4590 TSM (v2.03) Service Manual for Mark/Space
Contents
1. Bit Description 1 Start bit 2 3 Unused bit 4 7 Device ID 100 bit 8 is the least significant of the BCD digit 8 11 Device ID 10 bit 12 is the least significant of the BCD digit 12 15 Device ID 1 bit 16 is the least significant of the BCD digit 16 First data bit is always O 17 37 Level Data 38 Alarm 1 state of Alarm Ref 2 39 Alarm 0 state of Alarm Ref 1 40 55 Temperature Data 56 Parity bit 12 Service Manual Tank Side Monitor Level Data Mark Space Message Formats The level data part of the reply from the 4590 TSM consists of 21 bits of information arranged as follows depending on the Data Mode setting Table 6 4 Data Mode Fractional Bit Description 16 First data bit is always 0 17 19 10 Feet 20 23 1 Foot 24 27 Inches 28 31 16 inch 32 37 Filled with zeros Table 6 5 Data Mode Decimal Bit Description 16 First data bit is always 0 17 19 10 Feet 20 23 1 Foot 24 27 0 1 Feet 28 31 0 01 Feet 32 37 Filled with zeros Table 6 6 Data Mode 20 m Bit Description 16 10 Meters 17 20 1 Meter 21 24 0 1 Meters 25 28 0 01 Meters 29 32 0 001 Meters 33 37 Filled with zeros Table 6 7 Data Mode 30 m Bit Description 16 17 10 Meters 18 21 1 Meter 22 25 0 1 Meters 26 29 0 01 Meters 30 33 0 001 Meters 34 37 Filled with zer2. Measured Value Ranges teen e eee 9 Measured Values Error Handling 0 00 eee ee eee 9 Mark Space Message Formats 11 Physical EE 11 Request Message 11 Reply Message 11 Contents 4590 Service Manual Tank Side Monitor Introduction 1 Introduction This protocol guide explains the operation of the Mark Space protocol implemented in the Varec 4590 Tank Side Monitor TSM Introduction 4590 2 Service Manual Tank Side Monitor Implementation 2 Implementation The implementation of the Mark Space protocol for the 4590 TSM provides a standard form of digital communication via a voltage mode bus An effort has been made to parallel current implementations to the greatest extent possible so that the 4590 TSM communicates with existing Mark Space masters Check compatibility carefully to ensure that the 4590 TSM is properly configured for the data format expected by the host system or computer Due to the unique application requirements of the 4590 TSM exceptions have been made and noted Note There is no guarantee that the interpretation made here is the same as that followed by the Mark Space master The Mark Space interface supports two types of communication which are based on the emulation of older devices Table 2 1 lists the two Types of Communication supported by the Mark Space interface Table 2 1 Mark Space Types Device Ty
3. 00 STG 5 8 Device ID 100 bit 8 is the least significant of the BCD digit 9 12 Device ID 10 bit 12 is the least significant of the BCD digit 13 16 Device ID 1 bit 16 is the least significant of the BCD digit 6 3 Reply Message The reply message from the 4590 TSM depends on the Mark Space interface settings of the 4590 TSM 40 bit Response if Temperature No Temp If the Temperature parameter is set to No Temp the reply from the 4590 TSM consists of 40 bits of information Table 6 2 summarizes the Reply Message from the 4590 TSM Table 6 2 Reply Message if Temperature No Temp Bit Description 1 Start bit 2 3 Unused bit 4 7 Device ID 100 bit 8 is the least significant of the BCD digit 8 11 Device ID 10 bit 12 is the least significant of the BCD digit 12 15 Device ID 1 bit 16 is the least significant of the BCD digit 11 Mark Space Message Formats 4590 Bit Description 16 First data bit is always 0 17 37 Level Data 38 Alarm 1 state of Alarm Bit 2 39 Alarm 0 state of Alarm Bit 1 40 Parity bit 56 bit Response if Temperature With Temp If the Temperature parameter is set to With Temp the reply from the 4590 TSM consists of 56 bits of information Table 6 3 summarizes the Reply Message from the 4590 TSM Table 6 3 Reply Message if Temperature With Temp
4. SRMOO9FVAE0808 4590 Tank Side Monitor Mark Space Communication Protocol Service Manual Software Version v2 03 www varec com Varec Inc 5834 Peachtree Corners East Norcross Atlanta GA 30092 USA Tel 1 770 447 9202 Fax 1 770 662 8939 Tank Side Monitor 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 30092 USA Trademarks acknowledged Varec Inc recognizes all other trademarks Trademarks of other products mentioned in this document are held by the companies producing them Varec is a registered trademark of Varec Inc Copyright 2003 Hart is a registered trademark of HART Communication Foundation Austin TX USA Disclaimer of Warranties The contract between the Seller and the Buyer states the entire obligation of the Seller The contents of this instruction manual 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 instruction manual T
