July 2004
Intermediate to advanced
352 pages
9h 30m
English
Content preview from Mitsubishi FX Programmable Logic Controllers, 2nd Edition
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//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/ 0750656794-CH035.3D – 370 – [370–377/8]
19.6.2004 9:24PM
35
Digital to analogue conversion
FX2N-4DA
35.1Introduction
TheFX2N-4DAisa4-channeldigitaltoanalogueconverter(DAC).
EachofthefourchannelsCH1,CH2,CH3andCH4areusedtoconvertthefirst
12bitsofa16bitdataregisterintoacorrespondinganalogueoutputvoltageorcurrent.
Theoutputvoltagerangeis10Vtoþ10V.
Theoutputcurrentrangesareþ4mAtoþ20mAand0mAtoþ20mA.
TheDACisusedtooutputananaloguevoltage/currentto:
1.Displayinformation,i.e.
(a)Analoguemeter
(b)Chartrecorder
(c)Oscilloscope.
2.Controlarangeofoutputdevices,i.e.
(a)Linearactuator
(b)Rotaryvalve
(c)Speedcontroller–Inverter.
35.2Voltageresolution
ThevoltageresolutionofaDACisthechangeintheanalogueoutputvoltage
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