8-Channel, 16-bit Digital-to-Analog Converter Board User`s Manual
Contents
1. 3 5 Delayed DAC Update Mode The DELAYED DAC UPDATE MODE operation is described in Delayed DAC Update Mode on page 4 4 This mode must have previously been enabled by the Jumper configuration in Program Controlled and External Start Convert Mode on page 2 9 There are two ways for a DAC channel to be updated after the 16 bit word is loaded into the DAC s first register The first way is under program control when data bit D9 is written high to the CSR It should be noted that when setting D9 to initiate the DAC update that control bits D8 and D11 through D14 should be set or reset according to where the user wants the converted output to be routed refer to Table 3 4 on page 3 4 and Table 3 5 on page 3 5 Also a previously loaded DAC may be updated by an external trigger input from another device A programming example of the DELAYED DAC UPDATE MODE is detailed in Program Example Delayed DAC Update Mode on page 3 9 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Test Mode Programming Any of the eight DAC outputs may be selected to pass to an ADC board over test bus 2 to verify the DAC outputs If a MUX is present in the analog backplane then any DAC output can be selected to go to that board for test purposes over test bus 1 Generally the programming sequence for utilizing one of the two test buses is as follows If IMMEDIATE DAC UPDATE MODE is employed then a Cont2. Response Selection GFK 2059A The DAC board is memory mapped in the short I O address space as described in Chapter 3 The DAC board will respond to either of the two address modifier codes that may be issued to the DAC board by a CPU board during a Write or Read cycle The DAC board is factory set to respond to supervisory short I O access To select short nonprivileged I O access and install the jumper at jumper location JO Chapter 2 Configuration and Installation 2 7 Digital Code Selection The DAC board is factory configured for offset binary coding To change the DAC input coding to two s complement binary remove jumper JA and install jumper JB see Figure 2 3 below Figure 2 3 Digital Code Selection JA JB OFFSET BINARY TWO S COMPLEMENT CODE e 2 8 IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Program Controlled and External Start Convert Mode The PROGRAM CONTROLLED START CONVERT MODE is enabled by inserting jumper JD This mode is detailed in Program Control Update Mode on page 4 4 and Delayed DAC Update Mode on page 3 6 With no jumper installed at JD the board operates in the IMMEDIATE DAC UPDATE MODE as described in Immediate DAC Update Mode on page 4 3 and Immediate DAC Update Mode on page 3 3 Installing jumper JE enables the EXTERNAL START CONVERT MODE Jumper JD must also be installed refer to External Trigger Update Mode on pa
3. bus is selected At power up this control bit is low which disengages the test buses Bit D10 Not used Bit D09 Program Control Start Convert When set to a one it generates a signal that transfers contents of previously loaded DACs to the second rank register and updates the analog output Bit D08 Don t care Bits 07 through 00 Not used 1 Channel selection for muxing one of the outputs to either test bus is achieved by writing the CSR data to the data address 10H See Test Mode Programming on page 3 7 for additional information 3 4 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 GFK 2059A Table 3 5 Programming the Control and Status Register for Different Analog Output Variations Bit Definitions Analog Output Over TEST BUS 1 AINTESTBS D15 D14 D13 D12 D11 D10 D09 D08 Not Not Used 1 0 1 1 Used Oor 1 0 Analog Output Over TEST BUS 2 AINTESTBS D15 D14 D13 D12 D11 D10 D09 Not Not Used 1 1 0 1 Used Oor 1 0 Device Used for Real time Fault Detection of DACs Analog Output Over TEST BUS 1 and Over P3 Connector to Field connected pis D12 D11 DIO 1 1 1 0 1 Ne Oor 1 1 Analog Output Over P3 Connector Only pis D12 DIO s 1 0 0 0 Oorl 1 Chapter 3 Programming
4. of Operation 4 9 Chapter 5 GFK 2059A Maintenance This chapter provides information relative to the care and maintenance of the Digital to Analog Converter Board If the product malfunctions verify the following Software System configuration Electrical connections Jumper or configuration settings Boards fully inserted into their proper connector location Connector pins are clean and free from contamination No components of adjacent boards are disturbed when inserting or removing the board from the VMEbus card cage Quality of cables and I O connections User level repairs are not recommended Contact GE for a Return Material Authorization RMA Number This RMA Number must be obtained prior to any return 5 1
