I-O Display Systems Basic I/O Product manual Protocol Compatibility

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Introduction 1

Protocol Compatibility:

The BASIC I/O AD instruction set core complies 100% with that of the OPTO- 22 Optomux

™. With this ASCII character, speak-only-when-spoken-to protocol, a Host transmits inquiry requests to the BASIC I/O AD to determine the status of its various process inputs. Similarly, the software in the Host computer makes control decisions and transmits instructions to the BASIC I/O AD, which in turn, makes the proper changes to its various outputs. Both the Host and its communications link are essential elements in this data acquisition and process control scheme.

Originally the protocol only allowed for all analog or all digital I/O chassis. Depending on application requirements, each BASIC I/O AD can respond to pup to three different function addresses. With their abbreviations they are:

MC Master Unit Control function address

MD Master Unit Digital I/O function address

MA Master Unit Analog I/O function address

It is this multiple function addressing capability of BASIC I/O ADs that allows them to utilize, without modification, software developed for competitive products. Similarly BASIC I/O ADs can operate simultaneously on the same network with these products.

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Contents Page Basic I/O Product Family Page Vol.1 Table of Contents Vol Table of Contents Basic I/O Basic I/OAnalog input instruction types are Analog InputsAnalog Outputs Digital Inputs Digital Outputs Throughput Tables System Throughput7Vol.1 Communication Protocol Analog INPUTS, 12 BIT Analog OUTPUTS, 12 BIT Physical Characteristics DiagnosticsBasic I/O Models Product Test12Vol.1 Mounting Setup & Installation+5V GND Power WiringCommunicating with the Basic I/O Repeat RS-485 can only be multidropRS-485 RS-422RS-485 Programming Communication Wiring Network Bias Resistor Locations Network load V.S. Noise suppressionRS-422 Host to Basic I/O RS-422 Host to Basic I/O wiringRS-422 Basic I/O-To-BASIC I/O multidrop Basic I/O to Basic I/O RS-422 Multidrop or RepeaterRS-485 To-BASIC I/O RS-485 Host to Basic I/ORS-485 Basic I/O to Basic I/O Multidrop Basic I/O to Basic I/O RS-485 Multidrop onlyBasic I/O Connectors, Switches and Indicators Basic I/O setupAddresses Analog/ DigitalBaud Rates Protocol Handshake Types L1 Repeater Network Type SwitchL2 Multidrop L3 Last UnitU1=00 H096 L3 P2 Setup via PushbuttonCommunication verification Error Code Hardware error codesOther error codes Sensor/ Actuator I/O wiringAnalog Inputs 10 AC Current and Voltage Wiring11 Analog Voltage and Current input Wiring Analog outputs 13 Analog Voltage and Current Output WiringDigital Inputs 14 Digital Input WiringDigital Outputs 15 Digital Output WiringAnalog Outputs Vol.1 IndexPage Basic I/O AD Vol Table of Contents Basic I/O AD to Basic I/O AD RS-422 Capacity IntroductionProduct Test Signal compatibility Protocol Compatibility Offsets TemperatureGain/ Slope Range LimitsDigital inputs Read DelayedPulse widths Pulse countingPulse Generator SquarewaveExtended capabilities Ordering Information SpecificationsPosition Basic I/O AD BIO8AD/L8Vol.2 Installation InstallationPower Wiring Multidrop Designing the NetworkRS-422 RS-485 Programming Communication Wiring Network Bias resistor locations Basic I/O AD Connectors, Switches and Indicators Network Type SwitchesLast Unit RS-422 Host to Basic I/O AD Communications WiringRS-485 To-BASIC I/O AD RS-485 Host to Basic I/O ADRS-422 Basic I/O AD-To-BASIC I/O AD Basic I/O AD to Basic I/O AD RS-422RS-485 Basic I/O AD to Basic I/O AD Basic I/O AD to Basic I/O AD RS-485Basic I/O AD Module Placement Worksheet Installing the I/O modules11 AC current and voltage wiring Module Wiring Analog Inputs12 Analog Voltage, frequency and Current input Wiring 14 Analog Voltage and Current Output Wiring 15 Digital Input Wiring 16 Digital output wiring Chassis Setup SetupOffset Mode Function addressesVariable Mode Baud Rates Changing Setup Parameters Via Pushbutton Communication Verification Hardware error codes Vol.2 Index Vol.2 Index