Campbell-scientific CR800 and CR850 Measurement and Control Systems Uživatelský manuál stáhnout pdf (Strana 464)

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Appendix A. CRBasic Programming Instructions

464

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A.5.7 Digital I/O

CheckPort

Returnsthestatusofacontrolport.

Syntax

X = CheckPort(Port)

PortGet

Readsthestatusofacontrolport.

Syntax

PortGet(Dest, Port)

PortsConfig

Configurescontrolportsasinputoroutput.

Syntax

PortsConfig(Mask, Function)

ReadIO

ReadsthestatusofselectedcontrolI/Oports.

Syntax

ReadIO(Dest, Mask)

A.5.7.1 Control

PortSet

Setsthespecifiedporthighorlow.

Syntax

PortSet(Port, State)

PulsePort

Togglesthestateofacontrolport,delaysthespecifiedamountoftime,toggles

theport,anddelaysasecondtime.

Syntax

PulsePort(Port, Delay)

WriteIO

WriteIOisusedtosetthestatusofselectedcontrolI/Ochannels(ports)onthe

CR800.

Syntax

WriteIO(Mask, Source)

A.5.7.2 Measurement

PWM

Performsapulse‐widthmodulationonacontrolI/Oport.

Syntax

PWM(Source,Port,Period,Units)

TimerIO

MeasuresintervalorfrequencyonadigitalI/Oport.

Syntax

TimerIO(Dest, Edges, Function, Timeout, Units)

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