5. cessful communication on a Mark Space bus a number of configuration settings must be made to match the configuration of the bus 4 2 1 Summary of Basic Configuration Parameters Table 4 1 summarizes the configuration information required by the 4590 TSM Table 4 1 Mark Space Configuration Parameters Configuration Parameter Valid Entries Default ID e 0 999 1 Type e 1900 1900 e 1800 Baudrate e High High Low Data Mode e 20m e 30m A 20 m e Decimal e Fractional Temperature e With Temp With Temp e No Temp TempOffset Enable Disable e Disable Alarm Ref 1 Any Discrete Value IS Digital In 1 Alarm Ref 2 Any Discrete Value IS Digital In 2 Configuration 4590 4 2 2 Description of Configuration Parameters Table 4 2 summarizes the configuration parameters that make up the Basic Setup The numbers in parentheses indicate the menu position Table 4 2 Submenu Basic Setup 9 Field Description Default Protected 1D 4211 This is the identifier value The 4590 TSM responds to requests 1 W amp M Switch which contain this identifier value 9212 7 Baud Rate Selects which of the possible baud High WEM Switch rates communication should work Type 213 Indicates which Mark Space device Device Type the 4590 TSM emulates 1900 Kees 9214 Data Mode Indicates which type of data format 20 m WEM Switch is used in the reply 9215 Te
6. ervice Manual Tank Side Monitor Measured Values 5 Measured Values 5 1 Measured Value Ranges The Mark Space response contains two measurement values level and temperature as well as two alarm bits indicating the status of the two 4590 TSM discrete IOs Depending on the setting of the Mark Space parameters these values are subject to the following limits Table 5 1 Mark Space Response Measured Value Mode Type Value Range Units Level Fractional 0 0 0 to 79 11 15 ft in 16 Decimal Comes E ETE 20 meters 0 0t019999 m 30 meters 0 0 to 32 699 m Temperature 2 1800 199 9 to 199 9 Tank Temp Units 1900 Ir 799 9 to 799 9 Tank Temp Units Tank Temp Units Alarm 0 State Alarm Ref 1 Alarm 1 State Alarm Ref 2 1 The level is obtained from the Level value 2 The temperature is obtained from the TANK Temperature value Refer to Chapter 6 Mark Space Message Formats for a detailed description of the message formats 5 2 Measured Values Error Handling The following error handling rules are applied to all values returned in the Mark Space message Refer to Table 5 1 for the related minimum and maximum value ranges 1 If the Level is not valid or is outside of the value range shown an illegal gray code is transmitted in the level position of the reply For details see Chapter 6 Mark Space Message Formats 2 If the Temperature is greater
7. he only warranties that apply are those in the existing contract between the Seller and Buyer The Varec 4560 Servo Gauge Monitor has not been tested by Varec under all possible operational conditions and Varec may not have all the data relative to your application The information in this instruction manual is not all inclusive and does not and cannot take into account all unique situations Consequently the user should review this product literature in view of his her application If you have any further questions please contact Varec for assistance Limitations of Seller s Liability In the event that a court holds that this instruction manual created some new warranties Seller s liability shall be limited to repair or replacement under the standard warranty clause In no case shall the Seller s liability exceed that stated as Limitations of Remedy in the contract between the Seller and Buyer Use of parts that are not manufactured or supplied by Varec voids any Varec warranty and relieves Varec of any obligation to service the product under warranty Varec recommends the use of only Varec manufactured or supplied parts to maintain or service Varec 4560 Servo Gauge Monitors Terms of Use The information provided in this document is provided as is without warranty of any kind Varec Inc disclaim all warranties either express or implied including the warranties of merchantability and fitness for a particular purpose In no event shal
8. l Varec Inc or its suppliers be liable for any damages whatsoever including direct indirect incidental consequential loss of business profits or special damages even if Varec Inc or its suppliers have been advised of the possibility of such damages 4590 This manual is solely intended to describe product functions and should not be used for any other purpose It is subject to change without prior notice This manual was prepared with the highest degree of care However should you find any errors or have any questions contact one of our service offices or your local sales agent On Safety and Proper Use Read this manual carefully and make sure you understand its contents before using this product Follow all instructions and safety guidelines presented in this manual when using this product If the user does not follow these instructions properly Varec cannot guarantee the safety of the system Service Manual Tank Side Monitor Contents 4 1 4 2 5 1 5 2 6 1 6 2 6 3 Contents Introduction EE 1 Implementation 0 0 00 cece 3 Installation Recommendations 5 Configuration ee ner 7 AMES is ees a o A Be Eee ar 7 Configuration Settings 222 cen sense nennen nennen nn 7 4 2 1 Summary of Basic Configuration Parameters 2 222 nne een 7 4 2 2 Description of Configuration Parameters 22222 nern 8 Measured Values 02 00 cece eens 9
