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1747-6.8, Direct Communication Module, User Manual

1. Group 7 SLC 1 Input Image for DCM 1 Bit Number Decimal 15 14 13 12 11 10 9 8 7 6 5 4 2 1 0 Reserved for Status Word Word 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 SLC 2 Input Image for DCM 2 Bit Number Decimal 15 14 13 12 11 10 9 8 7 6 5 4 2 1 0 Reserved for Status Word Word 0 word IAE SLC 3 Input Image for DCM 3 Bit Number Decimal 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Word 0 Reserved for Status Word Word 1 Word 2 Word 3 m Supervisory SLC or PLC Processor 0 011 10 Rack 1 Group 1 Bit 10 Octal 0 021 2 Rack 2 Group 1 Bit 3 Octal 0 025 13 Rack 2 Group 5 Bit 13 Octal 1 1 1 8 Slot 1 Word 1 Bit 8 Decimal 11 13 Slot 1 Word 1 Bit 3 Decimal 1 1 3 11 Slot 2 Word 3 Bit 11 Decimal X Supervisory SLC or PLC Remote Scanner T H YH 509 SL RIO Link Distributed SLC
2. Module 4 is the last device in the logical rack A A fo loojooloojoolo ol Module 4 Configured As Bo ongoo Logical Rack Address 1 Group 6 Module Rack Size 1 4 Because Module 4 is the last RIO adapter in a logical rack shared by other adapter s SW2 switch 4 must be in the OFF position Chapter 4 Module Configuration Clear On Fault SW2 3 ATTENTION Before setting SW2 3 to ON make sure that holding all DCM input bits in their last state in the event a communication error occurs does not create an unsafe condition in the distributed SLC processor Clear On Fault SW2 3 Yes OFF No ON Turn switch to OFF position if you want the DCM to clear and hold clear all data bits in its input image table in the event of an RIO communication failure or when the supervisory processor enters Program Test Fault Mode Status bits will not be cleared Turn switch to ON position if you want the DCM to hold all input data bits in their last state when an RIO communication failure occurs or when the supervisory processor enters Program Test Fault Mode Data Rate SW2 1 and SW2 2 Data Rate SW2 1 SW2 2 Cable Length Belden 9463 57 6K baud ON ON 3048 meters 10 000 feet 115 2K baud ON OFF 1524 meters 5 000 feet OFF ON 230 4K baud 762 meters 2 500 feet OFF OFF Compliance to European Union Directives DCM Installation
3. DIP Switch Settings arte System CODTIDUIGUD dL eee ep d axe hd Image Table Configuration Table of Contents Direct Communication Module User Manual Program Listing for 5 01 8 6 Program Listing 1 515 8 9 Specifications Appendix A Electrical Specifications Environmental Specifications Network Specifications res MING serea DCM Addressing Appendix B Worksheet WY B 1 Addressing Review B PLC AUUIeSSS enri rash br B 1 SLC Addresses 1 E iii Who Should Use this Manual Purpose of this Manual Preface Preface Read this preface to familiarize yourself with the rest of the manual This preface covers the following topics e who should use this manual e the purpose of this manual terms and abbreviations e conventions used in this manual Allen Bradley support Use this manual if you are responsible for designing installing programming or troubleshooting control systems that use Allen Bradley small logic controllers You should have a basic understanding of SLC 500 products You should understand programmable c
4. Compatible Adapters Catal Extended Nuno Device Node Comments Amer Capability 1785 LT x PLC 5 15 Yes n adapter mode 1785 LT2 PLC 5 25 Yes n adapter mode 1785 LT3 PLC 5 12 Yes n adapter mode 1785 L30x PLC 5 30 Yes n adapter mode 1785 L40x PLC 5 40 Yes n adapter mode 1785 L60x PLC 5 60 Yes n adapter mode 1771 ASC Remote 1 0 Adapter Module No 1771 ASB Remote I O Adapter Module Series A and C 1 Slot I O Chassis with Integral MAA P ower Supply and Adapter 2 Slot 1 0 Chassis with Integral Power Supply and Adapter lion Plant Floor Terminal Remote 1 0 Expansion Module s 1771 RIO Remote 1 0 Interface Module No 1771 Single Point Adapter Module Yes 1771 DCM Direct Communication Module No 1778 ASB Remote 1 0 Adapter Module Yes 1747 ASB Remote 1 0 Adapter Module Yes Ina m Must be catalog number 2706 0140 Dataliner Yes 2706 ExxxxxB1 2705 xxx RediPANEL Yes 2711 PanelView Terminal Yes Remote 1 0 Adapter for 1336 AC 1336 R10 Industrial Drives Remote 1 0 Adapter for 1395 DC Ban Industrial Drives 1747 ASB SLC 500 Remote I O Adapter Yes Module Chapter 1 Overview Scanner Image Division 1 4 Extended Node Capability Both scanners and adapters can have extended node capability Extended node capability allows you to have up to 32 adapters on the RIO link using an 82 Ohm termination resistor at both ends of the RIO link for all baud rates Ex
5. toria Gedeon nd ei Sedo SPI VO Image Tables PLC to DCMISLO aaa YR RR YR nara ace X DEM SLC rai ici ctas anna Image Mapping issus sus AR RAD NA EN Module Configuration Chapter 4 DIP DIP 1 lt Starting 1 0 Group Number SW1 7 and 5 1 8 Rack Address SW1 1through SW1 6 DIP dms up PD Rack Size SW2 5 and SW2 6 an SWZ ae be wees Clear On Fault SW2 3 cael cone iia d a a eer ea Data Rate SW2 1 and 5 2 2 Table of Contents Direct Communication Module User Manual Installation and Wiring Chapter 5 Compliance to European Union Directives EMC Directive ds van Phe de DEM Installation errada ulcus cur MP Network WICIDO Programming Chapter 6 Reade RAE NA o e qos Physical Input into PLC Physical Output from SLC Physical Input into SLC Physical Output from PLC Physical Input into Both PLC and SLC Logical AND Physical Output rom SLG apo ao id da Phys
6. 15 Rung 1 increments the C5 0 every 5 12 seconds The value in the ACC is referenced to the slotthatthe DCM will send the data from starting at slot 2 S 4 CTU RUNG A Countup 2 1 8 Counter C5 0 Preset 6 5 12 Seconds Time Bit Accum 0 Chapter 8 Application Examples For rungs 2 2 through 2 5 the module number being monitored is shown above each example For each rung when SOURCE A C5 0 ACC equals the value in SOURCE B MODULE the rung moves the module number to word 1 of the DCM output file This verifies the start of the data and the module number it s coming from Then it copies the four words of analog data to the DCM output words 2 through 5 followed by the module number at word 6 to indicate the end of data Module Number Monitored 2 EQU MOV RUNG EQUAL bl MOVE 2 2 Source A C5 0 ACC Source C5 0 ACC 0 0 Source B 2 Dest Os 1 0 COPY FILE bl Source 41 2 Dest 10 1 Length MOV MOVE bo Source C5 0 ACC 0 Dest 031 6 0 Module Number Monitored 3 EQU MOV RUNG EQUAL MOVE 243 Source A C5 0 ACC Source C5a0 0 0 Source B 3 Dest 0 1 1 0 COP COPY FILE LY Source 1 Dest 0 Length Source C5 0 ACC Dest 0 1 6 8 7 Chapter 8 Application Exampl
7. SLC Rung 0 3 0 addresses bit 10 decimal U RIO Scanner s supervisory 10 processor receives bit 12 octal The RIO scanner s supervisory processor ladder logic program should use the DCM output Data Invalid bit to condition any supervisory processor outputs whose state is dependent upon valid data from the DCM distributed SLC An example of a PLC 5 processor rung that requires this conditioning 1s shown below PLC 5 Rung 1 021 1 020 0 000 SLC addresses bit 10 decimal 1 PLC receives bit 12 octal 00 12 00 This rung uses data from the DCM word 1 bit O PLC address 1 021 00 to energize a PLC 5 output bit 0 of rack 0 module group 0 It is conditioned with the Data Invalid bit By using the DCM output Data Invalid bit in this example the PLC 5 will not energize the output shown above unless the data received from the SLC DCM is valid Using the User Status Flag Bit This status bit 13 is available for your particular application It is cleared on powerup and thereafter is never operated on by the DCM After powerup this bit is only set 1 or cleared 0 by your SLC ladder logic program A typical application using this bit would be to inform the RIO scanner s supervisory processor that the SLC is disabling the slot where the DCM is located If the DCM slot is disabled while the SLC is in the Run Mode data sent to the RIO scanner will be last state data invalid Without using the User Status Flag bi
8. Procedures Unpack the module making sure that the contents include Direct Communication Module Catalog Number 1747 DCM e removable connector factory installed on module e cable tie e user manual Catalog Number 1747 NM007 If the contents are incomplete call your local Allen Bradley representative for assistance 1 Check the contents of the shipping box 1 To begin configuration of your RIO system you should know three things The manual for e which scanner is compatible with your PLC SLC controller Use the table below to selecta the scanner you scanner that is compatible with your processor The DCM is compatible with all RIO select scanners Catalog Number Description 1747 SN9 SLC Remote Scanner 1771 SN Sub 1 0 scanner for Mini PLC 2 and PLC 5 families 1772 50 SD296 Remote scanner distribution panel for PLC 2 family 1775 S4A S4B S5 1 0 scanner programmer interface module for PLC 39 family 1775 SR SR5 Remote scanner distribution panel for PLC 3 10 family 1785 L11B PLC 5 11 in scanner mode 1785 LT x PLC 5 15 in scanner mode 1785 L20B PLC 5 20 in scanner mode 1785 1 2 PLC 5 25 in scanner mode 1785 L30x PLC 5 30 in scanner mode 1785 L40x PLC 5 40 in scanner mode 1785 L60x PLC 5 60 in scanner mode 5250 RS 9 Remote scanner for PLC 5 250 6008 5912 IBM PC 1 0 Scanner Module 6008 SV VMEbus Scanner Module 6008 SOH1 5QH2 Q bus 1 0
9. electrical specifications 1 EMC Directive 5 1 environmental specifications A 1 equipment needed 2 4 errors troubleshooting 7 2 European Union Directives Compliance 5 1 Examine If Open instruction XIO 6 0 6 10 examples basic DCM application 8 4 programming 6 2 status word bit application 6 1 supplementary DCM application 8 4 extended node capabili of scanners and adapter of the DCM 1 4 specification 2 4 5 3 F FAULT LED 1 1 flashing LED 7 2 front label 1 full rack 2 4 4 G getting started 2 1 sre glossary terms P 4 green LED troubleshooting using 7 4 H hardware features 1 1 cable tie slots 1 1 COMM LEDI DIP switches 1 1 FAULT LED 1 1 front side and door labels 1 1 RIO link connecto self locking a hardware overview 1 1 hardware features 1 1 Bs in status word applications humidity rating A 1 0 Group SW1 7 and SW1 8 4 4 1 0 group address 3 4 1 0 image tables 3 4 image division configuration scannel 1 3 image mapping 3 3 inserting the cable 5 2 installation getting started 2 4 installing the module 5 1 L labels front side and door 1 1 ladder logic instructions addressing 3 1 Last Rack SW2 4 4 6 LEDs 7 1 blinking 7 1 MM green 7 2 FAULT cok steady state 7 link wiring 5 2 logical group 1 4 Logical OR bif 6 5 6 6 6 14 logical rack 1 4 logical specifications 1 2 M manuals
