Owner`s manual

M SERIES DAC
BASE UNIT AND MODULE OPERATION
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RRn<cr>
where n = Channel# (1 to 16 or 0 for all).
REPORT A SINGLE BUFFERED EVENT COMMAND
The Report A Single Buffered Event (RS) command instructs the PDI to report the
first event sample stored in the buffer of the selected channel(s). The Report A Single
Buffer Sample command has the following format:
RSn<cr>
where n = Channel# (1 to 16 or 0 for all).
EVENT SAMPLE REPORTING
An event is defined as a change-in-state of an input channel and return to the original
state. An event may be started on a rising edge (LO to HI) or a falling edge (HI to
LO) as determined by the Latch Polarity. On the V79 PDI-1 switch closure module,
an input is considered to be at a "HI" or "1" state when it is closed (continuity) and a
"LO" or "0" state when it is open (infinite resistance). On the V80 PDI-2 optically
isolated module, an input is considered to be at a "HI" or "1" state when there is
voltage detected and a "LO" or "0" state whenever there is no voltage detected. An
event sample is the actual data associated with an event which is calculated by the
PDI module and sent to the host computer/controller
PDI event sample reporting depends on the Reporting Method used. When using
Immediate Reporting Method, the PDI will report an event sample whenever an event
occurs. When using Schedule Reporting Method, the PDI will report an event sample
whenever a event occurs after the Report Start Time has elapsed. When using
Command Reporting Method, the PDI will report an event sample or multiple
samples on command only.
The PDI module can observe, record, and report when an event happened, how long
the event lasted, and how many events occurred for each individual channel. The
initial occurrence of an event will set the event latch bit and store the associated time
in the latch buffer. You may read the state of the initial event and the time it was
recorded (if time tagging is enabled) by issuing the RL or RR commands.
Each occurrence of an event starts the duration counter and increments the event
counter. The duration counter measures event duration time in milliseconds with a
maximum time of 65,535 stored. You may read the duration of the last recorded
event by issuing the RD command.