User Manual - Integrity Instruments
Contents
1. Reset CPU forces a watchdog timeout Analog Control Nibble and Example The 232M300 Series I O modules equipped with analog inputs utilizes the Linear Technologies LTC1296 analog to digital conversion chip In the process of performing a data sample the user sends a control nibble to the 232M300 Series module The 232M300 Series module in turn performs a data conversion using the control nibble and transmitts a response data sample back The following table lists each of the 16 possible analog configurations NOTE e All numeric data is represent as ASCII Hexadecimal integers e The symbol 1 equates to a carriage return decimal 13 hex 0x0D e See Analog I O Technical Information section for sample to volts conversion Control Nibble Analog Sample o Differential CHO CH1 Differential CH2 CH3 Differential CH4 CH5 Differential CH6 CH7 Differential CHO CH1 Differential CH2 CH3 Differential CH4 CH5 Differential CH6 CH7 Single Point CHO Single Point CH2 Single Point CH4 Single Point CH6 Single Point CH1 Single Point CH3 Single Point CH5 Single Point CH7 nn IO IS CO OI XIV a EB GN Command Response Sent by Host Sent by I O Module Description Q000F 1 Bipolar sample differential CHO CH1 Control 0 Analog sample 0x00F decimal 15 UA123 1 Unipolar sample CH4 Control A Analog sample2. Integrity 2 Instruments P O Box 451 Order Phone 800 450 2001 Pine River Minnesota Fax Phone 218 587 3414 56474 USA Tech Phone 218 587 3120 http www integrityusa com 232M300 Series I O Modules Digital I O Analog I O Table of Contents Introduction FeatureS seves sici do titers 3 QUICK St r citi titats details en Qusay 4 Communications RS 232 Packet Information rrnnrrrrrrrnnnnnvvrrrvrnnnnnnvnvrnnernrsrnnvrnneer 6 Commands and Responses Command and Response Table ccccceeeeeeeeeeeeteeeeeteeeeeeaeees Command and Response Examples wate Analog Control Nibble misii sieniniai iiiad Module Configuration EEPROM Map deira aai 10 EEPROM Map raner asil mts diaca 11 Sampling rates Analog and digitalkameraet 12 Modes of Operation Polled ModE unitarer Asynchronous Update Mode rrnnnnnnrnnnnnnvnnnnnvrnnrnrrnnnrnnrnnnnnnnenennn Continuous stream Mode arrnrvrnnnvnnnvrnnnvnnnvrnrnvnnvvrnrnrernnn i Continuous stream Mode Configuration EEPROM Map Continuous stream Mode Example Digital I O Technical Information Digital I O Characteristics rrrrnrrnnrnnrrrnnonrrnnrnrrrnnrnrrnnrrnnrnnnennnen 16 Digital I O Port Configuration Example PVVM Characteristics PWM Commands scc c svcciccastesssecauessoviesesisnaseadvesposevegitascaenduesvenes ds 17 Analog I O Technical Information Analog I O Characteristics ccccccceeceeeeeeeneeeeeeeeeeeeceee
3. 0x123 decimal 291 EEPROM Map Address Description 0x00 N A Reserved 0x01 N A Reserved 0x02 Data Direction Port 1 Bit set 1 Input Bit clear 0 Output factory default OxFFJ Data Direction Port 2 Bit set 1 Input Bit clear 0 Output factory default OxFFJ 0x04 0x05 Asynchronous Update Mode Configuration 0x0000 No asynchronous updates 0x0001 Change Update on Digital Input or Counter change 0x0002 0xFFFF Timed Update Time Value 1 milliseconds 16 bits upper byte in 0x04 lower byte in 0x05 factory default 0x0000 0x06 Port 1 Power on Default output factory default 0x00 0x07 Port 2 Power on Default output factory default 0x00 0x08 See Note 1 Expander board flag Opto 22 modules attached 0x00 No expander board attached OxFF Expander board attached invert digital signals factory default 0x00 0x09 0x0A D A Channel 0 Power on Default output 12 bits upper nibble in 0x09 lower byte in OXOA factory default 0x000 0x0B 0x0C D A Channel 1 Power on Default output 12 bits upper nibble in 0x0B lower byte in OXOC factory default 0x000 OXOD See Note 2 A D Channels sample clock rate 0x00 Normal A D Channels sample clock rate OxFF Slowed A D Channels sample clock rate factory default 0x00 WARNING N A Reserved The I O Module CPU must be reset before new EE
