Manual - AoteWell International Limited
Contents
1. sssssseeeeeennees 31 Redundancy Mode Off 0 33 Redundancy Mode T eiiam eene mmeennnnnnes 33 Prerequisites iuto degli ee dien be ti inis 33 Switchifng criteria aaa iet It e eee on eat des 34 Diagnostics behaviour in case of failure sese 34 Marao L EDSS oen dee idis 35 PROFIBUS diagnostics sss 36 Functional principle eese eese ener 36 SIUCIUIG iri eee rt Lg e eda td tp eme bdo ade He dd dd tud 36 Header ott te et d asi e di e cd aad 36 Status diagnostics eesssessessssesees esent nnn 39 Identifier specific diagnostics ssseeeeee 40 Channel specific diagnostics seen 40 5 Commissioning eene nine a hao anaa 43 S900 project planning using the GSD file sssssse 43 Commissioning with a master system that does not support GSD file import 44 Key features of parameterization mode 1 eesssssss 44 How to configure an S900 station in mode 1 ssuusess 44 How to parameterize a S900 station in mode 1 45 Commissioning the S900 with Composer MelogQy sessesss 46 Commissioning the S900 with AC800M sse 46 DIAGNOSTICS PEDE DUM 46 Status supervision ssssesssseseseseeseeeee entree nnne nnne 47 3BDD010422R2. Bex e to ensure explosion protection Appropriate ready made S900 field housings are available for this purpose The I O System S900 is powered via special terminals with increased safety located on the mounting termination unit The power supply units the communication interfaces and the I O modules are plugged into the mounting termination unit and locked automatically The power supply modules have a built in shut off mechanism with automatic locking and can be plugged removed under power in zone 1 although the supply in the primary circuit which is not intrinsically safe is still active in this case As a result the I O System S900 does not require an explosion proof or pressurized housing and therefore is easy to handle The mounting termination unit and the power supply unit s ensure intrinsically safe power supply of the communication interfaces and up to 16 I O modules The mounting termination unit provides all internal connections Thus only the peripheral units need to be connected by the user Also hot swapping of the communication interfaces and I O modules is possible i e these units can be connected or removed during operation This ensures easy replaceability of all active components and a high degree of flexibility and user friendliness Field instruments complying with protection class EEx ia IIC can be connected to the I O modules At present up to 16 I O modules can be run on the same mounting termination unit Each
3. A standardized data format is used to ensure vendor independent slave configuration Structure of a GSD file 20 The general structure of the GSD file is specified in EN50170 More detailed information can be obtained from he PROFIBUS user organization PNO http www profibus com The GSD files is usually provided by the vendor or is available in the Internet The file extension identifies the language Default d English e French f German g Italian i Portuguese p Spanish s At present the GSD file for S900 is available in English ABB_04D2 GSD and in German ABB_04D2 GSG Every vendor of PROFIBUS slaves delivers a GSD file for the unit This enables the user or his configuration program to eliminate possible errors resulting from wrong parameters as early as in the project planning phase The GSD file is an ASCII file and an be read with any text editor 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP C1920 proper functioning of the slave Any modification of the GSD file may cause Note that the use of the original GSD file from the vendor is mandatory for serious errors and is at the user s own risk The GSD file contains communication specific parameter like the supported transmission rate and possible parameters of the slave S900 is a so called modular slave Contrary to a compact slave a modular slave has a variable structure since it consists of s
4. If the PROFIBUS line fails the one the active Communication Interface uses to handle the user data communication with the master the active Communication Interface recognizes this fact As a consequence the two CI920 of the I O System S900 swap their PROFIBUS station addresses The previously passive Communication Interface becomes the active CI920 and vice versa Now the master tries to include the active CI920 on the redundant line in the cyclic data exchange Since the lines cannot be diagnosed during the start up period and the redundant line could also be defective the start up time is monitored by the active CI920 When the active CI920 achieves the cyclic data exchange with the master time monitoring is stopped since now the line could be monitored If the active CI920 does not achieve the cyclic data exchange with the master within the predefined start up time default setting 8 s another redundancy toggle is performed For the time used for redundancy toggling and the startup time the module outputs retain their last valid values If the cyclic data exchange could not be achieved after the first redundancy toggle the originally active CI920 sets the module outputs to the parameterized safety condition value after expiration of the startup time and after switching back to the originally active CI920 Retaining the input values during redundancy switching can only be ensured by the master system The S900 ensures that already the fir
5. adding removing or replacing I O modules without affecting the actors of I O modules that are not involved The S900 System accepts a new Check Cfg telegram while it is running When the system is re configured it leaves the DataExchange state for a short time due to PROFIBUS requirements During this time the outputs maintain their last value until returning to the DataExchange state If the online re configuration procedure cannot be terminated properly e g when the PROFIBUS communication is interrupted the outputs are set to their default values The S900 System is thus HCIR compatible without any limitations Note The non cyclic V1 services used in many PROFIBUS devices are only suitable for online re parameterization They cannot be used for modifying a slave s configuration i e its I O data setting Uninterrupted download from the S900 System is only possible if the master supports the HCIR configuration as well However many old master system versions require a reboot which of course does not allow for online re configuration Modern master systems like Symphony CMC60 or AC800F from ABB are not limited in this way and are best suited for online re configuration If the application in the PLC or OCS is to be protected against unwanted signal failures or alarms during online re configuration their engineering 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP C1920 system must ensure
6. I O modules is designed for connecting 4 or 8 field instruments depending on the respective model The I O modules and the underlying field instrument level are powered via the mounting termination unit All intrinsically safe modules are self feeding and short circuit proof No separate routing level with additional power supply and individual fusing is required HART communication in the field with all analog S900 I O modules is possible via a PC or hand held terminal In addition the special HART variants allow for a consistent HART communication up to the open control system OCS Cyclic transmission of all secondary HART variables HART diagnostics and non cyclic configuration of all HART devices are possible The S900 I O modules are slot addressed and therefore do not require any settings on the modules themselves The PROFIBUS address is either set via three coding switches or is assigned via the system The S900 communication interface the I O modules and the connected HART devices are configured and parameterized via a fieldbus network No additional network is required for this The communication interface and the 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 I O modules have built in LEDs allowing for on site diagnostics All diagnostic and status indicator LEDs comply with DIN EN 60073 and NAMUR NE44 In addition to this PROFIBUS diagnostics down to channel specific error messages