5. pos Not Used Control and Status Bits Control and Status Register CSR Read Write Address XXXX0070 Dos Do4 po Not Used Table 3 2 DAC Channels Address Map DAC Channels 0 to 7 Address Write Only Address D15 MSB D00 LSB XXXX0060 DAC OUT 0 XXXX0062 DAC OUT 1 XXXX0064 DAC OUT2 XXXX0066 DAC OUT3 XXXX0068 DAC OUT 4 XXXX006A DAC OUT 5 XXXX006C DAC OUT 6 XXXX006E DAC OUT 7 Note Jumper JC determines whether the board operates in Short Supervisory I O Access or Short NonPrivileged I O Access With the jumper installed Short NonPrivileged I O Access is selected Tables 3 1 and 3 2 above shows addressing information for 16 bit word transfers Data may be transferred to the DACS in 8 bit format When using byte format the low byte is always transferred first then the high byte next For example assuming a board base address of XXXX0000 HEX a low byte transfer D7 to DO to Channel 0 is written to address XXXX0001 HEX The high byte of data D15 to D8 is then written to address XXXX0000 HEX 3 2 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Digital to Analog Converter Board Programming Options There are two types of registers that must be written to for proper operation of the DAC board One is the CSR and the other is the DAC The order in which
6. they are written to may differ depending on the method used to start a conversion Immediate DAC Update Mode The IMMEDIATE DAC UPDATE MODE is described in Program Control Update Mode on page 4 4 and the board is configured for this mode when received from the factory Once this has been set up a 16 bit word can be written to any DAC channel where it will begin immediate analog conversion When byte transfer 8 bit is used to load the DAC channel conversion begins immediately upon the loading of the high byte D15 to D8 All eight DAC channels can be initiated to a value as described in the preceding paragraph before they are connected to the external circuitry After powering up the board load the DAC channels with the initial 16 bit word or two 8 bit bytes required positive true offset binary or binary two s complement coding Table 3 3 below A control word can then be written to the CSR to enable the DAC outputs to the P3 connector The CSR bit description for this mode of operation is detailed in Table 3 4 on page 3 4 and Table 3 5 on page 3 5 Table 3 3 DAC Data Format Analog Output versus Digital Input 10 V Scale Offset Binary Coding Digital Input Code Analog Output Voltage Two s Complement MSB LSB D15 DO 0000 0000 0000 0000 10 000V Full Scale 1000 0000 0000 0000 0100 0000 0000 0000 5 000V 1 2 Scale 1100 0000 0000 0000 1000 0000 0000 0000 0 000V Zero 0000 0000 0000 0000 100
7. to and assumes no responsibility for the accuracy completeness sufficiency or usefulness of the information contained herein No warranties of merchantability or fitness for purpose shall apply indicates a trademark of GE Intelligent Platforms Inc and or its affiliates All other trademarks are the property of their respective owners Copyright 2010 GE Intelligent Platforms Inc All Rights Reserved Contact Information If you purchased this product through an Authorized Channel Partner please contact the seller directly General Contact Information Online technical support and http www ge ip com support GlobalCare Additional information http Awww ge ip com Solution Provider solutionprovider ip ge com Technical Support If you have technical problems that cannot be resolved with the information in this guide please contact us by telephone or email or on the web at www ge ip com support Americas 1 780 420 2010 if toll free 800 option is unavailable Technical Support Email support ip ge com Europe the Middle East and Africa 352 26 722 780 if toll free 800 option is unavailable or if dialing from a mobile telephone Asia Pacific support jp ip 2 ge com ini i 21 3217 4826 su China UL Information 1 EQUIPMENT LABELED WITH REFERENCE TO CLASS L Div 2 GROUPS A B C amp D HAZARDOUS LOCATIONS IS SUITABLE FOR USE I
8. 0 0000 0000 0001 305uV LSB 0000 0000 0000 0001 1100 0000 0000 0000 5 000V 1 2 Scale 0100 0000 0000 0000 1111 1111 1111 1111 9 99969V Full Scale 0111 1111 1111 1111 The analog output may be calculated by the input code written by the processor to the selected DAC channel as follows Analog Output 10 V Digital Input Code in decimal X 20 65536 2059 Chapter 3 Programming 3 3 Example The analog output for a digital input of 0A00H would be 1 0AO00H decimal equivalent is 2560 2 Analog out 10 V 2560 20 65 536 9 21875 Table 3 4 Control Register Data Format and Definitions Control and Status Register D15 D14 D13 D12 D11 D10 D09 D08 Not Not Used Used Control and Status Register D07 D06 D05 D04 D03 D02 D01 D00 Not Used Bit D15 Not used Bit D14 A low state turns the Fail LED ON A high state turns the Fail LED OFF At power up this control bit is low Bit D13 A high state enables the selected analog output to pass out the P2 connector on test bus 2 AOTESTBS At power up this control bit is low Bit D12 A high state enables the selected analog output to pass out the P2 connector on test bus 1 AINTESTBS At power up this control bit is low Bit 0110 When written high it engages one analog output from the DAC to one of two test buses Used in conjunction with D12 and D13 to determine which test
