Support User Manuals

Sierra Wireless MP 875 Modem User Manual

Open as PDF

of 84

MP875 Modem User Guide

62 2130808

Analog input setup

TheAnalogInputwindow(Tools > Options > MP > Input/Output)

isusedtoconfiguredevicesonthefouranaloginputs.Eachtab

correspondstoapin:

Toconfigureananalogsensororgauge,selectthetabthat

correspondstothepinyouareusingandcompletethefieldsas

follows:

• Label:Enteradescriptionofthesensororgauge(Measured

Voltage

,Vehicle Speed,etc.),upto20characterslong.

• Rawvalue:Showstheanalogvaluefromtheinpu t(read‐

only).Theanaloginputhasa10‐bit(1024‐step)resolution,

sotherawvaluerangeisbetween0and1023.

• Zeroscale:Entertheminimumvaluefortheunitsyouare

reporting(usedtoconverttherawanalogvalueofzero).

• Fullscale:Enterthemaximumvaluefortheunitsyouare

reporting(usedtoconverttherawvalueof1023).

• Currentvalue:Showstheresultingconvertedvalueusing

thezeroandfullscalesentered.

• Unit:Specifytheunitsoftheinput(volts,km/h,etc.),upto

20characterslong.

Example

Ifyouaremeasuringtemperature,andthethermometeryou

haveconnectedtotheI/Oconnectormeasuresbetween‐30

(rawvalue0)and+50(rawvalue1023)degreesCelsius,then

yourzeroscaleis

-30.0andyourfullscaleis50.0.Yourlabel

couldbe

“Temperature”,andunits,“degrees C”.

Themeasurementsarecalculatedforthe81‐degreerange

(between‐30and+50),whichisdividedinto1024steps

(0.0791

degreesperunitstep).Areadingof25degrees

(56

degreesabovetheminimum)wouldthereforeshowaraw

valueof708(56

degrees/0.0791degreesperunit).

Analog Tab Connector Pin

Input 1 14

Input 2 7

Input 3 15

Input 4 8

previous next