10. 00 08 00 Logical Or Status Bit Chapter 6 Programming Physical Input into First SLC Physical Output from Second SLC For this example the second SLC has a logical PLC rack address of 3 and an SLC slot address of 4 PLC with RIO scanner Fist DCM RIO DCM Second Input gt SLC gt lt c SIC Output Processor Processor I 2 0 0 3 1 1 4 1 1 4 0 0 1 0 SLC IN Dt Kk qe C OUT 00 00 00 08 00 ue Logical Or Status Bit 2081 020 02084 PLC E 1 No physical input into the PLC 00 10 a o i 00 Logical Or Status Bit When transmitting data from a PLC to an SLC if the Clear On Fault CLR ON FLT is active switch is OFF the instruction to examine the Logical OR bit of the status word can be omitted as long as clearing the DCM input image table puts SLC outputs into a safe state for the specific application 6 4 Status Words Bit Number Decimal Chapter 6 Programming The first word of the DCM I O image is the status word The status word indicates the status of communication and data between the RIO scanner and the DCM Depending on what logical rack size the DCM is configured for it will transfer the following number of I O words Rack Size Number of RIO Words Transferred Total Words 1 4 Logical R
11. ATTENTION Never install remove or wire Chaptef 5 modules with power applied to the chassis or Installation and devices wired to the module Wiring Review SLC DCM power requirements to ensure your SLC power supply has adequate reserve power Make sure system power is off then insert the DCM into your 1746 chassis In this example procedure local slot 1 is selected Module Release A Cable Tie Chapter 2 Quick Start for Experienced Users To wire the network a 1 2 watt terminating resistor must be attached across line 1 and line 2 of the connectors at each end scanner and last physical device of the network The size of the resistor depends on the baud rate and extended node capability as shown below Maximum Cable Distance a Baud Rate Belden 9463 Resistor Size i 57 6K baud 3048 meters 10 000 feet ET TE sing Extended 115 baud 1524 meters 5 000 feet ili B B Gold Capability 230 4 baud 762 meters 2 500 feet FEED DES 57 6K baud 3048 meters 10 000 feet 1500 1 2 Watt Not Using 115 2K baud 1524 meters 5 000 feet Brown Green Brown Gold Extended Node 820 1 2 Watt Capabilit pability 230 4K baud 762 meters 2 500 feet Gray Red Black Gold 6 Enter your ladder program Chapted6 Programming Define the application requirements Write and enter the ladder logic program Chapel Application Examples 7 Go through the system
12. wy Allen Bradley Direct Communication User Pon Manual Cat No 1747 DCM Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment Safety Guidelines for the Application Installation and Maintenance of Solid State Controls Publication SGI 1 1 describes some important differences between solid state equipment and hard wired electromechanical devices Because of this difference and also because of the wide variety of uses for solid state equipment all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable In no event will the Allen Bradley Company be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment The examples and diagrams in this manual are included solely for illustrative purposes Because of the many variables and requirements associated with any particular installation the Allen Bradley Company cannot assume responsibility or liability for actual use based on the examples and diagrams No patent liability is assumed by Allen Bradley Company with respect to use of information circuits equipment or software described in this manual Reproduction of the contents of this manual in whole or in part without written permission of the Allen Bradley Company is prohibited Throu
13. Rack 2 Group 5 Rack 2 Group 6 Rack 2 Group 7 Word 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 Word 8 Word 9 Word 10 Word 11 Word 12 Word 13 Word 14 Word 15 Word 16 Word 17 Word 18 Word 19 Word 20 Word 21 Word 22 Word 23 Chapter 1 Overview Scanner Image Division Configuration Example The example presented here can help you configure your RIO Refer to it as necessaty architecture The following figure shows how a portion of a scanner s input image table might be configured An output image table would be identically configured Device 1 Full logical rack Device 2 3 4 logical rack Device 3 1 4 logical rack Device 4 1 2 logical rack Device 5 1 2 logical rack Important The configured image size of a DCM cannot cross logical rack boundaries it cannot use a portion of rack 0 and a portion of rack 1 1 5 Chapter 1 Overview Data Exchange Between RIO Scanners and the DCM Processor Scan O Supervisory PLC or SLC IS Information is transferred between the RIO scanner and the DCM every RIO scan RIO transmissions are asynchronous to the processor scans Important The DCM provides word integrity on all words transferred via the SLC backplane The DCM communicates with supervisory PLC or SLC co
14. User Status Flag bil 6 6 4 W wiring the network 5 3 word address 3 3 worksheets B Rockwell Automation Allen Bradley a Rockwell Automation Business has been helping its customers improve productivity and quality for more than 90 years We design manufacture and support a broad Allen Bradley range of automation products worldwide They include logic processors power and motion control devices operator interfaces sensors and a variety of software Rockwell is one of the world s leading technology companies Worldwide representation M Argentina e Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China PRC e Colombia e Costa Rica e Croatia e Cyprus e Czech Republic e Denmark e Ecuador e Egypt e El Salvador e Finland e France e Germany e Greece e Guatemala e Honduras e Hong Kong Hungary e Iceland e India e Indonesia e Ireland Israel e Italy Jamaica e J e Jordan e Korea e Kuwait e Lebanon Malaysia e Mexico e Netherlands New Zealand e Norway e Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico e Qatar e Romania Russia CIS e Saudi Arabia e Singapore e Slovakia e Slovenia e South Africa Republic e Spain e Sweden e Switzerland e Taiwan e Thailand e Turkey e United Arab Emirates e United Kingdom e United States e Uruguay e Venezuela e Yugoslavia Allen Bradley Headquarters 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 38
15. Word 5 Word 5 Word 6 Word 6 Word 7 Word 7 0 011 10 1 1 8 HA A O Output Input 01 Logical Rack 1 Physical DCM Slot 1 Logical 1 0 Group 1 10 Bit octal 8 Bit decimal DCM SLC to PLC DCM SLC configuration Logical Rack Address 1 Logical 1 0 Group 0 Physical Slot Number 1 Full Logical Rack PLC Input Image Table lt DCM Output Image Table SLC Output Image Table Decimal 15 14 13 1211 10 9 8 7 6 5 4 3 21 1 0 Octal 17 16 15 1413 121110 7 6 5 4 3 2 0 Decimal 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Decimal 15 14 13 12 11 10 9 8 7 6 5 4 3 210 Status Word Word 0 Status Word Word 0 Reserved Status Word Word 1 Word 1 Word 2 Word 2 Word 3 Word 3 Word 4 Word 4 Word 5 Word 5 Word 6 A Word 6 A Word 7 Word 7 DA QR 6 2 O 1 6 2 A A l l O Output 01 Logical Rack 1 Physical DCM Slot 6 Logical 1 0 Group 6 Word 2 Bit octal 2 Bit decimal 3 4 Image Mapping Chapter 3 Addressing An image map is a diagram showing how the scanner image is mapped into the image of multip
16. related P 2 Module Rack Size SW2 5 and SW2 6 4 4 module release 5 2 network specifications 1 network wiring 5 3 physical specifications 1 2 PLC addresses 3 2 LEE 1 0 group address 3 2 rack address 3 2 Index Direct Communication Module User Manual PLC scanner output imagd 3 3 6 power up system 2 4 Program Test F ault Mode bt 6 H 6 6 6 7 programming examples 6 2 physical input into both PLC and SLC physical output from 510 6 3 physical input into first SLC physical output from second SLC 6 4 physical input into PLC physical output from SLC 6 2 hysical input into SLC physical output i from UU iu i programming overview 6 publications related 7 R rack address 3 2 Rack Address SW1 1 through SW1 6 4 3 rack size number of data words transferred according to 2 3 recording 1 0 addressed B red LED troubleshooting using 7 remote 1 0 1 7 communications link 1 4 link connector 1 1 removing the module 5 4 required tools and equipment 2 1 resistor baud rate 2 4 RIO adapter 1 2 RIO communications link 1 2 RIO link connector 1 RIO scanner status word bit examination decimal 6 3 Communications Error bit 6 4 DCM initialization big 6 5 Logical OR of other status word bits 6 3 Program Test F ault Mode bit 6 3 RIO scanners 2 2 S scanner image division 1 4 logical groups 1 4 logical racks 1 4 s
17. 4 2 Analog Output 4 point 1746 NO4I 1 DCM 1747 DCM Image Table Configuration Output Image 15 14 13 12 1 10 9 8 7 6 5 4 3 2 1 0 0 1 0 Status Word to PLC 5 from SLC 0 11 Counter ACC word denotes module being read 0 12 Word 0 of analog module being read 0 1 3 Word 1 of analog module being read 0 14 Word 2 of analog module being read 0 15 Word 3 of analog module being read 0 1 6 Counter ACC word denotes module being read 0 17 Notused 0 40 041 word 0 0 41 NO4I word 1 0 42 4 word 2 0 43 041 word 3 0 5 0 041 word 0 0 5 1 4 word 1 NOAI 0 52 4 word 2 0 5 3 041 word 3 Chapter 8 Application Examples Input Image 15 14 131121111 10987654321 10 Status Word to SLC from PLC 5 11 Notused 12 Not used 13 Not used BEN 14 Notused 15 Notused 1 6 Notused 17 Notused 2 0 word 0 2 1 NI4 word 1 22 NI4 word 2 2 3 word 3 3 0 word 0 3 1 word 1 3 2 word 2 3 3 word 3 Program Listing for 5 01 Processor File MULTPLX1 ACH Rung 0 sets the starting point of the C5 0 counter This is done on the first scan of the program S 1 15 first scan bit and C5 0 DN done of the counter ensuring that only the analog modules in slots 2 through 5 are read C5 0 MOV MOVE E E 2 0 DN Source 2 Dest ESO 5 1