4. C9F9M 6 6 foot serial cable Make these DIP switch settings for 115 200 baud SW1 ON SW2 ON These are factory default settings see page 21 Launch the EZTerminal program 1 2 Double click the icon in whatever area you have put the program Under Settings then choose Comport and select your RS 232 port 115 200 Baud Rate 8 Data Bits NO PARITY and 1 Stop Bits Under Settings now choose Terminal Settings and check the Append LF to incoming CR box and Local echo typed characters check box You may change the color of the transmitted and received characters by going under Settings and selecting Colors then Transmit or Receive and pick the color of your choice E lz seny cont 115200 RTS OTRS CTSO Dai GOD RED mm a GER LL PTE Steps 2 amp 3 LL J 2 ont i15200 RISD OT CTSO Ose ON RED nant a ss as vo alaisi Dsuenssnt Gsastaenr Step 2 Step 3 Ter EE xs ents eet Mowe ermet 2 El af vn es GE Mas Ca AT MN nat D a CS Di D NM paa ta a OO BE Te me la oe ne Q ot 25 ee pors Step 4 mme Lei gj g E Em ir 0188 Ste Che om he He mm Sa en sas an Chiesa ee eee eee Your First Command Now that you have a EZTerminal session running your ready to power up the 232M300 Series I O Module After powering up your 232M300 Series Module EZTerminal will receive a welcome message from the u
5. e All ASCII characters are CASE SENSITIVE use all capital letters Commands and Responses v3 0 Firmware Command Response Sent by Host Sent by I O Module Description V Vxy Firmware version x y l Ixxyy Input digital port status xx PORT 1 yy PORT2 Also returns current output port status Output digital port xx PORT 1 yy PORT2 Set digital direction xx PORT 1 yy PORT2 bit set 1 Input bit clear 0 Output Get current digital direction xx PORT 1 yy PORT2 bit set 1 Input bit clear 0 Output NXXXXXXXX Get Pulse Counter XXXXXXXX 32 bit counter value M Clear Pulse Counter Bipolar sample analog y control nibble XXX analog value Unipolar sample analog y control niblle XXX analog value D A output y channel setting 0 or 1 xxx 12 bit D A output Get receive error count xx current count Clear receive error count PVVM xx PWM frequency yyy PVVM duty Write EEPROM yy address xx value Read EEPROM yy address in command XX value in reponse Start continuous stream mode Halt continuous stream mode Reset CPU Command error response Commands and Responses The follovving table illustrates actual command and response data for an RS 232 interface NOTE e All numeric data is represent as ASCII Hexadecimal integers e The symbol I equates to a carriage return decimal 13 he
6. probes Handy terminal strip for all analog connections and voltages MTA 100 jacks are also available for solid state temperature probes available from Integrity Instruments Model ASC 2CH Signal Conditioning Board 2 channels of precision instrumentation amplifiers Gains of 1 10 100 1000 Handy terminal strip for all analog connections and voltages Models DB15TSM and DB25TSM DB Terminal Strip Terminal strip boards to conveniently connect to DB15 and DB25 connectors Models EXP x Digital Interface Board The EXP X unit provides for digital interface and signal conditioning via industry standard opto isolated I O modules such as Opto 22 Each unit has 4 I O points with large easy to use terminal screws If more I O points are required simply plug in another unit up to 16 total I O points Opto isolated modules 90V 140V AC input 12V 140V AC output 3 3V 32V DC input 3V 60V DC output WARRANTY Integrity Instruments warranties all products against defective workmanship and components for the life of the unit Integrity Instruments agrees to repair or replace at it s sole discretion a defective product if returned to Integrity Instruments with proof of purchase Products that have been mis used improperly applied or subject to adverse operating conditions fall beyond the realm of defective workmanship and are not convered by this warranty Copyright 2000 2003 Integrity Instruments Inc All trademarks and o
