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IM 01C22T02-01E

A-24

APPENDIX 5. Link Master Functions

APPENDIX 5. LINK MASTER FUNCTIONS

A5.1 Link Active Scheduler

A link active scheduler (LAS) is a deterministic, centralized bus scheduler that can control communications on an H1
fieldbus segment. There is only one LAS on an H1 fieldbus segment.

An EJA supports the following LAS functions.

• PN transmission: Identifies a fieldbus device newly connected to the same fieldbus segment. PN is short for Probe

Node.

• PT transmission: Passes a token governing the right to transmit, to a fieldbus device on the same segment. PT is

short for Pass Token.

• CD transmission: Carry out a scheduled transmission to a fieldbus device on the same segment. CD is short for

Compel Data.

• Time synchronization: Periodically transmits the time data to all fieldbus devices on the segment and returns the

time data in response to a request from a device.

• Live list equalization: Sends the live list data to link masters on the same segment.
• LAS transfer: Transfers the right to be the LAS on the segment to another link master.

A5.2 Link Master

A link master (LM) is any device containing a link active scheduler. There must be at least one LM on a segment.
When the LAS on a segment has failed, another LM on the same segment starts working as the LAS.

LM

Node address:

0x15

SlotTime = 5

LM

Node address:

0x16

SlotTime = 5

Node address: 0x14
SlotTime = 5

Basic device

Node address:

0xF1

Basic device

Node address:

0xF2

Basic device

Node address:

0xF3

Basic device

Node address:

0xF4

LAS

There are 3 LMs on this segment.

LM

FA0501.EPS

Figure 1. Example of Fieldbus configuration-3 LMs on Same Segment

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Содержание vigilantplant EJA Series

Страница 1: ...Y okogawa Electric Corporation User s Manual IM 01C22T02 01E Model EJA Series Fieldbus Communication Type IM 01C22T02 01E 9th Edition...

Страница 2: ...work Management VFD 3 1 3 2 2 Function Block VFD 3 1 3 3 Logical Structure of Each Block 3 1 3 4 Wiring System Configuration 3 1 4 GETTING STARTED 4 1 4 1 Connection of Devices 4 1 4 2 Host Setting 4...

Страница 3: ...A 8 A2 3 Setting the AI1 Function Block A 8 A2 4 Setting the AI2 Function Block A 10 A2 5 Setting the Transducer Block A 10 APPENDIX 3 OPERATION OF EACH PARAMETER IN FAILURE MODE A 12 APPENDIX 4 PID...

Страница 4: ...of LAS A 25 A5 4 LM Functions A 26 A5 5 LM Parameters A 27 A5 5 1 LM Parameter List A 27 A5 5 2 Descriptions for LM Parameters A 29 A5 6 FAQs A 31 APPENDIX 6 SOFTWARE DOWNLOAD A 32 A6 1 Benefits of So...

Страница 5: ...ied warranty of merchantability and fitness for a particular purpose If any question arises or errors are found or if any information is missing from this manual please inform the nearest Yokogawa sal...

Страница 6: ...of an Explosion Protected Instrument of this manual The use of this instrument is restricted to those who have received appropriate training in the device Take care not to create sparks when accessing...

Страница 7: ...rans Neem indien u aanwijzingen op het gebied van explosiebeveiliging nodig hebt in uw eigen taal contact op met de dichtstbijzijnde vestiging van Yokogawa of met een vertegenwoordiger SF Kaikkien ATE...

Страница 8: ...IM 01C22T02 01E 1 4 1 INTRODUCTION LT LV PL EST SLO H BG RO M CZ SK...

Страница 9: ...area 2 1 1 FM approval a FM Explosionproof Type Caution for FM Explosionproof type Note 1 EJA Series differential gauge and absolute pressure transmitters with optional code FF15 are applicable for u...

Страница 10: ...zardous Classified Locations and the National Electrical Code ANSI NFPA 70 Sections 504 and 505 4 The configuration of Associated Apparatus must be Factory Mutual Research Approved under FISCO Concept...

