Siwarex CS外部接口命令指南

SIWAREX®CSDescription of PeripheralInterface Edition 02.2006Warning and Safety TermsThis manual contains notices that are for your personal safety and to prevent damage to devices or surroundings. These notices are indicated by a warning triangle and are presented as follows depending on the degree of danger:Dangermeans, that death, severe injury or considerable material damagemay result, if the respective safety measures are not taken.WarningMeans that death, severe injury or serious material damage can result if the corresponding safetyprecautions are not followed carefully.CautionMeans that material damage or minor injuries can result if the corresponding safety precautions arenot followed carefully.CautionMeans that material damage can result if the corresponding safetyprecautions are not followed carefully.AttentionRefers to important information on the product, handling of a product or acorresponding segment of the documentation to which special attentionshould be given.Qualified PersonnelCommissioning and operation of a device may only be performed by qualified personnel. Qualified personnel as indicated in the safety information in this manual are people that have the authorization to install, ground and label devices, systems and power circuits.Intended UtilizationWarningThe device may only be utilized for the applications described in the catalog and the technicaldescription and only in conjunction with external devices and components that are approved orrecommended by Siemens.Fault-free and safe operation of the product depend on proper transport, proper storage, assembly,installation, operation and maintenance.Brand names / TrademarksSIWAREX®, SIMATIC®, SIMATIC HMI® and SIMATIC NET® are trademarks of the Siemens AG. The other designations in this info may be trade marks the use of which by third persons for their own purposes might infringe proprietor rights.Copyright ©Siemens AG 2006 All rights reserved Circulation or duplication of this document, utilization and disclosure of its contents are not permitted unless explicitly approved. Offenders will be liable for damages. All rights reserved, including rights created by granting of patents or registration of a utility model or design.Siemens AGAutomation & Drives Dept.SIWAREX Weighing SystemsA&D PI 14Östliche Rheinbrückenstr. 50D-76187 Karlsruhe DisclaimerWe have tested the contents of this document for compatibility with the hardware and software described. This does not exclude the possibility of discrepancies, in which case we do not guarantee the complete compatibility of this document. The information in this document is assessed regularly and any necessary corrections are included in the next revision.We are grateful for any suggestions for improvement.© Siemens AG 2006Subject to change without notice.Purpose of the DescriptionThis description provides you with the information necessary for setting upcommunication between SIWAREX CS and a PLC via the peripheral interface. Basic Knowledge RequiredGood knowledge in the field of SIMATIC automation technology is necessary inorder to understand the manual. Weighing technology is also beneficial.Area of Validity of the DescriptionThis manual applies to the SIWAREX CS module:Type Name Order number From productrevision (Version)SIWAREX CS SIWAREXCompact Scale 7MH4910-0AA01 HWV2FWV1.3Table 1 Scope of ManualNoteThis manual contains the description of all modules that are valid at the time of publication.We reserve the right to supply new modules or newer versions of modules with product information containing current information about the module.•SIWAREX CS - Peripheral InterfaceSmaller, permanently defined data such as commands, various process data and error information are transferred quickly via the peripheral interface.The peripheral interface is divided into two transmission direction-related data sections of 8 bytes each:• Control section (8 bytes PA: PLC → SIWAREX CS)• Feedback section (8 bytes PE: SIWAREX CS → PLC)The control section can only be written by the PLC and the feedback section only read.The data consistency in the peripheral section of the ET200S is guaranteed double word-wise as in S7-300. Data which are to be entered consistently must be addressed accordingly.A consistency of the data in the feedback section is only guaranteed in SIWAREX CS within the first (coordination byte and error) or the second 4-byte block (status and process value).1. Control SectionByte Type Control Section0 BYTE Coordination byte PBUS communication (Table 3)1 BYTE Command code2INT Ext. tare specification34 BYTE ---5 BYTE ---6 BYTE ---7 BYTE ---Table 2 Assignment of the peripheral interface to the ET200SCoordination with PLCBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0BIQ------ NEUSTQWKNGLBTable 3 Coordination bits in byte 0 of the PLC control sectionWKNG identification for selection of the current process value to be displayed in the value field(table 6)NEUSTQ start-up acknowledgement bit of the PLCLBQ acknowledge life bitBIQ command interpretation with acknowledgement requestedCommandsThe commands serve to control the technology by the user program. The command codes are described in Table 7.External Tare Specification of PLCIn byte 