18. Address PLC Output Address 1 023 10 0 017 10 Input O Output 02 Logical Rack 01 Logical Rack 3 1 0 Group 7 1 0 Group 10 Bit octal 10 Bit octal SLC Addresses SLC Input Address SLC Output Address 1 2 3 8 0 1 7 8 Input O Output 2 Physical Slot 1 Physical Slot 3 Word 7 Word 8 Bit decimal 8 Bit decimal If you configure the as Then Including the Status Word 1 data word 16 bits of 1 0 14 data is transferred otal transfer 2 words 3 data words 48 bits of I O DF 1 2 Rack data are transferred otal transfer 4 words 5 data words 80 bits of I O Pc 3 4 Rack data are transferred otal transfer 6 words 7 data words 112 bits of 1 0 NR Full Rack data are transferred otal transfer 8 words Appendix B DCM Addressing Worksheet DCM u me Table Rer Sa Sos Wor __ 14 Logical Rack 1 2 Logical Rack O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O Continued on next page Appendix B DCM Addressing Worksheet DCM mage Table continued GOTO fear MT Ser od Bit decimal 3 4 Logical Rack Full Logical Rack
19. ON OFF OF OFF ON ON 35 35 ON OFF OF OFF ON OFF 36 36 ON OFF OF OFF OFF ON 37 37 ON OFF OF OFF OFF OFF 40 OFF ON ON ON ON ON 41 OFF ON ON ON ON OFF 42 OFF ON ON ON OFF ON 43 OFF ON ON ON OFF OFF 44 OFF ON ON OFF ON ON Continued on next page Chapter 4 Module Configuration 54 OFF ON OFF OFF ON ON 55 OFF ON OFF OFF ON OFF 56 OFF ON OFF OFF OFF ON 57 OFF ON OFF OFF OFF OFF 60 OFF OFF ON ON ON ON 61 OFF OFF ON ON ON OFF 62 OFF OFF ON ON OFF ON 63 OFF OFF ON ON OFF OFF 64 OFF OFF ON OFF ON ON 65 OFF OFF ON OFF ON OFF 66 OFF OFF ON OFF OFF ON 67 OFF OFF ON OFF OFF OFF 70 OFF OFF OFF ON ON ON 7 OFF OFF OFF ON ON OFF 72 OFF OFF OFF ON OFF ON 73 OFF OFF OFF ON OFF OFF 74 OFF OFF OFF OFF ON ON 15 OFF OFF OFF OFF ON OFF 76 OFF OFF OFF OFF OFF ON 77 77 77 71 71 71 71 71 eserved Chapter 4 Module Configuration DIP Switch 2 Settings Rack Size SW2 5 and SW2 6 The logical rack size allocates image space in the scanner for each DCMs I O data The DCM allows 1 4 1 2 3 4 and full rack addressing SW2 switches 5 and 6 define the rack size Rack Size SW2 5 1 4 Logical Rack ON ON 1 2 Logical Rack ON OFF 3 4 Logical Rack OFF ON Full Logical Rack OFF OFF Important The DCM image cannot cross logical rack boundaries Ther
20. Processor 1 DCM 1 N A 55 ojo o a Distributed SLC Processor 2 Distributed SLC Processor 3 N A on 0000 Module 1 As Rack Address 1 VO Group 0 Slot Number 1 Rack Size Full Module 2 Configured As Rack Address 2 VO Group 0 Slot Number 1 Rack Size 1 4 DCM 3 Module 3 Configured As Rack Address 2 VO Group 2 Slot Number 2 Rack Size 1 2 DIP Switches DIP Switch 1 Starting Group Number OM SW1 ene al El o om og ES om Rack Address mm a m W2 mM oz SW1 r A N Reserved NE P o gt Rack Size nr mm oo dastiad 3 Clear On Fault PIM ee FR Allen Data Rate 02 SW2 Chapter Module Configuration This chapter provides DIP switch setting information for the DCM Topics include e DIP switches e DIP switch 1 settings DIP switch 2 settings To configure the DCM for your application you must set the DIP switches These switches enable the DCM to properly interpret the RIO system addressing The DCM has two banks of DIP switches mounted on its circuit board Each bank contains eight switches The default set
21. Scanner Module Extended node capability Revision D or later Rev 3 or later Extended node capability not available with Series A Rev 3 or later PLC 5 15 Series B Revision or later have partial rack addressing Earlier versions are limited to 3 devices PLC 5 25 Series A Revision D or later have partial rack addressing Earlier versions are limited to 7 devices Chapter 2 Quick Start for Experienced Users e the maximum number of physical devices and logical racks your scanner supports the logical rack size of each DCM This depends on how many data words you need to transfer The first word is always the status word The table below shows the number of data words transferred relative to the rack size Ifyou configure the DCMas Then Including the Status Word _ 1 4 Rack nn 2 Total transfer 2 words 1 2 Rack 3 mo 0 Total transfer 4 words 3 4 Rack EHE 0 Total transfer 6 words Full Rack l poe dedu Total transfer 8 words 3 Choose the type of slot addressing you will use Reference yf Select DCM addressing A configuration worksheet is included in appendi B jo assist you in DCM a 2 image table addressing Aopen DCM Worksheet 4 Configure the module using the DIP switches Reference Chaptel 4 Configure your system by setting the DIP switches Module Configuration 5 Insert the 1747 DCM module into the chassis Reference
22. chassis or any SLC 500 Modular Programmable Controller to a supervisory Allen Bradley Programmable Controller via the RIO Link thereby providing a distributed processing system The DCM occupies one slot in any SLC 500 chassis Self Locking Tab Side Label A DIP Switches DCM FAULT COMM ON CONFIGURATION _ RACK ADDR 56 amo CUBE 00000000 RACK SIZE 1 4 1 2 3 4 1 FIRST I O GROUP 0 2 4 6 DATA RATE K 8 5 57 6 115 2 2304 IT 5 Self Locking Tab Hardware Features Hardware Function FAULT LED Displays operating status COMM LED Displays communication status Front Side and Door Labels Provide module configuration information RIO Link Connector Provides physical connection to RIO network Cable Tie Slots Secure and route wiring from module DIP Switches Establish configuration parameters for the module Self Locking Tabs Secure module in chassis slot 1 1 Chapter 1 Overview System Overview The Direct Communication Module is an SLC 500 family Remote I O RIO adapter It allows supervisory processors such as PLC 5s and distributed SLC 500 processors residing on an Allen Bradley RIO Communication Link to transfer data between each other The DCM appears as an RIO adapter to e a PLC
23. start up procedure Power up your system by performing standard start up procedures as indicated in your processor manual No special start up procedures are required when using the DCM module 2 4 Addressing Ladder Logic Instructions Chapter Addressing This chapter provides general information about how to address supervisory PLC and distributed SLC ladder logic instructions It also illustrates image mapping and provides an example of how a PLC output image is mapped into an SLC input image All PLC and SLC processors use 3 part addresses These three parts include logical rack or physical slot address e logical group or word address bitaddress PLC processors use the octal number system for bit addressing SLC processors use the decimal number system for bit addressing PLC Processors Scanners Address By SLC Processors Address By Logical Rack PLC scanner input and output Physical Slot The slot address is determined images are organized in logical by what slot number you place racks which consist of eight your DCM SLC slots are groups numbered 0 30 The rack address does not need to The slot address does not need match the SLC slot address to match the PLC rack address Logical Group There are eight logical groups per Word One word is 16 bits in size The logical rack numbered 0 7 One number of words used in input group consists of one input and one and output images vari
24. the Program Test Fault Mode bit 1 3 0 9 in the example below This assumes an SLC output is being driven by an input 1 3 1 0 from the scanner to the DCM as shown below DCM Conditional Program Test Fault SLC SLC Rung I 3 1 1 3 0 0 1 0 to Monitor E 1 E 9 RIO Scanner Status Bit 09 00 09 00 Input Status Bit Output If you want to clear the DCM s entire input image data from the RIO scanner when the RIO scanner s supervisory processor is in Program Test Fault Mode you can set the DCM Clear On Fault DIP switch to the OFF position Please refer to chapter 4 Module Configuration for more information on this DIP switch DCM SLC Output Status Word Using the Data Invalid Bit Whenever the distributed SLC leaves Program Test Fault Mode and enters Run Mode there is a time period after the Program Test Fault Mode bit is cleared when the data sent from the DCM SLC to the RIO scanner is invalid For this reason the Program Test Fault Mode bit should be used by the RIO scanner s supervisory processor to determine the validity of data sent from the DCM Instead both processors programs should use the DCM output Data Invalid bit 12 octal Chapter 6 Programming 6 8 To ensure that the DCM output Data Invalid bit is cleared signifying to the RIO scanner s supervisory processor that data is valid the SLC ladder logic rung shown below must be included as the ast rung in your SLC ladder logic program
25. 0 products You must e understand electronic process control beable to interpret the ladder logic instructions for generating the electronic signals that control your application Because it is a start up guide for experienced users this chapter does not contain detailed explanations about the procedures listed It does however reference other chapters in this book where you can get more detailed information It also references other documentation that may be helpful if you are unfamiliar with programming techniques or system installation requirements If you have any questions or are unfamiliar with the terms used or concepts presented in the procedural steps always read the referenced chapters and other recommended documentation before trying to apply the information This chapter tells you what tools and equipment you need lists preliminary considerations describes when to address configure and program the module explains how to install and wire the module discusses system power up procedures Required Tools and Have the following tools and equipment ready Equipment medium blade screwdriver 2 1 2 watt terminating resistors See chapterl5 Installation and Wiring for correct size programming equipment All programming examples shown in this manual demonstrate the use of Allen Bradley s Advanced Programming Software APS for personal computers Chapter 2 Quick Start for Experienced Users