Страница 11: ...except to a leakage current of 50 A for each connected device Supply unit Trapezoidal or rectangular output characteristic only Uo 14 17 5 V I S maximum value Io according to spark test result or othe...

Страница 12: ...with associated nonincendive field wiring apparatus using any of the wiring methods permit ted for unclassified locations 9 Installation requirements Vmax Voc or Vt Imax see note 10 Ca Ci Ccable La L...

Страница 13: ...ON SEAL ALL CONDUITS WITHIN 50 cm OF THE ENCLO SURE UN SCELLEMENT DOIT TRE INSTALL MOINS DE 50 cm DU B TIER When installed in Division 2 SEALS NOT REQUIRED Note 3 Operation Keep strictly the CAUTION o...

Страница 14: ...tance Li of each apparatus other than the terminators connected to the fieldbus line must be equal or less than 5 nF and 10 H respec tively Ci 5nF Li 10 H Supply unit The supply unit must be certified...

Страница 15: ...peration Keep the CAUTION label to the transmitter CAUTION AFTER DE ENERGIZING DELAY 10 MINUTES BEFORE OPENING WHEN THE AMBIENT TEMP 70 C USE HEAT RESISTING CABLES 90 C Take care not to generate mecha...

Страница 16: ...marks are as follows T0201 EPS F0200 EPS Location of the marking 3 Installation WARNING All wiring shall comply with local installation requirements and the local electrical code There is no need for...

Страница 17: ...pe Note 1 Model EJA Series differential gauge and absolute pressure transmitters with optional code SF25 are applicable for use in hazardous locations No IECEx KEM 06 0005 Applicable Standard IEC60079...

Страница 18: ...esource block Manages the status of EJA hardware Automatically informs the host of any detected faults or other problems 2 Transducer block Converts sensor output to pressure signals and transfers to...

Страница 19: ...anual for each host No other details on the host are given in this material Cable Used for connecting devices Refer to Fieldbus Technical Information TI 38K03A01 01E for details of instrumentation cab...

Страница 20: ...ime is in octets 256 s Set maximum specification for all devices For EJA set a value of 4 or greater Slot Time V ST First Unpolled Node Minimum Inter PDU Delay Maximum Reply Delay Unused address range...

Страница 21: ...default value is factory set If two or more EJAs are connected at a time with default value only one EJA will be detected from the host as EJAs have the same initial address Separately connect each EJ...

Страница 22: ...k object 3 index 30002 as 0 299 0 6 0 Refer to section 5 6 1 Link Object for details Since the L0_PRI parameter index 4029 of the AI1 block is set to 0 try setting this value to 3 Select the Write fun...

Страница 23: ...t the field devices necessary for instrumenta tion EJA has passed the interoperability test conducted by The Fieldbus Foundation In order to properly start Fieldbus it is recommended that the devices...

Страница 24: ...value of 4 or greater T0502 EPS Symbol Parameters Description and Settings V ST Slot Time V MID Minimum Inter PDU Delay Minimum value of communication data intervals Unit of time is in octets 256 s S...

Страница 25: ...Tags and Addresses This section describes the steps in the procedure to set PD Tags and node addresses in the EJA There are three states of Fieldbus devices as shown in Figure 5 4 and if the state is...

Страница 26: ...r each parameter may cause inconsistent operation Table 5 4 VCR Static Entry T0504 1 EPS Sub index Parameter Description 1 FasArTypeAndRole Indicates the type and role of communication VCR The followi...

Страница 27: ...on blocks and schedule of execution 5 6 Block Setting Set the parameter for function block VFD 5 6 1 Link Object A link object combines the data voluntarily sent by the function block with the VCR The...

Страница 28: ...er Five trend objects are factory set as shown Table 5 9 Table 5 9 Trend Object are Factory Set T0509 EPS Index Parameters Factory Settings 32000 Not used TREND_FLT 1 32001 Not used TREND_FLT 2 32002...