7. I O Module as in normal operation NOTE Engaging the Continuous Stream mode at a high baud rate 115 2K baud may overwhelm certain host computer systems due to the high volume of data transmitted on the RS 232 link The is especially true of slower 386 or 486 based systems running Windows 95 with limited memory resources Digital I O Characteristics The following chart lists the Digital I O characteristics and values Characteristic Value Digital I O Current I O line source amp sink 25 ma Total current PORT1 200 ma Total current PORT2 200 ma Digital I O Voltage Levels Input Off 0 OV 0 8V Input On 1 2 0V 5 0V Output Off 0 0 6V max Output On 1 4 3V min Pulse Counter Input 1 Mhz max input rate 32 bit counter capture Counter increments on high low transition Digital Port Configuration Example Any Digital I O configuration changes made to the I O Module using the T command are stored in EEPROM locations 0x02 and 0x03 EEPROM Location 0x02 Port 1 I O Configuration EEPROM Location 0x03 Port 2 I O Configuration When using either the T command or directly writing to EEPROM using the W command a binary 1 at a bit location puts the I O line into Input mode while a binary 0 at a bit location puts the I O line into Output mode NOTE e All numeric data is represent as ASCII Hexadecimal integers e The symbol equates to a carriage return decimal 13 hex 0x0D Host Comm
8. N BOARD WIRING BOARD WIRING TB1 VDC 1 2 1 J1 VDC Power 2 5mm IC Description Position and type is the same for all sub models LTC1296 A to D 20 pin DIP LM4040AIZ 5 0 TO 92 5 Vdc 0 1 Voltage Reference LMC555 Timer charge pump 8 pin DIP LTC1448 D to A 8 pin DIP LED Operation Blinking Green 1 per Second Unit functioning correctly idle Blinking Green Rapid or Steady Unit receiving serial data Blinking Red Rapid or Steady Unit transmitting serial data No LED Unit is not functioning Power Supply 7 5 15 0 Vdc approx 50 ma nominal power we suggest our PS9J a 9VDC 400 ma un regulated power supply GND and Shield The GND and Shield terminals are connected on the 232M300 Series boards and are therefore electrically equivalent RS 232 Cabling The RS 232 interface uses a 3 wire RS 232 connection That is to say only three wires are connected between the I O Module and the Host PC TxD RxD and GND RS 232 Flow Control The Integrity Instruments modules do not support hardware or Xon Xoff flow control Peripheral Add On Modules AE 8CH 8 channel analog connection board ASC 2CH 2 channel signal conditioner DB15TSM DB15 terminal strip for analog connector DB25TSM DB25 terminal strip for digital connector EXP x Digital Interface board Model AE 8CH Analog Connection Board Jumper configurable analog inputs 1 4 20 ma inputs 2 10 Vdc inputs 3 Solid state temperature
