Campbell CR800 Specifiche Scaricare il pdf (Pagina 197)

Section 7. Measurement Instructions

Parameter

& Data Type

Enter

Mode

The Mode parameter configures a bank of four ports when a Command code

86 through 90 is used (if any other Command Code is used, enter 0 for the

Mode). Mode is entered as four digits, where each digit indicates the setting

for a port. Ports are represented from the highest port number to the lowest,

from left to right (e.g., 16 15 14 13; 12 11 10 9; 8 7 6 5; 4 3 2 1). There is a

Mode for Ports 16 - 13, 12 - 9, 8 - 5, and 4 - 1. The valid codes are:

Code Description

0 Output logic low

1 Output logic high

2 Input digital, no debounce filter

3 Input switch closure 3.17 msec debounce filter

4 Input digital interrupt enabled, no debounce filter

5 Input switch closure interrupt enabled 3.17 msec, debounce filter

6 Undefined

7 Undefined

8 Undefined

9 No change

Mult, Offset

The Mult and Offset parameters are each a constant, variable, array, or

expression by which to scale the results of the measurement.

SDMSIO4 (Dest, Reps, SDMAddress, Mode, Command, Param1, Param2,

ValuesPerRep, Multiplier, Offset)

The SDMSIO4 instruction is used to control and transmit/retrieve data from a

Campbell Scientific SDM-SIO4 Interface (4 Channel Serial Input/Output

device). See the SDM-SIO4 Serial Input Interface manual for operation

details.

For instructions used for serial input and output without the SDM-SIO4, see

Section 12.

Parameter

& Data Type

Enter

Dest

The Dest parameter is the variable in which to store the results of the

instruction when retrieving data from the SIO4. If data is being sent to the

SIO4, then Dest becomes the source array for the data to be sent. The Dest

array must be at least as large as the Reps parameter value multiplied by the

ValuesPerRep parameter value.

Reps

The Reps parameter defines the number of sequential SIO4s that will be

called by the instruction. The datalogger will poll the SIO4 with the address

set by the Address parameter first, receive or send the number of values set

by the ValuesPerRep parameter next, and then poll the SIO4 with the next

sequential address. If the Reps parameter is 2, the ValuesPerRep is 3, and

the Command parameter is set to receive, then three values from the first

SIO4 would be sent to the first three elements of the Dest array, and three

values from the second SIO4 would be received and written to the forth

through sixth elements of the Dest array.

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Campbell CR800 Specifiche Pagina 197

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