Страница 29: ...TATUS_8 VIEW 1 VIEW 2 VIEW 3 VIEW 4 Relative Index Parameter Mnemonic Totals bytes Table 5 12 View Object for Transducer Block T0512 EPS VIEW 1 VIEW 2 VIEW 3 VIEW 4 1 ST_REV 2 2 TAG_DESC 3 STRATEGY 4...

Страница 30: ...to how to set them MODE_BLK Indicates the three types of function block modes Out_Of_Service Manual and Auto In Out_Of_Service mode the AI block does not operate The Manual mode does not allow values...

Страница 31: ...ific to the measurement of the differential and normal pressure of the EJA For a list of the parameters of each block of the EJA refer to List of parameters for each block of the EJA in Appendix 1 The...

Страница 32: ...le failure 2 AL 21 The resource block is in O S mode AL 22 The transducer block is in O S mode AL 23 AI1 function block is in O S mode AL 41 AL 42 AL 43 AL 61 Out of the range of the built in indicato...

Страница 33: ...s switched on simulation is enabled See Figure 6 2 To initiate the same action from a remote terminal if REMOTE LOOP TEST SWITCH is written to the SIM_ENABLE_MSG parameter index 1044 of the resource b...

Страница 34: ...0002000 0x00001000 0x00000800 0x00000400 0x00000200 0x00000100 0x00000080 0x00000040 0x00000020 0x00000010 0x00000008 0x00000004 0x00000002 0x00000001 T0701 EPS Table 7 2 Contents of DEVICE_STATUS_2 i...

Страница 35: ...n O S mode Transducer Block is in O S mode AI2 Function Block is in Simulation mode AI2 Function Block is in Manual mode AI2 Function Block is in O S mode AI1 Function Block is not scheduled AI1 Funct...

Страница 36: ...tion option 1 Contact Yokogawa sales representative for the use of function block for static pressure Safety Barrier for CENELEC ATEX KEMA Intrinsically Safe Type T0802 EPS Supplier P F Type Isolator...

Страница 37: ...mp 40 to 60 C 40 to 140 F FM Intrinsically Safe Approval 1 Entity Model Cl I II III Division 1 Groups A B C D E F G Temp Cl T4 and Cl I Zone 0 AEx ia IIC Temp Cl T4 Groups A B C D E F G and Group IIC...

Страница 38: ...download function 7 Based on FOUNDATION Fieldbus Specification FF 883 Download class Class1 EE 1 Applicable for Electrical connection code 2 and 7 2 If cable wiring is to be used add the YOKOGAWA assu...

Страница 39: ...shown 7 1007 RS_STATE State of the resource block state machine 8 1008 Null TEST_RW Read write test parameter used only for conformance testing and simulation AUTO 9 1009 Null DD_RESOURCE String iden...

Страница 40: ...number of unconfirmed alert notify messages allowed AUTO 33 1033 640000 20s CONFIRM_TIM The minimum time between retries of alert reports AUTO 34 1034 Not locked WRITE_LOCK If set no writes from anyw...

Страница 41: ...target permitted and normal modes of the block AUTO 6 4006 4106 BLOCK_ERR This parameter reflects the error status associated with the hardware or software components associated with a block It is a b...

Страница 42: ...alarm AUTO 30 4030 4130 INF LO_LIM The setting for the low alarm in engineering units AUTO 31 4031 4131 0 LO_LO_PRI Priority of the low low alarm AUTO 32 4032 4132 INF LO_LO_LIM The setting of the lo...

Страница 43: ...ill set the Active status in the Status attribute 9 2009 TRANSDUCER_ DIRECTORY A directory that specifies the number and starting indices of the transducers 10 2010 100 Standard Pre ssure with Calibra...

Страница 44: ...The current alert status unacknowledged status unreported status and disabled status of the alarms associated with the function block 38 2038 TEST_1 Not used for EJA 39 2039 TEST_2 Not used for EJA 4...

Страница 45: ...UT_SCALE The range determined with the output scale becomes the scale and unit of the built in indicator Note If a built in indicator is available the lower bound and the upper bound of the range nume...

