Campbell CR9000, Инструкция по эксплуатации

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Section 7. Measurement Instructions
7-18
Remarks
This Instruction allows the use of the SDM-INT8, 8 Channel Interval Timer,
with the CR9000. The INT8 is a (S)ynchronous (D)evice for the
(M)easurement of intervals, counts between events, frequencies, periods,
and/or time since an event. See the INT8 manual for more information about
its capabilities.
NOTE: This instruction must NOT be placed inside a conditional statement.
Parameter
& Data Type Enter INT8 INSTRUCTION PARAMETERS
Dest
Variable or
Array
The array where the results of the instruction are stored. For all output options except
Capture All Events, the Dest argument should be a one dimensional array with as many
elements as there are programmed INT8 channels. If the "Capture All Events" OutputOption
is selected, then the Dest array must be two dimensional. The magnitude of first dimension
should be set to the number of functions (up to 8), and the magnitude of the second dimension
should be set to at least the number of events to be captured. The values will be loaded into
the array in the sequence of all of the time ordered events captured from the lowest
programmed channel to the time ordered events of the highest programmed channel.
Address
Constant
The INT8 is addressable using internal jumpers. The jumpers are set at the factory for address
00. See Appendix A of the INT8 manual for details on changing the INT8 address.
Config8_5
Config4_1
Constants
Each of the 8 input channels can be configured for either high or low level voltage inputs, and
for rising or falling edges.
Config8_5 is a four digit code to configure the INT8's channels 5
through 8. Config4_1 is a four digit code to configure the INT8's channels 1 through 4. The
digits represent the channels in descending order left to right. For example, the code entered
for
Config8_5 to program channels 8 and 6 to capture the rising edge of a high level voltage,
and channels 5 and 7 to capture the falling edge of a low level voltage would be "0303". See
section 2 of the INT8 manual for information about the specification requirements of high and
low level voltage signals.
Digit Edge
0 High level, rising edge
1 High level, falling edge
2 Low level, rising edge
3 Low level falling edge