26. 000 feet hois 115 2K baud 1524 meters 5 000 feet Capability 230 4K baud 762 meters 2 500 feet 820 1 2 Watt Appendix A Specifications Throughput Timing Use the following steps to determine the maximum throughput time in your application 1 Determine and record the PLC and SLC delay by following these instructions PLC SLC 1 0 circuit delay 1 0 scan time Program scan time PLC Delay SLC Delay 2 Record the remote I O delay Remote I O delay 3 Record the DCM delay This should be 10 msec DCM delay 4 Using your recorded values above determine the maximum throughput time for your application as shown below PLC Delay Remote l O delay DCM delay SLC Delay Maximum throughput time Directions Addressing Review Appendix DCM Addressing Worksheet This appendix provides a worksheet for keeping track of the elements of each VO address for your system s Topics include e directions addressing review In the table on the next page enter the elements of each I O address for each DCM in your system All DCM inputs and outputs are addressed with respect to the SLC Make sufficient copies of this worksheet to cover all DCMs in your system PLC Addresses PLC Input
27. 2 2000 Fax 1 414 382 4444 Publication 1747 6 8 J une 1996 40072 032 01 A Supersedes Publication 1747 NM007 September 1993 Copyright 1996 Allen Bradley Company Inc Printed in USA
28. Chapter Installation and Wiring This chapter explains how to install the DCM into the SLC chassis and provides information about terminal wiring Topics include e DCM installation network wiring If this product has the CE mark it is approved for installation within the European Union and EEA regions It has been designed and tested to meet the following directives EMC Directive This product is tested to meet Council Directive 89 336 EEC Electromagnetic Compatibility EMC and the following standards in whole or in part documented in a technical construction file e EN 50081 2 EMC Generic Emission Standard Part 2 Industrial Environment e EN 50082 2 EMC Generic Immunity Standard Part 2 Industrial Environment This product is intended for use in an industrial environment Installation procedures for this module are the same as for any other discrete VO or specialty module Refer to the illustration on pagel5 2 io identify chassis and module components listed in the procedures below ATTENTION Disconnect power before attempting to install remove or wire the DCM Important Make sure you have set the DIP switches properly before installing the DCM Before installation make sure your modular SLC power supply has adeguate reserve current capacity The DCM reguires 360mA 5 volts Each Fixed SLC 500 controller can support up to one DCM in a 2 slot expansion chassis depending on which I O module is in t
29. O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O Appendix B DCM Addressing Worksheet DCM m ne Table Fak Sur Wed 1 4 Logical Rack 1 2 Logical Rack 9999 9999 9999999 2 2 2 2 222 99 9 9 Continued on next page B 4 Appendix B DCM Addressing Worksheet DCM Output moe Table continued IT Rack Som sur Bit decimal 3 4 Logical Rack Full Logical Rack 9999 9999 9999999999929 999 2 2 9 9 9 9 o Index Direct Communication Module User Manual Numbers 1 2 rack 2 4 4 1 4 rack 2 3 4 d 3 4 rack 2 4 8 A adapter 1 4 extended node capabili interaction with scanners 1 2 on RIO link as slave device 1 2 adapter image 1 4 addressing ne instructions 3 1 PLC addresses 3 2 SLC addresses 3 3 addressing worksheet directions B Allen Bradley P 4 contacting for assistance P 4 application examples basic DCM 8 1 programming 6 2 supplementary DCM 8 4 using status word bits 6 7 applications using status word bits 6 7 Data Invalid bit in the SLC Status Word Logical OR bil 6 19 Program Test Fault Mode bitin the RIO scann
30. ack One plus one Status Word 2 1 2 Logical Rack Three plus one Status Word 4 3 4 Logical Rack Five plus one Status Word 6 Full Logical Rack Seven plus one Status Word 8 The figure below shows how I O bits are transferred from the scanner to two DCMs each configured as a 1 2 logical rack device 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Status Word wordo NX nn DCM 1 Data Words wora2 1 2 Rack Device Word 3 Status Word words MANT EA Word 5 DCM 2 Data Words worae 1 2 Rack Device Word 7 R Reserved for future use RIO Scanner Input Status Word Examination Decimal This is the input status word sent in a data transfer from a supervisory processor RIO scanner to a DCM These bits can be used as conditional logic in your SLC program to flag DCM RIO or supervisory processor system errors and or status Scanner status bits not defined below are reserved for future use 2 3 n 9 8 Reserved Bits Status Bits Logical OR of other Status Word bits It is set when any other bit is set Itis cleared when all other bits are cleared Program Test Fault Mode bit This bit is set whenever the Supervisory processor is in the Program Test or Fault Mode DCM Initialization bi
31. ack Size Group 4 Word 4 1 2 Rack Group 5 Word 5 Starting Group 6 Group 6 Word 6 5 W O AD DCM 3 Rack Size Group 7 Word 7 1 4 Rack In the above image map example selecting 1 0 Group Number 2 instructs the scanner to address Word 2 as the beginning of DCM 2 image In this example a half rack is selected for 2 using SW2 switches 5 and Since Word 215 the firstword assigned it becomes the Status Word Chapter 4 Module Configuration Rack Address SW1 1 through SW1 6 The rack address refers to the logical rack number from the scanner image that contains a particular DCMs image The table on page 44 gives the switch settings that define possible rack address choices for all scanners To use this table first determine which of the following categories applies to your scanner PLC 2 mini PLCs PLC 2 30 with 1772 SD SD2 remote scanner PLC 3 and PLC 5 250 processors This category includes those with built in scanners as well as the following without built in scanners catalog numbers 1775 54A 54B S5 SR SR5 and 5250 RS PLC 5 11 PLC 5 15 PLC 5 20 PLC 5 25 PLC 5 30 PLC 5 40 or PLC 5 60 and 1771 SN This category includes all smaller in rack processors and standalone scanners that have local and remote I O and begin rack addressing at rack 1 SLC 5 02 or above with 1747 SN scanner After determining which category applies to your DCM application Find th
32. appendix A DCM clear on fault DIP switch chapter 6 Table of Contents Direct Communication Module User Manual Preface Who Should Use this Manual Purpose OF this A Contents of this Manual Related Documentation Terms and Abbreviations Common Techniques Used in this Manual Allen Bradley SUN POM sii cascode Local Product reges ox Technical Product Assistance Your Questions or Comments on this Overview Chapter 1 Hardware Overview System Overview What 5 a Remote 1 0 Adapter Extended Node Capability Scanner Image Division Scanner Image Division Configuration Example Data Exchange Between RIO Scanners and DCM Whatls the Status Word Quick Start Chapter 2 for Experienced Users Required Tools and Equipment 2 qu a qur ace d a E esc Ro E 2 2 Addressing Chapter 3 Addressing Ladder Logic Instructions PLE Scanner
33. ation Examples 8 2 DCM configuration RackAddress 1 Group 0 Baud Rate 57 6K baud ClearOn Fault no Last Rack no Rack Size 1 4 DIP Switch Settings Switch 1 Switch 2 12345 6 ON 8102345061708 OFF X System Configuration for Rack 1 Amount Device Catalog Number 1 Power Supply 1746 P2 1 SLC 5 02 Processor 1747 1524 1 4 SlotRack 1746 44 1 AC Input 16 Inputs 1746 1416 1 Relay Output 16 Outputs 1746 0W16 1 Scanner 1747 SN System Configuration for Rack 2 Amount Device Catalog Number Power Supply 1746 P2 1 SLC 5 01 Processor 1747 1511 1 4 Slot Rack 1746 A4 1 Relay Output 16 Outputs 1746 0W16 1 DCM 1747 DCM Chapter 8 Application Examples Image Table Configuration Output Image 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 SN 0310 000 0 0 0 0 0 0 0 0 0 0 0 0 Input Image 15 14 13112 11 10 9 8 7 6 5 4 3 2 1 DCM 110 0 0 Program Listing When 1 1 0 15 set enabling O 3 1 0 in the SN output image the data 15 sent to the input image of the DCM I 1 1 0 The output in rack 2 is then set to output module O 2 0 Rack 1 Program 1 pid 0 3 1 1 E 5 From Inpu
34. aud Rates Terminating Resistor Size Maximum Cable Distance Belden 9463 10 000 feet at 57 6K baud 820 1 2 Watt 5 000 feet at 115 2K baud 2 500 feet at 230 4K baud Not Using Extended Node Capability DCM FAULT COMM m CONFIGURATION RACK ADDR RACK SIZE 1 4 12 3 4 1 FIRST 1 0 GROUP 0 2 4 6 DATA RATE K B S 57 6 1152 2304 1747 DCM 57 6K baud 1500 1 2 Watt 3048 meters 10 000 feet 115 2K baud 1500 1 2 Watt 1524 meters 5 000 feet AA 230 4 baud RIO Scanner 1747 DCM Direct Communication Module 1747 DCM Direct Communication Module 820 1 2 Watt Line 1 Blue Shield Shield Line 2 Clear gt gt Line 1 Blue Shield Shield Line 2 Clear Line 1 Blue Shield Shield Line 2 Clear 762 meters 2 500 feet Terminating d Resistor 4 Terminating Resistor 53 Overview Chapter Programming This chapter shows you how to program ladder logic in the supervisory processor scanner and the distributed SLC to transfer data via the DCM Topics include e overview e programming examples e status words applications using status word bits Both the supervisory processor scanner and the distributed SLC transfer data to and from the DCM aut
35. canner image division 1 4 configuration example 1 5 scanners number of physical and logical devices supported b selection 2 2 self locking tabs 1 setting the DIP switches 4 4 side label 1 1 SLC addresses 3 3 bit address 3 3 slot address 3 3 word address 3 3 SLC input imagd 3 3 6 slot address 3 3 specifications 1 cable distanc 2 electrical A 1 environmenta 5 1 network 1 resistor 5124 2 1 temperature and humidi Start up instructions 2 1 status words 1 6 6 4 about the 1 4 DCM status word bit examination octal RIO scanner status word bit examination decimal 6 3 supplementary DCM application example Address 4 3 SW1 7 and SW1 8 DIP switch 1 0 Group Z SW2 1 and SW2 2 DIP switch Data Rate SW2 3 DIP switch Clear On Fault 4 7 SW2 4 DIP switch Last Rack 4 8 SW1 1 SW1 6 DIP switch Rack 14 Index Direct Communication Module User Manual SW2 5 and SW2 6 DIP switch Module Rack Size 4 4 system overview 1 4 data exchange between a PLC and SLC 1 2 logical rack 1 4 remote 1 0 analysis 1 2 restriction factors 1 2 system powerup 2 4 temperature specifications A 1 operating storage 1 terminating resistor size of 5 3 terms P 3 throughput timing A 4 tools needed 2 1 troubleshooting 7 1 contacting Allen Bradley P 4 using the COMM LED green 7 2 using the FAULT LED red 7 1 U