7. dee A Rn ena rte REINAR 18 GONVENTIONS 0 iat rt terrea i e d gute da reda d an TAEA a AEEA AGS 18 Setting the bus address ssssssssssseee enne 18 Factory Seting 2 ete creen teen eec i teta reet ecd e Eu cies 20 GSD generic slave data file 20 Structure of a GSD file sse 20 Module description in the S900 GSD file sess 21 Gompatibility ms aei oe hates eet e E Rae ne te eo haa 21 5 I O System S900 Communication Interface for PROFIBUS DP CI920 ee ye cere M 22 MAAN Ss d temo terat hedera ERE E Mae eie ER EARUM oe Ae 23 Behavior dace cheese vas Eo ete guida eset od testo eda d cde d es e d 23 Re configuration in online mode sse 24 ParameterizatlOn ciae cce reet bi tete e teet Ro AEREN nd MEN 25 ls ES 26 Re parameterization in online mode eene 26 Cyclic data exchange essssssssesssesseeeese entente ennt nnne ns 27 W O data transmission essent 27 Non cyclic services DPV1 ueeesessssssssssesesseeeeeene entente 28 Functional principle sse 28 1366688 o etie ea Receipt Fa dad co Y dd Ra ee 29 C2 ACCESS c 6e ccce desee dM ec det 29 Multiple aCGess 1 coit diee ec i Oe e E Rees 30 S900 andi DIM iet i te en aee sede te exi seas 30 DIAQMOSUICS ite de pinea is 30 Hedundarncy i std ctim pile idi ine RS 30 PROFIBUS line redundancy
8. is possible via the communication bus Communication Interface CI920 Functionality The communication interface connects the S900 Station to the external fieldbus The data received via the fieldbus are distributed accordingly to the respective I O modules The parameters are submitted to a plausibility check The incoming data are buffered and are available even in case of a fieldbus failure When an I O module needs to be replaced the new module can be parameterized immediately The input data and diagnostic data from the I O modules are collected and then put in the respective fieldbus data telegram Parameterization The parameters are transmitted via the internal CAN bus The transmission is triggered by events When a parameter telegram is received via the fieldbus the respective modules are parameterized immediately When the communication interface recognizes a new module that has already been integrated in the project this module is parameterized immediately Diagnostics The transmission of diagnostic data from the I O modules is triggered by events A diagnostic message is transmitted immediately via the external fieldbus Input data The input data are read cyclically from the communication interface Digital modules transmit their data every 5 ms whereas analog modules transmit 3BDD010422R0201 11 I O System S900 Communication Interface for PROFIBUS DP CI920 every 20 ms These times are independent of the cycl
9. must be parameterized accordingly for redundancy The address of the passive C1920 must be a vacant node address The PROFIBUS master must poll the passive CI920 FDL status polling Alternatively a minimum configuration can be set up for each passive C1920 This is optional and facilitates the diagnostics in the control 33 I O System S900 Communication Interface for PROFIBUS DP CI920 system The configuration is limited to a CI920 user data CIPB C so that the bus load does not increase drastically e Both PROFIBUS lines must be sufficiently isolated Polling the passive CI920 is used for monitoring the second passive bus line A Correct transmission of both CI920 s can only be monitored by the DP master If the DP master does not receive a response from the active CI920 for a request the slave handler must be reset This way the slave can detect that the DP master no longer recognizes the slave in the state Data Exchange and can react with a switching operation Otherwise the DP master would continue to transmit Data Exchange telegrams and the slave cannot detect that its own transmission function is malfunctioning Switching criteria The DP watchdog of the active CI920 responds and e the passive CI920 is ready to take over e the passive CI920 is at least in state Baud Control FDL status polling e the passive CI920 is present e the active CI920 has failed and see above Diagnostics behaviour in cas
10. x gt 1 4 x 12 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 3 System specifications Required system components The I O System S900 in its smallest hardware configuration consists of the following components 1 x TU921 Termination unit 1 x SA910 Power supply 24VDC 1 x BP901 Power supply filter 1 x CI920 Communication interface 1 x DX910 Digital I O module If required a 230 V AC 24 V DC power supply unit must be provided by the customer to ensure 24 V DC power supply of the I O System S900 Requirements on PLC OCS master systems The I O System S900 is designed for connection to all systems with a PROFIBUS DP master The PROFIBUS DP VO services provide the following functionality Configuring setting parameters of the S900 station upon re start S900 diagnostic messages Reading HART secondary variables from connected field devices Reading HART diagnostics from connected field devices through PROFIBUS diagnostic messages To be able to use the full range of functions provided by the I O System S900 the master should support additional functions Modern state of the art master systems support PROFIBUS DP V1 services and are capable of loading configuration data and parameter settings while the system is running and without affecting the slaves or requiring a network restart PROFIBUS DP V1 services allow you to e monitor the input and output data 3BDD010422R02
11. 0 Octet 2 Slot 7 Slot 6 Slot 5 Slot 4 Slot 3 Slot 2 Slot 1 Slot 0 Octet 3 Slot 15 Slot 14 Slot 13 Slot 12 Slot 11 Slot 10 Slot 9 Slot 8 Octet 4 Slot 16 Channel specific diagnostics Three bytes are provided for every channel error Only one error can be reported for one channel in a block If more than one error occur in a channel several blocks are put together 40 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 Table 4 9 Channel specific diagnostics 111 reserved Bit 7 6 5 0 Octet 1 Header Slot 10 0 16 Bit 7 6 5 0 Octet 2 1 0 Channel 00 reserved 0 8 01 input 10 output 11 input output Bit 7 5 4 0 Octet 3 Channel type Error code 000 reserved see 001 1 bit above 010 2 bit 011 4 bit 100 1 byte 101 1 word 110 2 words Error codes according to DP standard cu Mia EE EES 10 15 reserved short circuit undervoltage used for underflow overvoltage used for overflow overload overtemperature wire break high limit value exceeded low limit value fallen below error reserved 16 31 vendor specific S900 Error codes C1920 The meaning of the transmitted error codes can be different for every slot or module type of a modular slave In the case of the I O System S900 different interpretations are possible for the CI920 and for all I O modules 3BDD010422R0201 41
12. 00 data valid 01 module error 01 module error 01 module error 01 module error 10 wrong module 10 wrong module 10 wrong module 10 wrong module 11 missing module 11 missing module 11 missing module 11 missing module Octet 7 I O module 11 l O module 10 I O module 9 l O module 8 00 data valid 00 data valid 00 data valid 00 data valid 01 module error 10 wrong module 11 missing module 01 module error 10 wrong module 11 missing module 01 module error 10 wrong module 11 missing module 01 module error 10 wrong module 11 missing module 3BDD010422R0201 39 I O System S900 Communication Interface for PROFIBUS DP CI920 Octet8 I O module 15 I O module 14 I O module 13 I O module 12 00 data valid 00 data valid 00 data valid 00 data valid 01 module error 01 module error 01 module error 01 module error 10 wrong module 10 wrong module 10 wrong module 10 wrong module 11 missing module 11 missing module 11 missing module 11 missing module 7 2 1 0 Octet 9 not used I O module 16 000000 00 data valid 01 module error 10 wrong module 11 missing module Identifier specific diagnostics One bit per slot module indicates whether or not a diagnostic message exists for the respective slot Table 4 6 Identifier specific diagnostics 7 6 5 0 Octet 1 Header Length 01 000100 2 4 7 6 5 3 2 1
13. 01 13 I O System S900 Communication Interface for PROFIBUS DP CI920 e simulate force the S900 inputs outputs e configure the connected HART field devices Selective loading of configuration data and parameter settings while the system is running allows you to e modify specific parameters of the communication interface or of individual I O modules e add more S900 stations e add remove or replace S900 I O modules All I O modules whose parameter settings and configuration data are not changed continue cyclic communication As long as the master is downloading data all S900 outputs hold their states Examples for modern master systems meeting the requirements stated above are e ABB AC800F e ABB Symphony CMC60 2 CMC70 e ABB AC800M System Limits Number of PROFIBUS stations Up to 127 can be addressed within a PROFIBUS network This number includes the PROFIBUS master Up to 32 stations can be connected to a PROFIBUS DP segment When using repeaters one can separate the network into several segments Using the intrinsically safe PROFIBUS DP up to 10 stations can be connected to each segment The transmission rate and the permissible cable length specified for the segment must be observed For example a cable length of 400 m 1314ft is permissible for a network with a transmission rate of 500 kbaud Longer cables are possible when using fiber optic cables Number of I O Modules S900 can handle up to 16 I O modul
