4590 TSM (v2.03) Service Manual for GPE
Contents
1. Reply Message for Function LTA Reply Byte Reply Type Short Long 1mm 1 Address 1 Address 1 Address 1 2 Address 10 Address 10 Address 10 3 Level 0 01 Fine Level 0 001 Level 0 0001 4 Level 0 1 Fine Level 0 01 Level 0 001 5 Level 1 Fine Level 0 1 Level 0 01 6 Level 10 Course Level 0 1 Level 0 1 7 Level 100 Course Level 1 Level 1 8 Temp 1 Course Level 10 Level 10 9 Temp 10 Course Level 100 Level 100 10 Temp 100 Temp 1 Temp 0 1 11 4 20 mA 0 01 Temp 10 Temp 1 12 4 20 mA 0 1 Temp 100 Temp 10 13 4 20 mA 1 4 20 mA 0 01 Temp 1007 14 4 20 mA 10 4 20 mA 0 1 4 20 mA 0 01 15 4 20 mA 1 4 20 mA 0 1 16 4 20 mA 10 4 20 mA 1 17 4 20 mA 10 18 4 20 mA 100 19 4 20 mA 100 1 This level value can only be 0 or 1 Bit 2 if set indicates an additional 0 005 should be added to the value Bit 3 if set indicates the discrete output is closed 2 This level value can only be 0 or 1 Bit 3 if set indicates the discrete output is closed 3 This temperature value can only be between 0 and 7 Bit 3 if set indicates the value is a ve temperature 4 This 4 20 MA value can only 0 or 1 Bit 1 if set indicates the value is a ve one Long Reply Additional Information In the long reply the level is sent as two components This method is used due to the mechanical nature of the old devices which employ this protocol 15 GPE Message Formats Table 6 5 Long Reply Additional Information 4590 When the 45902. 10 km GPE Master Unit Figure 3 1 Ser al Connection Topology for the GPE Protocol Installation Recommendations 4590 6 Service Manual Tank Side Monitor Configuration 4 Configuration The GPE port on the 4590 TSM must be configured to establish communication The local 4590 TSM display or ToF tool allows the user to set up the GPE parameters needed for correct communication with a GPE master unit 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 99 and must be unique for each GPE device on a loop A 4590 TSM unit only responds to requests that contain the same Address and Communication ID that the unit is set to 4 2 Configuration Settings To achieve successful communication on a GPE loop a number of configuration settings must be entered to match the configuration of the loop 4 2 4 Summary of Configuration Parameters Table 4 1 summarizes the configuration parameters required by the 4590 TSM Table4 1 GPE Configuration Information Configuration Parameter Valid Entries Default ID 0 99 1 Baudrate 250 350 baud 300 Type Short Reply Long Reply Short Reply e 1mm Reply Loop Mode e Not Checked Not Checked e Checked Loop Number 0 4 0 Long Reply Type e Typel Type2 Type 1 e Type 3 4 20 mA Ref
3. 2 Description of Configuration Parameters LL 8 5 MeasuredValues eee 11 5 1 Measured Value RangeS 0 eee eee 11 5 2 Measured Value Error Handling 0 cece ee eee 11 6 GPE Message Formats 13 6 1 Physical Layer 13 6 2 Request Message L eee 13 6 3 Reply Message escris renerrien eee 14 6 3 1 Reply to Functions LT LTG and LTO 00 00 14 6 3 2 Reply to Functions LTA LL 15 6 3 3 Long Reply Additional Information LL 15 Contents 4590 Service Manual Tank Side Monitor Introduction 1 Introduction This protocol guide explains the operation of the GPE protocol per Modicon document PI MBUS 300 Rev C 1991 implemented in the Varec 4590 Tank Side Monitor TSM Introduction 4590 2 Service Manual Tank Side Monitor Implementation 2 Implementation The implementation of the GPE protocol for the 4590 TSM provides a standard form of digital communication via a current loop An effort has been made to provide the most complete and functional GPE implementation in the 4590 TSM in order to communicate with existing GPE 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 application exceptions have been made and noted Note There is no guar
4. LT LTG and LTO Table 6 3 Reply Message to Functions LT LTG and LTO Reply Byte Reply Type Short Long 1mm 1 Address 1 Address 1 Address 1 2 Address 10 Address 10 Address 10 3 Level 0 01 Fine Level 0 001 Level 0 0001 4 Level 0 1 Fine Level 0 01 Level 0 001 5 Level 1 Fine Level 0 1 Level 0 01 6 Level 10 Course Level 0 1 Level 0 1 7 Level 100 Course Level 1 Level 1 8 Temp 1 Course Level 10 Level 10 9 Temp 10 Course Level 100 Level 100 10 Temp 100 Temp 1 Temp 0 1 11 Temp 10 Temp 1 12 Temp 100 Temp 10 13 Temp 100 1 This level value can only be 0 or 1 Bit 2 if set indicates that an additional 0 005 should be added to the value Bit 3 if set indicates the discrete output is closed 2 This level value can only be O or 1 Bit 3 if set indicates that the discrete output is closed 3 This temperature value can only be between 0 and 7 Bit 3 if set indicates that the value is a ve temperature 14 Service Manual Tank Side Monitor 6 3 2 Reply to Functions LTA 6 3 3 GPE Message Formats The reply message from the 4590 TSM for function LTA differs not only in the contents but also by the value of the upper bits of the characters which are all 0x20 However the replies differ depending on the Device Type selected Table 6 4 summarizes the reply message for function LTA Table 6 4