9. PROM settings take effect NOTE 1 This flag is used when an expander board is attached It allows for polarity interface to the industry standard I O modules used with the expander board based on open collector logic that these modules use 2 This is used to slow the A D Channel sample clock rate This may help when the A D channels have a high impedance input attached EEPROM Map Address Description OxOF N A Reserved 0x10 Continuous Stream Analog configuration count 0x00 No analog stream readings 0x01 0x08 Number of analog queries factory default 0x00 See Modes of Operation Continuous Stream for locations 0x11 0x1A Analog Query 1 control byte analog control nibble Analog Query 2 control byte analog control nibble Analog Query 3 control byte analog control nibble Analog Query 4 control byte analog control nibble Analog Query 5 control byte analog control nibble Analog Query 6 control byte analog control nibble Analog Query 7 control byte analog control nibble Analog Query 8 control byte analog control nibble Continuous Stream Digital Input configuration 0x00 Digital Input status OFF OxFF Digital Input status ON factory default 0x00 Continuous Stream Pulse Counter configuration 0x00 Pulse Counter status OFF OxFF Pulse Counter status ON factory default 0x00 Available to User Analog
10. amp Digital I O Sampling Rates Analog I O Baud Rate 115 200 57 600 Polled Mode 777 412 Continuous Mode 1515 847 310 19 200 143 9600 72 157 Digital I O Baud Rate Continuous Mode 415 200 1884 Sampling rates are in samples per second for a single analog channel or 8 bit digital I O port tested on Windows 2000 850 Mhz P3 with A D clock running at full speed Samples per channel Sample rate number of channels being sampled Modes of Operation The Integrity Instruments I O modules can operate in three operation modes 1 Polled 2 Asynchronous Update 3 Continuous Stream These modes of operation can be used singularly or together in combination 1 Polled Mode By far the Polled Mode is the most common usage of the 232M300 Series I O modules In this mode the Host computer sends a command to the I O Modules which in turn sends an associated response back to the Host computer 1 Command Sent by Host I O Module HOST Computer 2 Response Sent by Module 232M300 Series 2 Asynchronous Update Mode The I O Module sends data without the Host sending a command to poll the I O Module in Asynchronous Update Mode NOTE Asynchronous Update Mode is configured using EEPROM locations 0x04 0x05 Integrity Instruments 232M300 Series User Manual Value at EEPROM Location 0x04 0x05 Description 0x0000 Asynchronous Update Mode disabled 0x0001 State Change Update Digital Input or Pulse Counter
11. analog signal conditioning and digital I O interface These boards conveniently plug into the main unit for ease of installation See page 24 Configurations for 232M200 models with enclosure are 232M300CE 16 digital I O 232M3A0CE 16 digital I O and 8 channels A D conversion 232M3ADCE 16 digital I O and 8 channels A D conversion and 2 channels D A conversion I O Module features MPU EEPROM MPU Clock Interface Baud LED Watchdog POR Brownout Temperature PCB Power Peripherals Microchip PIC16C65B Microchip 25C040 14 7456 Mhz RS 232 single ended 9600 19200 57600 115200 DIP switch selectable Bicolor diagnostic LED MPU has built in watchdog timer MPU contains timed Power On Reset circuitry MPU brownout detection ciruictry built in 0 to 70 C 32 to 158 F Commercial Temperature Range 40 to 85 C 40 to 185 F Industrial Temperature Range FR4 7 5Vdc to 15 0 Vdc approx 50 ma nominal power See the plug in peripheral section on page 24 232M300 Series Features 16 Digital I O lines 8 12 bit Analog Inputs 2 12 bit Analog Outputs PWM Output 32 bit Pulse Counter 1 Mhz RS 232 Full duplex 232M300 12 bit analog acquisition digital I O lines Quick Start Instructions You need the following EZTerminal program available free on our website http www integrityusa com An open COMPORT on your PC Power supply PS9J 9VDC 400 ma unregulated A cable to connect your PC
