Intro to 1771-IFE - CIMT 474 anufacturing Integration II...

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Unformatted text preview: CIMT 474 anufacturing Integration II Introduction to The 1771-IFE Analog Input Module Fall 200 7 T.E. Kostek Topics Part 1 Module Overview Part 2 Wiring Analog Inputs Part 3 Setting Configuration Plugs Part 4 Programming The IFE Module Part 5 Configuring The IFE Module Part 6 Reading Data From The IFE Module Part 7 Block Transfer Instructions 2 Part 1 Module Overview Module Overview The 1771-IFE Analog Input Module: Is an intelligent I/O module which uses block transfer instructions to communicate with the PLC-5 processor module Requires no external power supply Supports up to 16 single-ended or 8 differential analog inputs (channels) Supports both voltage and current inputs (each input is individually configurable) 4 Module Overview The 1771-IFE Analog Input Module: Uses a 12-bit analog-to-digital converter Can be configured to scale data to engineering units 5 Module Overview Available Input Ranges: 6 Module Overview Before the module can be used to read analog inputs, it must be configured. The 1771-IFE module is configured using: Hardware Jumpers, also known as Configuration plugs Software Block transfer write (BTW) instruction 7 8 ( 1 ) A BTW is used to configure the module ( 2 ) Transducer generates analog signal (voltage or current) ( 3 ) An ADC converts analog inputs into digital code which is stored in the 1771-IFEs RAM ( 4 ) A BTR copies data into the processors data table ( 5 ) Check for errors (block transfer read errors, overrange, underrange, etc.) ( 6 ) Buffer valid data 7 ( 7 ) Use the valid data in the program Module Overview A general comment: The techniques and procedures used when working with the 1771-IFE module are similar to the techniques and procedures used when working with other intelligent I/O modules Other similar modules include: 1771-IXE, Thermocouple input module 1771-IR, RTD input module 1771-OFE, Analog output module 9 Module Overview Refer to the 1771-IFEs user manual as needed: Publication 1771-6.5.90 May 1994 This manual (pdf file) can be downloaded from Allen-Bradleys web site. 10 Part 2 Wiring Analog Inputs Wiring Analog Inputs Inputs can be either: Voltage inputs or Current inputs Single-ended or differential The module supports up to 16 single-ended inputs OR 8 differential inputs Each channel can be configured for voltage or current on a per channel basis but the entire module must be setup for either single-ended or differential inputs 12 Wiring Analog Inputs Single-Ended Inputs: Share a common ground The negative leads of the transducers are connected together to a common input at the analog input module Are typically used when all of the transducers wired to a particular 1771-IFE module share a common power supply 13 Wiring Analog Inputs Differential Inputs: The negative leads of the transducers are wired...
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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-IFE - CIMT 474 anufacturing Integration II...

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