ACC-34A_____________________________Opto 32
Contents
1. paner supply for extemal 0100 0000000000 E side of opt0 isclation o ol or o circuitry POHT A NEWIDEAS IN MOTION Diagrams 372. This form must be completed for mixing sourcing and sinking I Os on the Opto 32 bit Input 32 bit Output board ACC 34A Please check one entry in each row Input Output Check Appropriate Row for Check Appropriate Row for Terminals Sourcing Configuration Sinking Configuration I1 TB1 AIO 7 I2 TB2 AI8 15 I3 TB3 AI16 23 I4 TB4 AI24 31 O1 TB5 BOO 7 O2 TB6 BO8 15 O3 TB7 BO16 23 O4 TB8 BO24 31 Example Suppose it is desired to have O1 sinking O2 O3 and O4 sourcing and 12 sinking with I1 I3 and I4 sourcing For this example the above table should be filled as shown below O2 TB6 BO8 15 O3 TB7 BO16 23 O4 TB8 BO24 31 Input Output Check Appropriate Row for Check Appropriate Row for Terminals Sourcing Configuration Sinking Configuration I1 TB1 AIO 7 I2 TB2 AI8 15 BEEN Y 13 TB3 AI16 23 14 TB4 AD4 31 O1 TB5 BO0 7 S y 4 PMAC ACC 34A Option 1 Custom Order Form 34 Accessory 34A PMAC ACC 34A Option 1 Custom Order Form Accessory 34A DIAGRAMS PIMAC Memory ROM gt UPLOAD FROM ROMOR HOST COVPUTER ROM 128K x8 EAROM 2K x8 HOST gt OK x 24 Stores Pararreters only ien RAM 128K X 24 MENCRY Battery Backed Program X amp Y Memory USER BUFFER MEMORY RAM 47Kx 48 NORMAL 65 nsecs 1 WAIT STATE 20 MHz MEDIUM 45 nsecs O WAIT STATE 20 P Q VARIABLES 256 MOTION PROGRAMS FAST 25 nse
3. FFFFFFFF Units Individual bits MI95 contains the 32 bit value read from the input port of the ACC 34 whose multiplexer port address is specified by MI94 Each bit represents one input from the port Bit n of MI95 represents Input n on the port MS anynode MI96 Multiplexer Port 2 Write Address Range 00 FF Units MACRO Station Multiplexer Port Addresses Default 00 MI96 specifies the address on the MACRO Station s JTHW multiplexer port of a 32 bit output port on an ACC 34 family I O board If MI96 is set greater than 0 the 32 output values will be copied periodically from Station variable MI97 MI96 must match the multiplexer port address of the ACC 34 board from which the inputs are to be read as set by the SW1 DIP switch bank on the board The value of MI96 should be set 6 greater than the base address of the board set by the DIP switch bank MS anynode MI97 Multiplexer Port 1 Write Value Range 00000000 SFFFFFFFF Units Individual bits MI97 contains the 32 bit value written to the output port of the ACC 34 whose multiplexer port address is specified by MI96 Each bit represents one output on the port Bit n of MI97 represents Output n on the port Using ACC 34 with MACRO Station 23 24 Accessory 34A Using ACC 34 with MACRO Station Accessory 34A POWER SUPPLY AND OPTO ISOLATION CONSIDERATIONS The power for the PMAC processor side of the opto isolation circuitry is brought in directly from J1 JTH
4. 10 Pin Terminal Block ccccccccccccccscsessscecececssenscecececsesenssecececcesssusseeececsessauseecececcesesaeseeecessesssassecececeesenseaeeees 3l TBO 10 Pin Terminal Block occccccccccccccsssssecccecsssscsscecececsensussecesecsenssaeseeececsesususseeececeeseaaesecececseseasseeeeecsenenssaeeess 3l TB7 10 Pin Terminal Block occcccccccccccccssscscececesscssscecececsensssseeececseseaeceeececsesesnsseeesecsesesaeseeececeeseaeseeeeecsenesnsaeeess 32 TBS 10 Pin Terminal BIOCK e Venice ies bees 32 TBS 2 Pin Terminal Block iie deer tetas kae Need debe eue ea ede Enara a Rana 32 PMAC ACC 34A OPTION 1 CUSTOM ORDER FORM e ecce esee ee seen oeste stans etta setas eese seen ses seen sea 33 DIAGRAMS 35 Table of Contents Accessory 34A INTRODUCTION PMAC s Accessory 34A ACC 34A is a general purpose discrete input output I O board ACC 34A provides 32 lines of optically isolated inputs and 32 lines of optically isolated outputs Port A contains the 32 input lines AIO to AI31 Port B contains the 32 output lines BOO to BO31 The actual I O Reads and Writes are carried out using a special form of M variables which will be described later ACC 34A is one of a series of I O accessories for PMAC that uses the JTHW connector Others are ACC 34 The Opto 64 bit Input Output board ACC 34B The 64 bit Standard Opto
5. 21 ON ON 22 ON OFF 23 ON ON 24 ON OFF 25 ON 26 OFF 27 ON 28 OFF 29 ON 30 OFF 31 ON 32 OFF This table shows the daisy chain board address relationship with respect to the 5 bit SW1 DIP position setting Note ONZCLOSED OFF OPEN To turn off a switch push down on the open side To turn on a switch push down on the numbered side 6 Multiplex Address Map Accessory 34A INPUT AND OUTPUT PORTS Port A is always configured as an input port and the output lines are driven by writing to port B The input and the output lines can be read or written to using TWS type M variables Once the correct M variable definition assignment is done one may use these M variables in the usual ways e g motion programs PLC programs etc Efficient programming techniques for TWS M variable processing are discussed below Jumpers E1 through E8 and E17 through E21 together with the diode packs DP1 to DP4 determine the sinking sourcing characteristics of the input port see below For sourcing a high level on an input line is read as binary 1 positive logic For sinking a high level on an input line is read as binary 0 negative logic Jumpers E9 through E16 together with drivers U17 through U20 determine the sinking sourcing characteristic of the output port see below For a sourcing setup writing a binary 1 generates a high level on the corresponding output line positive logic For a sinking se
6. Port A AIO 0 31 M1001 gt D 770 M1003 gt D 0010F0 Image word for PLC s M800 gt Y 770 0 M800 gt Y 0010F0 0 Bit0 LSB M801 gt Y 770 1 M801 Y 0010F0 1 Bitl M802 gt Y 770 2 M802 gt Y 0010F0 2 Bit2 M822 gt Y 770 22 M822 gt Y 0010F0 22 Bit22 M823 gt Y 770 23 M823 gt Y 0010F0 23 Bit23 M824 gt X 770 0 M824 gt X 0010F0 0 Bit24 M825 gt X 770 1 M825 X 0010F0 1 Bit25 M830 gt X 770 6 M830 gt X 0010F0 6 Bit30 M831 gt X 770 7 M831 gt X 0010F0 7 Bit31 MSB Port B Setup Write Only PMAC Turbo PMAC Comments M1002 gt TWS 6 M1002 gt TWS 6 Port B BIO 0 31 M1003 gt D 771 M1003 gt D 0010F1 Image word for PLC s M900 gt Y 771 0 M900 gt Y 0010F1 0 BitO LSB M901 gt Y 771 1 M901 gt Y 0010F1 1 Bitl 902 2 Y 771 2 M902 gt Y 0010F1 2 Bit2 ACC 34x Setup Accessory 34A 922 gt Y 771 22 M922 gt Y 0010F 1 22 Bit22 923 gt Y 771 23 M923 gt Y 0010F 1 23 Bit23 924 gt X 771 0 M924 gt X 0010F1 0 Bit24 925 gt X 771 1 M925 gt X 0010F1 1 Bit25 M930 gt X 771 6 M930 gt X 0010F 1 6 Bit30 M931 gt X 771 7 M931 gt X 0010F1 7 Bit31 MSB For PMAC Dual Ported RAM Locations Port A Setup Read Only PMAC Turbo PMAC Comments M1000 gt TWS 1 M1000 gt TWS 1 Port A AIO 0 31 M1001 gt DP D800
