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Varec 4000 manual

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  • Page 1

    Varec, Inc. 5834 Peachtree Corners East, Norcross (Atlant a), GA 30092 USA Tel: +1 (770) 447 -9202 Fax: +1 ( 770) 662-8939 www.varec.com IOM003GVAE1007 4000 T ank Gauge T r ansmitter Advanced Technology Transmitter for transmission of level and temperature data from the tank side to inventory management systems. Installa tion and Oper a tions Manua[...]

  • Page 2

    [...]

  • Page 3

    i 4000 Copyright All rights rese rved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publicati on may be reproduced, stored in a retrieval sy stem or transmitted in any form or by any means- electronic, mechanical, photocopying, recording or otherw ise- without the prior [...]

  • Page 4

    Tank Gauge Transmitter ii Installation and Operations Manual Disclaimer of W a rranties The contract between the Seller and the Buyer states the entire obligation of the Seller. Th e c on te nt s o f t hi s do cu me nt sh al l n ot be co me p ar t o f o r m od if y a ny pr io r o r ex i sti ng agreement, commitment or relationship be tween the Sell[...]

  • Page 5

    iii 4000 Safety Precaution Definitions Caution! Damage to equipment may result if this precaution is disregarded. Wa rn i n g ! Direct injury to personnel or damage to equipment which can cause inj ury to personnel may result if this precaution is not followed. Safety Precautions READ AND UNDERSTAND THIS INSTRUCTION MANUAL BEFORE INSTALLING, OPERAT[...]

  • Page 6

    Tank Gauge Transmitter iv Installation and Operations Manual[...]

  • Page 7

    v 4000 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.2 Getting Acquainted with the Advanced Technolog y Transmitter (ATT) . . . . .1 1.4 Configuration. . . . . . . . . [...]

  • Page 8

    Tank Gauge Transmitter vi Installation and Operations Manual 5.1.1 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 5.1.2 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.1.3 Input Power . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 9

    vii 4000 9.6.3 Floating Point Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51 9.6.5 Floating Point Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 9.6.6 Floating Point Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 9.7.1 Status Bit [...]

  • Page 10

    Tank Gauge Transmitter viii Installation and Operations Manual[...]

  • Page 11

    1 4000 Introduction 1 Intro duction 1.1 Using T his Manual This manual is designed to assist the user with the in stallation, configuration, op eration, maintenance, and troubleshooting of the Varec Model 4000 Advanced Technology Transmitter (ATT). 1.2 Getting Acquainted with the Advanced T echnology Transmitter (A TT) The Varec Model 4000 Advanced[...]

  • Page 12

    Introduction Tank Gauge Transmitter 2 Installation and Operations Manual 1.3 Ope ration The ATT uses an incremental coun ting technique for determining liquid level. An initial level is identified as part of the calibration procedure. Changes to that level are determined through incremental increases or decreases detected by the ATT. The host compu[...]

  • Page 13

    3 4000 Installation 2 Installation 2.1 Over view This section contains instructions for unpacking, mountin g, grounding, and wiring th e Varec Model 40 00 Advanced Technology Tr ansmitter (ATT) assembly. An i nstallation checklist is also included. Wa rn i n g ! T o avoid electric shoc k and possible injury , do not perform any service procedures o[...]

  • Page 14

    Installation Tank Gauge Transmitter 4 Installation and Operations Manual 2.2 Mounting the Equipment The ATT is bolted to the Model 2500 Automatic Tank Gauge he a d a s i l l u s t r a t e d i n F i g u r e 2 - 2 . I t m a y a l s o b e m o un t e d to Endress+Hause r, Sakura, Tokyo-Ke iso, Shand & Jurs, and Gauging Systems, Inc. float and tape [...]

  • Page 15

    5 4000 Installation 2.3 Grounding the Equipment Wa rn i n g ! The A TT must be grounded before communicatio n and po wer connections are made. An external grounding lug is provided on the ATT. A conne ction from the ground lug to earth ground must be made before any other wiring connections are made. Note! For adequate/proper ope ration of the A TT[...]

  • Page 16

    Installation Tank Gauge Transmitter 6 Installation and Operations Manual Figure 2-3: ATT Field Terminal Block Wiring 2.4.4 Connecting Ho st Communication The procedure used to wire the ATT to the host computer de pends on the type of host in terface option ordered with the ATT. Terminal Block One TB1 Terminal Block Two TB2 1 L+ = ATTI expansion Bus[...]