14. 0201 Symbols Oo ee 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 1 About this document This publication includes Warnings Cautions and Information issues where appropriate to point out safety related or other important information It also includes Tips to point useful hints to the reader The corresponding symbols should be interpreted as follows Warnings indicate the presence of a hazard which could result in personal injury Cautions indicate the presence of a hazard which could result in equipment or property damage Information alerts the reader to pertinent facts and conditions Special preconditions to ensure explosion protection Although Warning hazards are related to personal injury and Caution hazards are associated with equipment or property damage it should be understood that operation of damaged equipment could under certain operational conditions result in degraded process performance leading to personal injury or death Therefore comply fully with all Warning and Caution notices I O System S900 Communication Interface for PROFIBUS DP CI920 Terminology DTM Device Type Manager FDT Field Device Tool HART Highway Addressable Remote Terminal GSD Generic Slave Data DCS Distributed Control System PLC Programmable Logic Controller OCS Open Control System CIPB S900 Communication Interface C1920
15. 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP C1920 information which data is to be read or written is communicated through slots and indices The standard allows for free assignment of the data to the slots and indices However the assignment Slot Module is recommended for a modular slave like S900 Slot 0 corresponds to the communication interface A maximum of 255 slots and indices 0 254 is possible Non cyclic services can be initiated by a Class 1 or Class 2 master A Class_1 master is also cyclically exchanging data with the slave whereas a Class 2 master is only run temporarily on the PROFIBUS An example for a Class 2 master is a PC with a PROFIBUS card laptop with a PCMCIA card It can read input and output data from the slave as well as its configuration parameters and diagnostic data However it cannot change the data In general the meaning of the indices is vendor specific but the indices for some slaves are specified by the PNO German PROFIBUS user organization This specification is called a profile and is intended to standardize these indices in order to permit consistent data interpretation in units from different vendors At present such profiles are available for NC NR controllers encoders drives and HMI devices The Class 1 master is at the same time the cyclic master for the slave i e it is physically and logically the same bus station First it has to set the slave to the
16. DataExchange state to be able to use non cyclic services i e the slave first has to be parameterized and configured At present S900 does not support non cyclic C1 access The Class 2 master is not cyclically exchanging data with the slave It is logically another bus node than the Class 1 master but physically the cyclic master can at the same time have a Class 2 master functionality The cyclic communication link is maintained or monitored continuously by sending the input and output data telegrams A data link between the slave and the Class 2 master is non cyclic in the proper sense of the word i e the link must be monitored explicitly through the master and the slave 29 I O System S900 Communication Interface for PROFIBUS DP CI920 Multiple access A separate SAP Service Access Point must exist for every non cyclic link In the slave a buffer must be provided for intermediate data storage Since the memory in the slave or better said in the PROFIBUS ASIC is limited the number of possible simultaneous links is limited as well S900 provides one SAP plus buffer for the Class 1 master and one SAP plus buffer for a Class 2 master If the master attempts to set up a second link or a second Class 2 master is added the slave will cancel any further communication setup S900 and DTM Diagnostics The DTM Device Type Manager is used as the S900 configuration and parameterization tool It can be integrated in stand alo
17. I O System S900 Communication Interface for PROFIBUS DP CI920 The error codes of the CI920 have the following meaning 19 21 ROM Error RAM Error EEPROM Error reserved no CAN communication no redundant CAN communication error of power supply 1 error of power supply 2 restart upon watchdog reset message indicated for 10 seconds redundancy toggle has occurred message indicated for 10 seconds redundant C1920 is missing redundant CI920 is not ready redundant CI920 is defective no DP communication with CI920 Error Codes I O modules The error codes of the I O modules have the following meaning 19 20 21 22 23 29 30 31 42 unknown module type set configuration unknown module type actual configuration reserved implausible inconsistent parameters reserved HART status error HART error 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 5 Commissioning 900 project planning using the GSD file 3BDD010422R0201 This section can only give you a general overview of how to proceed in this case since the procedure considerably depends on the master system used Please refer to the respective reference manuals for details Systems like the ABB AC800F with its Control Builder F program provide to the user a comfortable user interface for convenient configuration and parameterization with plain text displays Other systems like COM PROFIBUS from Siemens use the
18. IT Control I O System S900 Communication Interface for PROFIBUS DP C1920 Industrial Manual enabled I O System S900 Communication Interface for PROFIBUS DP CI920 2 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 IT Control I O System S900 Communication Interface for PROFIBUS DP CI920 Firmware versions 1 5 x Manual 3BDD010422R0201 3 I O System S900 Communication Interface for PROFIBUS DP CI920 NOTICE The information in this document is subject to change without notice and should not be construed as a commitment by ABB ABB assumes no responsibility for any errors that may appear in this document In no event shall ABB liable for direct indirect special incidental or consequential damages of any nature or kind arising from the use of this document nor shall ABB be liable for incidental or consequential damages arising from use of any software or hard ware described in this document This document and parts thereof must not be reproduced or copied without written per mission from ABB and the contents thereof must not be imparted to a third party nor used for any unauthorized purpose The software or hardware described in this document is furnished under a license and may be used copied or disclosed only in accordance with the terms of such license Copyright 2003 ABB All rights reserved Release Rev A Document number 3BDD010422R0201 CE MARKING This product meets the r
19. S DP CI920 38 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Diag Sync Mode This bit is set by the DP slave as soon as the respective DP slave has received the Sync control command Diag Freeze Mode This bit is set by the DP slave as soon as the respective DP slave has received the Freeze control command Diag WD On Watchdog on This bit is set by the DP slave as soon as its watchdog control has been activated This bit is set to 1 by the DP slave Diag Stat Diag static diagnostics 1 Diag Stat_Diag static diagnostics If the DP slave sets this bit the DP master shall fetch diagnostic information as long as this bit is reset again For example the DP slave sets this bit if it is not able to provide valid user data Diag Prm Req If the DP slave sets this bit the respective DP slave shall be reparameterized and reconfigured The bit remains set until parameterization is finished This bit is set by the DP slave If bit 1 and bit O are set bit O has the higher priority Octet 3 Station status 3 The individual bits have the following meaning Bit 7 Diag Ext Diag Overflow If this bit is set there exists more diagnostic information than specified in Ext Diag Data For example the DP slave sets this bit if there are more channel diagnostics than the DP slave can enter in its send buffer or the DP master sets this bit if the DP slave sends more diagnostic information than the DP master can enter in its dia