9. 04 is used to select the CSR The DAC circuitry requires 5 V 15 V and 15 V the 5 V is supplied to the board via the P1 and P2 connectors An on board DC to DC converter generates the 15 V and 15 V for the analog circuitry refer to Figure 4 5 on page 4 11 Thus the DAC board only needs 5 V from the chassis power supply 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 V6S0c 34D fo Lf A01 D A CHANNEL SELECT ADDRESS REGISTER TEST REGISTER CLOCK P2 TEST BUS 1 arrived OUTPUTS eee TEST BUS 2 1TO8 SWITCH GND SEN TEST CONTROL 21601 sng 159 2 Figure 4 3 VMEbus Interface Logic and Interface Signals VMEbus CONNECTION P1 BOARD ADDRESS AND ADDRESS MODIFIER A15 to A05 COMPARATOR AM5 to AMO BOARD SELECT 16 TO D As D A ADDRESS D A CHANNEL DATA ADDRESS AND D A CONTROL TRANSCEIVER CONTROL a D15 to DO REGISTER DATA DTACK TRANSCEIVER GENERATOR P2 CONNECTION EXTERNAL DA TRIGGER vocac TO D As B NO B NO ND N IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Figure 4 4 Digital to Analog Converter Board Power n DIG GND 5 V DC TO DC CONVERTER 5V ANA CO GND 15 V 15 V DC TO DC p2 CONVERTER 5 V 15 V 15 V GND ANA CO GFK 2059A Chapter 4 Theory
10. 2010 GFK 2059A Figure 3 2 DAC Programming Sequence Delayed DAC Update Mode POWER UP ON BOARD INITIALIZATION INITIALIZE D A ADDRESS POINTER LOAD D A CONTROL REGISTER GFK 2059A Chapter 3 Programming 3 11 3 12 Table 3 7 Analog Output Control in Delayed DAC Update Mode Analog Out Pathway Control Word D15 to D0 Hex Value P3 Connector 4300 AOTESTBS TEST BUS 2 6E00 AINTESTBS TEST BUS 1 5E00 AOTESTBS and P3 Connector 6F00 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual August 2010 GFK 2059A Chapter 4 GFK 2059A Theory of Operation This chapter discusses the operation of the Digital to Analog Converter Board and is divided into the following sections Operational Overview mmediate DAC Update Mode Delayed DAC Update Mode VMEbus Interface Description 4 1 Operational Overview The Digital to Analog Converter Board performs digital to analog conversion on 16 bit positive true offset binary or two s complement coded words with an analog output range of 10 to 10 V This provides for a resolution of 305 u V for each digital input of 1 LSB change The buffered output voltage settles to within 1 2 LSB in 10 us The DAC offers a Digital to Analog Integrated Circuit IC per channel A Control and Status Register CSR is loaded by the processor and this register controls the functioning of the board The processor can rea
11. CSR to establish whether the analog output is to be connected or disconnected from the P3 connector and which one of two test buses the output is to be routed to The DAC channel to be tested has test data written to it in the IMMEDIATE UPDATE MODE Address bits A01 through A04 are automatically latched into the Address Register when the board is written to The outputs of this Address Register select the DAC channel that has just been updated via the test MUX Test control information previously latched in the CSRs passes the DAC output through the analog test switch to the test bus 2 Test bus 2 is routed via the analog backplane AMXbus to the input of the ADC board where it is available for analog to digital conversion When the ADC completes its conversion it sends an end of convert signal down the P2 backplane to the DAC This signal removes either of the two test bus outputs from the analog backplane Along with the test bus 2 signal being sent to the ADC board the analog ground GND SEN is switched out to the ADC board This provides an input to the ADC board which is similar to a differential signal and is called pseudo differential Pseudo differential solves some of the associated common mode error problems with single ended signals The input to the ADC board is referenced to the ground of the DAC board instead of the local ground at the ADC board effectively canceling out common mode errors associated with different ground potentials at
12. D PC BOARD 2 11 2 12 IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual August 2010 GFK 2059A Figure 2 5 P3 Connector Pin Assignments PC Board FRONT VIEW PIN 16 pp OF P3 PIN 15 CONNECTOR PIN 14 PIN 13 gt PIN 12 PIN 11 PIN 10 p PIN 9 PIN 8 PIN 7 PIN 6 PIN 5 PIN 4 PIN 3 PIN 2 PIN 1 Row C pins are all analog common GFK 2059A Chapter 2 Configuration and Installation 2 13 2 14 Table 2 3 P3 Connector Pin Number Row Row B Row C Signal Mnemonic Signal Mnemonic Signal Mnemonic 1 ANA COM ANA COM 2 AN00 ANA COM 3 AN01 ANA COM 4 AN02 ANA COM 5 AN03 ANA COM 6 AN04 ANA COM 7 05 8 06 9 07 10 11 12 13 14 15 16 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual August 2010 GFK 2059A GFK 2059A DAC Zero Offset and Gain Calibration Note This procedure assumes that the offset binary coding jumper JA is selected Remove power from the Digital to Analog Converter Board Remove any cable connected to the P3 connector Remove the Digital to Analog Converter Board from the chassis assembly and install a VMEbus Extender board in its place Install the Digital to Analog Converter Board on