2 and 3 of the control section of the peripheral interface, an external tare specification canbe entered by the ET200S. The value is accepted with the command 26.2. Feedback SectionByte Type Feedback Section0 BYTE Coordination byte PBUS communication (Table 5)1 BYTE Refresh counter (0...127)2 BYTE Synchronous error info (SF)3 BYTE Asynchronous error info (bit-wise)4INT Process value (depending on the selection in WKNG in the coordination byte) 56WORD Status7Table 4 Assignment on the peripheral interface to the ET200SCoordination with PLCBit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0NEUSTLBQ BI ---SFWKNGTable 5 Coordination bits in byte 0 of the PLC feedback sectionWKNG identification for the process value displayed in the value field (table 6)SF synchronous error (data/operating error)NEUST start-up bit of the SIWAREX CSLB life bit of the SIWAREX CSBI command interpretation completedRefresh CounterIncremented for every transformation cycle regardless of a change in byte 0 and byte 2...7. If an ADU error leads to stopping of the transformation cycles, the counter comes to a standstill. Synchronous ErrorsData and commands transferred from the head module to the SIWAREX CS module are tested. Synchronous errors which occur are reported as an error code via the peripheral interface byte 2 and thus signaled to the user for a possible programmed reaction in the user program (Table 10). Asynchronous ErrorsAsynchronous errors which occur are reported via the peripheral interface byte 3 and thus signaled to the user for a possible programmed reaction in the user program. The asynchronous errors are saved in byte 3 bitwise (simultaneously settable) and not as a code.Process DataThe process values and the status are updated every 20ms after the weight calculation in the data record DS30. The process value, status and asynchronous error data are taken from this for transfer to the feedback section.With the identification WKNG in the control section, the user can select dynamically which process value is to be entered from Table 6 by SIWAREX CS in the process value field in the feedback section. The WKNG is mirrored in the coordination byte of the feedback section when the requested value is ready.SourceWKNG Content of the Value Field(SHORT)0 B / N weight (default)Weight (depending on status bit SF_NET)1 Tare weight Tare value2 Gross process value Gross3 Net process value Net4 Tare process value Tare5 Filtered raw value Filtered raw value6 Unfiltered raw value Unfiltered raw value7 --- free (no error -> 0 is supplied as a value)Table 6 Selection of the process value for the display in byte 4/5 of the control section3. Life Bit Monitoring (LB / LBQ)A life bit monitoring is carried out between the PLC and the SIWAREX CS module in the PLC-RUN state by the coordination flags LB and LBQ. For this, the SIWAREX CS reads the delivered bit LB in the control section and reflects it in LBQ in the feedback section. On the PLC side a time for monitoring the SIWAREX CS module can therefore be managed.This is an additional software monitoring at application level. The processor is already hardware monitored by the module itself.4. Start-up Coordination (NEUST / NEUSTQ)A start-up coordination is carried out between the PLC and the SIWAREX CS module by the flags NEUST and NEUSTQ.The start-up coordination is started when PLC restart is recognized (OD signal active) or the SIWAREX CS itself restarts. At the beginning of the start-up coordination, the module sets itself in the basic state in relation to the peripheral interface and may break off an existing communication job. The module then sets the flag NEUST and deletes all the other flags in the coordination byte of the feedback signals.Then the PLC can perform the necessary initializations and then sets the restart acknowledgement bit NEUSTQ. As soon as the SIWAREX CS recognizes the set flag NEUSTQ, it resets the flag NEUST. The PLC then ends the start-up synchronization by also resetting the NEUSTQ flag. There is no other reaction to SIWAREX CS side.Figure 1 Start-up coordination1: If the SIWAREX module restarts or has detected a PLC restart, the NEUST bit is set in the feedback section.2: Then the user sets the NEUSTQ bit.3: The SIWAREX C detects the request NEUSTQ = 1 and sets NEUST=0. Data can then be transferred from this time on.4: The user deletes the NEUSTQ.Until time 4 the data exchange via the peripheral section (life bit, commands) is not operated.5. Commands from the SIMATIC (BI / BIQ)The commands are transferred via byte 1 of the control section of the peripheral interface. The BI/BIQ mechanism is used for transferring a command:Figure 2 Diagram of command transfer1: If a command is to be written, the user enters the command code in the control signals.The BI bit must be at zero.2: Then the user sets the BIQ bit.3: The SIWAREX CS recognizes the request BIQ = 1 and reads in the command. It then deletes the synchronous error and sets the BI bit.4: The user deletes the BIQ bit.5: The SIWAREX CS has received the command and interprets it. If it detects an error, it enters the appropriate error code in the error byte SF.6: As soon as the SIWAREX CS has completed the interpretation and the BIQ bit = 0, it deletes the BI bit.7: The user detects BI = 0 a then checks the error byte SF from the feedback signals. The user may only transfer a new command after BI=0.BIQ is only accepted if:BI =0NEUST = 0NEUSTQ = 06. CommandsIf the module is in the “Fault” operating state, only command 8 “Load factory setting” is accepted, all other commands are rejected with data/operating error 21 F_BG_FAULTY.Code Name Meaning Operating StatusService mode /Adjustment1 DS4 back up in Flash Back up limit value parameters in Flash (DS4) n2 Back up DS26 in Flash Back up tare and zero setting value in Flash (DS26) n3 Zero point valid Command zero point valid n, y *)4 Adjustment weight 1 valid JG1 command valid n, y *)5 Adjustment weight 2 valid JG2 command valid n, y *) 8 Load factory defaults All data records are loaded with default values all *)Weighing21 Zero Setting Gross weight zero setting n22 Tare Net weight zero setting (set tare memory) n23 Delete tare Delete tare memory n24 Tare input value from DS15 valid ext. tare input value from DS15 transferred to thetare memory n25 Show weight in enh. resolution Output/display of calibrated weight value withenhanced resolution for 5 s (B/N weight from DS30) n26Tare input value from control sectionvalidext. tare input value from the control sectiontransferred to the tare memory n Table 7 Commands*) These commands are not accepted when write protection = ON because they change the DS37. Status FlagsBit_No Name Range of Values / Meaning0 Limit 1ST_GW11 = Limit value 1 has responded1 Limit 2ST_GW21 = Limit value2 has responded2 Scale taredST_NET1 = tare memory occupied (≠ 0)3 Preset tareST_PT1 = tare memory contains ext. default value4 Max+9eST_MAX_9E1 = Gross weighing range exceeded or undershot by more than 9 display steps5 ¼d zeroST_ZERO1 = gross less than ± 0.25e6 StandstillST_STILL1 = Standstill exists7 Module adjustedST_JUST1 = module adjusted8 Calibration parameter entryblockedST_WRP_ON1 = Write protect switch active;(No calibration parameters or adjustment commands can be sent)9 Min. weighing rangeundershotST_WR_MIN1 = Min. weighing range undershot10 ----11 ----12 ----13 ----14 ----15 Module faultST_FAULT1 = global module fault (SF)Table 8 Status flagsThe status word is also entered in the status word (byte 4+5) of the PLC feedback section.8. Error MessagesOperating Error BitsBit No. Name Range of Values / Meaning0 B_AF_RAM 1= Reboot due to RAM error1 B_AF_WATCHDOG 1= Reboot due to watchdog error2 B_AF_PROGRAMM 1= Reboot due to program error3 B_AF_ZAHL_GEWICHT 1= Number overflow in weight calculation4 B_AF_PARAM_ALLGEMEIN 1= Parameter error5 B_AF_MESSWERT 1= AD converter at limit of measuring range6 B_AF_DRAHTBRUCH 1= Minimum voltage undershot on sensor line7 B_AF_AD_WANDLER 1= AD converter faultTable 9 Asynchronous error info (operational erro r)This operational error byte is also entered in byte 3 of the PLC feedback section.•Data/Operating Error (Synchronous)Code Name Meaning1 SF_COMMAND_UNKNOWN Command unknown2 SF_DS_UNKNOWN Unknown data record4 SF_NOT_TEST_MODE Command or data transfer only permissible in test bench mode5 SF_WRITE_PROTECTION_CALIBRATION_DATACalibration parameters /adjustment command transfer not permitted with writeprotection.7 SF_NOT_STILL Command not permissible because not status ST_STILL8 SF_COMMAND_DELTA_TIME Minimum time span between two commands not observed20 SF_NOT_ADJUSTED Command not allowed because the scale is not set21 SF_BG_FAULTY Command not permissible because module is faulty (SF)85 SF_ADJ_POINT_UNDEF DS3: Command not permissible because adjustment point is undefined (adjustment weight just_gewx is 0 (not parameterized)94 SF_ADJ_WT_DELTA DS3: Adjustment weight distance between 2 adjustment points less than 5% FullScale or adjustment digit spacing less than 3000 digits)96 SF_TARE_OUTSIDE_RANGE Taring not performed because tare outside tare value range, i.e. between tare minimum value (0.5*digit step) and tare maximum value (x% of WBmax), both at ext tare specification and tare command100 SF_ZERO_SETTING_RANGE_WB Gross weight outside zero setting range (output when the zero setting limits parameterized in DS3 are exceeded)171 SF_CHECKSUM Checksum error in loaded DS26 (rewritable process values) 172 SF_FLASH Error in data record flash220 SF_ADU_CAL Error occurred in calibration function Table 10 Synchronous data/operating errorAbbreviationsADC Analog-Digital ConverterASCII American Standard Code for Information InterchangeweightB GrossBG ModuleO&O Operating and ObservingCPU Central processing unitoutputDO DigitalblockDB DatainputDI DigitalFC STEP7 function callFB Function block (S7)FM Function module (for S7-300)HMI Human machine interface (SIMATIC Operator Panel)HW HardwareMPI Multi-Point-InterfaceNAWI Non-automatic weighing instrumentNSW Non-automatic weighing instrumentOP Operator Panel (SIMATIC)P-BUS Peripheral bus (S7)ComputerPC PersonalpT Preset tare (predefined tare weight with manual taring)RAM Random Access MemoryS7-300 Siemens Automation System for the mid-performance-rangeS7-400 Siemens Automation System for the high-level performance range SFC System Function Call (S7)STEP 7 Programming device software for SIMATIC S7weightT TareTIA Totally Integrated AutomationTP Touch Panel (SIMATIC)WRP Write Protectioncell(s)LC Load。