5. List of TSM Parameters IS Al Input Value Contact Ref DIO x or Alarms IS DI 1 Input Value Conv Fact Adj 0 5 1 5 1 0 Configuration 4 2 2 4590 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 Field Description Loop Number 3107 The loop parameter forms a second part of the identification of a message If enabled see Loop Mode parameter it is compared with the value in the received message The message is only processed if they match This is a unique number for this device on the GPE loop Only when ip 4210 the 4590 TSM receives a request message with this number is a response generated Baudrate 212 Specifies the communication speed used on the GPE loop Type Specifies the format of the response generated by the 4590 TSM Indicates if the loop value within the request message should be Loop Mode 1 evaluated or not If not the 4590 TSM responds to all messages with its ID number no matter which loop number is in the request Long Reply Type The value determines how the Level 0 1 value is encoded into the reply Fine Level 0 1 and Course Level 0 1 digits See Table 6 5 Long Reply Additional Information for more details 4 20 mA Ref This parameter is used to connect a calculated or measu
6. SRM013FVAE0808 4590 Tank Side Monitor i GPE 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 TankWayGis a registered trademark of L amp J Technologies 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
7. TSM is used in this mode Table 6 5 summarizes the long reply additional information Long Reply Type 1 2 Fine Level 0 001 Level 0 001 Fine Level 0 01 Level 0 01 Fine Level 0 1 0 Level 0 1 Level 0 1 Course Level 0 1 Level 0 1 0 Level 0 1 Course Level 1 Level 1 Course Level 10 Level 10 Course Level 100 Level 100 The Long Reply Type parameter allows you to adjust the layout so that when the two values Fine and Course are combined in the control system an accurate level can be obtained 16 Service Manual Tank Side Monitor NOTES 17 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
8. antee that the interpretation made here is the same as that followed by the GPE master The GPE protocol supports three modes of communication and within each mode four commands o gt Temperature O o gt 4 20mA Ref o gt Contact Ref Figure 2 1 Function Block GPE Output 2 1 GPE Modes Device Types Table 2 1 summarizes the GPE Modes Device Types used by the 4590 TSM Table 2 1 GPE Modes Device Types Device Type 23111 Description Short Reply New GPE Protocol used by devices which incorporate a microcontroller Long Reply Old GPE Protocol used by older hardware controlled systems 1 mm Reply Expanded Protocol for higher measurement resolution 2 2 GPE Functions Table 2 2 summarizes the GPE Functions used by the 4590 TSM Table2 2 GPE Functions Function Description LT Used to obtain Level and Temperature LTA Used to obtain Level Temperature and 4 20 mA Value LTC Used to close a discrete contact and obtain Level and Temperature LTO Used to open a discrete contact and obtain Level and Temperature 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 GPE protocol variant Connect the gauges using a serial topology as shown in Figure 3 1 The maximum advised cable length is
9. he value sent on the gus is affected The displayed value and value used for internal calculations are not changed by this parameter The control room will have the correct value after the conversion See Table 4 3 Conversion Table for more information Table 4 3 summarizes the conversion table used before sending the GPE bus to the control room Table 4 3 Conversion Table CFA 1 000 CFA 1 016 Remarks FMR Value 2 540 m 2 540 m 4590 TSM Displayed Value 8 333 ft 8 333 ft 1 ft 0 3048 m Value Sent to GPE Loop 8 333 8 466 value CFA Control System Value 2 500 m 2 540 m 1ft 0 3m Configuration 4590 10 Service Manual Tank Side Monitor Measured Values 5 Measured Values 5 1 Measured Value Ranges The GPE response contains two or three measurement values 1 Level 2 Temperature 3 4 20 mA value LTA function only Depending on the setting of the GPE parameters these values are subject to the following limits Table 5 1 GPE Response Measurement at Value Reply Type Description of Value Short Long 1 mm Level 0 000 0 000 0 0000 Value of the Tank Corrected Level 199 995 199 999 199 9999 in the current Tank Level Units Temperature 799 799 799 9 Tank Temp in the current Tank 799 799 799 9 Temp Units 4 20 mA 19 99 19 99 1999 99 Value of linked parameter in its 19 99 19 99 1999 99 current uni