36. e column for the scanner used in your application Go down the column to the rack address that you assigned to the DCM Use the switch settings in the right most columns of the table that correspond to your rack address 43 Chapter 4 Module Configuration 4 4 Use this table to set SW1 switches 1 through 6 Logical Rack Number Octal Switch Number SW1 1747 PLC PLC PLC E 3 4 5 6 SN 2 3 5 15 5 25 5 40 5 60 5 250 0 1 0 0 ON ON ON ON ON ON 1 2 1 1 1 1 1 1 ON ON ON ON ON OFF 2 3 2 2 2 2 2 2 ON ON ON ON OFF ON 3 4 3 3 3 3 3 3 ON ON ON ON OFF OFF 5 4 4 4 4 4 ON ON ON OFF ON ON 6 5 5 5 5 5 ON ON ON OFF ON OFF 7 6 6 6 6 6 ON ON ON OFF OFF ON 7 1 7 7 7 ON ON ON OFF OFF OFF 0 0 0 0 ON ON OF ON ON ON 1 1 1 1 ON ON OF ON ON OFF 2 2 2 2 ON ON OF ON OFF ON 3 3 3 3 ON ON OF ON OFF OFF 4 4 4 4 ON ON OF OFF ON ON 5 5 5 5 ON ON OF OFF ON OFF 6 6 6 6 ON ON OF OFF OFF ON 7 7 7 7 ON ON OF OFF OFF OFF 20 20 20 ON OFF ON ON ON ON 21 21 21 ON OFF ON ON ON OFF 22 22 22 ON OFF ON ON OFF ON 23 23 23 ON OFF ON ON OFF OFF 24 24 24 ON OFF ON OFF ON ON 25 25 25 ON OFF ON OFF ON OFF 26 26 26 ON OFF ON OFF OFF ON 27 27 27 ON OFF ON OFF OFF OFF 30 30 ON OFF OF ON ON ON 31 31 ON OFF OF ON ON OFF 32 32 ON OFF OF ON OFF ON 33 33 ON OFF OF ON OFF OFF 34 34
37. e required to perform each task of the overall process is reduced in comparison to a single processor system Therefore overall program or process performance is typically better Inhibit A function by which the scanner stops communicating with a logical device The logical device will consider itself inhibited if it does not receive communications from the scanner within a certain period of time Logical Device Any portion of a logical rack assigned to a single adapter Logical Group A logical group consists of one input and one output word within a logical rack A word consists of 16 bits each bit represents one terminal on a discrete I O module Also referred to as an I O Group Logical Rack A fixed section of the scanner image comprised of eight input words and eight output words Also referred to as a rack Logical Slot A logical slot consists of one input and one output byte within a logical group A byte consists of 8 bits each bit represents one terminal on a discrete I O module Physical Device The number of devices that the supervisory processor scanner will support PLC Chassis A physical PLC Programmable Logic Controller rack that houses PLC processors and 1771 I O modules Common Techniques Used in this Manual Preface Rack Size The logical rack size of the DCM image RIO Link Remote Input Output Refers to an Allen Bradley communication system supporting high speed serial t
38. efore as an example configuring the module for 1 2 logical rack with starting group 6 will cause a configuration error Refer to Starting I O Group Number on dal Last Rack SW2 4 Switch 4 of SW2 must be set to the OFF position if the DCM shares its logical rack with at least one other adapter and has been assigned the highest VO group number in that logical rack Last Rack SW2 4 Yes OFF No ON Direct Communications Module 1 L Remote I O Scanner Module 1 Configured As E Logical Rack Address 1 a VO Group 0 Module Rack Size 1 4 E A El SLC Output Image to the PLC Ta Is alaolasfaale oja o Module 2 Configured As Decimal 15 1413 12 1110 9 8 7 6 5 4 3 2 1 0 Logical Rack Address 1 Bit Number VO Group 2 Octal 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 Module Rack Size 1 4 Module 1 Group 0 Word 0 2215 Group 1 Word 1 Group 2 Word 2 Module 2 i Logical Group 3 Word 3 D Rack 1 Group 4 Word 4 Ta hoa oo cooo Module 3 Configured As Module 3 Group 5 Word 5 HEALE Logical Rack Address 1 Group 6 Word 6 VO Group 4 Module 4 2 Module Rack Size 1 4 Group 7 Word 7
39. er status word User Status Flag bit in the SLC Status Word 6 8 available scanners 2 2 backplane current consumption A 1 basic DCM application example 8 1 baud colza resistor 2 4 specifications 2 H 5 1 Belden 9463 cable maximum distance 2 4 bit address 3 2 3 3 C cable distance maximurp 2 5 3 1 cable tie slots 1 1 5 2 CE certification 5 4 chassis slot rd gui 2 MEME Clear On Fault Sw2 3 4 7 COMM LED 1 1 Communication Error bit 6 3 configuring the moduld 4 contacting Allen Bradley for assistance P 4 contents of manual P 2 D Data Invalid bit 6 7 Data Rate SW2 1 and SW2 2 4 7 DCM features 1 1 hardware 1 1 cable tie slots 1 1 COMM LED 1 1 DIP switches 1 1 FAULT LED 1 1 front side and door labels 1 1 self locking tabs 1 DCM Initialization bif 6 3 DCM installation and wiring 5 1 DCM Output Data Invalid bil 6 4 DCM overview 1 DCM status word bit examination decimal DCM output data invalid big 6 6 User Status Flag 6 4 definitions P 3 determining maximum throughput time 7 DIP switches 1 4 1 switch 1 settings 4 2 1 0 Group SW1 7 and SW1 8 4 2 Rack Addresses SW1 1 through SW1 6 4 3 switch 2 settings 4 4 Clear On Fault SW2 3 4 7 Data Rate SW2 1 and SW2 2 4 7 Last Rack SW2 4 4 4 Module Rack Size SW2 5 and SW2 6 door labe 1 1 1 2 Index Direct Communication Module User Manual E
40. es Module Number Monitored 4 EQU MOV RUNG EQUAL 2 4 Source 5 0 Source C5r0 ACC 0 0 Source B 4 Dest 0 1 1 0 COP COPY FILE Source 1 4 0 Dest 0 1 2 Length 4 MOV MOVE Source c5 0 ACC 0 Dest 0 1 6 0 Module Number Monitored 5 EQU MOV RUNG EQUAL MOVE 2 5 Source A C5 0 ACC Source C5 0 ACC 0 0 Source B 9 Dest 031 1 0 COP COPY FILE Source 1 5 0 Dest 0 1 2 Length 4 MOV MOVE Source C520 ACC 0 Dest 0 1 6 0 lt END gt RUNG RUNG RUNG RUNG Module Number Monitored 2 Program Listing for PLC5 15 Chapter 8 Application Examples The following examples are for rungs 2 0 through 2 3 The module number being monitored is shown above the examples For each rung the first EQU monitors the module number and the start of the data transfer while the second EQU monitors the module number and the end of the data transfer The COP then moves the four words of analog data to an integer file EQU EQU EQUAL EQUAL Source A 1 011 Source A 1 016 0 0 Source 2 Source B 2 Module Number Monitored 3 EQU EQU EQUAL EQUAL Source A 1 011 Source A 1 016 0 0 Source 3 Source B 3 Module Number Moni
41. es output word Each word is made according to how many you up of 16 bits specify in your setup Words are numbered consecutively beginning with 0 The group number does not need The word number does not need to match the SLC word address to match the PLC group number Bit PLC bits are numbered octally from Bit SLC bits are numbered 0 to 7 and 10 to 17 decimally from 0 15 The bit number does not need to The bit number does not need to match the SLC bit number match the PLC bit number because SLCs use decimal because PLCs use octal however the position of the bit in however the position of the bit in the word must be the same the word must be the same Om 00 0 Group 1 Word 1 Group 2 Word 2 Logical Group 3 Word 3 Physical Rack Group 4 Word 4 Slot 5 Word 5 6 Word 6 Group 7 Word 7 Chapter 3 Addressing 3 2 PLC Scanner Addresses The three parts of the PLC address include the e logical rack logical group group e bit PLC Input Address PLC Output Address 1 023 10 0 017 10 Input O Output 02 Logical Rack 01 Logical Rack 3 1 0 Group 7 1 0 Group 10 Bit octal 10 Bit octal The rack address refers to the logical rack assigned to the DCM in the PLC scanner I O image table It is selected using switches 1 through 6 of SW1 on the DCM Thi
42. esent the 30 possible slots in an SLC system S2 11 0 represents slot 0 up through S2 12 14 which represents slot 30 S2 12 15 is unused After programming the SLC to set and clear the User Status Flag bit this bit can be used to condition any PLC 5 output in this example whose state is dependent upon the data from the distributed SLC being valid PLC 5 Rung 1 021 1 020 0 000 1 C6 00 13 00 The PLC 5 rung uses data from the DCM word 1 bit 0 to energize PLC 5 output 0 It is conditioned on the User Status Flag bit being cleared If the SLC is programmed to set the User Status Flag bit prior to disabling the DCM slot the PLC 5 will never energize output O when data from the SLC is invalid For more information on how to enter PLC ladder logic see your PLC 5 programming manual 6 9 Chapter 6 Programming RIO Scanner Input Status and DCM SLC Output Status Using the Logical OR Bit Whenever any of the status word bits except the User Status Flag bit are set the Logical OR bit is set Using an Examine If Open XIO instruction examining the Logical OR bit word 0 bit 8 for SLC word 0 bit 10 for PLC 5 in your ladder logic you could inhibit any outputs or processors when this bit is set SLC Rung 123 1 1 3 0 0 1 0 to Monitor 4 1 4 C PLC 5 Status Bit 08 00 08 00 Troubleshooting Chapter This chapter shows you how to identify and correct errors that you may encounter using LEDs The topic
43. full rack and is located in SLC physical slot 3 Physical Slot 0 1 2 3 4 5 6 Physical Input into PLC Physical Output from SLC PLC RIO RIO DCM osc Input Processor Scanner lt gt Processor Output IN 1 000 J f J E i PLC 00 00 i 1 3 1 3 0 SLC lu jp 0 OUT 00 08 In the example above PLC output O 021 00 controls the on off status of DCM input I 3 1 00 I 3 1 00 is used as a conditional ladder logic along with the Logical OR input status bit to control SLC output O 1 0 00 6 2 Chapter 6 Programming Physical Input into SLC Physical Output from PLC SLC DCM RIO RIO PLC Input Processor gt Scanner Processor Output 1 2 0 0 3 1 SLC IN C 00 00 1 021 1 020 0 001 PLC 1 1 E C OUT 00 10 00 Logical Or Status Bit Physical Input into Both PLC and SLC Logical AND Physical Output from SLC PLC RIO RIO DCM Input Input gt Processor mi Scanner Processor Output 1 000 0 021 IN E PLC 00 1 2 0 1 3 1 1 3 0 0 1 0 SLC IN 1 1 2 C OUT 00