13. GE Intelligent Plotforms Programmable Control Products IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A 514 000437 000 B August 2010 GFL 002 Warnings Cautions and Notes as Used in this Publication Warning notices are used in this publication to emphasize that hazardous voltages currents temperatures or other conditions that could cause personal injury exist in this equipment or may be associated with its use In situations where inattention could cause either personal injury or damage to equipment a Warning notice is used Caution notices are used where equipment might be damaged if care is not taken Note Notes merely call attention to information that is especially significant to understanding and operating the equipment This document is based on information available at the time of its publication While efforts have been made to be accurate the information contained herein does not purport to cover all details or variations in hardware or software nor to provide for every possible contingency in connection with installation operation or maintenance Features may be described herein which are not present in all hardware and software systems GE Intelligent Platforms assumes no obligation of notice to holders of this document with respect to changes subsequently made GE Intelligent Platforms makes no representation or warranty expressed implied or statutory with respect
14. N CLASS L ZONE 2 GROUPS A B C D OR NON HAZARDOUS LOCATIONS ONLY 2 EQUIPMENT LABELED WITH REFERENCE TO CLASS I ZONE 2 GROUPS A B C amp D HAZARDOUS LOCATIONS IS SUITABLE FOR USE IN CLASS I ZONE 2 GROUPS A B C D OR NON HAZARDOUS LOCATIONS ONLY 3 WARNING EXPLOSION HAZARD SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I DIVISION 2 4 WARNING EXPLOSION HAZARD DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON HAZARDOUS Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 GFK 2059A Contents Introduction Description and Specifications 1 1 Reference Material and Other GE 5 1 1 General Description cue eoe aee nose eite ae abcde 1 2 Functional Description u nennen enne 1 3 Functional Description 1 3 Safety Summary tente eg ain inn prede ere pH ER tede rede 1 4 Configuration and Installation 2 1 Physical Installation n SS A ge LEE ede ex 2 2 Configur tion uei ce e ie IRURE REEL Uer e REIR Eur ioe pie 2 3 Before Applying Power 2 4 Board Address Selection 5 2 5 Address Modifier Response 2 7 Digital Code Selection
15. ciation 7825 East Gelding Dr No 104 Scottsdale AZ 85260 480 951 8866 FAX 480 951 0720 Internet www vita com The following Application and Configuration Guides are available from GE to assist in the selection specification and implementation of systems based upon GE s products Analog I O Products Built in Test Provides assistance in configuring analog I O Configuration Guide catalog number subsystems based on GE s analog I O GFK 2084 products including common designs which offer a wide variety of solutions GFK 2059A 1 1 General Description The primary features of the Digital to Analog Converter Board are as follows IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual August 2010 16 Bit resolution Buffered voltage output 10 V 5 mA Double buffered data latches Eight channels Eight 16 Bit DACs one per channel Front panel Fail LED High reliability DIN type output connector Multiplexed programmable outputs Jumper selectable synchronized update control Double Eurocard form factor Selectable external update control input provides single update strobe for all DAC outputs Fast settling 10 us maximum to 0 0003 percent of FSR GFK 2059A Functional Description The Digital to Analog Converter Board delivers 10 V outputs with positive true offset binary input coding or two s complement coding The Digital to Analog Converter Board features double buffered da
