IOM003GVAE1007 4000 Tank Gauge Transmitter Advanced Technology Transmitter for transmission of level and temperature data from the tankside to inventory management systems. Installation and Operations Manual www.varec.com Varec, Inc.
4000 Copyright All rights reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means- electronic, mechanical, photocopying, recording or otherwise- without the prior written permission of the Publisher: Varec, Inc. 5834 Peachtree Corners East Norcross (Atlanta) GA 30096 USA Trademarks acknowledged Varec, Inc.
Tank Gauge Transmitter Disclaimer of Warranties The contract between the Seller and the Buyer states the entire obligation of the Seller. The contents of this document shall not become part of or modify any prior or existing agreement, commitment or relationship between the Seller and Buyer. There are no express or implied warranties set out in this document. The only warranties that apply are those in the existing contract between the Seller and Buyer. Varec, Inc.
4000 Safety Precaution Definitions Caution! Damage to equipment may result if this precaution is disregarded. Warning! Direct injury to personnel or damage to equipment which can cause injury to personnel may result if this precaution is not followed. Safety Precautions READ AND UNDERSTAND THIS INSTRUCTION MANUAL BEFORE INSTALLING, OPERATING OR PERFORMING MAINTENANCE ON VAREC 4000 SERIES TANK GAUGE TRANSMITTER.
Tank Gauge Transmitter iv Installation and Operations Manual
4000 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1 Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.2 Getting Acquainted with the Advanced Technology Transmitter (ATT) . . . . .1 1.4 Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 1.5 Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tank Gauge Transmitter 5.1.1 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.1.2 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.1.3 Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.1.4 Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 5.2.1 Explosion Proof . . . . . . . . . . . . . .
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 Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53 9.8 Exception Responses . . . . . . . . . . . . . . . . . . . . . . .
Tank Gauge Transmitter viii Installation and Operations Manual
4000 1 Introduction Introduction 1.1 Using This Manual This manual is designed to assist the user with the installation, configuration, operation, maintenance, and troubleshooting of the Varec Model 4000 Advanced Technology Transmitter (ATT). 1.
Introduction 1.3 Tank Gauge Transmitter Operation The ATT uses an incremental counting 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 computer collects measurement information by polling the Advanced Technology Transmitter over a variety of communication interfaces such as EIA485 and Mark/Space.
4000 2 Installation Installation 2.1 Overview This section contains instructions for unpacking, mounting, grounding, and wiring the Varec Model 4000 Advanced Technology Transmitter (ATT) assembly. An installation checklist is also included. Warning! To avoid electric shock and possible injury, do not perform any service procedures other than those specified in this manual. These installation instructions are for use by qualified service technicians.
Installation 2.2 Tank Gauge Transmitter Mounting the Equipment The ATT is bolted to the Model 2500 Automatic Tank Gauge head as illustrated in Figure 2-2. It may also be mounted to Endress+Hauser, Sakura, Tokyo-Keiso, Shand & Jurs, and Gauging Systems, Inc. float and tape gauges with the Endress+Hauser adapter shown in the following table.
4000 Installation 2.3 Warning! Grounding the Equipment The ATT must be grounded before communication and power connections are made. An external grounding lug is provided on the ATT. A connection from the ground lug to earth ground must be made before any other wiring connections are made. Note! For adequate/proper operation of the ATT lightning arrestor, a ground strap must be attached to the ATT. Grounding through mounting kits or pipe coupling is not adequate.
Installation Tank Gauge Transmitter Figure 2-3: ATT Field Terminal Block Wiring Terminal Block One TB1 Terminal Block Two TB2 1 L+ = ATTI expansion Bus + power 12 S = Space or EIA485 + 2 HPORT = ATTI bus HART Signal 11 M = Mark or EIA485 - 3 L- = ATTI expansion Bus power 10 B+ = ATT + power 4 C = RTD C lead 9 B - = ATT - power 5 B = RTD B lead 8 -- = Reserved 6 A = RTD A lead 7 -- = Reserved 2.4.
4000 Installation 2.4.5 ATT EIA485 Wiring The ATT uses a 2-wire EIA485 hardware interface to communicate with the Modbus master. EIA485 is a high speed differential communications network which allows up to 32 devices to operate on one network. The ATT and Modbus master share a twisted pair of wires to communicate. Figure 2-4 illustrates the typical EIA485 wiring.