  • Page 17

    7 4000 Installation 2.4.5 A TT EIA485 Wiring The ATT uses a 2-wire EIA485 hardware interface to communicate with the Modbus maste r. EIA485 is a high speed differential communications network which allows up to 32 devices to op erate on one network. The ATT and Modbus master share a twiste d pair of wires to communica te. Figure 2-4 illustrates the[...]

  • Page 18

    Installation Tank Gauge Transmitter 8 Installation and Operations Manual Figure 2-5: Typical EIA485 System Wiring 110/220 VAC 50/60 Hz. Model 8130 with optional 48 VDC power supply. Field Junction Box Field Junction Box Host Computer Interface MODBUS interface is certified by Honeywell Office Printer RS232 To FuelsManager or other MODBUS master Are[...]

  • Page 19

    9 4000 Installation 2.4.6 A TT Mark/Sp ace Wiring For an ATT using the Mark/Space field communi cations option , the following additional w i ring connections must be made. (Refer to Input Power Wiring in Section 6 to de termine the minimum wire size require d.). See F igure 2-6. • Run two twisted pairs of 18 AWG wire (Mark/Space wires) into the [...]

  • Page 20

    Installation Tank Gauge Transmitter 10 Installation and Operations Manual 2.5 Connecting the RTD The following list shows how the ATT is wired to an RTD de vice. The ATT’s temperature circuit is designed to work with a platinum or coppe r 3-wire RTD. 2.5.1 Connecting the Handheld T erminal Figure 2-3 on page 6 shows how the 1200 Hand Held Termina[...]

  • Page 21

    11 4000 Configuration 3 Configur a tion The Varec Model 4000 Advanced Technolo gy Transmitter (ATT) must be configur ed for the specific tank, attached sensors, and host interface. This section provid es detailed information on ATT configuration. The ATT can be configured with a 1200 Hand Held Terminal or from a host program such as Varec TankView.[...]

  • Page 22

    Configuration Tank Gauge Transmitter 12 Installation and Operations Manual For example, to enter the alpha character "N"; first press the shif t key, then press the number 4. To enter the alpha character "R"; first press the sh ift key, then press the number 1. T er minal Mode Configuration When the Model 1200 is connected to th[...]

  • Page 23

    13 4000 Configuration Figure 3-3: 1200 Hand Held Terminal 3.3 T er minal Mode Oper a tion The 1200 Hand Held Terminal is used to scroll through th e various ATT menus. Basic s croll and selection operations are performed using the four function keys (F1 through F4) immediatel y below the display. Line 1 of the display contains the menu ti tle. Line[...]

  • Page 24

    Configuration Tank Gauge Transmitter 14 Installation and Operations Manual 3.4 Menu Operation For example, whe n the Main Menu is displayed on the top li ne, pressing F1 (Up) will sc roll up through the possible main menu selections while pressing F2 (Down) will sc roll down through the possible main menu selections. Pressing F4 (Enter) will cause [...]

  • Page 25

    15 4000 Configuration 3.4.1 Main Menu Main Menu Description Quick Setup 2 Initia lizes the ATT configuration pa rameters to a variety of preset configurations. Eng Frac 1900, Eng De c 1900, 0-30 m 1900, 0-20m 1900, Eng Fr ac 1800, Eng Dec 1800, 0-30 m 1800, 0-20m 1800, Imperial Modbus, or Metr ic Modbus are valid. Use F1/F2 keys to select . See sec[...]

  • Page 26

    Configuration Tank Gauge Transmitter 16 Installation and Operations Manual 3.4.2 Summary Menu Summary Menu Description Level Current level. Temperature Current temperature RTD Resistance RTD resistance measure d Cfg Error Type Configuration error type detected. Power Log Number of times unit has gone throu gh a power down cycle since it was last co[...]

  • Page 27

    17 4000 Configuration 3.4.3 Configuration Menu Configuration Menu Descr iption Level Units Level units used for disp lay and Modbus data. FT-IN-16TH, M, or FT are valid. Use F1/F 2 to select. Temp Units Temperature units used for disp lay and Modbus data. F, C, or K are valid. Use F1/F2 to select. Level Sensor Direction of gauge. Forward/Reverse Ca[...]

  • Page 28

    Configuration Tank Gauge Transmitter 18 Installation and Operations Manual 3.4.4 Ho st Menu 3.4.5 Notes on Menu Ite ms 1 Only dis played if in Display Mo de 2 Only disp layed if in A lter Mode 3 Only displayed if TRUE Host Menu Description Type Type of host communicat ion interface. Modbus or Mark/Space. Use F1/F2 to select. Mark/Space Adr 4 Addres[...]