20. S900 Communication Interface All components of the I O System S900 are available as S or N types Type A S modules can be mounted in hazardous area The following information is valid for both type N and type S components the modules are referenced without S or N e g CI920 stands for CI920S and CI920N Related Documentation Documentation Number S900 Mounting and Installation 3BDD010422 Datasheet 3BDD010420 Manual Digital O Modules DO910 and 3BDD010423 DX910 Manual Frequency Input DP910 3BDD010424 Manual Analog Inputs with HART AI930 3BDD010425 AI931 und AO930 Manual Temperature Input AI950 3BDD010426 Manual DTM for S900 FDT 1 2 3BDD010428 Manual DTM for S900 FDT 0 98 Application Guide S900 HART Protocol Parameterization in Mode 1 Parameter Overview S900 Manual GSD Parameters Mode1 Parameterization in Mode 2 Parameter Overview S900 Manual GSD Parameters Mode2 Manual CB220 3BDD010437 C1920 Release Note S900 Release Note CI920 Vx x x This manual describes operation and handling of communication interfaces with the firmware versions given on third page Actual information and latest news for specific versions are publicized by the Release Note of CI920 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP C1920 2 Introduction System features 3BDD010422R0201 I O System S900 is a rem
21. andardized parameters EN50170 and of a set of User Parameters The interpretation of the User Parameters is always vendor specific In the standardized parameter part only some simple settings need to be made to set up correct PROFIBUS communication This part is set up automatically on nearly all master systems The User Parameters are defined in the GSD file and are described in this document The first three bytes must be set constantly to 0x00 0x00 and 0x00 Check if your engineering tool does this correctly Then four bytes must be set for the CI920 The meaning of the individual bits is described in the corresponding sheets It is easier to edit the numbers in hexadecimal format but not all masters accept this In position 7 of the User Parameters the parameter data for the first I O module begins There is one sheet for every kind of module Some modules are physically equal but differ in the number of I O data This is the reason why sometimes the same module comes with two variants see AI4H Ex for example The one byte parameter is divided into two nibbles of four bits each The nibbles are called subsets Subset one which corresponds to bits 4 to 7 of the data byte consists of the error monitoring and failsafe behavior This subset is equal for each I O module First select a line which includes all requested parameters The first 3BDD010422R0201 45 I O System S900 Communication Interface for PROFIBUS DP CI920 D
22. bit to zero Diag Not_Supported This bit is set by the DP slave as soon as a function was requested which is not supported by this DP slave Diag Ext_Diag This bit is set by the DP slave It indicates that a diagnostic entry exists in the slave specific diagnostic area Ext Diag Data if the bit is set to one If the bit is set to zero a status message can exist in the slave specific diagnostic area Ext_Diag_Data The meaning of this status message depends on the application and will not be fixed in this specification Diag Cfg_Fault This bit is set by the DP slave as soon as the last received configuration data from the DP master are different from those determined by the DP slave Diag Station_Not_Ready This bit is set by the DP slave if the DP slave is not yet ready for data transfer Diag Station_Non_Existent This bit is set by the DP master if the respective DP slave can not be reached over the line If this bit is set the diagnostic bits contain the state of the last diagnostic message or the initial value The DP slave sets this bit to zero Octet 2 Station status 2 The individual bits have the following meaning Bit 7 Bit 6 Diag Deactivated This bit is set by the DP master as soon as the DP slave has been marked inactive within the DP slave parameter set and has been removed from cyclic processing The DP slave always sets this bit to zero reserved 37 I O System S900 Communication Interface for PROFIBU
23. byte calculation Configuration Input bytes Output bytes C1020 0 0 6 x AI930 6x8 0 4 x AO910 0 4x8 6 x DX910 6x2 6x1 Total 60 30 3BDD010422R0201 15 I O System S900 Communication Interface for PROFIBUS DP CI920 Cycle time Total amount of I O data bytes 60 30 90 Number of available bytes 216 90 126 Number of possible HART variables 126 4 31 The PROFIBUS master defines the transmission rate to be used within the system The internal cycle time is 5 ms for processing 128 binary signals and 20 ms for processing 64 analog signals The response time of the entire system depends upon the total amount of I O data of all PROFIBUS stations and of the processing capabilities of the higher level control system The S900 output data are synchronized with the higher level bus Therefore the internal cycle time has to be considered only once The following approximation formula is valid Tg Ti 2 x Tg Tocs with Tg response time T internal cycle time Ts fieldbus cycle time Tocs OCS cycle time With a bus cycle time of 5 ms and an OCS cycle time of 5ms the response time for 128 binary signals is Tp 5 2x5 5 20ms The following illustration gives you an overview of the expected PROFIBUS cycle time depending on the transmission rate and number of slaves The cycle time also depends on the total amount of I O data An output data amount of 20 bytes and an input data amou
24. column delivers the hexadecimal number for this subset This number is the higher order part of the byte to construct The meaning of subset two which corresponds to bits 0 to 3 of the data byte is module specific The procedure is the same as for subset one Search the line with all requested parameters and take the subset number of the first column Add this number as the lower order part to the byte to construct Only the shown subset numbers are valid all others are denied by the S900 on download Then edit this byte in the corresponding field of the master engineering tool Note that an empty slot also has one User Parameter byte which must be set to zero Commissioning the S900 with Composer Melody To commission the S900 on a Symphony Melody system the DTM is required The DTM serves the I O data mapping and the parameterization and configuration of the station All input values are processed with a status information Nevertheless the scaling of analog input values must be done manually in the input and output function blocks in the Composer e For 0 20 mA inputs use range 0 40000 0 to get 0 100 unipolar e For4 20mA inputs use range 8000 0 40000 0 to get 0 100 unipolar e For temperature inputs use range 0 0 20 0 to get K unipolar e For temperature inputs use range 5444 0 5484 0 to get C bipolar Commissioning the S900 with AC800M Diagnostics 46 S900 comes with alle requir
25. e is replaced Indicator LEDs The CI920 has five LEDs on its front panel which indicate the following states Table 4 5 CI920 LEDs LED Description 1 PW off No power supply green Power ok red Serious error e g checksum error in ROM 2 CA off CAN not used yellow CAN ready red CAN error 3 PB off Slave is waiting for parameters configuration data yellow Slave in DataExchange state red DP error outputs on failsafe red blinking Static diagnostics outputs on failsafe 4 RD off C1920 is passive yellow CI920 active yellow blink CI920 active redundant CI920 not ready 5 FD off Configuration and parameters o k red blinking Configuration or parameter error 3BDD010422R0201 35 I O System S900 Communication Interface for PROFIBUS DP CI920 PROFIBUS diagnostics Functional principle Structure cy Header 36 When the slave is in the DataExchange status it responds to the master s output data telegram with input data telegrams The slave can enter special data in the telegram header to inform the master about existing diagnostic data S900 reports all incoming and outgoing errors to the master which then fetches the diagnostic buffer data with the next telegram With a 25 ms pause between two diagnostic telegrams or messages the S900 ensures that a new buffer with changed data is only handed over to the PROFIBUS after the master has read the old b