12. and Module Response Action T0000 1 T All I O lines are configured as Outputs TFFFF4A Ta All I O lines are configured as Inputs TFFOOW Port 1 bits 0 7 Inputs Port 2 bits 0 7 Outputs TOOFF Port 1 bits 0 7 Outputs Port 2 bits 0 7 inputs T1234 1 Port 1 bits 4 1 Inputs Port 1 bits 7 6 5 3 2 0 Outputs Port 2 bits 4 5 2 Inputs Port 2 bits 7 6 3 1 0 Outputs Pulse Width Modulation PWM Characteristics The 232M300 Series modules have a configurable PWM output There are two settings to configure for proper PWM operation PWM frequency and PWM duty cycle PWM Command Pxxyyy xx Pwm_Divisor yyy Pwm Duty 10 bits max Pwm Divisor 0x00 OxFF Pwm Duty 0x000 Ox3FF Pwm Duty 0 PWM output is disabled output 0 PWM Control Values 14 7456 Mhz clock PWM Period Pwm Divisor 1 3686400 PWM Duty Period Pwm_Duty 14745600 Duty_Resolution log 14745600 Fpwm log 2 PWM Duty Cycle PWM Duty Period PWM Period if PWM Duty Period gt PWM Period then PWM Duty Cycle 100 Pwm_Divisor PWM Freq Duty_Resolution OxFF 255 14400 Hz 10 bits See note OxFE 254 14456 Hz 10 bits Ox5B 91 40069 Hz 8 bits 0x00 0 3686400 Hz 2 bits Note Pwm_Divisor OxFF cannot achieve complete 100 duty cycle Use Pwm_Divisor OxFE if 100 duty cycle is required Example PWM Commands e All numeric data is represent as ASCII Hexadecimal integers e T
13. change 0x0002 to OxFFFF Timed Update Decimal Range Time Value 1 millisecond 2 to 65535 Range 002 second 65 5 seconds 2a Asynchronous Update Mode State Change Update When EEPROM locations 0x04 0x05 0x01 the 232M300 Series I O module enters an asynchronous update mode whereby any detected change on the Digital Input port or the Counter Capture port causes the I O module to transmit data to the host Status Change Data Sent by I O Module Digital Input port change IXXXX Counter Capture change Nxxxx HOST 1 Data Sent by Module I O Module Computer 232M300 2b Asynchronous Update Mode Timed Update When EEPROM locations 0x04 0x05 0x0002 0xFFFF the 232M300 Series I O module enters a timed update mode whereby the I O module will send data to the host after the specified time period has elapsed Time Period Value EEPROM locations 0x04 0x05 001 second When using Asynchronous Update Mode the I O module uses the Continuous Stream Mode configuration to determine the data sent to the host 3 Continuous Stream Mode The final mode of operation is Continuous Stream mode This mode constantly sends or streams data to the host until the host halts the mode In brief the I O Module can send 0 thru 8 analog samples digital input status and the counter capture status The Continuous Stream mode function will work in all other modes The I O module uses parameters found in EEPROM loca
14. eteeeeeeeae Voltage References nnnnnrnnnnnnrnnnnnrnnnnnnvennrnnrnnnnnnrnnnnnnnnnnnnnesennen Analog Voltage Sampling Analog Conversion Analog Offset Calibration Analog Current Sampling Analog Current Conversion Digital amp Analog I O Port Specifications Digital amp Analog pin OUtS rrrrnnrrnnanrrnnnrnrrnnnnrrrnnnnnrnnnrnnrnnsennnnennn 21 Module Specifications PGB Ilustr tionssuisaiisass a a ct eee Goes 22 Dip switch and jumper settings cccceeeseeeeeeeeeeeeteeteeeees 22 232M300 Series Module Specifications c cceeeceeeeeeeeees 23 232 cabling and Specifications cccccececeeeeeeeeeeeeeeeeeseneeeeeaee 23 Peripherals Analog Connection Board cccccceeeeeeeeeeeeeeeeeeeeeseneeeseneeeeees Signal Conditioner Board ccccceeeeeeceeeeeeeeeeeneeeeeeeeeeeeneeeseaes DB15 DB25 Terminal Strip Board og Digital Interface Board mrrnrrnnnnnvrnnnnnvrnnrnvrnnnnnrrenrnnrnnrrnnnnsrsnnnene Introduction Welcome to the Integrity Instruments 232M300 Series of I O modules These modules using RS 232 communications are available in different configurations dependent on your needs and applications In addition they are offered in an enclosure or open allowing you the end user complete flexibility when determining the parameters for your project In addition Integrity Instruments offers a full line of peripheral attachment boards for