7. The entire word must either be all input or all output On power up reset all ACC 34x words are software configured as inputs if the hardware is configured for outputs all outputs will be OFF pulled up to the supply voltage Any subsequent write operation to an I O word on the port with one of these M variables automatically makes the entire word an output word with individual bits ON or OFF as determined by the value written to the word Any subsequent read operation of a word that has been set up for output configures or tries to configure the entire word into an input word which turns any hardware outputs OFF Therefore it is important that the following rules be observed when working with these M variables Never use this M variable form to write to a word that is set up for inputs Never use this M variable form to read from a word that is set up for outputs The best procedure for using TWS M variables in a program is as follows The input word TWS M variable should be copied into its image variable at the beginning of a sequence of operations The operations can then be done on the image variable without requiring PMAC to actually read or write to the I O port for each operation The output word is first assembled into its image variable and then copied to the actual output word once at the end of a sequence of operations This procedure will allow the most efficient and flexible use of TWS M variables Note This type of
8. I O Interface board ACC 18 The Thumbwheel Multiplexer board ACC 8D Option 7 The Resolver to Digital Converter board ACC 8D Option 8 The Absolute Encoder Interface board All of the above accessories use the JTHW multiplex address scheme and several of them may be daisy chained to a single PMAC For enhanced noise reduction and long distance installation Accessories 35A and 35B provide differential buffer capabilities for the JTHW signals The use of the long distance buffer pair ACC 35A and ACC 35B is recommended whenever the required cable length between PMAC and ACC 34x is over 3 meters 10 feet Up to 32 ACC 34As may be connected to a single PMAC which gives a possible 1024 input and 1024 output lines in addition to those available on the PMAC board and on the parallel I O expansion board s ACC 14 Accessory 34 communicates to PMAC via its JTHW connector through the supplied flat cable ACC 34A output drivers are organized in a set of four 8 bit groups Each group each byte may be ordered with either current sourcing drivers default or with current sinking drivers The default configuration of this accessory board uses UDN2981 current sourcing drivers for the four 8 bit output groups With this configuration the current drawn from each output line should be limited to 100 mA at voltage levels between 12 and 24 volts Custom orders ordered as ACC 34A Option 1 are available for current sinking applications In current sinkin
9. M1001 gt DP 060800 Image word for PLC s M800 gt Y D800 0 M800 gt Y 060800 0 BitO LSB M801 gt Y D800 1 M801 gt Y 060800 1 Bitl M802 gt Y D800 2 M802 gt Y 060800 2 Bit2 M814 gt Y D800 14 M814 gt Y 060800 14 Bitl4 M815 gt Y D800 15 M815 gt Y 060800 15 Bit15 M816 gt X D800 0 M816 gt X 060800 0 Bit16 M817 gt X D800 1 M817 gt X 060800 1 Bit17 M830 X D800 14 M830 gt X 060800 14 Bit30 M831 gt X D800 15 M831 gt X 060800 15 Bit31 MSB Port B Setup Write Only PMAC Turbo PMAC Comments M1002 gt TWS 6 M1002 gt TWS 6 Port B BIO 0 31 M1003 gt DP D801 M1003 gt DP 060801 Image word for PLC s M900 gt Y D801 0 M900 gt Y 060801 0 BitO LSB M901 gt Y D801 1 M901 gt Y 060801 1 Bitl M902 gt Y D801 2 M902 gt Y 060801 2 Bit2 M914 gt Y D801 14 M914 gt Y 060801 14 Bitl4 M915 gt Y D801 15 M915 gt Y 060801 15 Bit15 M916 gt X D801 0 M916 gt X 060801 0 Bitl6 M917 gt X D801 1 M917 gt X 060801 1 Bit17 M930 gt X D801 14 M930 gt X 060801 14 Bit30 M931 gt X D801 15 M931 gt X 060801 15 Bit31 MSB Programs Reset PLC program that only runs once on power up or reset OPEN PLC 1 CLEAR M1003 0 Clear output image word to make sure all outputs off M1007 0 Ditto DISABLE PLC 1 To make sure this only runs once on power up reset CLOSE PLC program to copy the inputs into image words at beginning of each scan
10. OPEN PLC 2 CLEAR M1001 M1000 Copy first input word into its image register M1005 M1004 SFFFFFFFF Copy second input word into its image register inverting ACC 34x Setup 19 Accessory 34A CLOSE PLC program that works with individual bits of image words OPEN PLC 3 CLEAR IF M100 1 AND M101 0 AND P43 gt 50 M301 1 ELSE M301 0 ENDIF CLOSE PLC program that copies image words to outputs at end of scan OPEN PLC 31 CLEAR M1002 M1003 Copy first output image word to ACC 34x M10042M1005 FFFFFFFF Copy second output image word to ACC 34x inverting 20 ACC 34x Setup Accessory 34A USING ACC 34 WITH MACRO STATION Two ACC 34 s could be used at each MACRO Station in the ring The MACRO Station has eight variables used for this purpose MI90 MI91 MI92 MI93 MI94 MI95 MI96 and MI97 Each ACC 34 Port has two variables associated with it The first variable is the multiplexer port address and the second is the actual input or output word To read or write to these variables special MACRO Station read and write commands buffered and on line can be used to read and write to and from the Ultralite or Turbo Ultralite Port Address Actual Word Type MI90 MI91 Input Read Only MI92 MI93 Output Write Only MI94 MI95 Input Read Only MI96 MI97 Output Write Only These variables are implemented on MACRO Station firmware versions V1 111 and newer Exam
11. Pack AI0 7 E2 pin 2 to 3 E2 pin 2 to 1 Abs AI8 15 E4 pin 2 to 3 E4 pin 2 to 1 AI16 23 E6 pin 2 to 3 E6 pin 2 to 1 RT li AI24 31 ES8pin2to3 E8 pin 2 to 1 The 32 bit inputs are made up of 4 groups Each input group consists of 8 bits that correspond to lines driven through TB1 to TB4 2 The default configuration is for all sourcing inputs Order ACC 34A with Opt 1 if one or more sinking groups of outputs are needed This requires sending a custom order form to factory Reversed diode pack means pin 1 of the corresponding LED pack must be positioned on pin 11 of socket This is required for sourcing configuration and is installed by factory for the default setup of ACC 34A In addition to the above jumpers E17 to E21 must be set correctly according to the type of input required This is shown in the table below Input Polarity Jumpers Setup Input Type Group Sinking or Sourcing Jumper Setup I1 AI0 7 I2 AI8 15 I3 AI16 23 14 AI24 31 E17 E18 E19 E20 E21 Source Source Source Source 2 to 2 to 2to 2 to 2 to Source Sink 2 to 3 2 to 1 Source Source 2103 2 103 Source Sink 2 to 3 2 to 1 Source Source 2103 21 3 Source Sink 2 to 3 2 to 1 Source Source 2 to3 2 to 3 Source Sink 2 to 3 2 to 1 Sink Source 2to1 2 103 Sink Sink 2 to 1 2 to 1 Sink Source 2to1 21 3 Sink Sink 2 to 1 2 to 1 Sink Source 2 to 1 2 103 Sink Sink 2 to 1 2 to 1 Sink Source 2101 21