10. ness for a particular purpose In no event shall 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 Contents T lAFOdUueton EE ps one eat 1 2 Implementation esses 8 2 1 GPE Modes Device Types 0000 c cee nennen 3 22 GPE FUNCIONS ta be ERE Peu as Lei dus 3 3 Installation Recommendations 5 4 Configura Ss scritte lati ae ace en baee m 7 44 Address ono as ee ERROR eT EVO ER bela 7 4 2 Configuration Settings 7 4 2 1 Summary of Configuration Parameters LL 7 4 2
11. red value within the 4590 TSM to this part of the response message There are specific limitations on the range of values which can be transmitted Contact Ref 9222 This parameter selects the discrete output which is controlled by the LTC and LTO commands The status of this output is also returned as part of the 4590 TSM response message Service Manual Tank Side Monitor Configuration Field Description Conversion Factor Adj ust 9 23 This parameter allows the level value transmitted on the GPE bus to be adjusted to compensate for inaccuracies in the control room equipment during unit conversion GPE Loop feet cia RTG TSM PE Loop Control System Interface meters Figure 4 1 Example In this example the 4590 TSM will be set to feet as the GPE loop is working in feet The 4590 TSM will convert the level from the 7200 7500 series Radar Tank Gauges using the correct conversion factor 1 ft 0 3048 m However the GPE Loop Interface to the Control System may use an inaccurate conversion 1 ft 0 3 m To compensate for this inaccuracy the Conversion Factor Adjustment CFA value is set as follows CFA accurate conversion factor inaccurate conversion factor 0 3048 0 3 1 016 The 4590 TSM multiplies its value in by this adjustment value before sending the GPE bus Note Only t
12. sage The request message is a sequence of three characters sent from the control room These characters encode the loop number the device whose data is requested and which GPE function is to be executed Table 6 1 summarizes the request message sequence of three characters sent from the control room Table 6 1 Request Message Byte Bits 0 3 Bits 4 6 or 7 Description 1 Oto 4 0x20 Loop Number 2 0 to 9 0x40 0x70 Address 1 3 0 to 9 0x40 0x70 Address 10 The value of the upper bits in the 2 and 3 byte describes the GPE function to be executed as shown in Table 6 2 Table 6 2 GPE Function to be Executed Bits 4 6 or 7 Function Description 0x40 LTA Return Level Temperature and 4 20 mA Value 0x50 LT Return Level and Temperature 0x60 LTC Close the discrete output and return level and temperature 0x70 LTO Open the discrete output and return level and temperature 13 GPE Message Formats 4590 6 3 Reply Message 6 3 1 The reply message from the 4590 TSM depends on the function requested by the control room and the Device Type configuration parameter of the 4590 TSM Reply to Functions LT LTG and LTO The reply message from the 4590 TSM is the same for functions LT LTC and LTO The upper bits of the characters are all 0x30 However the replies differ depending on the Device Type selected Table 6 3 summarizes the reply message to functions
13. ts 1 Resolution of all values is one significant figure of the specific units except for Level Short 2 The smallest unit of level increment is 0 005 of the specific units 3 If the units are ft in 16 or ft in 8 the value of Level is in decimal ft 5 2 Measured Value Error Handling The following error handling rules are applied to all values returned in the GPE message 1 If a value level temperature or 4 20 mA is below the minimum value the mini mum value is returned 2 If a value level temperature or 4 20 mA is above the maximum value the max imum value is returned 3 ifavalue level temperature or 4 20 mA is undefined invalid or offline the max imum value is returned 11 Measured Values 4590 12 Service Manual Tank Side Monitor GPE Message Formats 6 GPE Message Formats 6 1 Physical Layer The GPE communication takes place on a 20 mA current loop Bits are represented by current flowing not in the loop These bits are generated and interpreted by a standard serial communication controller UART running at the selected baud rate and communication settings Each group of bits together with the start stop and parity represents an ASCII character forming the elements of the messages Within each character bits 0 to 3 are used to encode decimal values The remaining 3 or 4 bits are used to provide additional information 6 2 Request Mes
14. warranties set out in this instruction manual The 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 fit
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