Страница 46: ...ing are the operating conditions which the individual blocks will take AI Function Block Automatic Auto Yes Yes Yes Yes Yes Yes Yes TA0202 EPS Manual Man Out of Service O S Transducer Block Resource B...

Страница 47: ...abs 1576 gauge inHg 1155 1577 abs 1578 gauge 1156 0 C 1579 abs 1580 gauge mmHg 1157 1581 abs 1582 gauge 1158 0 C 1583 abs 1584 gauge 1342 3 Setting the output mode FA0204 EPS Access the L_TYPE paramet...

Страница 48: ...A0209 EPS Access the TERTIARY_VALUE parameter Set the temperature in the following units 1001 C 1002 F 3 Range change while applying actual inputs It is possible to calibrate the sensor by applying th...

Страница 49: ...it is necessary to shift current output so as to indicate the actual correct level with the XD_SCALE parameter For details of how to set the XD_SCALE parameter refer to Setting the output scale in Sec...

Страница 50: ...Device Failure PV STATUS BAD Device Failure PV STATUS BAD Non Specific SV STATUS BAD Device Failure BLOCK_ERR Device Needs Maintenance Now XD_ERROR I O Failure or Electronics Failure SV STATUS BAD Non...

Страница 51: ...V STATUS UNCERTAIN Non Specific OUT STATUS UNCERTAIN Non Specific PV STATUS BAD Non Specific for AI1 OUT STATUS BAD Non Specific for AI1 OUT STATUS HOLD When if Man Mode is not set or Uncertain Substi...

Страница 52: ...hat is to be actually output Switches over the direction of control action between direct and reverse i e the direction of changes in the control output depending on the changes in the deviation When...

Страница 53: ...e as that for an AI block Measured value the non dimensional value that is converted from the input IN value based on the PV_SCALE values and filtered Setpoint Output Upper and lower scale limit value...

Страница 54: ...ded to the output of the PID computation Scale limits used for converting the FF_VAL value to a non dimensional value Gain for FF_VAL Same as that for an AI block Same as that for an AI block Same as...

Страница 55: ...PV value sampled most recently and the PV value sampled at the preceding control period respectively A4 4 2 PID Control Parameters The table below shows the PID control parameters Parameter Descriptio...

Страница 56: ...trol action is suspended The PID block enters this mode when the specified condition is met see Section A4 14 Out of service mode in which neither the control computation nor action is carried out and...

Страница 57: ...RCas Mode By selecting Obey SP Limits if Cas or RCas in CONTROL_OPTS see Section A4 13 the setpoint high low limits can be put into force also when the value of MODE_BLK is Cas or RCas A4 12 External...

Страница 58: ...LO NI or IR The user cannot manually change the mode to IMan A mode transition to IMan occurs only when the condition above is met A4 15 Manual Fallback Manual fallback denotes an action in which a PI...

Страница 59: ...modes are as shown below In fact if Normal shed normal return is set for SHED_OPT detection of a computer failure causes MODE_BLK actual to change to Cas Auto or MAN whichever is set in MODE_BLK permi...

Страница 60: ...value of IN status of the PID block is not Bad 7 Check that Auto is set in MODE_BLK permitted of the PID block 8 Set MODE_BLK target of the PID block to Auto When finishing all steps in order the PID...

Страница 61: ...N ALARM_HYS HI_HI_PRI HI_HI_LIM HI_PRI HI_LIM LO_PRI LO_LIM LO_LO_PRI LO_LO_LIM DV_HI_PRI DV_HI_LIM DV_LO_PRI DV_LO_LIM HI_HI_ALM HI_ALM LO_ALM LO_LO_ALM DV_HI_ALM DV_LO_ALM Subtotals Totals 1 11 11 4...

Страница 62: ...ompel Data Time synchronization Periodically transmits the time data to all fieldbus devices on the segment and returns the time data in response to a request from a device Live list equalization Send...

