Campbell-scientific CR10X Measurement and Control System Manuel d'utilisateur télécharger pdf (Page 146)

SECTION 9. INPUT/OUTPUT INSTRUCTIONS

9-14

2 - Trigger if below

limit (low)

3 - Trigger on

rising edge

4 - Trigger on

falling edge

C Destination

0 - Input Storage

1 - Serial port

9600 baud

2 - Serial port

76,800 baud

3 - Serial port

76,800 baud to

SM192/716

D Measurement

0 - Differential

measurement

1 - Single-ended

measurement

05: FP Scan interval (ms,

minimum 1.333 x reps,

limited to 1.333-50 ms)

06: FP Number of scans (units

of 1000)

07: 4 Number of samples

saved before trigger (not

used with serial output)

08: FP Trigger limit (mV,

unscaled measurement)

09: 4 Excitation voltage (mV)

10: 4 1st input location in

which to store data

11: FP Multiplier (not used with

serial output)

12: FP Offset (not used with

serial output)

Input locations altered: number of scans plus

number of samples saved before trigger

*** 24 CALIBRATION ***

FUNCTION

Put 19 calibration values into input locations. If

C (--) is keyed before entering the input

location, then the automatic calibrations are

simply displayed, not measured. Otherwise, the

calibration takes place only when Instruction 24

is executed; automatic calibration is disabled

(Section 13.7).

PARAM. DATA

NUMBER TYPE DESCRIPTION

01: 4 Input location number,

key C (--) for results of

automatic calibration

Input locations altered: 19

*** 25 PORT READ ***

FUNCTION

The status of a group of ports selected by a

mask is read and placed in an input location.

The status is a base 2 representation of the

ports converted to base 10. Port 1 is the least

significant bit. For example, if all ports are read,

and the port status is as follows:

PORT C8 C7 C6 C5 C4 C3 C2 C1

VALUE 128 64 32 16 8 4 2 1

STATUS 0 0 1 100 10

(0=low,

1=high)

Base 10 equivalent: 32 + 16 + 2 = 50

50 will be stored in the input location.

The mask is also base 2 representation; 1

indicates the port is to be read, 0 results in a 0

for the port regardless of the status of the port

(AND operation). For example, if 50 (see above

example) is entered for the mask, ports 2, 5,

and 6 are read. If only ports 4 and 5 are high,

the status will be 16 (port 4 is not read).

NOTE: Voltages in excess of 5.5 volts

applied to a control port can cause the

CR10X to malfunction.

PARAM. DATA

NUM. TYPE DESCRIPTION

01: 4 MASK (0-255)

02: 4 INPUT LOCATION TO

STORE RESULT

Input locations altered: 1

*** 26 TIMER ***

FUNCTION

This instruction will reset a timer or store the

elapsed time registered by the timer in seconds in

an Input Storage location. Instruction 26 can be

used with Program Control Instructions to measure

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 361 362

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Campbell-scientific CR10X Measurement and Control System Manuel d'utilisateur Page 146

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