12. as the internal image variables for the I O words When this is done a single M variable representing the entire I O word can be used for the copying operation Then separate M variables can be used to access individual bits or segments of the image word Use of these smaller M variables allows PMAC s efficient firmware to do the masking and logic necessary to pick out portions of the I O word rather than slower user program code PMAC Location of Image Words Where should these internal image variables reside in PMAC s memory Open Memory Standard PMAC For a standard PMAC with no DPRAM on board the image word will be in an otherwise unused double register in PMAC s own memory There are several places to find unused registers There are 16 open registers that are set to zero automatically on power up at PMAC addresses 0770 to 077F There are 16 more open registers whose values are held when power is off at PMAC addresses 07FO0 to 07FF It is possible to use the registers of otherwise unused P and Q variables for this purpose These registers should be accessed with fixed point M variables not floating point P or Q variables A double fixed point register in PMAC s internal memory is defined by the D format of M variable e g M61 gt D 07F0 This is a 48 bit register only the low 32 bits will be used The low 24 bits of the I O will be in the Y memory and the high 8 bits of the I O will be in the low 8 bits of X memory DPRAM
13. is a 48 bit register only the low 32 bits will be used The low 24 bits of the I O will be in the Y memory and the high 8 bits of the I O will be in the low 8 bits of X memory When working with the ACC 34x I O with this method of using fixed point image variables the only software overhead is the actual copying between image and I O Including program interpretation time this amounts to about 100 microseconds per 32 bit word Aside from this working with the I O through the image words is at least as fast as direct parallel PMAC I O There is a potential latency of a full PLC scan on the actual I O which must be respected Many systems will have a few critical I O points that cannot tolerate this latency these typically use PMAC s JOPTO port or ACC 14 I O for these time critical points then use ACC 34x for I O that do not need to be so fast DPRAM Standard Turbo PMAC If the system has dual ported RAM Option 2 is required it is probably best to use a 32 bit register in DPRAM This way the host computer always has immediate access to the I O In fact it is possible to use PMAC just as a pass through between the host computer and the ACC 34x boards letting the host computer do all the processing A 32 bit fixed point register in DPRAM is defined by the DP format of M variable e g M80 gt DP 060000 This type of variable occupies the low 16 bits bits 0 to 15 of PMAC Y memory and the low 16 bits of PMAC X memory at the same addre
14. variable can only be used in background tasks PLCs and PLCCs 1 31 They cannot be used in foreground tasks motion programs and PLC and PLCC 0 For an input port m plex is a legal byte number from column 2 of Table 1 plus 1 Any attempt to write to a TWS type M variable defined with bit zero of its address set to 1 is automatically prevented by PMAC s firmware For an output port m plex is a legal byte number from column 2 of Table 1 plus M Variable Assignments 9 Accessory 34A 2 An attempt to read a TWS type M variable defined with bit one of its address set to 1 returns zero and the actual read is prevented by PMAC s firmware Note Individual bits cannot be directly assigned to an M variable of this type Rather banks of 32 bits ports can be assigned to M variables Example To address Port A bits 0 to 31 of board 1 as an input using M100 use the following definition Board Byte Port A amp Port B 5 4 3 2 1 1 0 amp 4 ON ON ON ON ON M100 gt TWS 1 Port A AIO 0 31 of an ACC 34 with SW1 switches all ON assigned for read only 120 41 Similarly to address Port B of the same board 1 as an output using M101 use the following definition M101 gt TWS 6 Port B BIO 0 31 of an ACC 34 with SW1 switches all ON assigned for write only 4 2 6 To address Port A of board 6 as an input using M300 use the following definition Board Byte Port A amp Po
15. 0010F1 for Turbo bits 0 to 7 for the motion programs At the end of a PLC scan to create the actual output word on an ACC 34x from the image words we would use the program statement M103 M101 amp 00000FFF M102 amp SFFFFFOOO The bit by bit AND amp operations make sure no falsely set bits in unused portions of the image words get into the output word They are not strictly necessary if the unused bits can be guaranteed to be zero The bit by bit operation combines the word The assignment of the resulting value to M103 causes it to be written to the ACC 34x If you want to be able to write to the same bit of an output image word with two different priority levels or processors one of the tasks must do so indirectly by writing into a holding register The other task must take this holding register and transfer the bit value into the image word This task must decide what to do in case of any conflict i e one task wants to clear the bit and the other wants to set it The following example illustrates the method of working with ACC 34x I O It describes the procedure for memory allocation for the inputs and for the outputs Image Word Variables that will work with either Dual Ported RAM or PMAC memory locations Example This example shows the image variables both in DPRAM and several places in internal memory In a real application a single location range would probably be chosen ACC 34x Setup 17 Set up and De