44. ghout this manual we use notes to make you aware of safety considerations ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death property damage or economic loss Attentions help you e identify a hazard e avoid the hazard recognize the consequences Important Identifies information that is especially important for successful application and understanding of the product PLC PLC 2 PLC 3 and PLC S are registered trademarks of Allen Bradley Company Inc SLC SLC 500 Dataliner Panel View RediPANEL PLC 5 11 PLC 5 15 PLC 5 20 PLC 5 12 PLC 5 25 PLC 5 30 PLC 5 40 PLC 5 60 are trademarks of Allen Bradley Company Inc IBM is a registered trademark of International Business Machines Incorporated Summary of Changes Summary of Changes The information below summarizes the changes to this manual since the last printing as 1747 NM007 September 1993 To help you find new information and updated information in this release of the manual we have included change bars as shown to the right of this paragraph New Information The table below lists sections that document new features and additional information about existing features and shows where to find this new information For This New Information See Related documentation updated preface Quick Start for Experienced Users chapter 2 Default DIP switch settings chapter 4 CE certification chapter 5
45. he second slot Refer to the Discrete I O Modules Product Data Publication Number 1746 2 35 Chapter 5 Installation and Wiring Installation 1 Disconnect power 2 Align the full sized circuit board with the chassis card guides The first slot slot 0 of the first rack 15 reserved for the CPU 3 Slide the module into the chassis until the top and bottom latches are latched 4 Attach the RIO link cable to the connector on the front of the module behind the door 5 Insert the cable tie in the slots 6 Route the cable down and away from module securing it with the cable tie 7 Cover all unused slots with the Card Slot Filler Catalog Number 1746 N2 IN amp gt IN SS SS Module Release N aa Card Guide N 19627 Cable Tie Removal 1 Disconnect power 2 Press the releases at the top and bottom of the module and slide the module out of the chassis slot 3 Cover all unused slots with the Card Slot Filler Catalog Number 1746 N2 5 2 Network Wiring RIO Link Connector Using Extended Node Capability Baud Rate Chapter 5 Installation and Wiring A 1 2 watt terminating resistor must be attached across line 1 and line 2 of the connectors at each end scanner and last physical device of the network The size of the resistor depends upon the baud rate and extended node capability as shown below All B
46. ical Input into First SLC Physical Outputfrom Second SLC SIMS WOM eu rones Ges bg ved da RIO Scanner Input Status Word Examination Decimal DCM SLC Output Status Word Examination Octal Applications Using 1 0 Status Word RIO Scanner Status WOM y Sad vo RES b taria Using the Program Test Fault Mode Bit DCM SLC Output Status Word Using the Data Invalid Using the User Status Flag Bit RIO Scanner Input Status and DCM SLC Output Status Using me Blair aora Troubleshooting Chapter 7 DEM Status Indicators Troubleshooting Using the FAULT LED Troubleshooting Using the COMM LED Application Examples Chapter 8 Basic ecu PT 1747 SN Module Configuration DIP Switch Settings System Configuration 1 System Configuration 2 Image Table Configuration Program LISUNg cabins Supplementary Example Module Configuration
47. ion Always use the DCM Output Data Invalid bit to determine the validity of SLC data sent from the DCM to the scanner If you use the Program Test Fault Mode bit you may incorrectly receive an indication that the SLC data being sent from the DCM to the scanner is valid This occurs because for a brief period after the Program Test Fault mode bit is cleared the data sent from the DCM to the scanner will not be valid Chapter 6 Programming Applications Using Status You can use the status bits in your ladder logic to monitor various conditions Word Bits of the remote processor and the RIO network Some examples for using the status word bits are given here Each of the examples shows how ladder logic rungs could be programmed in the SLC processor to respond to the condition of a status bit from the RIO scanner Important The application examples assume the portion of the scanner image assigned to the DCM is logical rack 2 starting group 0 1 full rack and is located in SLC physical slot 3 RIO Scanner Status Word Using the Program Test Fault Mode Bit When the RIO scanner s supervisory processor is in Program Test or Fault Mode its outputs are automatically inhibited reset off unless Hold Last State is used However outputs sent to the DCM DCM inputs are not automatically inhibited If you want to inhibit any SLC output controlled by a DCM input you can use an Examine If Open XIO instruction addressed to
48. ions Troubleshooting Describes troubleshooting using front panel LEDs gt E Application Examples Provides and examines both basic and supplementary applications Appendif Specifications Provides module and system specifications and discusses throughput Appendix B DCM Addressing Worksheet Helps you to work out the image table configuration for DCMs in your system Preface Related Documentation The following documents contain additional information concerning Allen Bradley SLC and PLC products To obtain a copy contact your local Allen Bradley office or distributor For Read This Document Document Number An overview of the SLC 500 family of products SLC 500 System Overview 1747 2 30 A description on how to install and use your Fixed SLC 500 Installation amp Operation Manual for Fixed Hardware 1747 6 21 programmable controller Style Programmable Controllers A description on how to install and use your Modular SLC 500 Installation amp Operation Manual for Modular 1747 6 2 programmable controller Hardware Style Programmable Controllers A reference manual that contains information regarding the use of PLC Reference Instruction Set 1785 6 1 the PLC 59 programmable controller A procedural manual for technical personnel who use APS to Rockwell Software Advanced P rogramming e 9399 APSUM develop control applications Software APS User Ma
49. le adapters The following table and illustration show how an example PLC output image is mapped into the image of multiple SLC processors through the DCM PLC Scanner Output Image To DCM SLC Input Image 0 011 10 Starting Group 0 5 1 1 1 1 8 Rack 01 Group 1 Bit 10 octal Slot 1 Word 1 Bit 8 decimal 0 021 3 Starting Group 0 gt 2 1 1 1 3 Rack 02 Group 1 Bit 3 octal Slot 1 Word 1 Bit 3 decimal 0 025 13 Starting Group 2 2 3 1 2 3 11 Rack 02 Group 5 Bit 13 octal Slot 2 Word 3 Bit 11 decimal Each row in the table represents the address of a data bit being transferred from the PLC scanner output image to the SLC input image via three different DCMs The figure on the next page illustrates this data transfer Appendix B contains a Worksheet designed to help you work out your system addressing Use it if necessary to record I O addresses 3 5 Chapter 3 Addressing 3 6 Scanner Output Image _ Decimal 15 14 13 121110 9 8 7 6 5 4 3 2 Bit Number octal 17 1615 14 13 1211 10 7 6 5 4 3 2 1 1 0 0 Reserved for Status Word Group 0 Group 1 Group 2 Group 3 DCM 1 Group 4 Group 5 Group 6 Group 7 Group 0 Reserved for Status Word DCM 2 Group 1 Group 2 Reserved for Status Word Group 3 DCM 3 Group 4 Group 5 Group 6
50. ntrollers through RIO scanners as if they were addressing a logical rack However the DCM does not scan the I O in its local I O chassis rather it passes the supervisory data to the distributed SLC processor In the DCM outputs from the SLC output image table are inputs to the supervisory processor input image table Likewise outputs from the supervisory processor output image table are inputs to the SLC input image table The diagram that follows depicts the communications flow between an RIO scanner and the DCM Distributed Processor Scan SLC Distributed Processor DCM Module Module ss Nas RIO Scan Outputs from PLC Input Data to DCM 1 6 SLC Expansion lt Chassis Inputs to PLC Output Data from DCM Outputs from Modules E Output Device Input Device What Is the Status Word The first word of the DCM input and output image is the status word The status word indicates the status of communication and data between the RIO scanner and the DCM For more information on status words and their applications see chapter 6 Programming Chapter Quick Start for Experienced Users This chapter helps you to get started using the Direct Communication Module DCM We base the procedures here on the assumption that you have a basic understanding of 51 50
51. nual A reference manual that contains status file data and instruction y 5 set information for the SLC 500 processors and MicroLogix 1000 1747 6 15 Reference Manual controllers Information regarding the use of the 1747 SN SLC RIO scanner Remote 1 0 Scanner User Manual 1747 6 6 An introduction to APS for first time users containing basic concepts but focusing on simple tasks and exercises and allowing Quick Start for New Users 9399 APSQS the reader to begin programming in the shortest time possible SLC 500 Software Programmer s Quick Reference A training and quick reference guide to APS Guide available on PASSPORT ata list price of ABT 1747 TSG001 50 00 SLC 500 Common Procedures Guide available on A common procedures guide to APS PASSPORT ata list price of 50 00 ABT 1747 TS 50 A procedural and reference manual for technical personnel who Allen Bradley Hand Held Terminal User Manual 1747 NP002 use an HHT to develop control applications An introduction to HHT for first time users containing basic concepts but focusing on simple tasks and exercises and allowing Getting Started Guide for HHT 1747 NM009 the reader to begin programming in the shortest time possible Published by the National Fire An article on wire sizes and types for grounding electrical National Electrical Code Protection equipment d Association of Boston MA A complete listing of current Allen Bradley documentati