9. mperature Indicates if a temperature will be with Temp WEM Switch Temperature Mode returned or not Temp Offset 9216 Indicates if the temperature value Temperature Offset returned should have the offset Enabled W amp M Switch applied to it Table 4 3 summarizes the configuration parameters that make up the Extended Setup Table 4 3 Submenu Extended Setup 224 Field Description Default Alarm Ref 14221 Reference to the parameter to be IS DI 1 Value Alarm Bit 1 Reference returned as the alarm bit 1 i Alarm Ref 2 222 Reference to the parameter to be IS DI 2 Value Alarm Bit 2 Reference returned as the alarm bit 2 Table 4 4 summarizes the configuration parameter that make up the Diagnostics Submenu Table 4 4 Submenu Diagnostics 9 Field Description Height of Bar 9231 Output Status The height of the bar represents the activity during the last second e Replied to Host largest bar The Communication Status Received Request for this 4590 TSM Graph CSG provides a simple graphical overview of communication between the gauges and the control Bytes were detected on the bus room e Bits were detected on the bus Smallest bar e Request for another gauge on the bus e Nothing detected no bar gap in graph Under normal operating conditions only the first three items should be seen with or without gaps 8 S
10. os Each level digit is encoded using reflected binary gray pulse coding 13 Mark Space Message Formats 4590 Temperature Data The temperature data part of the reply from the 4590 TSM consists of 16 bits of information arranged as follows depending on the Device Type setting Table 6 8 Temperature Data Bit Device Type 1800 Device Type 1900 40 Error bit Temperature 100 bit 0 41 Sign 1 ve Temperature Sign 1 ve Temperature 42 Unused Temperature 100 bit 1 43 Error bit Temperature 100 bit 2 44 47 Temperature 10 Temperature 10 48 51 Temperature 1 Temperature 1 52 55 Temperature 0 1 Temperature 0 1 1 These bits are inverted 14 Service Manual Tank Side Monitor NOTES 15 Your official 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 2006 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
11. pe Description 1900 Emulates the Model 1900 transmitter 1800 Emulates the Model 1800 transmitter Level O Temperature O O o Alarm Ref 1 O Alarm Ref 2 Figure 2 1 Function Block Mark Space Out Implementation 4590 4 Service Manual Tank Side Monitor Installation Recommendations 3 Installation Recommendations Follow these recommendations for field installation of the 4590 TSM with the Mark Space protocol variant e Use two twisted pairs of 18 AWG wire one power and one communication e Connect the units in parallel as shown in Figure 3 1 The maximum tested cable length is 8 km Mark Space Master Unit Figure 3 1 Mark Space Master Units Installation Recommendations 4590 6 Service Manual Tank Side Monitor Configuration 4 Configuration The Mark Space interface on the 4590 TSM must be configured to establish communication The local display or ToF tool allows the user to set the 4590 TSM Mark Space interface to match the Mark Space master settings 4 1 Address The 4590 TSM addresses provide unique identification for the host The 4590 TSM address is configured through the local display or ToF tool This address may range from 0 to 999 and must be unique for each Mark Space device on a bus Each 4590 TSM only responds when a query has been sent to its unique address by the host 4 2 Configuration Settings For suc
12. than the maximum shown e Device Type 1800 Bit 43 of the reply is set and the temperature value is ignored e Device Type 1900 The maximum value is returned 3 If the Temperature is less than the minimum shown e Device Type 1800 Bit 43 bit 40 of the reply are set and the temperature value is ignored e Device Type 1900 The minimum value is returned Measured Values 4590 10 Service Manual Tank Side Monitor Mark Space Message Formats 6 Mark Space Message Formats 6 1 Physical Layer The Mark Space communication takes place on a pair of voltage mode cables normally at 48 VDC one called Mark and the other called Space Bits are represented by either one or the other of these cables going low to 0 VDC logic 1 if it is the Mark line or logic O if it is the Space line The width of the pulses and the gaps between them are determined by the Mark Space Speed Mode parameter These bits are then assembled into message blocks 6 2 Request Message The request message is a sequence of 16 data bits sent from the control room These bits encode the device whose data is requested as well as special function bits for the 6500 Servo Tank Gauge STG Table 6 1 summarizes the Mark Space Request Message for the 6500 STG Table 6 1 Mark Space Request Message Bit Description 1 Start bit 2 Unused bit 3 Raise command for 6500 STG 4 Reset command for 65
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