15. he symbol I equates to a carriage return decimal 13 hex 0x0D Host Command Module Response Action P0000 1 PWM off Any duty cycle of 0 disables PWM output P4801F 4 PWM frequency 50499 Hz PWM duty 10 6 PFE3FF4 PWM frequency 14456 Hz PWM duty 100 PFE1FE4 PWM frequency 14456 Hz PWM duty 50 Analog I O Characteristics Characteristic Value A D Converter Linear Tech LTC1296BCN 5 LSB Linearity Error LTC1296BCN 0 012 5 LSB Gain Error 0 012 5 LSB Offset Error 0 17 Temperature Drift 100 ppm C max Max Input Voltage 5V D A Converter Linear Tech LTC1448 Offset Error 10 mv LTC1296 Operation The analog inputs of the LTC1296 look like a 100pf capacitor Cin in series with a 500 Q resistor Ron Cin gets switched between and inputs once during each conversion cycle Large external source resistors and capacitances will slow the settling of the inputs It is important that the overall RC time constant is short enough to allow the analog inputs to settle completely within the allowed time The voltage on the inputs must settle completely within the sample period Minimizing Rsource will improve the settling time If large source resistance must be used the sam ple time can be increased by using a slower CLK frequency Sampling Analog Voltage Inputs By far the most common configuration of the 232M300 Series I O modules
16. is to sample voltage values Analog voltage levels are converted to integer digital values using the Linear Technologies LTC1296 A D Analog Digital chip The input voltage range is determined by the reference voltage There are two analog sample types 1 Unipolar 2 Bipolar Both A D sampling types result in a 12 bit binary integer value Vref 5 000 standard Unipolar Analog Sampling Resolution Unipolar analog sampling span is from ground GND to voltage reference Vref Only positive voltages are sampled in unipolar mode The unipolar sample is represented as an unsigned integer as follows Unipolar voltages OV Vref The benefit of using Unipolar samples over Bipolar samples is that a 12 bit binary value is spread out over less total voltage span Vref total 1 LSB unipolar Vref 4096 1 LSB unipolar 5 000 4096 1 LSB unipolar 0 0012207 volt Bipolar Analog Sampling Resolution Bipolar analog sampling span is from Vref to Vref Both negative and positive voltages are sampled and represented as a signed binary integer 2 s complement as follows Bipolar voltages Vref O Vref The benefit of using Bipolar sampling over Unipolar is obvious negative voltages The downfall of using Bipolar sampling is that a 12 bit binary value is spread out over a larger total voltage span 2 Vref total 1 LSB bipolar Vref 2048 1 LSB bipolar 5 000 2048 1 LSB bipolar 0 0024414 volt Voltage Conversion The Anal
17. nit indicating you are ready to provide your first command RS 232 Firmware Version 3 1 Command e Typethe letter V and the Enter Key e You should see V30 on the screen e NOTE Make sure to type CAPITAL V not lowercase v After your first command see Commands and Responses section for more commands Screenshots and setup instructions performed running EZTerminal on a PC installed with Microsoft Windows XP Operating System i OA th seno Lomo vee Hpo OSU SEA RD Integrity Instruments 232M200 Module v3 1 s 2i Ready COMI 115000 ATES OTR CTS OSA Gow RED CAP MM A Communications The Integrity Instruments 232M300 Series I O Modules support RS 232 communications interface using simple ASCII commands A carriage return decimal code 13 or Hex code 0x0D marks