Installation Tank Gauge Transmitter RTU 8130 Model 8130 with optional 48 VDC power supply. 110/220 VAC 50/60 Hz. Field Junction Box Area 0 RS232 To FuelsManager or other MODBUS master Area 1 Two 18 AWG twisted pair cables Host Computer Interface MODBUS interface is certified by Honeywell Model 4000 ATT Transmitters* RS232 serial port 50 feet max to FIC Field Junction Box EIA85 comm.
4000 Installation 2.4.6 ATT Mark/Space Wiring For an ATT using the Mark/Space field communications option, the following additional wiring connections must be made. (Refer to Input Power Wiring in Section 6 to determine the minimum wire size required.). See Figure 2-6. • Run two twisted pairs of 18 AWG wire (Mark/Space wires) into the ATT through the conduit entry along with the 48 VDC power wiring.
Installation 2.5 Tank Gauge Transmitter Connecting the RTD The following list shows how the ATT is wired to an RTD device. The ATT’s temperature circuit is designed to work with a platinum or copper 3-wire RTD. 2.5.1 Connecting the Handheld Terminal Figure 2-3 on page 6 shows how the 1200 Hand Held Terminal is connected to the ATTI bus on the ATT. The Model 268 can also be used to configure the ATT. Warning! The 1200 Hand Held Terminal on the ATT is not Intrinsically Safe.
4000 3 Configuration Configuration The Varec Model 4000 Advanced Technology Transmitter (ATT) must be configured for the specific tank, attached sensors, and host interface. This section provides 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. 3.
Configuration Tank Gauge Transmitter For example, to enter the alpha character "N"; first press the shift key, then press the number 4. To enter the alpha character "R"; first press the shift key, then press the number 1. Terminal Mode Configuration When the Model 1200 is connected to the ATTI Bus and turned on, a blank screen will appear on the Model 1200 after a self test sequence.
4000 Configuration ON / OFF Previous Function Shift Figure 3-3: 1200 Hand Held Terminal 3.3 Terminal Mode Operation The 1200 Hand Held Terminal is used to scroll through the various ATT menus. Basic scroll and selection operations are performed using the four function keys (F1 through F4) immediately below the display. Line 1 of the display contains the menu title. Lines 2 and 3 are item display lines. Line 4 is an error message/status line.
Configuration 3.4 Tank Gauge Transmitter Menu Operation For example, when the Main Menu is displayed on the top line, pressing F1 (Up) will scroll up through the possible main menu selections while pressing F2 (Down) will scroll down through the possible main menu selections. Pressing F4 (Enter) will cause the selection of the sub-menu displayed on lines two and three (such as Config Menu).
4000 Configuration 3.4.1 Main Menu Main Menu Description Quick Setup2 Initializes the ATT configuration parameters to a variety of preset configurations. Eng Frac 1900, Eng Dec 1900, 0-30 m 1900, 0-20m 1900, Eng Frac 1800, Eng Dec 1800, 0-30 m 1800, 0-20m 1800, Imperial Modbus, or Metric Modbus are valid. Use F1/F2 keys to select. See section below for details.
Configuration Tank Gauge Transmitter 3.4.2 Summary Menu Summary Menu Description Level Current level. Temperature Current temperature RTD Resistance RTD resistance measured Cfg Error Type Configuration error type detected. Power Log Number of times unit has gone through a power down cycle since it was last configured. Going into Alter Mode and using 'Exit and Save' resets this value to 0. Bad CPU Board Stat3 Bad CPU Board Stat3True if the RAM, ROM, or EEPROM are bad.
4000 Configuration 3.4.3 Configuration Menu Configuration Menu Description Level Units Level units used for display and Modbus data. FT-IN-16TH, M, or FT are valid. Use F1/F2 to select. Temp Units Temperature units used for display and Modbus data. F, C, or K are valid. Use F1/F2 to select. Level Sensor Direction of gauge. Forward/Reverse Calib Level2 Command used to calibrate to a new level. Pressing F4 causes ATT to ask for the current level to be entered.
Configuration Tank Gauge Transmitter 3.4.4 Host Menu Host Menu Description Type Type of host communication interface. Modbus or Mark/Space. Use F1/F2 to select. Mark/Space Adr4 Address of ATT on Mark/Space bus. 0-999 is valid. Low Speed Whether or not to use low speed on Mark/Space bus. Yes or No is valid. 4 Xmtr to Sim4 Type of Mark/Space transmitter to simulate. 1800 or 1900 are valid. Use F1/F2 to select. Encoder to Sim4 Type of level encoder to simulate on the Mark/Space bus.
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 configured quickly and with some defaults. It is NOT likely that this configuration will match your installation exactly.
Configuration Tank Gauge Transmitter 3.5.
