and E8404 Enhanced Monitor monitors over 80 signals
throughout the mainframe every two seconds. These measurements are fed
to the display, the Status Subsystem (for warnings), the History Subsystem
(for storage), and the Fan Controller. The display shows the measurements
pertinent to the screen displayed, updated every two seconds. The Status
Subsystem sets status bits in the condition registers, updated every two
seconds. The History Subsystem calculates minimums, maximums, and
histogram values, updated every two seconds. However, the Enhanced
Monitor stores its measurements in the Trace Subsystem only once every 10
seconds.
During the measurement cycle, the Measuring bit in the Operational Status
Condition Register is set and then cleared. This allows you to synchronize
with the measuring cycle if you want to.
Chapter 2