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MTS Sensors Level Plus LP Series, Инструкция по интерфейсу

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15

Modbus Interface Manual

LP Series

Note:

The communications event log is not supported. The “Query data” field 
is irrelevant (normally, FF00H would clear the log).

 

If the device is in listen-only mode, the device responds to this  
message by switching out of listen-only mode - (resulting in no response 
being sent to the request).

If the device is not in listen only mode, it responds as follows:

Slave address: echoed
Function: 08H
Subfunction high: 00H
Subfunction low: 01H
Query data (16-bit): echoed (0000H or FF00H)
Error check: 16-bit CRC/8-bit LRC

Function 08 - Diagnostics
                      (Subfunction 04, Force Listen-Only Mode)

The device responds to this request by switching to listen-only 
mode. Messages are still received and parsed, but no responses 
are transmitted. To switch out of listen-only mode, issue a ‘

Restart 

Communications Option

’ request (function 08, subfunction 01) or 

cycle power.

Function 16 - Preset Multiple Registers 

The device response returns the slave address, function code, starting 
address, and quantity of registers preset.

Function 17 - Report Slave ID 

The device responds to this request with the following data:

Slave address: echoed
Function: 11H
Byte count: 05H
Slave ID: FFH
Run indicator status: FFH (ON)
Additional data: ‘DMS’
Error check: 16-bit CRC/8-bit LRC

Modbus Exception Codes

The following standard Modbus exceptions are implemented:

Error code 01 (Illegal Function) 

Reported when:

 

»

A function other than 03, 04, 06, 08, 16 or 17 is requested

 

»

Function 08 is requested, and a subfunction other than 00, 01,  

  or 04 is requested, or when invalid register within set is requested.

 

»

Handled by error code 07

Error code 02 (Illegal Data Address)

Reported when:

 

»

Function 03 or 04 is requested and the starting register number  

   

is greater than 5198 (register greater than 35198 or 45198)

 

»

Function 03 or 04 is requested and a register within the requested  

    register set is invalid

  

9.3 Modbus function codes (Cont.)

Error code 03 (Illegal Data Value)

Reported when: 

 

»

Function 03 or 04 is requested and the number of data points  

  is greater than 800.

Error code 06 (Busy)

Reported when: 

 

»

The device LCD menu is active.

Error code 07 (Illegal Operation)

Reported when: 

 

»

Function 06 or 16 is requested while the device is write protected.

 

»

Function 08 is requested with an invalid subfunction.

Содержание Level Plus LP Series

Страница 1: ...Level Plus Modbus Interface Manual LP Series Magnetostrictive Liquid Level Transmitters with Temposonics Technology ...

Страница 2: ...gram 7 6 3 Menu Structure 7 7 Alarms 7 8 Error Codes Faults 8 9 Modbus Interface 8 9 1 LP Dashboard 9 9 1 1 Installing LP Dashboard 9 9 1 2 Home Screen 9 9 1 3 Configuration 10 9 1 4 Signal Settings 10 9 1 5 Level Settings 10 9 1 6 Temperature Settings 11 9 1 7 Volume Settings 12 9 1 8 Flash Settings 12 9 1 9 Save Settings 13 9 2 Programming the Display 12 9 3 Modbus Function Codes 14 9 4 Modbus R...

Страница 3: ... 800 633 7609 e mail levelplus mts com Germany General Tel 49 2351 9587 0 Fax 49 2351 56491 e mail info de mtssensors com http www mtssensors com Mailing and shipping address MTS Sensor Technologie GmbH Co KG Auf dem Schüffel 9 D 58513 Lüdenscheid Germany Technical support and applications Tel 49 2351 9587 0 e mail info de mtssensors com http www mtssensors com Japan General Tel 81 42 775 3838 Fax...

Страница 4: ...ial two way communications system that serves as the base level network in a plant or factory automation environment Developed and administered by the fieldbus FOUNDATION G GOVI Gross Observed Volume of the Interface The total volume of the tank occupied by the interface liquid The GOVI is only given when mea suring two liquids and is calculated by subtracting the volume of the product from the to...