4000 Configuration 3.5.2 Imperial Decimal 1900 Quick Setup Defaults 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.
Configuration Tank Gauge Transmitter 3.5.3 0-20 Meter 1900 Quick Setup Defaults General Configuration Level Units Meters 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 Level Deadband 0.03 Critical High Temp 250.0 Advisory High Temp 250.
4000 Configuration 3.5.4 0-30 Meter 1900 Quick Setup Defaults 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 Temp 250.
Configuration Tank Gauge Transmitter 3.5.5 Imperial Fractional 1800 Series Transmitter Quick Setup The Imperial fractional 1800 quick setup selection establishes the same default parameters as the Imperial Fractional 1900 quick setup with the exception that the sensor to emulate parameter is the 1800 MWT. 3.5.
4000 Configuration 3.5.
Configuration Tank Gauge Transmitter 3.5.10 Metric Modbus Quick Setup Defaults General Configuration Level Units Meters 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 Level Deadband 0.03 Critical High Temp 250.0 Advisory High Temp 250.
4000 4 Maintenance and Troubleshooting Maintenance and Troubleshooting 4.1 Maintenance The Varec Model 4000 Advanced Technology Transmitter (ATT) is designed and manufactured to provide accurate and reliable operation without a requirement for regularly scheduled maintenance. Due to the modular construction of the ATT, necessary repairs can be quickly and safely accomplished. Caution! 4.
Maintenance and Troubleshooting 4.3 Tank Gauge Transmitter Troubleshooting The ATT has provisions for hardware alarm inputs, software generated setpoint alarms, and other alarm conditions. Alarm and error status conditions are available to the Model 1200, to the host Computer, and to the optional ATT display. When in the Model 1200 display mode, the Diagnostic Status Menu displays only active alarm and error status conditions. General status conditions such as HW IN 1 are always displayed. 4.3.
4000 Maintenance and Troubleshooting 4.4 ATT Status Conditions The ATT provides the following general status condition. Status Condition Description FIELD CONFIG MODIFIED Set when the configuration is modified from the Model 1200. This status condition will only be available to the host computer and will not appear on the Model 1200. 4.5 ATT Configuration Error Checking The ATT performs extensive integrity checking on the configuration data before it uses it for calculations.
Maintenance and Troubleshooting 4.6 Tank Gauge Transmitter Model 1200 Error Messages The following error messages can be encountered while using the Model 1200. Error Message Description INVALID ANSWER The operator was expected to enter either a 'Y' for yes or an 'N' for no and something different was entered. INVALID FLOAT The operator entered an invalid floating point number. The proper format for floating point entry is [spaces][sign]number['.
4000 5 Specifications Specifications 5.1 Specifications and Physical Characteristics The following specifications apply to the Varec Model 4000 Advanced Technology Transmitter assembly over the operating temperature range. 5.1.1 Environmental Item Specification Temperature -40 oC to +85 oC (operating) Humidity -0 to 95% (non-condensing) Transient Lightning Meets ANSII/IEEE C62.41 EMI Meets SAMA 33.1C Vibration Shock Meets SAMA PMC 31.1 5.1.
Specifications Tank Gauge Transmitter 5.1.4 Level Measurement Item Description Resolution 0.04 in (1.
4000 Specifications 5.2 Safety Agency Approvals 5.2.1 Explosion Proof The HART Level Encoder is designed to meet the following safety agency approval requirements for explosion proof installations: Agency Acronym 5.2.2 Agency Requirement (FM) Factory Manual Approval StandardClass 3600, 3615, 810 (CSA) Canadian Standards Association Standard C22.2No. 0.0, 0.2, 0.4, 0.
Specifications 5.3 Tank Gauge Transmitter Major System Assemblies and Components The major assemblies and components for the Model 4000 are identified in the following table and illustrated in Figure 5-1.
4000 6 Order Codes Order Codes 10 20 30 N4000 - Communications GE GPE Loop Communication MX Mark Space Matrix (1600/1700) TI TIWAY Communication WB Whessoe Bus Current Loop (1315) GM GSI Type MODBUS 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.
Order Codes 36 Tank Gauge Transmitter Installation and Operations Manual
4000 7 Theory of Operation Theory of Operation 7.1 Overview The Advanced Technology Transmitter (ATT) represents a flexible system for use in liquid level measurement and/or other measurement applications. The Advanced Technology Transmitter (ATT) collects measurement information from compatible devices and transmits this information over a field communications bus.
Theory of Operation 7.3 Tank Gauge Transmitter 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 allow a host computer to read them. Control of status outputs will also be available to a host via Modbus registers. This unit is currently under development. 7.