16. 1 WHEN TO ACCESS ACC 34X Q 13 PB CC SAX 15 Image Word Variables tt 15 PMAC Location 15 Open Memory Standard PMAC scccscsssessesssesesesecevecnesneecenceaecasenesscessenesecesaesasenssaesecenecsnsnenaceneseeessenesenseas 15 DPRAM Standard PMAC esee eene nennen eene iisen eira ee ep trennt teste tnnn nee 15 Turbo PMAC Location of Image Words ee tut odine eaa oe anena Lon a tU eda due on Go da rade ces 15 Open Memory Turbo PMAC isse ote pe ode d E COEM E EI p logie des ea Eois 15 DPRAM Stand rd Turbo PMAC ete ee ter eet t i Ree eee c e EU PEE EUR cabs 16 Preventing Conflicts in Output Image Words esses eene nennen rennen enne innen 16 ITA Vor p 18 Individual Pieces of Image Words aee e eye tetti epa ante Fe EA apum nue ERR SEHR 18 USING ACC 34 WITH MACRO STATION sesessseesesesseeesosoeseseeceoesosoesesesoeossoeoesesosoroeseseeceseroroeseeesoeeosoeseseeseseeeee 21 MS anynode MI90 Multiplexer Port 1 Read Address esee 22 MS anynode MI91 Multiplexer Port 1 Read Value eese nennen 22 MSf anynode MI92 Multiplexer Port 1 Write Address esee ener nene 22 MS anynode MI93 Multiplexer Port 1 Write Value eese nennen nennen 22 MS anynode M1
17. 3 MI92 must match the multiplexer port address of the ACC 34 board from which the inputs are to be read as set by the SW1 DIP switch bank on the board The value of MI92 should be set 6 greater than the base address of the board set by the DIP switch bank MS anynode MI93 Multiplexer Port 1 Write Value Range 00000000 FFFFFFFF Units Individual bits MI93 contains the 32 bit value written to the output port of the ACC 34 whose multiplexer port address is specified by MI92 Each bit represents one output on the port Bit n of MI93 represents Output n on the port MS anynode MI94 Multiplexer Port 2 Read Address Range 00 FF Units MACRO Station Multiplexer Port Addresses Default 00 MI94 specifies the address on the MACRO Station s JTHW multiplexer port of a 32 bit input port on an ACC 34 family I O board If MI94 is set greater than 0 the 32 input values will be copied periodically into Station variable MI95 MI94 must match the multiplexer port address of the ACC 34 board from which the inputs are to be read as set by the SW1 DIP switch bank on the board For the regular input port the value of MI94 should be set 1 greater than the base address of the board set by the DIP switch bank For the ACC 34C s optional second 32 bit input port the value of MI94 should be set 3 greater than the base address 22 Using ACC 34 with MACRO Station Accessory 34A MS anynode MI95 Multiplexer Port 2 Read Value Range 00000000
18. 3 Sink Sink 2 tol 2101 This is the default factory setup Any other combination is designated as Option 1 Custom order Also see the enclosed Option 1 order form 26 Power Supply and Opto Isolation Considerations Accessory 34A Watch Dog Timer Role of Jumper E22 ACC 34A has a local watchdog timer which is enabled unless the jumper E22 is removed In the default factory setup this jumper is installed A 1 5 second period watchdog timer circuitry is enabled on ACC 34A when jumper E22 is installed When the timer is enabled if PMAC either through a PLC program or a motion program does not reads from or writes to the ACC 34A board at least once per 1 5 seconds the watchdog timer trips When this occurs the output transistors are turned OFF no current is driven on any of the 32 outputs A subsequent read or write always re initializes the board Power Supply and Opto Isolation Considerations 27 28 Accessory 34A Power Supply and Opto Isolation Considerations Accessory 34A CONNECTOR PINOUTS X 5 m COIN DIMI 2 oo t2 26 J1 26 Pin Header Top Viewl Symbol Notes Not connected Not connected Not connected Not connected Not connected Not connected Not connected NC Not connected po NC connected PN COC e ee eee Not connected Not connected This header should be connected to PMAC s J3 JTHW via the supplied 26 pin
19. 94 Multiplexer Port 2 Read Address eese enne 22 MS anynode MI95 Multiplexer Port 2 Read Value eese nettement 23 MS anynode M196 Multiplexer Port 2 Write Address esee nete eene nennen 23 MS anynode M197 Multiplexer Port 1 Write Value eese eene nennen ener 23 POWER SUPPLY AND OPTO ISOLATION CONSIDERATIONS ceres eese eee nete stato senatu seta 25 ACC 34A and Its Option 1 Custom 25 Output Configuration eese eene E E en rene en nette tene EEE street reete enne enne E ne treten nen 25 Input 26 Input Polarity Jumpers Setup n na bade toes io dots ep Lui presos lep 26 Watch Dog Timer Role of Jumper E22 0 ees ccceseessesecneeeeceseeecssecseesecseesecsaeeecsaecaeesecaessesnaeeesaecateaeeaeeaeenaeeneegs 27 CONNECTOR PINOUT emn 29 SE Header 29 TBI 102pin Terminal Block uiis 29 Table of Contents Accessory 34A TB2 10 pin Terminal douse vue 30 1B3 10 Pin Terminal Block nisus Lasten 30 TB4 10 Pin Terminal ets 30 TBS
20. AC s internal memory you can reserve the 24 bits in Y memory for one priority level and the 8 bits in X memory for the other If you are using the DPRAM you can reserve the 16 bits in Y memory for one processor or priority level and the 16 bits in X memory for another If you do this no special techniques need to be used On PMAC simply write to the partial words with a X or Y format M variable PMAC will automatically do the read modify write cycle without touching the other part of the word On the host computer access the DPRAM register with the short 16 bit integer format not the long However if you cannot arrange your split in this fashion you must create separate overlapping image words and explicitly combine them Example Take a system where the low 12 bits will be written to by background PLCs and the high 20 bits will be written to by motion programs Create two separate image words one for each priority level and the actual output word PMAC Turbo PMAC Comments M101 gt D 0770 M81 gt D 0010F0 Image word for PLC programs background M102 gt D 0771 M82 gt D 0010F1 Image word for motion programs foreground M103 gt TWS 6 M83 gt TWS 6 ACC 34x output word write only We also define single bit M variables to parts of these same internal addresses at Y 0770 0010 0 for Turbo bits 0 to 11 for the PLCs then at Y 0771 0010F1 for Turbo bits 12 to 23 and X 0771
21. Cs 1 31 and on line commands The problem can occur when a higher priority task interrupts a lower priority task that is in the middle of changing the image word with a read modify write operation When the lower priority task resumes it will undo the changes made by the higher priority task Similarly if the image word is in the DPRAM and one side starts its read modify write cycle on the word but does not finish it before the other side starts its own cycle the side that starts later can undo the changes made by the side that starts first Note 16 ACC 34x Setup Accessory 34A Two tasks at the same priority level cannot interrupt each other one will always finish an operation before the other starts Therefore there is no need to worry about two motion programs writing to the same image word or a motion program and PLC 0 because these tasks are at the same priority level Similarly there is no need to worry about two background PLC programs writing to the same image word or a background PLC and on line commands To prevent this possible conflict the different priority levels or different processors must use different image words even if they each represent only a part of the same total output word These partial words are then combined in the act of writing to the actual output word The simplest way to split an image word is to use the natural X memory vs Y memory split in PMAC s memory If you are using a double word in PM