the end of each command Line feeds decimal code 10 or Hex code 0x0A are ignored RS 232 Interface e RS 232 operates Full Duplex e RS 232 modules can also enter Continuous Stream Mode whereby the module is configured via EEPROM settings to continuously send data to output its current Digital Counter or Analog readings RS 232 Command Format RS 232 Command Format Command Response CR ASCII carriage return 13 0x0D hex NOTE e All numeric data is represent as ASCII Hexadecimal integers values x y in the Command and Response table e If a module receives an illegal or improperly formatted command Error Response is sent
18. og conversion value obtained from the 232M300 Series module is represented as an integer value either signed for Bipolar samples or unsigned for Unipolar sample and is normally converted to a Real or Floating Point number for ultimate usage Vref 5 000 standard Unipolar Voltage Conversion Formula Volts unipolar ADC_Sample 5 000 4096 Volts unipolar ADC_Sample 0 0012207 Bipolar Voltage Conversion Formula The following assumes that ADC_Sample is an unsigned integer value if ADC_Sample gt 2048 Volts bipolar ADC_Sample 4096 5 000 2048 if ADC_Sample lt 2047 Volts bipolar ADC_Sample 5 000 2048 if ADC_Sample gt 2048 Volts bipolar ADC_Sample 4096 0 0024414 if ADC_Sample lt 2047 Volts bipolar ADC_Sample 0 0024414 Sampling Current 4 20 ma Inputs Many devices output a current value instead of a voltage value The secret to obtaining current readings is a 250 ohm resistor Placing a 250 ohm resistor to ground on a 4 20 ma current input will create a voltage potential of 1V to 5V If we remember Ohm s law E I R R 250 ohms I 004 to 020 amps 4 20 ma E 1 0V to 5 0V Obtaining current readings is a three step process 1 Perform analog Unipolar sample 2 Convert unipolar sample to volts 3 Convert voltage to amps The following formula will convert the raw analog sample reading to a current value Current ADC Sample 5 000 4096 250 Ob
19. olar Analog y analog control nibble Digital Input status disabled Digital Input status enabled Pulse Counter status disabled Pulse Counter status enabled Continuous Stream Mode Example In this example the I O module EEPROM is configured to take 2 Analog samples and update the Counter status EEPROM Location 0x10 0x02 Take 2 Analog samples EEPROM Location 0x11 0x08 Sample 1 Bipolar sample CHO EEPROM Location 0x12 0x89 Sample 2 Unipolar sample CH2 EEPROM Location 0x1A 0x01 Pulse Counter Status enabled Continuous Stream Mode Example continued The following table illustrates the Host Command and I O Module responses for the con tinuous stream example configuration and usage EEPROM Location 0x10 0x02 Take 2 Analog samples EEPROM Location 0x11 0x08 Sample 1 Bipolar sample CHO EEPROM Location 0x12 0x89 Sample 2 Unipolar sample CH2 EEPROM Location 0x1A 0x01 Counter Status enabled NOTE e All numeric data is represent as ASCII Hexadecimal integers e The symbol 4 equates to a carriage return decimal 13 hex 0x0D Host Sends I O Module Sends W10024 Wa W1108 1 Wa W12894 Wa W1A01 1 Wa Sa S4 Continuous Stream mode started Q8023 1 U9823 1 N0000 0044 1 Q8023 1 U9823 1 N0000 0044 1 Tepeats continually H Continuous Stream mode halted The HOST may send any command during the Continuous Stream mode and it will be accepted and processed by the
20. r registered trademarks are the property of their respective owners Revision December 30 2004 v3 0