26. e of failure The only trouble shooting procedures that may be necessary are related to configuration and parameter errors provided that the S900 modules are used properly according to the specifications S900 has special indicator LEDs allowing you to figure out errors and their possible reasons quickly A PROFIBUS diagnostic message is provided for all errors indicated locally through the LEDs When a module is replaced with an equivalent module the new module is automatically configured parameterized according to the following table Table 4 4 Data source in case of module replacement Data Source C1920 Fieldbus master Redundant C1920 Active C1920 I O module C1920 Behavior of outputs in error case 1 O module Behavior of inputs in error case Active C1920 34 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 S900 is a user friendly and easily serviceable system As you can see from the descriptions above it allows for a plug and play kind of replacement No engineering tool is required Additionally the system is provided with a simulation forcing option allowing you to perform important servicing and commissioning tasks The simulation function serves for e testing the applications in the PLC or the OCS e simulating the actors if no PLC OCS is available yet e avoiding unwanted error messages in the case of signal failures that may occur when a defective modul
27. e time specified for the external fieldbus Output data The transmission of output data is triggered by events When an output data telegram is received via the fieldbus all data are transmitted synchronously to the respective I O modules I O module monitoring The connected I O modules are monitored cyclically When a module is not found a diagnostic messages is generated For the input modules the defined default value is transmitted instead of the measured value The default valid is marked as invalid Supported I O Modules Table 2 1 Supported I O modules Type Description CI920 Version Softw Prm M 1 Prm M 2 Digital Input Output DO910 Digital output 4 x 1 channels Solenoid driver gt 1 0 x gt 1 2 x DX910 Digital input output 1 x 8 channels gt 1 0 x gt 1 2 x Analog Input Output AI910 Analog input 1 x 4 channels active gt 1 2 x gt 1 2 x AI930 Analog input 1 x 4 channels active HART gt 1 0 x gt 1 2 x A1931 Analog input 1 x 4 channels active HART gt 1 2 x gt 1 2 x AO910 Analog output 1 x 4 channels gt 1 4 x gt 1 4 x AO920 Analog output 4 x 1 channels isolated gt 1 0 x gt 1 2 x AO930 Analog output 1 x 4 channels HART gt 1 2 x gt 1 4 x Temperature AI950 Temperature input 4 x 1 channels resistor gt 1 2 x gt 1 4 x and thermocouple Counter Frequency DP910 Frequency input and counter 2 blocks gt 1 4
28. ed hardware definition files First an empty termination unit S900 has to be configured below the PROFIBUS interface of the Controller The CIPB CI920S has to be configured on position 0 inside the S900 slave Standard PROFIBUS diagnostics can not be processed by AC800M Nevertheless via the status supervision an input value can be detected as valid 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 or not valid in the Controller The alternative way to get diagnostics information is the use of SMART VISION with the S900 DTM Status supervision 3BDD010422R0201 All S900 input values digital and analogue appear with a status information For digital values the status is processed as a further input signal This must be done in the function plan explicitly For analogue input values the status delivered by S900 is combined with the status information produced by AC800M An unvalid input value by S900 leads to an error for the value in the application 47 I O System S900 Communication Interface for PROFIBUS DP CI920 Using CI920 in CB220 p 48 6 Appendix All S900 I O modules and the CI920 can be used either on the termination unit TU921 or in the field device CB220 The scope of this document is the use on the TU921 For use at CB220 the following deviations have to be considered e The special properties of CB220 are described in manual S900 Manual CB220 document numb
29. equirements specified in EMC Directive 89 336 EEC and in Low Voltage Directive 73 23 EEC TRADEMARKS Registrations and trademarks used in this document include Windows Registered trademark of Microsoft Corporation Activex Registered trademark of Microsoft Corporation Industrial IT Trademark of ABB HART HART Foundation 4 3BDD010422R0201 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 TABLE OF CONTENTS TABLE OF CONTENTS aaaea aaaea cul cnic dente hace pnta vade vec annon naga dms Ka Cau Dr ma c kanns 5 1 About this document necesse nnne 7 js 7 Terminology c 8 Related Documentation sisiane idea a iai E entere nnn 8 2 Introduction nente EAE 8 System features esten nnne ettet nnns sitne nens 9 Communication Interface CI920 sse eee 11 Fufictionality ott nai 11 Supported l O Modules sssssessesseseeen ener nnne 12 3 System specifications seen 13 Required system components enn nene 13 Requirements on PLC OCS master systems ssssssssssses 13 System PImils s rd re tates e e taris uim erede ex tee orp 14 Number of PROFIBUS stations ssssssssseeeene 14 Number of I O Modules esses 14 OyCGIe llITig cete ob o teca eU S sc deos 16 4 Communication via PROFIBUS DP V1 esses 18 Slave address node iscritte aec
30. er 3BDD010437 e PROFIBUS addresses can be set from 1 to 99 only The adjustment of the PROFIBUS address is described in CB220 manual e The parameters Power suppy redundancy and fieldbus redundancy must be set of single off These are the default values too If redundancy is parameterized for a CB220 it will report redundancy errors at PROFIBUS diagnosis but nevertheless the station would enter the cyclic data exchange state e The chapter redundancy of this document is not relevant for CB220 e The CB220 offers 4 I O module slots only compared to 16 slots of the TU921 termination unit During configuration in the master s engineering tool either by GSD or DTM Device Type Manager the user has to observe the slot limit e The PROFIBUS diagnosis to cyclic master and DTM s diagnosis view assumes a termination unit with 16 slots If the target configuration contains 4 or less I O modules the remaining slots 5 16 will not report errors at CB220 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP C1920 Printed in Germany Copyright 2002 by ABB All Rights Reserved Registered Trademark of ABB Trademark of ABB http www abb com ABB Automation Products GmbH Borsigstrasse 2 D 63755 Alzenau Phone 49 0 6023 92 0 Fax 49 0 6023 92 3430 3BDD010422R0201 49
31. erman English ABB_04D2 GSG_ ABB 04D2 GSD ABB 04D2 GSG ABB104D2 GSD 1 0 x E 1 1 x E 1 2 x 0 5 1 0 5 1 1 3 x 1 2 0 1 2 0 1 0 3 1 0 3 1 4 x 1 2 0 1 2 0 1 0 3 1 0 3 Mode 1 supports module wise parameterization Mode 2 supports channel wise parameterization Configuration d Definition On PROFIBUS DP the configuration defines the structure of a modular slave and the cyclic data of its I O modules To change the configuration of a PRFOFIBUS slave requires to leave the cyclic data exchange with its master Additional mechanisms like HCIR Hot Configuration In Run can handle a bumpless re configuration S900 supports HCIR together with the ABB controllers AC800M and Symphony Melody Because the required parameters are described in the GSD file of S900 HCIR is possible with every masters which allows the sending of parameter data without interrupting DataExchange state 22 3BDD010422R0201 Variants Behavior 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 Table 4 2 Overview of S900 Communication interfaces Order Type Supported Description No in mode C1920 CIPB 1 2 Communication interface PROFIBUS DP V1 C1920 CIPB C 2 Communication interface PROFIBUS DPV1 with cyclic data C1920 CIPB D 1 Communication interface PROFIBUS DPV1 with hidden diagnostics feature C1920 CIPBCD 1 Communication interface PROFIBUS DPV1 with cyc
32. es They can be configured via the PROFIBUS and their parameters can be defined individually for every 14 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 module or channel The module slots can be assigned as required However the total amount of input data and output data is limited to 244 bytes each Note that the total amount of I O data resulting from additional communication services parameters diagnostics non cyclic services must not exceed 216 bytes for S900 These limitations are specified in the GSD file generic slave data file available for S900 They are monitored by the configuring instance Table 3 1 Data of different I O modules l O modules I O data and status bytes DO910 1 DX910 3 AO910 8 AI910 8 AI950 8 If no cyclic HART secondary variables are to be transmitted no system limitations result from this since the max possible amount of I O data is always less than 216 bytes with 8 bytes per module and a total of 16 modules Thus an I O System S900 station can in any case handle up to 16 I O modules However the total number of transmittable HART variables is limited due to the 216 bytes limit With HART compatible I O modules e g AI930 up to 8 HART variables can be transmitted with the cyclic data for each module HART variables are 32 bit floating point numbers occupying 4 bytes Calculating example Table 3 2 Example of I O