4000 Theory of Operation 7.7 Encoder Battery Backup The ATT includes battery backup for the encoder. This allows level to be maintained across a power failure. Several consideration are made to protect the battery from being fully discharged. 1. The battery must be physically enabled by the microprocessor. This allows the battery to be shipped connected without being discharged. 2. Service personnel can turn the battery off.
Theory of Operation Tank Gauge Transmitter Function Number Function 01 Read Digital Outputs 02 Read Digital Inputs 03 Read Analog Output Registers 04 Read Analog Input Registers 05 Write Single Digital Output 06 Write Single Analog Output Register 08 Loopback Test 15 Write Multiple Digital Outputs 16 Write Multiple Analog Output Registers 65 Read Floating Point Registers 66 Write Floating Point Registers Table 7-1: Modbus Functions Number Exception 01 Illegal Function 02 Ill
4000 Theory of Operation 7.11 Modbus Support over Mark/Space Host Interface The ATT permits Modbus communications over the Mark/Space data highway. The Modbus request message is placed into a Mark/Space message frame. The ATT processes the request message and places the Modbus reply in a Mark/ Space reply frame. This option is only available with systems using the Model 6840 Tank Polling Unit. 7.
Theory of Operation 42 Tank Gauge Transmitter Installation and Operations Manual
4000 8 ATT Family of Products ATT Family of Products The ATT product family consists of the 4000 ATT, the Model 4040 Display Unit, and the Model 4050 Digital Input/ Output Unit.
ATT Family of Products 8.2 Tank Gauge Transmitter Model 4050 Digital Input/Output Unit The Model 4050 is a digital I/O unit. It includes four digital contact closure outputs and four digital inputs. It operates connected to and is powered from the ATTI bus. The unit is mounted in a round explosion proof junction box. Three 3/4-inch conduit entries are available. • Primarily configured by jumpers. Three sets of jumpers are used. • Unit address: 4 jumpers for range 0-15.
4000 9 Modbus Implementation Modbus Implementation 9.1 Introduction This protocol guide explains the operation of the Modbus protocol as described in the following Modicon document: PI-MBUS-300 Rev B (1985) implemented in the Varec Model 4000 Advanced Technology Transmitter (ATT). 9.2 Implementation The implementation of the Modbus protocol for the ATT provides a standard form of digital communications.
Modbus Implementation Function Code Tank Gauge Transmitter Function Information Type Modbus Nomenclature 01 Read Bits Read output status 02 Read Bits Read input status 03 Read Integer, Code, Status word, Floating point Read output registers 04 Read Integer, Code, Status word, Floating point Read input registers 05 Write Bits Force single output status 06 Write Integer, Code, Status word Preset single register 08 n/a Repeat of Loopback Message Loopback test 15 Write Bits
4000 Modbus Implementation 9.4 Functions and Data Formats The Modbus data in the ATT is arranged in integer registers, floating point registers, and status 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 available today, the ATT supports two floating-point data formats: a two 16bit register format and a one 32-bit register format.
Modbus Implementation Note! Tank Gauge Transmitter In all of the following communication examples, the error check value is dependent upon the mode of transmission. 9.5.1 Integer Data The integer data is a whole number between 0 and the maximum Modbus integer (inclusive). The maximum Modbus integer is a user-configurable variable that is a whole number between 0 and 65,535 (inclusive).
4000 Modbus Implementation 9.5.2 Integer Data • Hexadecimal representation • 4124Decimal equivalent: 16,676 The data returned for data 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 the maximum Modbus integer + 1 is returned. Writing to dynamically calculated parameters has no effect on those parameters. 9.5.
Modbus Implementation Tank Gauge Transmitter 9.5.4 Coded Data Coded data represents a table look-up value. Data written to these registers must be a valid table entry. Invalid data may cause a Configuration Error to occur. The following example shows coded data at data address 20 (0014 Hex) representing level units. The value 2 (0002 Hex) returned from the ATT corresponds to level units = FT-IN-16TH.
4000 Modbus Implementation 9.6 Floating-Point Registers Although not part of the Modbus protocol specification, floating point 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 ATT that are not easily scaled (such as the scaling factors themselves). 9.6.
Modbus Implementation Tank Gauge Transmitter 9.6.4 The One 32-bit Register 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 shown below with the a temperature of 100.0 degrees is being read from register 1 (0001 Hex).
4000 Modbus Implementation 9.7 Status 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 represented by a "1". The status bits may be read with function code 1 or 2. They may be written one at a time with function code 5 or multiple bits may be written with function code 15. An example of a read message for bits 2 through 6 as returned by the ATT is shows as follows.