21. taining accurate Analog samples Please keep the following points in mind when attempting to obtain accurate samples Avoid high impedance analog signal sources Watch out for UPS systems They create loads of EMI EMF noise Keep the analog signal source as close to the ADC x module as possible Keep transformers far away from the 232M300 Series module Use good wiring practices especially in regards to ground connections RS 232 interface can generate approx 2 mv noise Resistors for Analog and Digital I O The digital I O points have a 100K O resistor to ground to prevent floating inputs The analog inputs have a 560 Q resistor in series to afford some protection to the A to D converter VVV From analog input To a d input From input To cpu input o D o T lt I O Port Pin outs ital amp Analo Di Description DB15 Pins And Hex Conversion Chart ANALOG IN CHANNEL 7 ANALOG IN CHANNEL 6 ANALOG IN CHANNEL 5 ANALOG IN CHANNEL 4 ANALOG IN CHANNEL 3 ANALOG IN CHANNEL 2 ANALOG IN CHANNEL 1 le ANALOG IN CHANNEL 0 EXAMPLE HEX CONVERSION Prr PPPLPPP PEE PEET 5VDC REG V UNREG Digital I O V REFERENCE ANALOG OUT B ANALOG OUT A Port 2 Bit 0 Port 2 Bit 2 Pulse Counter Input BOBO B000 OO00 Boon CODDOGODDOCODOCCOOOS Model 232M300 Series Communications Port Digital I O COMMUNICATION PORT ON POWER CONNECTIONS O
22. tions 0x10 thru Ox1A to configure the Continuous Stream mode Therefore the EEPROM must be configured before engaging the Continuous Stream mode Continuous Stream Mode setup steps 1 Configure EEPROM locations 0x10 thru Ox1A 2 Begin Continuous Stream mode by sending command S to the I O Module 3 Halt Continuous Stream mode by sending command H to the I O Module 13 Continuous Stream Mode Configuration EEPROM Locations All parameters configuring the Continuous Stream mode are strored in EEPROM See the following table for a description of the locations and the parameters Use command W to update EEPROM values EEPROM Value Description 0x10 0x00 0x08 Analog Configuration 0x00 No analog samples 0x01 0x08 Number of analog samples Bipolar Analog y analog control nibble Unipolar Analog y analog control nibble Bipolar Analog y analog control nibble Unipolar Analog y analog control nibble Bipolar Analog y analog control nibble Unipolar Analog y analog control nibble Bipolar Analog y analog control nibble Unipolar Analog y analog control nibble Bipolar Analog y analog control nibble Unipolar Analog y analog control nibble Bipolar Analog y analog control nibble Unipolar Analog y analog control nibble Bipolar Analog y analog control nibble Unipolar Analog y analog control nibble Bipolar Analog y analog control nibble Unip
23. x 0x0D Command Sent by Host Response Sent by I O Description V30 1 Module Firmware version 3 0 IFFOOW Input digital port PORT1 bits0 7 ON PORT2 bits0 7 OFF Note this command also returns the current digital output OJ Output digital port PORT1 bits 0 7 OFF PORT2 bit 7 OFF bits 0 6 ON TJ Set digital direction PORT 1 bits 0 7 INPUT PORT2 bit 7 INPUT bits 0 6 OUTPUT GFF80 Get current digital direction PORT1 bits 0 7 INPUT PORT2 bit 7 INPUT bits 0 6 OUTPUT NOOOOOOOF Get pulse counter Current count 15 Mu Clear pusle counter Current count 0 Q100F 1 Bipolar analog control nibble 0x1 Analog reading 0x00F U840F Unipolar analog control nibble 0x8 Analog reading 0x40F LJ D to A Output Channel 1 2 5 Volts Current receive errors 0 Ja Clear receive error count Current receive errors P4801F PJ PWM freq 50499 Hz PWM duty 10 6 VV041041 Wa Write EEPROM Address 0x04 with value 0x10 RO4 1 R104 Read EEPROM Adress 0x04 value is 0x10 SJ SJ IFF00 1 Q100FH IFFOO 1 Q100F i START continuous stream mode See Modes of Operation section This example illustrates continuous stream mode configured to continuously update with Input Digital Port command and Query Analog command with control 0x1 The module continues until a command His received HALT continuous stream mode
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