Campbell Scientific AM16/32B Relay Multiplexer - Manual (Page 23)

AM16/32B Relay Multiplexer
5.1 CRBasic P
rement loop. The
program must also specifically increment an index variable and use that
ASUREMENT LOOP
SubScan(0,sec,16) 'Measures 16 sets
ELAY
) ‘Set port 2 high
easurement instruction
‘Storing results in Variable(I)
END MEASUREMENT LOOP
NextSubScan
DEACTIVATE MULTIPLEXER
Portset
(1 ,0) 'Set C1 Low to disable Multiplexer
The CRBasic instructions used to program the multiplexer are described below.
PortSet Syntax:
rogramming
The CR5000, CR800, CR850, CR3000, and CR1000 are programmed with
CRBasic. The PortSet() instruction enables or disables the multiplexer and the
SubScan()/NextSubScan instruction begins/ends the measu
variable to determine where each measurement is stored. The generalized
CRBasic programming sequence follows:
ACTIVATE MULTIPLEXER/RESET INDEX
Portset
(1 ,1) 'Set C1 high to Enable Multiplexer
I=0
BEGIN ME
CLOCK PULSE AND D
Portset
(2,1
Delay (0,20,mSec)
Portset (2,0) ‘Set port 2 low
INCREMENT INDEX AND MEASURE
I=I+1
'User
specified m
PortSet( Port , State )
Where,
Port: the datalogger control port being used.
State: 0 = Set port low;
Non-zero = Set port high.
PortSet must appear within a Scan/NextScan loop or a compiler
error will occur. This instruction must NOT be placed inside a
conditional statement when running in pipeline mode.
SubScan/NextSubScan Syntax:
SubScan (
SubInterval , Units , Count )
NextSubScan
Where:
ns.
Enter 0 for no delay between subscans.
NOTE
SubInterval: constant that designates the time interval between subsca
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