Modbus Implementation 9.9 Tank Gauge Transmitter Data Out of Range When integer data calculated by the ATT is outside the minimum or maximum scale points or is otherwise out of range, the value returned is that of the maximum Modbus integer + 1. For example, if the maximum Modbus integer is 65,534 (as used in our previous examples) the "data out of range" value is 65,535. The "data out of range" convention does not apply to the status bits, packed status bits, character data, and coded data.
4000 Modbus Implementation 9.12 Integer Register Map Register Number Type 0 Scaled Level 1 Scaled Temperature 2 Reserved 3 Reserved 4 Reserved 5 Bit Field 6 Bit Field Description AimStat Bit 0 1 2 3 Usage CRIT LO LEVEL ADV LO LEVEL ADV HI LEVEL CRIT HI LEVEL 4 5 6 7 8 9 10 CRIT LO TEMP ADV LO TEMP ADV HI TEMP CRIT HI TEMP HW IN 1 HW IN 2 ..
Modbus Implementation Tank Gauge Transmitter Register Number Type 8 9 Reserved Code 10 11 12 13 14 15 16 17 18 19 Scaled Scaled Scaled Scaled Scaled Scaled Scaled Scaled Scaled Scaled Description 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 Deadband Crit Low Temp Setpoint Adv Low Temp Setpoint Adv High Temp Setpoint Crit High Temp Setpoint Temp Deadband 56 20 Code Level Units 0 - METERS 1 - FEET 2
4000 Modbus Implementation Register Number Type 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...
Modbus Implementation Tank Gauge Transmitter Register Number Type 223 224 225 226 Reserved Reserved Code Code 227 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 Float Float Reserved Float Float Description Damping Value A/D Noise Reject: Type 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 Hig
4000 Modbus Implementation 9.13 Floating Point Register Map Register Number Description 0 1 2 3 4 5 6 7 8 9 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 Deadband Min Level Max Level Min Temp Max Temp Reserved Man Temp Calib Level 9.14 Status Bit Register Map Register Number Description 0..
Modbus Implementation 60 Tank Gauge Transmitter Installation and Operations Manual
4000 Optional Interfaces 10 Optional Interfaces Our intent with these optional interfaces is enabling the ATT to coexist along side older VAREC style and competitor gauging systems and transmitters. This allows the user upward migration to modern gauging systems such as the RS485 signal interface utilizing the MODBUS register set protocol. When ready to migrate to modern systems, a simple exchange of the ATT communications module is required. 10.
Optional Interfaces Tank Gauge Transmitter 10.5 4000WBFMO This option can co-exist along side Whessoe Bus™ transmitters, the signal format is a current loop style transmission signal. Transmitter is user selectable between 1 and 127 with basic baud rates stop and parity bits. The protocol is referred to as Whessmatic 550, which was widely used by the UK for their Intelligent Tang gauging systems.
4000 Glossary Adv Hi Level Advisory High Level alarm set point. When the product level exceeds this point an advisory alarm will be generated. Adv Hi Temp Advisory High Temperature alarm set point. When the product temperature exceeds this point an advisory alarm will be generated. Adv Lo Level Advisory Low Level alarm set point. When the product level drops below this point an advisory alarm will be generated. Adv Lo Temp Advisory Low Temperature alarm set point.
Tank Gauge Transmitter DBAND Deadband. ft-in-16 Feet-inches-1/16 of an inch. Imperial fractional measurement. oF Fahrenheit. A unit of measure for temperature readings. 0 oC = 32 oF. A temperature of 32 oF is the freezing point of water, 212 oF is the boiling point of water. Host A tank data acquisition system responsible for collecting and processing information from a number of subordinate devices. IEEE Institute of Electrical and Electronic Engineers.
4000 TSU Tank Polling Unit. A Varec interface unit that allows a host computer to interface to Varec Mark/Space, Remote Selector, IFU, and Matrix field interfaces.
Tank Gauge Transmitter 66 Installation and Operations Manual
4000 NOTES 67
Your official representative Your offical representative www.varec.com Varec, Inc. 5834 Peachtree Corners East, Norcross (Atlanta), GA 30092 USA Tel: +1 (770) 447-9202 Fax: +1 (770) 662-8939 © 2004 Varec, Inc. All Rights Reserved. This document is for information purposes only. Varec, Inc. makes no warranties, express or implied, in this summary. The names of actual companies and products mentioned herien may be the trademarks of their respective owners.