Страница 63: ...ich an LAS is running After making changes to the settings do not turn off the power to the EJA for at least 30 seconds 1 Set the node address of the EJA In general use an address from 0x14 to V FUN 1...

Страница 64: ...ssage and Node Activation SPDU message to devices which return a new PR Probe Response message Passes a PT Pass Token message to devices included in the live list sequentially and monitors the RT Retu...

Страница 65: ...lpduPhlOverhead 3 MaxResponseDelay 4 FirstUnpolledNodeId 5 ThisLink 6 MinInterPduDelay 7 NumConseeUnpolledNodeId 8 PreambleExtension 9 PostTransGapExtension 10 MaxInterChanSignalSkew 11 TimeSyncClass...

Страница 66: ...ActiveScheduleStartingTime 0 1 Version 2 MacrocycleDuration 3 TimeResolution 0 1 Version 2 MacrocycleDuration 3 TimeResolution 0x00 0x4900000000000000 1 0x1 1 0x1 0 0x0 0 0x0 128 0x80 128 0x80 128 0x8...

Страница 67: ...evice address 0x00 and final bit to 0xFF The value of LiveListStatusArrayVariable in the case where devices having the addresses 0x10 and 0x15 in the fieldbus segment is shown below 0x00 00 84 00 00 0...

Страница 68: ...1 1 1 1 1 1 1 0 Half duplex 1 Full duplex 0 Disabled 1 MAU 2 MDS Channel 1 is enabled Channel 1 is enabled Channel 1 is used for reception Wire medium voltage mode and 31 25 kbps are selected Channel...

Страница 69: ...writing 0x00 false to PrimaryLinkMasterFlagVariable in the current LAS and 0xFF true to PrimaryLinkMasterFlagVariable index 364 in the EJA Q3 On a segment where an EJA works as the LAS another device...

Страница 70: ...cified measurement and or control actions even while software is being downloaded to them Upon completion of a download however the devices will be reset internally to make the new down loaded softwar...

Страница 71: ...an engineering tool parameter setting utility or the like before carrying out a software download and then reconfigure the field device s after the down load For details see Section A6 6 CAUTION The c...

Страница 72: ...ansducer block calibration parameters that are retained in the nonvola tile memory inside the target device will remain unchanged after a software download However after a software update which causes...

Страница 73: ...egment is noisy An error occurs after activation Check the noise on the fieldbus segment Transient error caused by the internal resetting of the field device Check whether communication with the field...

Страница 74: ...or in module 1 Checksum error in file Unused Write prohibited area in FlashROM Verification error during FlashROM writing Polling error during FlashROM erasing Polling time out during FlashROM erasing...

Страница 75: ...TDWN_ERROR SOFTDWN_COUNT SOFTDWN_ACT_AREA SOFTDWN_FORMAT 1 16 SOFTDWN_MOD_REV SOFTDWN_PROTECT 2 35 73 22 30 1 Total bytes VIEW 4 1 2 57 53 Relative Index VIEW 1 Parameter Name VIEW 3 VIEW 2 58 56 54 5...

Страница 76: ...Index Download Domain Header Index Header Size Header Version Number State Reserved ReadyForDwnld Delay Secs Write Rsp Returned For PREPARE Activation Delay Secs Command Manufacturer ID Device Type W...

Страница 77: ...ytes Description Download Class Indicates the download class 1 Class 1 1 1 Write Rsp Returned For ACTIVATE Indicates whether a write response is returned to the ACTIVATE command 1 Write Response Retur...

Страница 78: ...the domain header to which the download is performing Activated Domain Header Index Indicates the index numbers of the domain header currently running Indicates the domain name With this product Doma...

Страница 79: ...ELEC ATEX KEMA Explosionproof Add KS25 to the Optional Specifications table 7th Jan 2005 1 3 2 3 4 2 5 2 5 8 5 9 6 1 8 1 8 2 A 4 A 6 A 8 A 24 1 3 2 1 1 4 2 5 2 5 3 5 6 4 5 6 5 6 2 2 8 1 8 2 A1 2 A1 3...

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