Sensoray 421 Manuel d'utilisateur

Sensoray Model 421ISAbus Analog/Digital I/O Card10/27/1995INSTRUCTION MANUALSensoray Co., Inc.7313 SW Tech Center Dr., Tigard, Oregon 97223voice: 503.

Page 8 Sensoray Model 421 Instruction ManualConnector P3 Pinout:Pin Name Function1 +5V Channel 0 +5V power2 +A0Channel 0 phase A input (+)3 GND Channe

Sensoray Model 421 Instruction Manual Page 9Relay InterfaceRegisterI/O ChannelLocalDataBusOne of 48 Digital I/O ChannelsO.C.RELAYx PortsThe 48 digital

Page 10 Sensoray Model 421 Instruction ManualD/A Interface.DACDAC0LSB8-bit RegisterDAC0MSB4-bit Register12-bitOutputRegisterDAC EnableRegisterCMOSSwit

Sensoray Model 421 Instruction Manual Page 11DAC Data PortsEach DAC is allocated two output ports —DACxLSB and DACxMSB (where x is the DAC identifier

Page 12 Sensoray Model 421 Instruction ManualConnections: Channel 1, 2, and 3Each DAC channel makes two connections to the 421: 0 to +10V output, and

Sensoray Model 421 Instruction Manual Page 13A/D InterfaceStarting a ConversionA/D conversions are initiated by writing to the ADSTART port. The data

Page 14 Sensoray Model 421 Instruction ManualA/D Timing DiagramParameter Symbol Minimum MaximumConversion time tCONV10 usREADLO to READHI delay tDELAY

Sensoray Model 421 Instruction Manual Page 15Unipolar-mode Transfer FunctionAs discussed earlier, A/D output codes are represented as 12-bit unsigned

Page 16 Sensoray Model 421 Instruction ManualAppendix A: SpecificationsBus Interface Type ISA, I/O slave, 16-bit address, 8-bit dataAddress requiremen

Sensoray Model 421 Instruction Manual Page 17Appendix B: I/O Map SummaryAdrs Write Function Read Function0DAC0LSB Loads DAC 0 LSB register without upd

Table of ContentsLimited Warranty 1Special Handling Instructions 1Introduction 2Block Diagram 2Selecting a Base Address 3Fault Indicator 3Status Regis

Page 18 Sensoray Model 421 Instruction ManualAdrs Write Function Read Function0RELAY4 Sets relay channels 0-7 simultaneously. All bits are active high

Sensoray Model 421 Instruction Manual Page 19Appendix C: Connector PinoutsConnector P2: Analog I/OPin Name Function1 DAC0+ DAC channel 0 output2 ADC0+

Page 20 Sensoray Model 421 Instruction ManualAppendix D: ProgrammingSample QuickBasic code segments are listed below to illustrate programming interfa

Sensoray Model 421 Instruction Manual Page 21D/A Interface ProceduresSUB DacEnable (Value%)‘**********************************************************

Page 22 Sensoray Model 421 Instruction ManualA/D Interface ProcedureFUNCTION Digitize% (Chan%)‘*******************************************************

Sensoray Model 421 Instruction Manual Page 23Relay Interface ProceduresFUNCTION ReadRelay% (bankAdrs%, chan%)‘****************************************

Page 24 Sensoray Model 421 Instruction ManualEncoder Interface ProceduresFUNCTION ReadEncoder& (EncoderID%)‘**************************************

Sensoray Model 421 Instruction Manual Page 25Watchdog Timer ProceduresSUB WatchdogEnable (Value%)‘****************************************************

Sensoray Model 421 Instruction Manual Page 1Limited WarrantySensoray Company, Incorporated (Sensoray) warrants the Model 421 hardware to be free from

Page 2 Sensoray Model 421 Instruction ManualIntroductionBlock DiagramPower for linear circuitry is derived from an on-board DC-to-DC converter. Wherev

Sensoray Model 421 Instruction Manual Page 3Selecting a Base AddressFirst Address Nibble (MSB)Adrs S1-15 S1-14 S1-13 S1-120 On On On On1 On On On Off2

Page 4 Sensoray Model 421 Instruction ManualResetWatchdog TimerThe 421 may be reset by either a “hard reset” from the ISAbus system reset signal or a

Sensoray Model 421 Instruction Manual Page 5Encoder InterfaceThree counter channels reside on the 421. Each channel is optimized for incremental encod

Page 6 Sensoray Model 421 Instruction ManualCommand FunctionsThe CNTCTL port is used to invoke all counter command and configuration functions. Three

Sensoray Model 421 Instruction Manual Page 7AB1 2 3 4 5 6 7 8Valid count transitions vs. counter operating modeCounter ConfigurationValid Count Transi