22. Standard PMAC If the system has dual ported RAM it is probably best to use a 32 bit register in DPRAM This way the host computer always has immediate access to the I O In fact it is possible to use PMAC just as a pass through between the host computer and the ACC 34x boards letting the host computer do all the processing A 32 bit fixed point register in DPRAM is defined by the DP format of M variable e g M60 DP DF00 This type of variable occupies the low 16 bits bits 0 to 15 of PMAC Y memory and the low 16 bits of PMAC X memory at the same address with the less significant bits in Y memory It appears to the host computer as two 16 bit registers at consecutive even addresses with the less significant bits at the lower address Turbo PMAC Location of Image Words Open Memory Turbo PMAC For a Turbo PMAC with no DPRAM on board the image word will be in an unused double register in Turbo PMAC s own memory There are several places to find unused registers There are 16 open registers that are automatically set to zero on power up at Turbo PMAC addresses 0010F0 to 0010FF Also it is possible to use the registers of otherwise unused P and Q variables for this purpose ACC 34x Setup 15 Accessory 34A These registers should be accessed with fixed point M variables not floating point P or Q variables A double fixed point register in PMAC s internal memory is defined by the D format of M variable e g M80 gt D 0010F0 This
23. USER MANUAL Accessory 34A DELTA TAU Iy Data Systems Inc NEW IDEAS IN MOTION Single Source Machine Control Power Flexibility Ease of Use 21314 Lassen Street Chatsworth CA 91311 Tel 818 998 2095 Fax 818 998 7807 www deltatau com Copyright Information 2003 Delta Tau Data Systems Inc All rights reserved This document is furnished for the customers of Delta Tau Data Systems Inc Other uses are unauthorized without written permission of Delta Tau Data Systems Inc Information contained in this manual may be updated from time to time due to product improvements etc and may not conform in every respect to former issues To report errors or inconsistencies call or email Delta Tau Data Systems Inc Technical Support Phone 818 717 5656 Fax 818 998 7807 Email support deltatau com Website http www deltatau com Operating Conditions AII Delta Tau Data Systems Inc motion controller products accessories and amplifiers contain static sensitive components that can be damaged by incorrect handling When installing or handling Delta Tau Data Systems Inc products avoid contact with highly insulated materials Only qualified personnel should be allowed to handle this equipment In the case of industrial applications we expect our products to be protected from hazardous or conductive materials and or environments that could cause harm to the controller by damaging components or c
24. W The power for the external side of the opto isolation circuitry should be from a separate supply brought in through TB9 This can be any level from 12 V to 24 V The current requirements for the power brought in through TB9 is approximately 0 4 A at 24 volts or 0 8 A at 12 V For TB1 to TB4 inputs the power supply for the 3 3 Kc pull up resistors can range from 15 to 24 volts At 24 volts the current requirement is approximately 70 mA For TB5 to TB7 outputs in the sourcing configuration the supply voltage may range from 12 to 24V The maximum current requirement should be limited to 100 mA per output line which translates to 800 mA per terminal block For sinking configurations the supply voltage may range between 12 and 24 V the maximum current is limited to that which flows through the nine 3 3 Kc pull up resistors approx 70 mA ACC 34A and Its Option 1 Custom Order The default configuration of ACC 34A populates the board with UDN2981 for output sourcing drivers All jumpers and diode packs are set up for sourcing configuration on all inputs and outputs We recommend the use of the Accessory 34 not 34A for an all sinking configuration If it is desired to mix sourcing and sinking I Os then ACC 34A should be order with its option 1 To order ACC 34A Option 1 the enclosed order form must be filled up and sent to the factory Customizing mixing sourcing and sinking I O lines may be accomplished in groups of eight input lines and eight
25. ausing electrical shorts When our products are used in an industrial environment install them into an industrial electrical cabinet or industrial PC to protect them from excessive or corrosive moisture abnormal ambient temperatures and conductive materials If Delta Tau Data Systems Inc products are directly exposed to hazardous or conductive materials and or environments we cannot guarantee their operation Accessory 34A Table of Contents INTRODUCTION 1 CONNECTORS sis E 3 J UUW 3 TB d a en mille A 3 SEB 2 3 3 WD pM cM 3 AU e e Lc HH E ES 3 f 3 gus es 4 fU H M 4 4 MULTIPLEX ADDRESS MAP 5 NDA DIT 6 INPUT AND OUTPUT PORTS 7 M VARIABLE ASSIGNMENTS 9 PROCESSING ACC 34X INPUTS amp OUTPUTS eerie esee senses etes ease senatus esa seta 1
26. ccessory 34A MS anynode MI90 Multiplexer Port 1 Read Address Range 00 FF Units MACRO Station Multiplexer Port Addresses Default 00 MI90 specifies the address on the MACRO Station s JTHW multiplexer port of a 32 bit input port on an ACC 34 family I O board If MI90 is set greater than 0 the 32 input values will be copied periodically into Station variable MI91 MI90 must match the multiplexer port address of the ACC 34 board from which the inputs are to be read as set by the SW1 DIP switch bank on the board For the regular input port the value of MI90 should be set 1 greater than the base address of the board set by the DIP switch bank For the ACC 34C s optional second 32 bit input port the value of MI94 should be set 3 greater than the base address MS anynode MI91 Multiplexer Port 1 Read Value Range 00000000 FFFFFFFF Units Individual bits MI91 contains the 32 bit value read from the input port of the ACC 34 whose multiplexer port address is specified by MI90 Each bit represents one input from the port Bit n of MI91 represents Input n on the port MS anynode MI92 Multiplexer Port 1 Write Address Range 00 FF Units MACRO Station Multiplexer Port Addresses Default 00 MI92 specifies the address on the MACRO Station s JTHW multiplexer port of a 32 bit output port on an ACC 34 family I O board If MI92 is set greater than 0 the 32 output values will be copied periodically from Station variable MI9