16. d the CSR at any time The DAC board functional block diagram is shown in Figure 4 1 on page 4 5 Double buffered data latches precede each of the eight DACs The data latches allow versatility in the way that the DAC analog output may be updated There are three methods by which new data can be converted by a DAC Each method is enabled disabled by on board jumpers and is further controlled by a CSR that must be loaded by the user the CSR contents are described in Tables 3 1 and 3 2 on page 3 2 Table 3 4 on page 3 4 and Table 3 5 on page 3 5 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Immediate DAC Update Mode The processor unit sends the 16 bit word to be converted to the first register of the selected DAC If that DAC channel has previously been jumpered to it will automatically pass the contents of the first DAC register into the second register and update the analog output There is one jumper that enables disables all eight DAC channels to be in the IMMEDIATE UPDATE MODE as described above or in the DELAYED UPDATE MODE Jumper definition and locations are described in Program Controlled and External Start Convert Mode on page 2 9 GFK 2059A Chapter 4 Theory of Operation 4 3 Delayed DAC Update Mode In the DELAYED DAC UPDATE MODE the processor sends the 16 bit word to be converted to the first DAC register of the selected DAC The data is stored there and transferr
17. each of the boards 4 4 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 GFK 2059A Figure 4 1 Digital to Analog Converter Board Functional Block Diagram OPERATION PROGRAM AND CONTROL EXTERNAL CONTROL UPDATE LOGIC UPDATE 16 BIT 16 BIT NO 1 NO 5 DAC SEL 16 BIT 16 BIT DAC DAC H NO 2 NO 6 SD _ DAC SEL CH7 DAC SEL CH8 DAC SEL DATA BUS lt 4 r W 4 gt V0200 ADDRESS ANALOG REGISTER OUT ISOLATION SWITCHES TEST MODE P2 SELECT AIN E TEST SAIT AOIN TEST SELECT A0 SPDT TEST SWITCH I mag TEST CH8 CH1 A0 TEST 8 CHANNEL AOUT ADDR SELECT 4 MUX Chapter 4 Theory of Operation 4 5 VMEbus Interface Description The VMEbus interface Figure 4 4 on page 4 9 contains the necessary logic to interface a DAC board to the VMEbus The DAC is memory mapped in the VMEbus short I O address space During a Write cycle to the board address bits A05 through A15 are compared with the previously selected board address DIP switches select the board address If the address compares then a board select signal is issued This signal along with the control signals received at the board gate the data DO to D15 to a selected DAC or the CSR on the DAC Address bits A01 through A03 select one of the eight DAC channels Data DO through D15 is latched into the selected DAC Register Address bit A
18. ed to the second DAC register in one of two possible methods described below Program Control Update Mode One way for the transfer to occur is by writing a one to the Control Register bit D09 When the data is transferred to the second register digital to analog conversion begins and the analog output settles to within 1 2 LSB in 10 us This method of updating the analog output is useful when more than one DAC channel output is desired to change at a precise time All eight DAC outputs could be synchronized to change at certain periodic intervals under software control External Trigger Update Mode The second method to update the second storage register and the DAC output by an external TTL compatible trigger This trigger must first have the external trigger circuitry enabled by installing an on board jumper as described in Program Controlled and External Start Convert Mode on page 2 9 The PROGRAM CONTROL UPDATE MODE must also be enabled refer to Program Controlled and External Start Convert Mode on page 2 9 When the external trigger is received active low for a minimum of 150 ns the value stored in the first DAC register will be transferred to the second DAC register and begins a conversion Using this method of updating all conversions can be synchronized to an external device Each of the DAC outputs may be multiplexed one at a time via the test MUX shown in Figure 4 3 on page 4 8 First a control word must be written to the
19. ge 4 4 The external trigger is buffered in through the P2 connector pin A25 with an associated digital ground wire at pin A26 The locations of jumpers JD and JE are shown in Figure 2 2 on page 2 6 GFK 2059A Chapter 2 Configuration and Installation 2 9 2 10 Connector Descriptions Two 96 pin DIN type connectors P1 and P2 connect the DAC board to the VMEbus backplane The primary connector P1 contains the address data and control lines and all additional signals necessary to control data transfer and other bus functions See Figure 2 4 on page 2 11 and Table 2 2 on page 2 12 for the P2 connector signal assignments The P3 connector is a Panduit 32 pin male connector type number 120 332 033A The matching Panduit connector for the input cable is a female connector type number 120 332 435E This connector handles the 16 analog outputs each with an associated analog ground wire See Figure 2 5 on page 2 13 and Table 2 3 on page 2 14 for P3 connector assignment 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 GFK 2059A Figure 2 4 P2 Connector Pin Assignments PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 PIN 9 PIN 10 PIN 11 PIN 12 PIN 13 PIN 14 PIN 15 PIN 16 PIN 17 PIN 18 PIN 19 PIN 20 PIN 21 PIN 22 PIN 23 PIN 24 PIN 25 PIN 26 PIN 27 PIN 28 PIN 29 PIN 30 PIN 31 PIN 32 Chapter 2 Configuration and Installation REAR VIEW OF BOAR
