Intro to 1771-OFE - CIMT 474 Manufacturing Integration II...

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CIMT 474 Manufacturing Integration II T.E. Kostek Introduction to The 1771-OFE Analog Output Module Fall 200 7
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2 Topics • Part 1 – Module Overview • Part 2 – Wiring Analog Outputs • Part 3 – Setting Configuration Plugs • Part 4 – Configuring The 1771-OFE1 Module • Part 5 – Generating an Analog Output • Part 6 – Reading Status Information • Part 7 – Programming the OFE • Part 8 – LED Status Indicators
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Part 1 Module Overview
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4 Module Overview • The 1771-OFE Analog Output Module: – Is an intelligent I/O module which uses block transfer instructions to communicate with a PLC-5 processor – Requires no external power supply – Provides 4 analog outputs (4 channels) – Uses 12-bit digital-to-analog converters (DACs)
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5 Module Overview • The 1771-OFE is available in three variations: The 1771-OFE1 is used in the CIMT laboratory. With respect to the 1771-OFE1 module, the actual output voltage for each channel is set via configuration plugs (jumpers). **This document will focus on the 1771-OFE1**
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6 Module Overview • Before the 1771-OFE1 module can be used to generate analog outputs it must be configured. • The 1771-OFE1 module is configured using: Hardware • “Configuration plugs” (jumpers) must be set for each analog output channel Software • A block transfer write (BTW) instruction transfers configuration and output data to the 1771-OFE1 module
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7 (1) The processor computes the count based on the desired analog output voltage. A block transfer write (BTW) is used to configure the OFE AND transfer the count to the OFE. 1771-OFE1 Processor ( 2 ) The OFE module converts the count into a proportional analog voltage using a 12-bit DAC. ( 3 ) The OFE module outputs an analog signal proportional to the count received by the processor. ( 4 ) The processor performs an optional block transfer read (BTR) in order to obtain status information.
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8 Module Overview • Backplane power requirements: – Each OFE module draws the following current from the PLCs 5 volt power supply:
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9 Module Overview • A general comment: – The techniques and procedures used when working with the 1771-OFE analog output module are similar to the techniques and procedures used when working with the 1771-IFE analog input module.
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This note was uploaded on 02/29/2012 for the course MFET 474 taught by Professor Kostek,t during the Fall '08 term at Purdue University-West Lafayette.

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Intro to 1771-OFE - CIMT 474 Manufacturing Integration II...

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