27. cs 32 PLC PROGRAMS E O WAIT STATE 30 MHz FIXED amp ROTARY BUFFERS CONPENSATION TABLES TOOL 1Kx48 MDEFINITION End of RAMis definable by user AS NEEDED Diagrams 85 Accessory 34A ACC 34A 32 Bit input 32 Bit output opto board 19 in 3 18 mm 7 o A3 in TBI ye TE E TB3 Ra 3 18 mm o 1 BN uae 5 mim m 8 e ES o sx o 5 15 u c 41 M SINE TOT Tt EHHE TEE e m e e TS 5 OUTPUT SIDE 11 50 in 292 1 mm IUD 7 Note Shaded LEDs are always lit when power is supplied to pin 10 of the respective terminal block Cther LED s connected to individual I O pins U17 20 UDNP2981 for sourcing outputs U17 20 ULN28098 for sinking outputs 2 75in 69 85 mm Diagrams 36 Accessory 34A Connecting ACC 34A to PMAC PORT B nid f ACC 34A 32 Bit in 32 Bit out board
28. d from the PMAC board through this connector For the connection of multiple ACC 34As to a single PMAC a daisy chain cable is required consult Delta Tau for a Special Order on the daisy chain cable A daisy chain cable is also required if one or more Thumbwheel Multiplexer boards ACC 18 or R to D boards ACC 8D Opt 7 are used in conjunction with one or more ACC 34As TB1 This 10 pin Terminal Block is used for the connection to the first set of eight input lines AIO to AI7 A separate power supply for the pull up down resistors of AIO to AI7 should be brought in through this connector 15 to 24V 70 mA TB2 This 10 pin Terminal Block is used for the connection to the second set of eight input lines AI8 to AI15 In addition a separate power supply for the pull up down resistors of AI8 to AI15 should be brought in through this connector 15 to 24V 70 mA TB3 This 10 pin Terminal Block is used for the connection to the third set of eight input lines AI16 to AI23 A separate power supply for the pull up down resistors of AI16 to AI23 should be brought in through this connector 15 to 24V 70 mA TB4 This 10 pin Terminal Block is used for the connection to the fourth set of eight input lines AI24 to AI31 A separate power supply for the pull up down resistors of AI24 to AI31 should be brought in through this connector 15 to 24V 70 mA TB5 This 10 pin Terminal Block is used for the connection to the firs
29. finitions Actual ACC 34 I O Words Accessory 34A M1000 gt TWS 1 First side of first ACC 34x board an input here Locatio M1002 gt TWS 6 Second side of first ACC 34x board an output here Location is at port address 4 added 2 for write only n is at port address 0 added 1 for read only M1004 gt TWS 9 First side of second ACC 34x board an input here Location is at port address 8 added 1 for read only M1006 gt TWS 14 Second side of second ACC 34x board an output here Location is at port address 12 added 2 for write only Image Words PMAC Turbo PMAC Comments M1001 gt DP D800 M1001 gt DP 060800 32 bit fixed point DPRAM register M1003 gt D 0770 M1003 gt D 0010F0 48 bit fixed point register set to zero on power up M1005 gt D 07FO Power down hold registers are not available in Turbo PMAC M1005 gt D 0061F0 PMAC 48 bit fixed point register value held through power down Turbo PMAC use this register for P variable treated as 48 bit fixed point value M1007 gt D 13FF M1007 gt D 0063FF Register for P1023 treated as 48 bit fixed point value User Buffer Storage Space is same for the battery backed Turbo PMAC Individual Pieces of Image Words For PMAC Memory Locations 18 Port A Setup Read Only PMAC Turbo PMAC Comments M1000 gt TWS 1 M1000 gt TWS 1
30. flat cable Pin ev e 3 o w 2 o m TB1 10 pin Terminal Block Top View Symbol Notes Port A Bit 0 Used only for the ten 3 3kc pull up down resistors and LEDs 15 to 24V 70MA Connector Pinouts 29 30 Accessory 34A TB2 10 pin T inal Block wona Used only for the ten 3 3kc pull up down resistors and LEDs 15 to 24V 70 mA X ejrej e 3 o um5 v m 5 Notes TB3 10 Pin T inal Block 10Pin Terminal Bloc meli eI esl nl Pin Used only for the ten 3 3kc pull up down resistors and LEDs 15 to 24V 70 mA epw e o w 2 o m Notes TB4 10 Pin Terminal Block 1 10 Pin Terminal Block Pin Used only for the ten 3 3kc pull up down resistors and LEDs 15 to 24V 70 mA SICle AlA Mm A wre Notes Connector Pinouts Accessory 34A TB5 10 Pin T inal Block a tilii Pin Notes 1 BOO 10 n the sourcing configuration this supply will be used to drive the loads on all eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA v o oo 1 o tAn AIIN TB6 10 Pin T inal Block 10Pin Terminal Bloch mesi eI els ln nl Pin Notes 10 In the sourcing configuration this supply will be used to drive the l
31. g configurations one ULN2803 driver is used for each 8 bit output group Each open collector output line can sink up to 100 mA when pulled up to a voltage level between 12 to 24 volts external pull up resistors are not supplied When this accessory is ordered with its Option 1 the mixing of current sourcing and sinking drivers is possible in 8 bit groups ACC 34A input buffers are also organized in a set of four 8 bit groups Each group each byte uses one ULN2802 driver as the input buffer Both current sourcing and sinking inputs are accommodated by the appropriate setting of the pertinent jumpers and diode groups as explained later in this Manual The default setting is for current sourcing configurations on all inputs ACC 34A also supports a local watchdog timer feature independent of PMAC s The operation of this feature is explained at the end of this manual see also the enclosed schematic Introduction 1 Accessory 34A Introduction Accessory 34A CONNECTORS Refer to the layout diagram of ACC 34A for the location of the connectors on the board A pin definition listing for each connector begins on page 28 of this Manual J1 JTHW This 26 pin Header provides the link between PMAC s JTHW J3 and ACC 34A Using the supplied flat cable PMAC s J3 should be connected to J1 Through this connector PMAC sets the outputs and reads the inputs The power for the processor side of the opto isolation circuitry is provide