33. everal modules The arrangement of the modules in the station is called the hardware configuration The GSD file describes the individual modules and their characteristics Among these are e Quantity of input data e Quantity of output data e Settable parameters e Diagnostic information Additionally the system limitations are specified e g the max number of modules the max quantity of input and output data etc Module description in the S900 GSD file On PROFIBUS single modules of a modular slave as S900 are identified by the quantity of I O data and its structure Additionally in a GSD file the parameters can differ for modules with the same quantity of I O bytes There are some I O modules with a variable quantity of I O data e g AI930 can deliver up to 8 secondary HART variables For this reason the S900 GSD file can contain more than one variant for an I O module The selectable module is described as order number and variant in brackets For example AI950 TI4 R Compatibility Within the I O System S900 the downward compatibility is ensured A CI920 with newer firmware runs with older I O modules within a project To use the full functionality of the I O System S900 the following GSD file versions should be used 3BDD010422R0201 21 I O System S900 Communication Interface for PROFIBUS DP CI920 Table 4 1 Available GSD files for S900 CI920 GSD Mode2 GSD Mode1 German English G
34. fic modules and channels in 43 I O System S900 Communication Interface for PROFIBUS DP CI920 the data telegram The modules have to be parameterized then to define features like line break monitoring or data formats Refer to the S900 reference manual for details about setting the parameters When the project is released the slave can communicate with the master and can be commissioned The application in the master can access individual I O data Data processing takes place in the master application In the case of AC800F and Control Builder F it is entered in graphical form in the function chart Commissioning with a master system that does not support GSD file import The easiest way to configure and parameterize a S900 is to use the DTM Another convenient way to configure a S900 slave is to import and interpret a modular GSD file device data file In all other cases this document helps you to parameterize a S900 by editing only few bytes of User Parameters This draft document describes parameterization mode 1 In this mode the CI920 has 4 bytes of parameters all I O modules and an empty slot with one byte as parameter It is assumed that the user or reader is familiar with importing and setting up a PROFIBUS DP slave in the used master system or DCS Key features of parameterization mode 1 Generally the settings made for one slot influence all channels of the corresponding module Parameterization is done by selecti
35. gned32 value status LSB Channel status is mapped on LSB Bit 0 of an Unsigned16 or Unsigned32 value no status Channel status is not transferred Rack size 4 8 16 modules Set size of used termination unit Communication interface only communicates with specified number of modules beginning with slot 1 left most 3BDD010422R0201 25 I O System S900 Communication Interface for PROFIBUS DP CI920 Parameter Settings Description Redundancy mode off In case of an error of the active CI920 or its PROFIBUS line the control takes over to the passive CI920 if plugged mode 1 Two communication interfaces for line and redundancy mode 2 Reserved mode 3 Reserved Power supply single No supervision diagnostics of redundant power supplies redundant A power supply failure leads to a diagnostics Cyclic data function 1 Reserved function 2 Reserved function 3 Reserved special Reserved HCIR WCBC base 0 6300ms in Worst Case Bus Cycle Timeout for monitoring the steps of 100ms online re configuration HCIR If the PROFIBUS master supports HCIR these parameters are set automatically HCIR WCBC factor 16 1 The entered time constant WCBC base can be multiplied by 16 HCIR active on off This bit has to be set by the master before the following LeaveMaster telegram starts the HCIR sequence Address Offset value 0 124 Offset of the address of the redu
36. gnostic buffer Bit O to 6 reserved Octet 4 Diag Master Add In this octet the address of the DP master is entered which has parameterized this DP slave If none of the DP masters has parameterized the DP slave the DP slave inserts the address 255 in this octet 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 Octet 5 to 6 unsigned16 Ident Number The manufacturer identifier is given for a DP Device This identifier can be used on one hand for verification purpose and on the other hand for exact identification Status diagnostics The module status is indicated with two bits per slot module Channel errors are ignored Table 4 7 Status diagnostics 7 6 5 0 Octet 1 Header Length 00 00100129 7 0 Octet 2 Header module status 0x82 Octet3 Slot 0x00 7 2 1 0 Octet 4 Reserved identifier 00 no differentiation 01 status active 10 status not active 11 reserved 7 6 5 4 3 2 1 0 Octet5 l O module 3 I O module 2 I O module 1 CIPB status 00 data valid 00 data valid 00 data valid 00 red CIPB ok 01 module error 01 module error 01 module error 01 red CIPB failure 10 wrong module 10 wrong module 10 wrong module 10 reserved 11 missing module 11 missing module 11 missing module 11 red CIPB missing Octet6 l O module 7 I O module 6 I O module 5 1 O module 4 00 data valid 00 data valid 00 data valid
37. ine A logical PROFIBUS structure with a common PROFIBUS address space is usually called a PROFIBUS trunk A trunk or line can consist of one or several segments Segmentation is done due to physical limitations of the PROFIBUS and the number of nodes the baud rate and the cable lengths are taken into consideration Since the S900 Communication Interface has only one PROFIBUS connector for reasons of space cost and energy balance Ex a separate Communication Interface must be used for each line to achieve line redundancy PROFIBUS line redundancy only considers failures of the PROFIBUS line and assumes that both Communication Interfaces are fully operational As the S900 is a PROFIBUS slave both Communication Interfaces are passive PROFIBUS nodes as seen from PROFIBUS they must not be active on the bus on their own initiative Furthermore for the function within the S900 system active and passive Communication Interface are distinguished Active Communication Interface exchange cyclic or non cyclic data with the PROFIBUS master s and control the I O modules on the internal bus CAN bus The redundant Communication Interface which in broad sense could also be called passive Communication Interface communicates with the cyclic master exclusively for diagnostic purposes of the redundant PROFIBUS line For improved scalability and matching to the master system there are two operating modes available at present e Off 0 e Mode 1 As see
38. lic data and hidden diagnostics feature CIPB This variant has to be chosen generally Both parameterization modes and redundancy are supported CIPB C The Communication Interface itself sends cyclic datIa This variant can be selected to enhance the diagnostics of the redundant PROFIBUS line see chapter redundancy further details CIPB D With this variant in parameterization mode 1 single channels can be deactivated to suppress diagnostic messages result from unused channlels CIPB CD Combination from CIBP C and CIPB D available in mode 1 Cold start The S900 interprets the Check Cfg telegram sent by the master as the set configuration If the telegram is free of error it is acknowledged with a 23 I O System S900 Communication Interface for PROFIBUS DP CI920 positive response Otherwise a negative response is returned together with the respective diagnostic message The S900 can start cyclic data exchange even if there is a mismatch between the set and the actual configuration As a result the project planning can be made on the basis of the planned final configuration without requiring that the respective I O modules are actually present S900 will provide the configured default values for the missing modules Re configuration in online mode 24 This term refers to an uninterrupted download of a set configuration HCIR Hot configuration in run mode The HCIR configuration is mandatory for