  • Page 29

    19 4000 Configuration 4 Only displayed if host interface type is Mark/Space 5 Only displayed if host interface type is Modbus 6 Only displayed if host interface type is Modbus or Mark/Space 7 Only displayed if there is no temperature sensor 3.5 Quick Setup The Quick Setup option is meant to get the ATT co nfigured quickly and with some defaults. It[...]

  • Page 30

    Configuration Tank Gauge Transmitter 20 Installation and Operations Manual 3.5.1 Imperia l Fractional 190 0 Quick Setup Defa ult s General Configuration Level Units FT-IN-16th Temp Units F Level Sensor Forward Damping 0 Temp Sensor Copper RTD Manual Temperature Critical High Level 80-0-0 Advisory High Level 80-0-0 Advisory Low Level 0 Critical Low [...]

  • Page 31

    21 4000 Configuration 3.5.2 Imperial Decimal 1900 Quick Setup De fault s General Configuration Level Units FT-IN-16th Temp Units F Level Sensor Forward Damping 0 Temp Sensor Copper RTD Manual Temperature Critical High Level 80.00 Advisory High Level 80.00 Advisory Low Level 0 Critical Low Level 0 Level Deadband 0.83 Critical High Temp 500 Advisory [...]

  • Page 32

    Configuration Tank Gauge Transmitter 22 Installation and Operations Manual 3.5.3 0-20 Meter 1900 Quick Setup Default s General Configuration Level Un its M eters Temp Units C Level Sensor Forward Damping 0 Temp Sensor Platinum RTD Manual Temperature 0.0 Critical High Level 20.0 Advisory High Level 20.0 Advisory Low Level 0 Critical Low Level 0 Leve[...]

  • Page 33

    23 4000 Configuration 3.5.4 0-30 Meter 1900 Qu ick Setup Default s General Configuration Level Units Meters Temp Units C Level Sensor Forward Damping 0 Temp Sensor Platinum RTD Manual Temperature 0.0 Critical High Level 30.0 Advisory High Level 30.0 Advisory Low Level 0 Critical Low Level 0 Level Deadband 0.03 Critical High Temp 250.0 Advisory High[...]

  • Page 34

    Configuration Tank Gauge Transmitter 24 Installation and Operations Manual 3.5.5 Imperial Fr actional 1800 Series T ransmitter Quick Setup The Imperial f ractional 1800 quick setup selection es tablishe s the same default parameters as the Imperial Fractional 1900 quick setup with the exception that the se nsor to emulate parame ter is the 1800 MWT[...]

  • Page 35

    25 4000 Configuration 3.5.9 Imperial Modbus Quick Set up Default s General Configuration Level Units FT-IN-16th Temp Units F Level Sensor Forward Damping 0 Temp Sensor Copper RTD Manual Temperature Critical High Level 80-0-0 Advisory High Level 80-0-0 Advisory Low Level 0 Critical Low Level 0 Level Deadband 0-1-0 Critical High Temp 500 Advisory Hig[...]

  • Page 36

    Configuration Tank Gauge Transmitter 26 Installation and Operations Manual 3.5.10 Metric Modbus Quick Setup Def ault s General Configuration Level Un its M eters Temp Units C Level Sensor Forward Damping 0 Temp Sensor Platinum RTD Manual Temperature 0.0 Critical High Level 20.0 Advisory High Level 20.0 Advisory Low Level 0 Critical Low Level 0 Leve[...]

  • Page 37

    27 4000 Maintenance and Troubleshooting 4 Maintenance and T r oubleshooting 4.1 Maintenance The Varec Model 4000 Adva nced Technology Transmitter (ATT) is designed a nd manufactured to provide accurate and reliable operation without a requireme nt for regularly scheduled maintenance. Due to the modular construction of the ATT, necessary repairs can[...]

  • Page 38

    Maintenance and Troubleshooting Tank Gauge Transmitter 28 Installation and Operations Manual 4.3 T ro ubleshooting The ATT has provisions for ha rdware alarm inputs, software generated se tpoint alarms, and other alarm conditions. Alarm and error status conditions are available to the Mo del 1200, to the host Computer, and to the optional ATT displ[...]

  • Page 39

    29 4000 Maintenance and Troubleshooting 4.4 A TT Status Conditions The ATT provides the following general status condition. 4.5 A TT Configur ation Er ror Checking The ATT performs ex tensive integrity checking on the config uration data before it uses it for calculations. If a configuration error i s detected, the ATT will generate a CONFIG ERROR [...]