32. oads on all eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA MI AJN Connector Pinouts Accessory 34A TB7 10 Pin T inal Block 10Pin Terminal Bloch melle e esl nl Pin Notes 1 10 i In the sourcing configuration this supply will be used to drive the loads on all eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA TB8 10 Pin T inal Block 10Pin Terminal Bloch meli eI slo nl Pin Notes 10 nthe sourcing configuration this supply will be used to drive the loads on all eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA MIR Tt TB9 2 Pin Terminal Block Top View Pin Description Notes 1 External Supply Ground 2 External Supply for Opto Isolators 12V to 24 V Unregulated TB9 is a 2 pin terminal block used to bring in the power supply 12 24V for the I O side of the opto isolation circuitry For proper operation of the board this power supply must be brought in through TB9 Connector Pinouts Accessory 34A PMAC ACC 34A OPTION 1 CUSTOM ORDER FORM
33. opies the input word into its internal image variable Similarly writing an output word to an ACC 34x involves using the M variable for that word on the left side of an equation typically just copying it from its internal image word Most users will treat ACC 34x I O the same way that a traditional PLC treats its I O all of the inputs are read at the beginning of a PLC software scan and all of the outputs are written to at the end of the scan In between all the processing of the variables is done while working with the internal image words It is possible to make the write operation to the output word conditional on a change in the image word for the output from the previous scan but the time involved in making the decision and storing each scan s value is about the same as the actual writing to the output When to Access ACC 34x 13 14 Accessory 34A When to Access ACC 34x Accessory 34A ACC 34X SETUP For the purpose of ACC 34x setup the following example will demonstrate how to utilize 32 inputs and 32 outputs of an ACC 34x Let us first define three variables that will be used during the ACC 34x I O procedure Actual Word Variable Variable which is read or written to by ACC 34x amp PMAC Image Word Variable Variable assigned set equal to Image actual word variable Image Bit Variable Single bit of image word variable Image Word Variables It is best to use fixed point M variables
34. output lines The following tables indicate jumper diode pack and chip modifications required for each group Output Configuration Output Sourcing Sinking Group Output Jumpers Diode Pack Output Jumpers Diode driver driver Pack O1 TB5 U17 is E9 pin 2 t0 3 DP5 U17 is E9 pin 2 tol DP5 BOO 7 UDN2981 E10 pin 2 to Reversed ULN2803 E10 pin 2 to 3 1 O2 TB6 U18 is E11 pin 2 to DP6 U18 is E11 pin 2 to DP6 BO8 15 UDN2981 3 Reversed ULN2803 1 E12 pin 2 to E12 pin 2 to 3 1 O3 TB7 U19 is E13pin2to DP7 Reversed U19 is E13 pin 2 DP7 BO16 23 UDN2981 3 3 ULN2803 tol E14 pin 2 to E14 pin 2 to 3 1 O4 TB8 U20 is E15 pin 2 to DP8 U20 is E15 pin 2 to DP8 BO24 31 UDN2981 3 Reversed ULN2803 1 E16 pin 2 to E16 pin 2 to 3 1 T The 32 bit outputs are made up of 4 groups Each output group consists of 8 bits that correspond to lines driven through TB5 to TB8 Default configuration is for all sourcing outputs Order ACC 34A with Opt 1 if one or more sinking groups of outputs are needed This requires sending a custom order form to factory 3 Reversed diode pack means pin 1 of the corresponding LED pack must be positioned on pin 11 of socket This is required for sourcing configuration and is installed by factory for the default setup of ACC 34A Power Supply and Opto Isolation Considerations 25 Accessory 34A Input Configuration Input Sourcing Sinking Group Diode
35. ple The user wants two ACC 34AAs connected to the multiplexer port on the MACRO station for 128 bits of I O The SW1 settings for the boards in this example are shown below Board Byte Port A amp Port B 5 1 1 ON 2 8 amp 12 ON ON ON ON OFF Based on the switch settings the port address settings would be MSn MI90 1 Port A Board 1 MSn MI92 6 Port B Board 1 MSn MI94 9 Port A Board 2 MSn MI96 14 Port B Board 2 The user could then read and write from and to the MACRO station using the following definitions and commands PMAC Ultralite Turbo PMAC Ultralite Comments M1000 2D 07F0 M1000 gt D 0061F0 input image word for Ultralite board 1 M1001 gt D 07F1 M1001 gt D 0061F1 output image word for Ultralite board 1 M1002 gt D 07F2 M1002 gt D 0061F2 input image word for Ultralite board 2 M1003 gt D 07F3 M1003 gt D 0061F3 output image word for Ultralite board 2 The following commands could be used as either on line commands for testing or they could be used in your PLC or motion program as buffer commands MSRn MI91 M1000 MSWn MI93 M1001 MSRn MI95 M1002 MSRn MI97 M1003 Reads the value of MSn MI91 to M1000 Writes the value of M1001 to MSn MI93 Reads the value of MSn MI95 to M1002 Reads the value of M1003 to MSn MI97 Ne Ne Ne Using ACC 34 with MACRO Station 21 A
36. rt B 5 4 3 2 1 6 40 amp 44 ON ON ON OFF M300 gt TWS 41 Port A AIO 0 31 of an ACC 34 with SW1 switches assigned for read only 41 40 1 Note A 32 bit Read or a 32 bit Write to an individual port takes approximately 64 microseconds of time in the PMAC s background time slot As a result excessive and unnecessary references to TWS type M variables is not recommended see below for efficient ACC 34x I O processing Note TWS type M variable definition addresses which point to the base address directly e g M300 gt TWS 40 are still valid i e they do not generate error However their use is very strongly discouraged This is because both reads and writes are enabled when the least significant and the next least significant addresses bits are both zero e g hexadecimal 40 01000000 in binary In this situation any accidental read of an output port say via the Executive programs watch window will cause all the output transistors to be turned off outputs pulled to the supply voltage Alternatively writing to an input port will automatically reconfigure it to an output port It is therefore safer and more predictable when bits 0 amp 1 of the M variable definition are intentionally used to disable either the read function or the write function 10 M Variable Assignments Accessory 34A PROCESSING ACC 34X INPUTS amp OUTPUTS Because the PMAC interface to the Acce