52. omatically via their I O and the RIO scan The DCM as a common memory site for both supervisory and distributed processors has two addresses one for the supervisory processor scanner and one for the SLC The supervisory processor scanner address is the DCM logical rack address as set by DCM SW 1 switches 1 through 6 The distributed SLC address is determined by the slot where the DCM is physically installed The supervisory processor scanner and distributed SLC addresses can be different however the bit position part in each word must be the same In the programming examples on the following page an Examine If Open contact similar to the one shown below is used in each output rung 1 4 0 08 This instruction checks that the Logical OR bit of the status word is false Whenever any of the status word bits except the User Status Flag bit 15 set it is indication that a condition has occurred in your logic program that may require inspection If this happens you would normally want to inhibit some outputs by using a ladder logic instruction Using an Examine If Open XIO instruction examining the Logical OR bit word 0 bit 8 for SLC word 0 bit 10 for PLC is the easiest way of doing this Chapter 6 Programming Programming Examples The following programming examples are typical of applications using the DCM In each example the portion of the scanner image assigned to the DCM is logical rack 2 starting group 0 1
53. on including ordering instructions Also indicates whether the Allen Bradley Publication Index SD499 documents are available on CD ROM or in multi languages A glossary of industrial automation terms and abbreviations Allen Bradley Industrial Automation Glossary 7 1 P 3 Preface Terms and Abbreviations P 4 The following terms and abbreviations are specific to this product For a complete listing of Allen Bradley terminology refer to the Allen Bradley Industrial Automation Glossary Publication Number ICCG 7 1 Adapter Any physical device that is a slave on the RIO link Adapter Image The portion of scanner image assigned to an individual adapter You configure the adapter image by assigning it a starting logical rack number starting logical group number and the number of logical groups it uses In the case of the DCM this is referred to as the DCM image DCM Refers to the Direct Communication Module Distributed Control Controller Refers to a control system that employs a number of different hardware controllers processors each designed to perform a different subtask on behalf of an overall program or process In a single processor non distributed system each task would be done by the single processor controlling the process In a distributed system each task is targeted to the specific processor required to perform its needs Since all processors run simultaneously and independently the tim
54. ontrollers and be able to interpret the ladder logic instructions required to control your application If you do not contact your local Allen Bradley representative for information on available training courses before using this product If using Advanced Programming Software APS we recommend that you review The APS Quick Start for New Users Publication 9399 APSQS This manual is a reference guide for the Direct Communication Module DCM It describes the procedures you use to address configure and program the DCM for application with PLCs and SLCs Preface P 2 Contents of this Manual for Experienced Users Chapter Title Content Describes the purpose background and scope of Preface this manual Also specifies the audience for whom this manual is intended Provides a hardware and system overview including Overview physical features system communication scanner image division and communications flow Quick Start Serves as a Quick Start Guide for using the DCM Addressing Explains slot numbering and image mapping Module Configuration Provides DIP switch setting information E Installation and Wiring Provides installation procedures and a wiring diagram 5 Programming Shows how to program ladder logic in the PLC and the SLC 500 including an examination of special programming instructions that affect system response Also examines the status word and its applicat
55. processor with integral RIO scanner on the RIO Communication Link e an RIO scanner Catalog Number 1771 SN or 1747 SN on the RIO Communication Link RIO Scanner Distributed SLCs with D M 1 Supervisory PLC or SLC DCMs adapters A PanelView adapter ch El DCM 3 RIO Communication Link 0000 DCM modules connected in a daisy chain configuration using Belden 9463 cable What Is a Remote 1 0 Adapter A remote I O adapter RIO adapter is any module that acts as a slave to an RIO scanner the master on the RIO link The DCM is an RIO adapter All RIO scanners have defined physical and logical specifications Physical specifications are the maximum number of adapters that can be connected to the scanner See Extended Node Capability on page 1 4 Logical specifications are the maximum number of logical racks the scanner can address the ways logical racks can be assigned and the ability of the scanner to perform block transfers Refer to the appropriate scanner manual for details concerning physical and logical specifications The DCM can physically reside on the RIO link with any other adapter The following table lists the adapters available for use with an RIO link 1 2 Chapter 1 Overview
56. ransfer of Remote I O RIO control information Scanner The communication master on the RIO link Scanner Image The data table area within the scanner used to exchange information between the scanner and all the adapters on the RIO link The scanner image is a portion of the SLC or PLC processor image Slave In a communication link a station that cannot initiate communication SLC Chassis A physical SLC Small Logic Controller rack that houses SLC processors and 1746 and 1747 I O modules Slot The physical location in any chassis used to insert I O or specialty modules Supervisory Control Controller A control system whereby a host supervisory controller processor monitors and intermittently adjusts control parameters as necessary of one or several lower level processors while the lower level processor s performs the control task continuously in real time The following conventions are used throughout this manual Bulleted lists such as this one provide information not procedural steps Numbered lists provide sequential steps or hierarchical information e Italic type is used for emphasis P 5 Preface Allen Bradley Support P 6 Allen Bradley offers support services worldwide with over 75 Sales Support Offices 512 authorized Distributors and 260 authorized Systems Integrators located throughout the United States alone plus Allen Bradley representatives in every major countr
57. s address does not need to match the physical slot address of the DCM Complete information about DIP switch selection is in chapter 4 Module Configuration The I O group address refers to the word in the PLC scanner image table that contains the referenced I O data bit The I O group address does not need to match the word address of the SLC I O instruction The bit address is the bit within the word being addressed Bits are numbered 0 17 octal for the PLC and 0 15 decimal for the SLC The physical position of the bit in the PLC word must match the position of the bit in the SLC word to address the correct bit Chapter 3 Addressing SLC Addresses The three parts of the SLC address include the e physical slot e word e bit SLC Input Address SLC Output Address 1 2 3 8 1 7 8 Input O z Output 2 Physical Slot 1 Physical Slot 3 Word 7 Word 8 Bit decimal 8 Bit decimal The slot address refers to the physical slot 1 30 in the modular SLC chassis or fixed SLC expansion chassis where the DCM is installed This address does not need to match the logical rack address of the PLC I O instruction The word address refers to the word number 0 7 of the slot being addressed The maximum number of SLC I O words that a DCM can be assigned is 8 The bit address is the bit within the word being addressed Bits are numbered 0 15 decimal for the SLC and 0 17 octal for the PLC Outputs from
58. s include e DCM status indicators e troubleshooting using the FAULT LED red e troubleshooting using the COMM LED green DCM Status Indicators Two LEDs indicate the status of the DCM Troubleshooting Using the FAULT LED Red If LED is On FAULT m COMM Green Cause Internal Fault Corrective action Cycle power to the chassis containing the DCM Replace DCM if red LED remains lit after powerup Blinking Configuration Error Check that the DIP switch settings are correct Make sure that O group and rack size settings are compatible Also see that the setting for rack address is correct Refer to chaptef 4 M odule Configuration for help with DIP switches Off Normal State No action required 9 The DCM cannot cross logical rack boundaries Therefore as an example configuring the module for 1 2 logical rack with starting group 6 will cause a configuration error Chapter 7 Troubleshooting Troubleshooting Using the COMM LED Green rack inhibited If LED is Cause Corrective action On Normal State No action required T MO YT O Check for RIO scanner s processor error correct Blinking in Program Test Fault Mode condition and cycle power to DCM RIO scanner s processor Check thatthe scanner is properly installed in rack RIO not connected to scanner scanner s processor 2 3 Ott RIO scanner s processor Check RIO scanner
59. s processor rack integrity correct any problem and cycle power to No communication between RIO scanner s processor and DCM Check that the baud rate of the DCM matches the baud rate of the scanner Check cable connections from the RIO scanner s processor or scanner to the Check that the DCM connector is properly installed Chapter Application Examples This chapter provides and examines two applications of the DCM e basic example supplementary example Basic Example In the following application the 1747 DCM in the remote rack 2 will monitor the 1747 SN data from the local rack 1 The program examples in both local and remote rack CPUs consist of 1 rung each When input I 1 0 is enabled in the local rack the output O 3 1 0 condition is transferred to the 1747 DCM input image via the 1747 SN output image This condition enables O 2 0 in the remote rack output card Rack 1 Rack 2 VA Input S witch Belden 9463 1747 SN Module Configuration Baud Rate 57 6K baud G file Size 3 words G File 15 14113 12 11 1098765430210 Word 0 Reserved mm Starting Address 0 Word2 0 0 0 0 0 0 0 0 0 10 0 rm 1 4 Rack Size See SN manual for further details on configuration 8 1 Chapter 8 Applic