  • Page 40

    Maintenance and Troubleshooting Tank Gauge Transmitter 30 Installation and Operations Manual 4.6 Model 1200 Er r or Messages The following error messages can be encountered while using the Model 1200. 4.7 Host Communication Loopbac k T ests Communications between a host computer an d se veral field devices, such as the ATT, usually occurs on a sing[...]

  • Page 41

    31 4000 Specifications 5 Specifica tions 5.1 Specifications and Physical Characteristics The follow ing specificatio ns apply to the Varec Mod el 4000 Advanced Technology Transmi tter assembly ov er the operating temper ature range. 5.1.1 Environment al 5.1.2 Physical 5.1.3 Input Power Item Specification Temperature -40 o C to +85 o C (oper ating) [...]

  • Page 42

    Specifications Tank Gauge Transmitter 32 Installation and Operations Manual 5.1.4 Level Measurement Item Description Resolution 0.04 in (1 .0 mm) Counter Level Range +/-128 ft (39 M) Count Verification Check Disk Level Data Type Absolute with C alibrated Level Calibration Level Software Configured Units of Measure Software Configured Direction of R[...]

  • Page 43

    33 4000 Specifications 5.2 Safety Agenc y Appr o vals 5.2.1 Explosion Proof The HART Level Encoder i s designed to meet the following safety agency approv al requirements for explosion proof installations: 5.2.2 Intrinsic Safety The ATT is not an intri nsically safe device and must not be ope ned or wired while power is applied. Agency Acronym Agen[...]

  • Page 44

    Specifications Tank Gauge Transmitter 34 Installation and Operations Manual 5.3 Major System Assemblies and Components The major assemblies and comp onents for the Model 4000 are identified in the following table and illustrated in Figure 5-1. Figure 5-1: ATT Major Assemblies Item Assembly/Component Part Number 1 Shaft/Disk Assembly 06-09478 2 Sens[...]

  • Page 45

    35 4000 Order Codes 6 Or der Codes 10 Communication s GE GPE Loop Communication MX Mark S pace Matrix (1600/1700) TI TIWA Y Comm unication WB Whessoe Bus Current Loop (1315) GM GSI T y pe MODB US 20 Approvals CS CSA Cl.I Haz. Loc. (CAN/CSA C22.2,No . 30-M1986) FM FM Cl.I Gr . C,D; Cl.II Gr . E,F ,G Cl.II Haz. Loc. (ETL 557067) AT DEMKO 04 A TEX 032[...]

  • Page 46

    Order Codes Tank Gauge Transmitter 36 Installation and Operations Manual[...]

  • Page 47

    37 4000 Theory of Operation 7 T heor y of Oper a t ion 7.1 Over view The Advanced Technology Tr ansmitter (ATT) r epresents a flexible sy stem for use in liquid le vel measurement a nd/or other measurement applications. The Advanced Te chnology Transmitter (ATT ) collects measurement information from compatible devices and transmits this informatio[...]

  • Page 48

    Theory of Operation Tank Gauge Transmitter 38 Installation and Operations Manual 7.3 Status Inputs and Outputs Status inputs and outputs are accomplished via a separate I/O Module. The ATT will communicate with the Module via the ATTI port. The state of the inputs will be mapped into Modbus registers to al low a ho st computer to read them. Control[...]

  • Page 49

    39 4000 Theory of Operation 7.7 Encoder Batter y Backup The ATT includes battery backup for the encoder. This allows level to be maintained across a power failure. Several consideration are made to protec t the battery from being fully dis charged. 1. The battery must be phys ically enabled by the micr opro cessor. This allows the batte ry to be sh[...]

  • Page 50

    Theory of Operation Tank Gauge Transmitter 40 Installation and Operations Manual Table 7-1: Modbus Functions Table 7-2: Modb us Exception Responses 7.10 Mar k/Space Host Interface The Mark/Space interface provi des compatibility with existi ng Mark/Space data highways. The interface operates in one of two modes. • Transmitter Emulation Mode • V[...]

  • Page 51

    41 4000 Theory of Operation 7.11 Mod bus Suppor t o ver Mar k/Space Host Interface The ATT permits Modbus communications over the Mark/Spa ce data highway. The Modbus re quest message is placed into a Mark/Space message f rame. The ATT processes th e request message and places the Modbus reply in a Mark/ Space reply frame. This option is only avail[...]