Страница 5: ...ty measurement is given the allow able values are 32 F to 150 F 0 C to 66 C S Specific Gravity The density ratio of a liquid to the density of water at the same condi tions Sphere Radius The internal radius of the sphere that contains the liquid the value is used to calculate the volume along with the Sphere Offset Sphere Offset An offset value that accounts for additional volume in a sphere from ...

Страница 6: ...k 7 Verify proper operation of product interface floats and or temperature 8 Turn off power to the transmitter 9 Remove data lines 10 Install the transmitter into the vessel see Operation Manual 11 Reconnect power and data lines 12 Calibrate current tank level using setup software optional 13 Verify communications with the host system 6 Display Menu All LP Series liquid level transmitters are ship...

Страница 7: ...e display UNITs Unit of measurement for the MEASURED VARIABLE shown on the display TEMPERATURE Average temperature for the product in the tank Only shown if the level transmitter was purchased with temperature NOTIFICATIONS Four squares with letters Top left square will always be present indicating a D for DDA mode or a M for Modbus mode Top right square A will only show when there is an alarm Tog...

Страница 8: ...t restored Contact Factory 118 DAC Fault 1 Cycle power to sensor If proper operation is not restored Contact Factory 119 DAC Fault 2 Cycle power to sensor If proper operation is not restored Contact Factory 8 Error Codes Faults 9 Modbus Interface Note Termination and biasing of RS 485 data lines are as follows Biasing Each LP Series transmitter uses a Fail Safe Slew Rate Limited RS 485 RS 422 Tran...

Страница 9: ...me Screen will look as shown If the level transmitter does not include temperature measurement then the Home Screen will not show the middle panel for temperature If the level transmitter does not have volume measurement enabled then the Home Screen will not show the bottom panel The Home Screen can be accessed by pressing the three white bars on the top left The level panel on top shows the level...

Страница 10: ...nging to OFF and cycling power User Configurable Reverse Measure Allows the end user to change the direction in which the MTS level transmitter counts The default setting is OFF and the level transmitter will reference the tip of the pipe hose and count up from the tip The ON setting will reference the head of the level transmitter and count up as it moves towards the tip Device Address The end us...

Страница 11: ... value in the box then the alarm will become active Product Low Alarm Soft alarm that can be disabled or enabled by clicking the X and next to the box If the product level is less than the value in the box then the alarm will become active Interface High Alarm Soft alarm that can be disabled or enabled by clicking the X and next to the box If the interface level exceeds the value in the box then t...

Страница 12: ... Mod correction method Density allows the user to input the measured density for mass calculations Calculation Mode allows the end user to select between using a strapping table and a sphere Default setting is Sphere Working Capacity allows the end user to enter the working capacity of the tank so ullage can be calculated Sphere Radius the radius of the sphere to be used for volume calculations Sp...

Страница 13: ...entering the display is 27513 9 2 1 Data from Device Display Allows the user to select if the display shows Length Units or Volume Units Units Allows the user to change the selected Length Units Volume Units and or Temperature Units Address Allows the user to change the address of the level transmitter Default address is 247 Signal Strength Allows the user to view the strength of the return signal...

Страница 14: ...ers Modbus 4800 BAUD or 9600 8 N 1 Reference Monitor Modbus RTU Variable BAUD Rate 8 E 1 The following Modbus function codes are supported Function 03 Read Holding Registers Function 04 Read Input Registers Function 06 Preset Single Register Function 08 Diagnostics Subfunction 00 Return Query Data Function 08 Diagnostics Subfunction 01 Restart Communications Option Function 08 Diagnostics Subfunct...

Страница 15: ...tion 17 Report Slave ID The device responds to this request with the following data Slave address echoed Function 11H Byte count 05H Slave ID FFH Run indicator status FFH ON Additional data DMS Error check 16 bit CRC 8 bit LRC Modbus Exception Codes The following standard Modbus exceptions are implemented Error code 01 Illegal Function Reported when A function other than 03 04 06 08 16 or 17 is re...