37. ss with the less significant bits in Y memory It appears to the host computer as two 16 bit registers at consecutive even addresses with the less significant bits at the lower address Preventing Conflicts in Output Image Words Care must be taken if tasks of different priority levels are trying to write to the same output image word or if both the host computer and PMAC are trying to write to the same DPRAM output image word If the proper techniques are not used occasional output changes will not be executed and because of the intermittent nature of the problem it will be very difficult to diagnose If the application has two priority levels or two computers that write to the same ACC 34x output word separate partial image words must be used These words combined as the output word is sent Note There is no conflict in having different tasks or different processors read from the same input word Remember that a computer cannot actually write to less than a word of memory at a time even if it only wants to change one bit In PMAC the word length is 24 bits for the DPRAM itis 16 bits If a computer wants to change less than a full word it must read the full word modify the bits it wants with mask words then write back the full word There are two priority levels in PMAC that can write to these image words the foreground level which includes all of the motion programs and PLC 0 and the background level which includes PL
38. ssory 34 family of I O boards ACC 34x is by full 32 bit words transmitted serially even when access to only a single bit is desired the user must consider carefully how the interface is done and how frequently Care must also be taken to work efficiently with the data so that PMAC is not bogged down with slow serial reads and writes and time consuming logic to assemble and disassemble I O words The recommended strategy is to keep images of each input or output word in PMAC s internal memory or in the dual ported RAM The input words are copied into their image words and the output words are copied from their image words Most program operations deal with these image words this way slow transfer to or from an ACC 34x board is performed less frequently During the act of copying bit inversion can also be performed with the exclusive or function Processing ACC 34x Inputs amp Outputs 11 12 Accessory 34A Processing ACC 34x Inputs amp Outputs Accessory 34A WHEN TO ACCESS ACC 34X The actual reads and writes for an ACC 34x board can only be done in a background PLC program PLC 1 31 or through on line commands which are executed between PLC programs Motion programs and PLC 0 cannot directly access this I O they can work only with the image words Reading an input word from an ACC 34x is simply a question of using the TWS form M variable for that word on the right side of an equation Usually this operation simply c
39. t set of eight output lines BOO to BO7 A separate power supply for BOO to BO7 should be brought in through this connector In the sourcing configuration this supply will be used to drive the loads on the eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA TB6 This 10 pin Terminal Block is used for the connection to the second set of eight output lines BO8 to BO15 A separate power supply for BO8 to BO15 should be brought in through this connector In the sourcing configuration this supply will be used to drive the loads on all eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA Connectors 3 Accessory 34A TB7 This 10 pin Terminal Block is used for the connection to the third set of eight output lines BO16 to BO23 A separate power supply for BO16 to BO23 should be brought in through this connector In the sourcing configuration this supply will be used to drive the loads on all the eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA TB8 This 10 pin Terminal Block is used for the connection to the fourth set of eight output lines BO24 to BO31 A separate power supply for BO24 to BO31 should be brought in through this connector In the so
40. tup writing a binary 1 turns on the corresponding open collector transistor output and this in turn switches on the output negative logic Input and Output Ports 7 Accessory 34A Multiplex Address Map Accessory 34A M VARIABLE ASSIGNMENTS There is a special format 32 bit wide M variable for reading the data from and writing the data to an ACC 34 card TWS Note This special M variable definition is implemented in PMAC s firmware with a version number equal to or higher than 1 13 In version 1 14D the TWS format was modified in its address designation field to prevent unintentional reads from an output port or unintentional writes to an input port If your PROM version is between 1 13 to 1 14C you may request a free PROM update to version 1 14D or above M constant TWS m plex Serial Thumbwheel Multiplexer M Variable Definition This command causes PMAC to define the specified M variable or range of M variables to point to a 32 bit word of input or output serially multiplexed on the thumbwheel port on an Accessory 34x board Note The individual bits of the thumbwheel port on an Accessory 34x board can not be directly assigned to an M variable Only 32 bit words ports of input or output can be accessed The address on the multiplex port specified here must match the address set by the DIP switch on the ACC 34x board The ACC 34x manual contains a table listing all of the possibilities
41. urcing configuration this supply will be used to drive the loads on all eight lines up to 800 mA maximum at 24V In the sinking configuration the current requirement from this power supply is minimal approx 70 mA TB9 This is a 2 pin terminal block used to bring in the power supply 12 24V for logic circuits on the I O side of the opto isolation circuitry For proper operation of the board this power supply must be brought in through TB9 4 Connectors Accessory 34A MULTIPLEX ADDRESS MAP Each ACC 34 occupies eight bytes of address space on the PMAC s JTHW multiplex memory space This memory space is 8 bits wide which provides the ability to daisy chain 32 256 8 ACC 34XS together or a combination of ACC 34XS ACC 18s and ACC 8D OPT7s The 5 bit DIP switch SW1 determines the address of each ACC 34X board on the allocated memory space Port A occupies the base address i e bytes 0 8 16 etc and Port B occupies the base address plus 4 i e bytes 4 12 20 etc The following table shows how SW1 should be set for one or more ACC 34X boards connected to the same PMAC Multiplex Address Map S Accessory 34A SW1 DIP Switch Setting Board Byte Port A amp Port B 5 4 3 2 1 1 ON 2 ON OFF 3 ON ON 4 OFF 5 ON ON ON 6 ON ON OFF 7 ON ON 8 ON OFF 9 ON 10 ON OFF 11 ON ON 12 OFF 13 ON 14 ON OFF 15 ON ON 16 OFF 17 ON ON 18 ON OFF 19 ON ON 20 ON OFF
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