  • Page 52

    Theory of Operation Tank Gauge Transmitter 42 Installation and Operations Manual[...]

  • Page 53

    43 4000 ATT Family of Products 8 A TT F amily of Products The ATT product family consists of th e 4000 ATT, the Model 4040 Display Unit, and the Model 4050 Digital Input/ Output Unit. Figure 8-1: ATT Family of Products 8.1 Model 4040 Display Unit The Model 4040 is a four line LCD display unit. It operates connected to and is powered from the ATTI b[...]

  • Page 54

    ATT Family of Products Tank Gauge Transmitter 44 Installation and Operations Manual 8.2 Model 4050 Digital Input/Output Unit The Model 4050 is a digital I/O unit. It includes four digital contact closure outp uts and four digital inputs. It operates connected to and is powered from the ATTI bus. The unit is mounted in a round explosion proof juncti[...]

  • Page 55

    45 4000 Modbus Implementation 9 Modbus Implementation 9.1 Introductio n This protocol guide explains the operation of the Modbus protocol as described in the following Modicon document: PI-MBUS-300 Rev B (1 985) implemented in the V arec Model 4000 Advanced Technology Transmitter (ATT). 9.2 Implementation The implementation of the Modbus protocol f[...]

  • Page 56

    Modbus Implementation Tank Gauge Transmitter 46 Installation and Operations Manual Table 9-1: Modbus Functions Note! Exception: Because the A TT does not di stinguish between inputs and outputs, function codes 01 and 02 as they apply to bits, and function codes 03 and 04 as they apply to nu meric values refer to th e same data registers. For exampl[...]

  • Page 57

    47 4000 Modbus Implementation 9.4 Functions and Data F or mats The Modbus data in the ATT is arranged in integ er registers, floating point registers, and s tatus bits. The assignments for these registers are found at the end of this appendix. Function codes 03, 04, 06, and 16 are used with integer registers. Because of the multiple Modbus hosts av[...]

  • Page 58

    Modbus Implementation Tank Gauge Transmitter 48 Installation and Operations Manual Note! In all of the following communication examples, the erro r ch eck value is dependent upon the mode of transmission. 9.5.1 Integ er Dat a The integer data is a whole number between 0 and the maximum Modbus inte ger (inclusive). The maximum Modbus integer is a us[...]

  • Page 59

    49 4000 Modbus Implementation 9.5.2 Integer Dat a • Hexadeci mal representation • 4124Decimal equivalent: 16,676 The data returned for da ta address 56 is 16,676 (4124 Hex). This value must be scaled using the following formula to give it meaning. If a variable goes out-of-bounds (outside the minimum or maximum scale points), a value equal to t[...]

  • Page 60

    Modbus Implementation Tank Gauge Transmitter 50 Installation and Operations Manual 9.5.4 Coded Da t a Coded data represents a table l ook-up valu e. Data written to these registers must be a valid table entry. Invalid data may cause a Configuration Error to occur. The following ex ample shows coded data at data address 20 (0014 Hex) representing le[...]

  • Page 61

    51 4000 Modbus Implementation 9.6 Floating-P oint Re gisters Although not part of the Modbus protocol specification, fl oating poi nt numbers have been implemented using the IEEE 754 standard. Floating point numbers reduce the complexity required in scaling integer values and provide a means to transmit numbers used by the AT T that ar e not easily[...]

  • Page 62

    Modbus Implementation Tank Gauge Transmitter 52 Installation and Operations Manual 9.6.4 The One 32-bit Reg ister Format Function code 65 (41 Hex) is used to read floating-point registers in this format. An example of a floating-point register read is s hown below with the a temperatur e of 100.0 degrees is being read from register 1 (0001 Hex). 9.[...]

  • Page 63

    53 4000 Modbus Implementation 9.7 Sta tus Bits In the ATT implementation, status bits contain alarms, commands, and status information. The state of a Modbus status bit is defined as either ON (true) or OFF (false). The ON state is represe nted by a "1". The status bits may be read with function code 1 or 2. They may be written one at a t[...]

  • Page 64

    Modbus Implementation Tank Gauge Transmitter 54 Installation and Operations Manual 9.9 Data Out of Range When integer data calculated by the ATT is outside the minimum or maximum scale points or is ot herwise out of range, the value returned is that of the maximum Modbus intege r + 1. For example, if the maximum Modbus integer is 65,534 (as used in[...]