20. itches There are two address select DIP switches on board the Digital to Analog Converter Board Each individual switch corresponds to an address bit or is not used If the switch is ON the corresponding address bit is compared to a logic zero All corresponding address bits must compare with the switch positions during a Write Read of the DAC board Each switch corresponds to the address bits as shown in Figure 2 1 below For the board switch locations are shown in Figure 2 2 on page 2 6 Example For the Digital to Analog Converter Board to respond to a base address of FXFFBC40 6 the S1 and 52 switches would be set accordingly Figure 2 1 Address Selection Switches 16 4 READ THIS DIRECTION 2 2 OFF OPEN 1 S2 8 ON CLOSED 0 0 0 0 0 0 0 1 0 me READ THIS DIRECTION NAT 0 4 6 16 No switches on board to represent bits A00 through A04 These bits are understood to be zeros GFK 2059A Chapter 2 Configuration and Installation 2 5 0102 isnsny 5 4 5 421124107 S0 Duy 01 v 181q 14 91 J2UUDYD 8 SPETVALGIDI 9 7 V6S0c 34D DAC BINARY CODE SELECTION JUMPER COMPONENT SIDE SHOWN JD BOARD BASE JE ADDRESS SELECTION SWITCHES NN S2 S1 ADDRESS MODIFIER DAC UPDATE MODE JUMPER EXTERNAL TRIGGER JUMPER So euy 0j E ISI 991 uo suomne o yas pue 1oduinf c c Address Modifier
21. n a VMEbus system go through the following checklist to verify that the board is ready for the intended operation 1 Have the chapters on Theory and Programming of the DAC board Chapters 3 and 4 been read and applied to system requirements Review Table 2 1 on page 2 3 to verify the factory installed jumpers and board address switches are set to what is desired To change DAC board switches S1 and S2 refer to Board Address Selection Switches on page 2 5 To change address modifier response jumper JB refer to Address Modifier Response Selection on page 2 7 To change the DAC digital code selection refer to Digital Code Selection on page 2 8 To use either the program controlled start convert mode or the external start convert mode refer to Program Controlled and External Start Convert Mode on page 2 9 Has the cable with proper mating connector been connected to the analog output connector P3 Refer to Connector Descriptions on page 2 10 Digital to Analog Converter Board Installation After steps 1 through 5 have been reviewed the DAC board may be installed in a VMEbus system Do not install or remove the board with power ON The DAC board may generally be installed in any slot position except slot one which is usually reserved for the master processing unit IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Board Address Selection Sw
22. n and Installation 2 15 2 16 Figure 2 6 Calibration Adjustment Locations IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual August 2010 COMPONENT SIDE GFK 2059A Chapter 3 GFK 2059A Programming This chapter contains programming instructions for the Digital to Analog Converter Board and is divided into the following sections Introduction to Programming the Digital to Analog Converter Board Digital to Analog Converter Board Programming Options Delayed DAC Update Mode Test Mode Programming Program Example Delayed DAC Update Mode 3 1 Introduction to Programming the Digital to Analog Converter Board The Digital to Analog Converter Board is memory mapped in the short I O address space The board occupies 16 successive word locations in the VME short I O address space of 65 535 bytes Only the first nine word locations are actually used by the board The short I O space is located from XXXX0000 HEX to XXXXFFFF HEX The address bits A31 to A16 are CPU dependent Each Read cycle may be either a word or byte transfer The board base address may be selected by DIP switches as shown in Board Address Selection Switches on page 2 5 Tables 3 1 and 3 2 below represent the DAC address map assuming the factory set base address of XXXX0060 HEX Table 3 1 Control and Status Register Control and Status Register CSR Read Write Address XXXX0070 pis DH DIO Doo
23. of the manual describes the Digital to Analog Converter Board set up procedure and jumper configuration The board select base address and board jumper configuration is factory preset and shown in Table 2 1 below The base address selection switches S1 and S2 are factory configured at XXXX0060 HEX Table 2 1 Digital to Analog Converter Board Factory Preset Configuration Jumper Function Preset Condition 51 Base address selection switches A07 A06 A05 NOT USED A07 A06 A05 ON CLOSED 0 OFF OPEN 1 52 Base address selection switches A15 to A08 A15 08 ON OFF JC Determines address modifier response of the board Installed jumper indicates response to short nonprivileged I O access NOT JC INSTALLED JA JB Determines the digital code written to the DAC JB installed gives two s complement binary coding JA installed gives offset binary coding JA JB JD Installation of this jumper enables the program controlled start convert mode as detailed in Program Control Update Mode on page 4 4 JD ar NOT INSTALLED JE Installation of this jumper enables the external start convert mode as detailed in External Trigger Update Mode on page 4 4 Jumper JD must also be installed to enable this mode JE NOT INSTALLED Chapter 2 Configuration and Installation 2 3 before Applying Power Checklist Before installing the board i
24. replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power and discharge circuits before touching them Do Not Service or Adjust Alone Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present Do Not Substitute Parts or Modify System Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the product Return the product to GE for service and repair to ensure that safety features are maintained 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Chapter Configuration and Installation 2 This chapter contains configuration and installation instructions for the Digital to Analog Converter Board and is divided into the following sections Physical Installation Configuration Before Apply Power Checklist Board Address Selection Switches Address Modifier Response Selection Digital Code Selection Program Controlled and External Start Convert Mode Connector Descriptions Analog Output Accuracy DAC Zero Offset and Gain Calibration _ Caution Some of the components assembled on GE s products may be sensitive to electrostatic discharge and damage may occur on boards that are subjected
25. rol Word should first be written to the CSR This Control Word information includes which test bus the DAC output is to be routed to and whether the output is to be isolated or connected to the P3 connector refer to Table 3 4 on page 3 4 and Table 3 5 on page 3 5 The DAC to be updated is then loaded with a 16 bit word The channel is updated and passes out the selected test bus An output may also be updated under program control to route to a specified test bus The board must have previously been jumpered to accommodate the DELAYED DAC UPDATE MODE as shown in Program Controlled and External Start Convert Mode on page 2 9 The programming sequence is as follows First a 16 bit word or two 8 bit bytes are written to the address of the DAC channel that is to be updated The data is stored in the DAC Register and will be converted by setting the proper bits in a Write cycle to the CSR The CSR must be written to at the same address as that of the DAC channel that has previously been loaded plus 10 HEX For example if the user wanted to convert Channel no 2 which was written to address XXXX0062 HEX then the Control Word would be written to address XXXX0072 HEX XXXX0062 and 10 HEX Data bit D09 when written as one to the CSR initiates the analog conversion of the previously stored 16 bit word The test modes can only be used if an ADC board exists in the same GE analog P2 backplane as the Digital to Analog Converter Board GFK 2059A Chap
26. ror eet tee Dre iiiter 2 8 Program Controlled and External Start Convert Mode 2 9 Connector Descriptions er eere PESEE EEE 2 10 DAC Zero Offset and Gain Calibration sse 2 15 Programming ea erre ee aw Sra Ere SEE eR sassa e enne nna soe asss 3 1 Introduction to Programming the Digital to Analog Converter Board 3 2 Digital to Analog Converter Board Programming Options sess 3 3 Delayed DAC Update 3 6 Test Mode Programmmung e enm er ere Ret eei tree ceres 3 7 Program Example Delayed DAC Update Mode esee 3 8 Theory of Operation 4 1 Operational Overview 4 2 Immediate DAC Update 4 3 Delayed DAC Update Mode eee 4 4 VMEbus Interface 4 6 MAaINf nanee usa aa aus eden 5 1 v Chapter Introduction Description and Specifications 1 This manual describes installation and operation of the IC697V 348 8 Channel 16 Bit Digital to Analog Converter DAC Board Reference Material and Other GE Manuals For a detailed explanation of the VMEbus and its characteristics The VMEbus Specification is available from VITA VMEbus International Trade Asso
