24 8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide
1 Introduction to Programming
Figure 3 The Registers and Filters for a Node
The Operational/Questionable Slot Status Event Register (OSSER/QSSER)
contains the status of a particular module slot. A bit changes from 0 -> 1
when an event occurs, for example, when a laser is switched on. For
details of the function of each bit of these registers, see
Operation/Questionable Status Summary Register on page 28.
The Operational/Questionable Slot Enable Status Mask (OSESM/QSESM)
allows you to choose the events for each module slot that may affect the
Operational/Questionable Status Event Register (see below). If you set a
bit of the OSESM/QSESM to zero, the occurence of the corresponding
event for this particular module slot cannot affect the
Operational/Questionable Status Event Register. The default is for all the
bits of the OSESM/QSESM to be set to 0.
The Operational/Questionable Status Event Summary Register
(OSESR/QSESR) summarizes the status of every module slot of your
instrument. If, for any slot, any bit of the QSSER goes from 0 -> 1 AND the
corresponding bit of the QSSEM is 1 at the same time, the QSESR bit
representing that slot is set to 1.
Enable Registers
To the
Condition Register
of the Next Node
Event Registers
Condition Registers
OR
11111
A positive transition in the condition
causes the corresponding bit of the
to change from 0 -> 1.
corresponding event register
register, when a bit changes from 0 -> 1,
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