39. n from the control system these redundancy operating modes work according to the single machine model i e the master the control system only has to consider one slave in the engineering for the user data I O data exchange The decision for a redundancy toggle is made by the slave itself Because of the master slave relationship the slave cannot diagnose the lines 3BDD010422R0201 31 I O System S900 Communication Interface for PROFIBUS DP CI920 32 without the support of the master therefore additional functions are used in the master system depending on the selected operating mode The two lines are physically isolated via a voter RLMO1 For the DP master respectively the DCS the voter is not visible When the master is transmitting both lines are active For receiving the line that receives the first valid character is switched through to the master Thus a master can communicate with the slaves of both lines without a connection between the lines The voter treats both lines identically in all respects so that different slaves S900 systems of a trunk with the lines properly working can be operated on different lines Each CI920 of the I O System S900 is allocated its own station address or none in case of LR NONE The station address of the redundant Communication Interface and the redundancy operating mode is passed to the passive Communication Interface by the active Communication Interface after it has started up
40. n the same bus address to two stations This will cause a crash of cyclic data transfer on both stations Setting the bus address D The setting is made via three coding switches on the termination unit The new address will only be active upon a CI920 restart After changing an address always remove and plug in again the CI920 or switch off the station for a short time 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 Figure 4 1 Termination unit partial view Every decimal place of the address is set individually using the respective coding switch 100 10 1 Figure 4 2 Coding switches 3BDD010422R0201 19 I O System S900 Communication Interface for PROFIBUS DP CI920 Factory setting The factory setting of the S900 address is 0 GSD generic slave data file After physical connection of the stations to the PROFIBUS the entire DP system must be configured in the PROFIBUS master The vendors of industrial PLCs Programmable Logical Controllers or OCS Open Control Systems usable as PROFIBUS masters often provide user friendly PC based configuration tools for this purpose The configuration is based on electronic data sheets the so called GSD device data In the GSD file all slave characteristics relevant for PROFIBUS operation are specified
41. ndant CI920 Address Offset On off Address Offset adjustment enable disable SF1 Reserved SF2 Reserved SF3 Reserved only available relevant for C1920 with own cyclic data CIPB C and CIPB CD Behavior Cold start A parameter telegram sent by the master is submitted to a plausibility check in the S900 The system can only start up properly when the parameter telegram is free of errors If there are any errors in the telegram they are communicated to the operator via the diagnostic function Re parameterization in online mode This term refers to the uninterrupted download of an updated parameter data set into a slave While this procedure is in progress the DataExchange state is never left The I O System S900 permits uninterrupted downloading if the 26 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 master is capable of sending new parameter telegrams In some older master systems however the system needs to be rebooted in this case leading to an interruption of the online download Modern master systems like Symphony CMC60 from ABB provide the required functionality and are therefore perfectly suited for online parameterization Uninterrupted parameter download in accordance with the PROFIBUS specifications requires that the slave is NOT working in DPV1 mode i e there is no non cyclic communication with a Class 1 master All systems acting as a Class 2 master
42. ne applications or engineering tools via a standardized interface FDT Field Device Tool The FDT interface is not especially designed for the PROFIBUS and only supports the services for communication setup MSACO Initiate reading writing and communication interruption MSAC2 Abort Thus the FDT and DTM do not use the full DPV1 functionality 900 additionally provides all diagnostic information via slots and indices in a readable form As a result it is possible to extend the information content of the diagnostics far beyond the standardized scope Among the special features are a time stamp for every event and a ring buffer for historical diagnostic messages Redundancy Q 30 Within one S900 station only bus coupler modules with the same revision level may be used 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 PROFIBUS line redundancy To increase the availability of multi channel remote systems the communication link to these remote systems is implemented as a redundant link For this purpose usually two PROFIBUS cables are laid via different routes to the PROFIBUS nodes This way a redundant bus is established and the two PROFIBUS cables are physically isolated so that the interruption or a short circuit in one of the two cables does not influence the other cable In the following text the individual cables and the connected PROFIBUS nodes are referred to as a PROFIBUS l
43. ng a number for a set of features or parameters How to configure an S900 station in mode 1 44 The configuration defines the layout of the station S900 is a modular slave i e a slave consisting of several modules In some parts of this document the term slot is used as a synonym for module The configuration is very important for both the slave and the master It informs the slave about the arrangement of its I O modules and enables it to perform a diagnostics if there should be a difference between target and real 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP C1920 configuration The master needs the configuration to be able to interpret the I O data of a slave In the first slot the CI920 has to be configured There are two types or variants of a CI920 The difference is the number of I O data for the CI920 itself The first variant delivers or accepts no I O data the second one accepts and delivers two bytes each The meaning of the I O data is not further described here Up to 16 I O modules can be plugged in then Gaps between configured modules has to be filled with Empty Slots How to parameterize a S900 station in mode 1 To drive a PROFIBUS DP slave in the DataExchange state the parameters and the configuration in this order must be sent by a master In the engineering tool of the master the configuration must be defined first The parameter set consists of st
44. nt of 80 bytes were assumed in the following example corresponding to an S900 station with the following configuration 32 digital outputs 48 digital inputs with state 16 analog inputs 8 analog outputs 8 secondary HART variables 3BDD010422R0201 I O System S900 Communication Interface for PROFIBUS DP C1920 T_cyc ms 10000 00 9600 Baud 1000 00 45 45 KBaud 93 75 KBaud 100 00 500 KBaud 1 5 MBaud 10 00 1 00 1 3 5 7 9 1 138 15 17 19 21 23 25 27 29 31 Slaves Figure 3 1 PROFIBUS DP cycle time 3BDD010422R0201 I O System S900 Communication Interface for PROFIBUS DP CI920 4 Communication via PROFIBUS DP V1 Slave address Conventions A Up to 127 stations can be addressed via the PROFIBUS However only 32 stations may be run on each line without using a repeater Since at least one master must exist on the bus the maximum slave address range is 126 Note that diagnostic or configuration devices connected only temporarily to the bus Class_2 masters must be taken into account as well Address 0 must not be used for slaves Address 126 is reserved for commissioning slaves whose address can be configured via the PROFIBUS When using two communication interfaces redundancy the permissible PROFIBUS address range is limited to 1 124 since the redundant CI920 receives a PROFIBUS address made up of the active CI920 address n with n being configurable Do not assig
45. ote I O system for use in hazardous areas It provides bus compatible local inputs and outputs protection IP20 for connection of digital and analog field instruments Due to its degree of explosion protection it can be mounted in both hazardous areas zone 1 and zone 2 and safe areas The system consists of a mounting termination unit accommodating the power supply units the communication interfaces and the I O modules The passive mounting termination unit ensures power distribution and data transfer and also provides the connection platform The power supply units reliably power the entire system One power supply unit is sufficient for normal operation A second redundant power supply unit can be added to improve the system availability The communication interface controls all data traffic between the I O modules and the supervisory open control system OCS or the programmable logical controller PLC The communication interfaces CI920 can also be used in redundancy mode line redundancy and CI920 redundancy foo Figure 2 1 Remote I O with a redundant power supply unit a redundant communication interface and 16 I O modules front view The mounting termination unit is accommodated in a suitable field housing junction box to protect it from environmental exposure Field mounting in hazardous areas requires approved field housings with increased safety I O System S900 Communication Interface for PROFIBUS DP CI920