60. t This bitis set when the DCM is in its power up initialization It will be cleared when valid data is received from the supervisory processor output image table Communication Error bit This bit is set whenever the DCM detects an RIO communication error Itis cleared when the Communication error is cleared 65 Chapter 6 Programming DCM SLC Output Status Word Examination Octal This 15 the output image status word sent in a data transfer from a DCM to a supervisory processor scanner These bits can be used as conditional logic in your supervisory processor program to flag DCM or SLC system errors and or status DCM SLC status bits not defined below are reserved for future use Both the decimal and octal bit addresses are shown below to assist you in programming your supervisory PLC processor and distributed SLC processor se OLE 722 v 12 Reserved Bits Status Bits A Logical OR of Status Word bits 11 and 12 9 and 10 for SLC Itis set when either 11 or 12 9 or i is set Itis cleared when 11 or 12 9 or 10 is cleared Program Test Fault Mode bit This bitis set whenever the SLC controlling the DCM is in the Program Test or Fault Mode DCM Output Data Invalid bit This bitis set when DCM output image data could be invalid User Status Flag bit This status bit is available for you to use in your applicat
61. t no indication that data is not being updated would be sent to the RIO scanner that is neither the Program Test Fault Mode bit nor the Invalid Data bit would be set If your SLC ladder logic program sets the User Status Flag bit prior to disabling the DCM slot the supervisory processor can use this bit in its ladder logic where appropriate ATTENTION Make certain that you have thoroughly examined the effects of disabling the DCM slot before doing so in your application An example of how rungs might be programmed in the two processors to indicate disabling of the DCM slot is shown on the next page Chapter 6 Programming SLC Rungs User Status Flag Bit mm o 08130 Set User Status Flag Bt Condition 5 gt TI IOM IMMEDIATE OUT w MASK Slot 0 3 0 Mask 0800 O 52 11 Disable DCM Condition 5 U 03 52 11 Enable DCM Condition s L 03 o O 3 0 Clear User Status Flag Bit Condition U o 11 o Condition s to set User Status Flag bit is the same condition s to disable the DCM slot When setting the User Status Flag bit an Immediate IOM instruction must be used 9 Condition s to clear User Status Flag bit is the same condition s to enable the DCM slot 9 The SLC addresses this bit as bit 11 decimal the PLC 5 receives this bit as bit 13 octal amp 52 11 52 12 These two words are bit mapped to repr
62. t Switch To SN Output Word 1 Bit 0 Rack 2 Program 2 Ted 0 2 L From Input Word 1 Bit 0 Chapter 8 Application Examples Supplementary Example 8 4 In the following application the PLC 5 15 via its integrated RIO scanner and the DCM will monitor the analog data from an SLC 500 This case is unique in that the data to be monitored is twice what the DCM can transfer The program in the SLC 500 will multiplex the data into four 4 word packets with a start and end of data word attached The start and end of data word 15 also used to designate which module the data is coming from This 1s also used by the PLC 5 15 to indicate that the data was transferred successfully RIO slot not used Belden 9463 Module Configuration PLC 5 configuration for scanner I O status inhibit bits 27 0 27 1 0 5 27 2 1 5 273 1 Don tcare DCM configuration Rack Address 1 1 0 Group 0 Baud Rate 57 6K baud Clear on Faults No Last Rack No Rack Size Full Rack Chapter 8 Application Examples DIP Switch Settings Switch 1 Switch 2 12462345678 ON XI X x X X OFF X x System Configuration Amount Device Catalog Number EE Power Supply 1746 P2 1 SLC 5 01 Processor 1747 1511 1 7 Slot Rack 1746 A7 2 Analog Input 4 point 1746
63. tended node capability can only be used if the scanner and all adapters on the RIO link have extended node capability The DCM has extended node capability The scanner allows each adapter to use a fixed amount user defined of its input and output image The scanner image is divided into logical racks and further divided into logical groups A full logical rack consists of eight input and eight output image words A logical group consists of one input and one output word in a logical rack Each logical group is assigned a number from 0 7 The number of racks available for data and I O transfer depends on the scanner you are using Local I O Logical Rack 0 Logical Rack 1 Remote I O Scanner Image Logical Rack 2 gt Logical Group 0 Logical Rack 3 Logical Group 7 Processor 1 0 Image Scanner Image Adapter Image The scanner image also contains the image of each adapter on the RIO link The adapter is assigned a portion of the scanner image which is referred to as the adapter image Logical Rack 0 Logical Rack 1 Logical Rack 2 Decimal Bit Number Octal Bit Number Rack 0 Group 0 Rack 0 Group 1 Rack 0 Group 2 Rack 0 Group 3 Rack 0 Group 4 Rack 0 Group 5 Rack 0 Group 6 Rack 0 Group 7 Rack 1 Group 0 Rack 1 Group 1 Rack 1 Group 2 Rack 1 Group 3 Rack 1 Group 4 Rack 1 Group 5 Rack 1 Group 6 Rack 1 Group 7 Rack 2 Group 0 Rack 2 Group 1 Rack 2 Group 2 Rack 2 Group 3 Rack 2 Group 4
64. the SLC output image are inputs to the supervisory processor input image table Likewise outputs from the supervisory processor output image table are inputs to the SLC image table As noted if the supervisory processor is a PLC the I O image bits are octal and SLC bits are decimal While the addresses are different the position of the bit in the SLC word must match the position of the bit in the PLC word The following diagrams show this relationship 3 3 Chapter 3 Addressing I O Image Tables PLC to DCM SLC DCM SLC configuration Logical Rack Address 1 Logical 1 0 Group 0 Physical Slot Number 1 Full Logical Rack PLC Output Image Table gt DCM Input Image Table gt SLC Input Image Table Decimal 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Octal 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0 Decimal 15 14 13 1211 10 9 8 7 6 5 4 3 2 1 0 Decimal 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Reserved for Status Word Word 0 Status Word Word 0 Status Word A Word 1 A Word 1 u 1 Word 2 Word 2 Word 3 Word 3 Word 4 Word 4
65. tings are shown below Chapter 4 Module Configuration DIP Switch 1 Settings Starting Group Number SW1 7 and SW1 8 The starting I O group number is the first word assigned to the DCM from the scanner s image table The starting I O group number must be an even number from 0 to 6 and is dependent upon whether the DCM has been configured as a full 3 4 1 2 or 1 4 rack The first word transferred is always the status word for the DCM _ RackSiee Number of RIO Words Transferred TotalWords lMlogialRack 1 Status and 1 Data 2 1 2 Logical Rack 1 Status and 3 Data 4 3 4 Logical Rack 1 Status and 5 Data 6 Full Logical Rack 1 Status and 7 Data 8 Reference the table below to set the starting I O group number Starting Group Number SWi 7 51 8 Valid Rack Configuration _ 0 ON ON All 2 ON OFF 3 4 1 2 1 4 4 OFF ON 1 2 1 4 6 OFF OFF 1 4 Example of different starting groups BitNumber Octal 17 16 15 14 13 12 11 10 7 6 5 4 3 2 0 Decimal 15 14 13 1211 10 9 87 6 5 4 8 2 0 Starting Group 0 Group 0 Word 0 SI TI AT US W O R 5 DCM 1 Rack Size Group 1 Word 1 1 4 Rack Starting Group 2 Group 2 Word 2 si TAI SAO AO Group 3 Word 3 DCM 2 R
66. tored 4 EQU EQU EQUAL EQUAL Source A 1 011 Source A 1 016 0 0 Source B 4 Source B 4 Module Number Monitored 5 EQU EQU EQUAL EQUAL Source A 1 011 Source A 1 016 0 0 Source 5 Source 5 lt END gt COP COPY FILE Source 1 012 Dest N7 0 Length 4 COP COPY FILE Source 1 012 Dest N7 4 Length 4 Source 1 012 Dest N7 8 Length 4 COP COPY FILE Source 1 012 Dest N7 12 Length 4 8 9 Appendix Specifications This appendix provides the following module and system specifications e electrical specifications e environmental specifications e network specifications It also discusses throughput time for the DCM Electrical Specifications Backplane Current Consumption 360mA at 5V Environmental Specifications Operating Temperature 09C to 60 329F to 1409F Storage Temperature 409C to 85 C 409F to 185 F Humidity Rating 5 to 95 noncondensing Agency Certification eCSA certified when product or packaging is marked eCSA Class Division 2 Groups A B C D certified eUL listed eCE marked for all applicable directives Network Specifications Baud Rate Resistor Size 57 6K baud 10 000 feet at 57 6K baud 115 2 baud 5 000 feet at 115 2K baud 820 1 2 Watt 230 4K baud 2 500 feet at 230 4K baud Not Usin 57 6K baud 3048 meters 10
67. y in the world Local Product Support Contact your local Allen Bradley representative for e sales and order support e product technical training e warranty support e support service agreements Technical Product Assistance If you need to contact Allen Bradley for technical assistance please review the information in the Troubleshooting chapter first Then call your local Allen Bradley representative Your Questions or Comments on this Manual If you find a problem with this manual please notify us of it on the enclosed Publication Problem Report If you have any suggestions for how this manual could be made more useful to you please contact us at the address below Allen Bradley Company Inc Automation Group Technical Communication Dept 602V T122 P O Box 2086 Milwaukee WI 53201 2086 Hardware Overview FAULT LED Rea COMM LED Green Door Label 55 Front Label RIO Link Connector Cable Tie Slots 1747 DCM E Chapter Overview This chapter provides a hardware and system overview including physical features and connectivity illustrations It also explains data exchange between processors and discusses rack size Topics include e hardware overview system overview e scanner image division communications flow The Direct Communication Module Catalog Number 1747 DCM is used to connect an SLC 500 Fixed Programmable Controller with expansion

1747-6.8, Direct Communication Module, User Manual

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