  • Page 65

    55 4000 Modbus Implementation 9.12 Inte ger Register Map Register Number Ty p e Description 0 Scaled Level 1 Scaled Temperature 2 Reserved 3 Reserved 4 Reserved 5 Bit Field AimStat Bit Usage 0 CRIT LO LEVEL 1 ADV LO LEVEL 2 ADV HI LEVEL 3 CRIT HI LEVEL 4 CRIT LO TEMP 5 ADV LO TEMP 6 ADV HI TEMP 7 CRIT HI TEMP 8 HW IN 1 9 HW IN 2 10 ..15 RESERVED 6 [...]

  • Page 66

    Modbus Implementation Tank Gauge Transmitter 56 Installation and Operations Manual 8 9 10 11 12 13 14 15 16 17 18 19 Reserved Code Scaled Scaled Scaled Scaled Scaled Scaled Scaled Scaled Scaled Scaled A/D Noise Reject: Type 0 - 60Hz 1 - 50 Hz Crit Low Level Setpoint Adv Low Level Setpoint Adv High Level Setpoint Crit High Level Setpoint Level Deadb[...]

  • Page 67

    57 4000 Modbus Implementation 29 30 31 32 33 34..99 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144...199 200 202 204 206 208 210 Reserved ASCII ASCII ASCII ASCII Reserved Float Float Float Reserved Float Reserved Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Re[...]

  • Page 68

    Modbus Implementation Tank Gauge Transmitter 58 Installation and Operations Manual 223 224 225 226 Reserved Reserved Code Code Damping Va lue A/D Noise Reject: Type 227 Reserved Reserved 228 229 230 232 234 236 238 240 242 244 246 248 250 252 254 256 258 260 Reserved Reserved Float Float Float Float Float Float Float Float Float Float Float Float F[...]

  • Page 69

    59 4000 Modbus Implementation 9.13 Floating P oint Register Map 9.14 Status Bit Register Ma p Register Number Description 01 23 45 67 89 10 11 12 13 14 15 16 17 18 19 20 21 Level Temp RTD Resist Reserved Reserved Crit Low Level Adv Low Level Adv High Level Crit High Level Level Deadband Crit Low Temp Adv Low Temp Adv High Temp Crit High Level Temp [...]

  • Page 70

    Modbus Implementation Tank Gauge Transmitter 60 Installation and Operations Manual[...]

  • Page 71

    61 4000 Optional Interfaces 10 Optional Interfaces Our intent with these optional interfac es is enabling the ATT to coexist along side older VAREC style and compe titor gauging systems and transmitters. This allows the user upwa rd migration to modern gauging syst ems such as the RS- 485 signal interface utili zing the MODBUS register set prot oco[...]

  • Page 72

    Optional Interfaces Tank Gauge Transmitter 62 Installation and Operations Manual 10.5 4000WBFMO This option can co-exist along side Whessoe Bus™ transmitte rs, the signal format is a current loop style trans mission signal. Transmitter is user selectable between 1 and 127 with basic baud rates stop and parity bits. The protocol is referred to as [...]

  • Page 73

    63 4000 Glossar y Adv Hi Level Advisory High Level alarm set point. When the product leve l exceeds this point an advisory alar m will be generated. Adv Hi Temp Advisory High Temperature alarm set point. When the produc t temperature exceeds this po int an advisory alarm will be generated. Adv Lo Level Advisory Low Level alarm set point. When the p[...]

  • Page 74

    Tank Gauge Transmitter 64 Installation and Operations Manual DBAND Deadband. ft-in-16 Feet-inches-1/16 of an inch. Im perial fractional measurement. oF Fahrenheit. A unit of measure for temperature readings. 0 o C = 32 o F. A temperature of 32 o F is the freezing point of water, 212 o F is the boiling point of water. Host A tank data a cquisition s[...]

  • Page 75

    65 4000 TSU Tank Polling Unit. A Varec interface uni t that allows a host computer to in terface to Vare c Mark/Space, Remote Selector, IFU, and Matrix field interfaces.[...]

  • Page 76

    Tank Gauge Transmitter 66 Installation and Operations Manual[...]

  • Page 77

    67 4000 NOTES[...]

  • Page 78

    Your offical representative Varec, Inc. 5834 Peachtree Corners East, Norcross (Atlant a), GA 30092 USA Tel: +1 (770) 447-9202 Fax: +1 (770) 662-8939 © 2004 Varec, Inc. All Rights Reserved. This document is for in formation purposes on ly. Varec, Inc. ma kes no warranti es, expres s or implied, in this summary. The names of ac tual companie s and p[...]