27. ta latches buffered voltage outputs and selectable external or internal update control strobes front panel Fail LED is provided for quick fault location GFK 2059A Chapter I Introduction Description and Specifications 1 3 Safety Summary Warning The following general safety precautions must be observed during all phases of this operation service and repair of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of this product GE assumes no liability for the customer s failure to comply with these requirements Ground the System To minimize shock hazard the chassis and system cabinet must be connected to an electrical ground A three conductor AC power cable should be used The power cable must either be plugged into an approved three contact electrical outlet or used with a three contact to two contact adapter with the grounding wire green firmly connected to an electrical ground safety ground at the power outlet Do Not Operate in an Explosive Atmosphere Do not operate the system in the presence of flammable gases or fumes Operation of any electrical system in such an environment constitutes a definite safety hazard Keep Away from Live Circuits Operating personnel must not remove product covers Component replacement and internal adjustments must be made by qualified maintenance personnel Do not
28. ter 3 Programming 3 7 Program Example Delayed DAC Update Mode In the programming example in Test Mode Programming on page 3 7 all eight DAC converters were loaded with a full scale value of FFFH in the IMMEDIATE UPDATE MODE For illustration purposes the same result will be obtained by this programming example by using the DELAYED DAC UPDATE MODE The DELAYED DAC MODE is jumper selectable as described in Program Controlled and External Start Convert Mode on page 2 9 The programming sequence in a flowchart is shown in Figure 3 2 on page 3 12 In the following program example all eight DAC channels are loaded with new data and then updated under program control Alternatively if previously enabled an external trigger input could have initiated the DAC conversion process 1C697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Figure 3 1 DAC Programming Sequence Immediate DADC Start Convert Mode POWER UP ON BOARD INITIALIZATION LOAD D A CONTROL REGISTER INITIALIZE D A ADDRESS POINTER Chapter 3 Programming 3 9 3 10 Table 3 6 Analog Output Control in Immediate DAC Update Mode Analog Out Pathway Control Word D15 to D0 Hex Value P3 Connector 4100 AOTESTBS TEST BUS 2 6C00 AINTESTBS TEST BUS 1 5C00 AOTESTBS and P3 Connector 6D00 IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual August
29. to a high energy electrostatic field Unused boards should be stored in the same protective boxes in which they were shipped When the board is to be placed on a bench for configuring etc it is suggested that conductive material be inserted under the board to provide a conductive shunt Upon receipt any precautions found in the shipping container should be observed All items should be carefully unpacked and thoroughly inspected for damage that might have occurred during shipment The board s should be checked for broken components damaged circuit board s heat damage and other visible contamination All claims arising from shipping damage should be filed with the carrier and a complete report sent to GE together with a request for advice about the disposition of the damaged item s GFK 2059A 2 1 Physical Installation Caution Do not install or remove boards while power is applied To install the board de energize the equipment and insert the board into an appropriate slot of the chassis while ensuring that the board is properly aligned and oriented in the supporting card guides Slide the board smoothly forward against the mating connector until firmly seated Review Configuration on page 2 3 and Before Applying Power Checklist on page 2 4 before operating the board IC697VAL348 8 Channel 16 bit Digital to Analog Converter Board User s Manual GFK 2059A August 2010 Configuration GFK 2059A This section
30. to the VMEbus Extender board Apply power to the module and allow 15 minutes for Temperature Stabilization before making any measurements Using the IMMEDIATE UPDATE MODE write digital code 4100 HEX to the CSR location XXXX0070 This HEX code is the Control Word for output to the Digital to Analog Converter Board s P3 connector Write 8000 HEX to each of the eight DAC channels at addresses XXXX0060 through XXXX006E Using a 6 digit multimeter monitor each DAC output at the P3 connector Connect the negative lead to connector P3 pin C2 Adjust each DAC s offset potentiometer for a voltage of 0 0000 60 u V Refer to Table 2 4 below and Figure 2 6 on page 2 16 for the Potentiometer Location and P3 connector pin for each channel Table 2 4 Digital to Analog Converter Board Calibration Table Channel Offest Pot Gain Pot P3 Connector 1 R23 R21 A2 2 R19 R17 A3 3 R31 R29 A4 4 R27 R25 A5 5 R3 R1 A6 6 R7 R5 7 7 R15 R13 A8 8 R9 A9 9 Repeat Step 7 using digital code FFFF HEX 10 Using the multimeter monitor each DAC output at the P3 connector Connect the negative lead to connector P3 pin C2 Adjust each DAC s gain potentiometer for a voltage of 9 99969 60 uV Refer to Table 2 4 above and Figure 2 6 on page 2 16 for the Potentiometer Location and P3 connector pin for each channel 11 Remove extender and re install board into the chassis Calibration completed Chapter 2 Configuratio
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