46. rror has occurred Output signals have no status at all Digital values Digital input data can be transmitted with or without a measuring value status as configured A set status bit identifies the respective channel as invalid In this case the last valid value or the configured default value is transmitted instead A signal status bit and if applicable a measuring value bit is assigned to every channel Analog values Analog values are transmitted as Unsigned16 values in the Motorola format with 15 bit accuracy The measuring value status can be transmitted in bit position 0 or 15 Data are transmitted on channel 1 and higher When a channel is invalid the status bit is set and the last valid value or the configured default value is transmitted instead of the measured value HART variables HART variables are transmitted as FloatingPoint values If the measured value is invalid NAN Not A Number is transmitted as the default value HART variables are transmitted after the data of the analog channels The following order is valid from the lowest channel to the highest from the lowest variable to the highest Non cyclic services DPV1 Functional principle Besides cyclic data exchange the DPV1 extension also permits non cyclic data exchange with a slave Due to this fact the I O System S900 does not need a local service or configuration interface The organization i e the 28 3BDD010422R0201 C1 access C2 access
47. same principle which is described here briefly First the GSD file must be copied to a sub directory under the configuration program or programming tool i e the folder where all GSD files are stored usually GSD Additionally three other files for graphical presentation of the data are delivered with the GSD file In some cases the extension of the database or hardware catalog with the new slaves GSD files needs to be selected explicitly Read GSD The setup of a new system including the master is described in detail in the respective reference manuals and can only be discussed here in brief Usually the drag an drop function is used to add new slaves or modules to a modular slave like S900 First make a logical connection between the slave and the bus Select the slave from the respective menu To facilitate the search operations the slaves are grouped in families S900 belongs to the I O Devices family When the slave is linked to the bus a free bus address is assigned to it Seen from the physical point of view this corresponds to an S900 termination unit without any modules plugged in The empty S900 station is then extended with the CI920 and the individual I O modules The CI920 must be plugged in slot 0 When the module is plugged in the master the data traffic of the individual modules and thus of the entire station is known As a result the master and S900 can assign the input and output data of speci
48. st data telegram to the master will contain valid input data when entering the cyclic data exchange This cannot be ensured for cyclic HART variables 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 Redundancy Mode Off 0 In redundancy operating mode off the redundant CI920 is in passive reserve The redundant passive CI920 does not have a valid station address and thus cannot be accessed via the PROFIBUS This redundancy operating mode does not require any special behavior by the PROFIBUS master system The redundant CI920 becomes active when e the active CI920 is removed or e the PROFIBUS communication of the active CI920 fails longer than 15 s This operating mode features the following restriction e No diagnostics of the redundant PROFIBUS line Redundancy Mode 1 In redundancy operating mode LR MODE a certain behavior of the master is assumed in order to be able to diagnose all failures of the PROFIBUS lines The redundant CI920 becomes active when e the active CI920 is removed or e the PROFIBUS communication of the active CI920 fails This redundancy operating mode features the following characteristics e Monitoring the active PROFIBUS connection in transmit and receive direction e Diagnosing the redundant PROFIBUS connection in transmit and receive direction e No additional engineering requirements e No additional bus load Prerequisites 3BDD010422R0201 The CI920
49. that the inputs are maintained for a short time HCIR compatible OCRs support this function Refer to the PROFIBUS master user manual for details about using the HCIR Reaction in case of erroneous configuration telegrams Modules not involved in the configuration changes continue operation even if the S900 System partly cannot understand the configuration telegram Implausible configuration and parameter telegrams may occur if there is a mismatch between the GDS device data file and the CIPB software version to be used Parameterization D Definition On PROFIBUS DP the parameterization defines the behavior of a configured I O module line monitoring range Changes of parameterization does not affect the structure of I O data so a re compilation of the project is not required any time S900 accepts a parameter telegram without interrupting the cyclic data exchange Modern DCS like ABBs ACS00F are able to send parameter data interrupt free The following parameters have to be set for the communication interface Table 4 3 Communication Interface parameters Parameter Settings Description Parameterization mode 1 Module wise parameterization mode mode 2 Channel wise parameterization Grid frequency 50Hz 60Hz Mains frequency in the direct environment See also description of analog input modules Analog data format status MSB Channel status is mapped on MSB of an Unsigned16 or Unsi
50. to access DPV1 communication and capable of sending a new parameter telegram in online mode permit online parameterization Please refer to the user documentation of the PROFIBUS master for details about how to perform online parameterization Reaction in case of erroneous parameter telegrams To comply with the PROFIBUS specification the DataExchange state must be left when a negative parameter telegram acknowledgement occurs Therefore S900 always acknowledges the telegram with a positive response even if individual module parameters were identified as erroneous The errors are then communicated to the operator by a diagnostic message Modules that receive invalid new parameters retain their previous parameters This ensures continuous operation of all modules that are not directly affected by the error Cyclic data exchange l O data transmission 3BDD010422R0201 Measuring value status A status bit can be assigned to every measuring value identifying it as valid status bit 0 or invalid status bit 1 If a measuring value is invalid the 27 I O System S900 Communication Interface for PROFIBUS DP CI920 configured default value or last valid value is transmitted instead An input value is invalid if the I O module cannot find a plausible measuring value e g in case of a line break or short circuit All channels of a module are identified as invalid if the module is missing or an internal module e
51. uffer This prevents that rapidly incoming and outgoing diagnostic data e g line break signals in case of a loose contact will overload the PROFIBUS with diagnostic telegrams The structure of the diagnostic telegram complies with the PROFIBUS DP standard with extension DPV1 Alarms are not supported Thus vendor specific diagnostic messages are only possible in the channel specific diagnostic part Module errors incl CI920 are transmitted as diagnostic data for channel 0 Table 4 6 Diagnostics overview 0 5 6 14 15 18 19 Header Status Identifier specific Channel specific diagnostics diagnostics diagnostics Octet 1 Station_status_1 The individual bits have the following meaning Bit 7 Diag Master_Lock The DP slave has been parameterized from another master This bit is set by the DP master Class 1 if the address in octet 4 is different from 255 3BDD010422R0201 IO System S900 Communication Interface for PROFIBUS DP CI920 3BDD010422R0201 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 and different from the own address The DP slave sets this bit to zero Diag Prm_Fault This bit is set by the DP slave if the last parameter frame was faulty e g wrong length wrong Ident_Number invalid parameters Diag Invalid_Slave_Response This bit is set by the DP master as soon as receiving a not plausible response from an addressed DP slave The DP slave sets this
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