Страница 16: ...e 19 30028 0027 NSVP Low Word 30029 0028 MASS High Word 30030 0029 MASS Low Word Modbus Register Data Address Data Description denotes duplicate register Notes Modbus Register Data Address Data Description denotes duplicate register Notes 30031 0030 Temperature Cor rection Method High Word 11 Page 19 30032 0031 Temperature Cor rection Method Low Word 30033 0032 API Gravity High Word x 100 30034 00...

Страница 17: ...Page 19 30207 206 Temperature 1 Low Word x10000 30208 207 Temperature 2 High Word x10000 30209 208 Temperature 2 Low Word x10000 30210 209 Temperature 3 High Word x10000 30211 210 Temperature 3 Low Word x10000 30212 211 Temperature 4 High Word x10000 30213 212 Temperature 4 Low Word x10000 30214 213 Temperature 5 High Word x10000 30215 214 Temperature 5 Low Word x10000 30216 215 Temperature 6 High...

Страница 18: ... Alarm Status Low Word 30266 265 VCF Calculation Error Status 20 Page 20 30267 266 Volume Calculation Error Status 21 page 20 30268 267 Temperature 13 High Word x10000 30269 268 Temperature 13 Low Word x10000 30270 269 Temperature 14 High Word x10000 30271 270 Temperature 14 Low Word x10000 30272 271 Temperature 15 High Word x10000 30273 272 Temperature 15 Low Word x10000 30274 273 Temperature 16 ...

Страница 19: ...08 310 1107 Reserved 22 Page 20 31109 1108 Alarm Units High 29 Page 20 31110 1109 Alarm Units Low 31111 1110 Interface High Alarm High x 100 30 Page 21 31112 1111 Interface High Alarm Low x 100 31113 1112 Interface Low Alarm High x 100 31 Page 21 31114 1113 Interface Low Alarm Low x 100 31115 1114 Product High Alarm High x 100 32 Page 21 31116 1115 Product High Alarm Low x 100 31117 1116 Product L...

Страница 20: ...mal 147340 Divide by 1000 actual value 147 340 4 Individual digital temperature 5 Average submerged temperature 6 GOVP Gross Observed Volume Product 7 GOVI Gross Observed Volume Interface 8 GOVT Gross Observed Volume Total 9 GOVU Gross Observed Volume Ullage 10 NVSP Net Standard Volume of Product 11 Temperature Correction Method There are five methods to choose from 1 6A Heavy Oils 2 6B Light Oils...

Страница 21: ...ng the volume calculations then the value is zero otherwise the value Is a non zero code and one of the following 1 Negative table entries are not allowed 2 Interpolation error level value not found in the table 3 Sphere Calculation error level exceeds sphere radius x 2 4 Calculated a negative volume value 22 Undefined or reserved registers within the register map will return a maximum negative va...

Страница 22: ... along with the strap table to calculate the corresponding gross observed volumes 2 NSVP GOVP x VCF The net standard volume of the product NSVP is equal to the gross observed volume of the product GOVP multiplied by the volume correction factor VCF The VCF is calculated from thermal expansion properties of the product programmed by the user and the temperature information from the gauge see 4 VOLU...

Страница 23: ...00 0 F 0 to 40 0 API 0 to 250 0 F 40 1 to 50 0 API 0 to 200 0 F 50 1 to 85 0 API Valid temperature range Valid TEC ranges 0 to 300 0 F 270 0 to 510 0 10E 6 F 0 to 250 0 F 510 5 to 530 0 10E 6 F 0 to 200 0 F 530 5 to 930 0 10E 6 F Valid temperature range Valid TEC ranges 0 to 300 0 F 100 0 to 999 0 10E 6 F Table 3 6B light oils Table 4 6C chemicals Table 5 6C MOD For the transition group A T K1 K0 ...

Страница 24: ...jp mtssensors com www mtssensors com MTS Temposonics and Level Plus are registered trademarks of MTS Systems Corporation in the United States MTS SENSORS and the MTS SENSORS logo are trademarks of MTS Systems Corporation within the United States These trademarks may be protected in other countries All other trademarks are the property of their respective owners Copyright 2019 MTS Systems Corporati...

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