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Siemens SITRANS LUT400 Application Manual
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Siemens SITRANS LUT400 Application Manual

Siemens SITRANS LUT400 Application Manual

Communications options, connecting to a control system and the available data
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SITRANS LUT400 Communications Options
Connecting the LUT400 to a control system and the available data
Objective:
While every effort was made to verify the following information, no warranty of accuracy or usability is expressed or implied.
Overview:
The SITRANS LUT400 comes with two ports:
a USB interface
a 4-20 mA output with HART communications
The USB interface connects a computer directly to the LUT400. The user programs the device via a web browser and also
downloads the data logs by treating the LUT400 as an external hard drive.
The HART interface presents a variety of methods for getting data out of the instrument. Listed below are seven ways to connect
the LUT400 to a control system.
1.
4-20 mA card
2.
HART input card (Profibus DP connection)
3.
Profibus PA gateway
4.
Ethernet gateway
5.
Wireless HART gateway
6.
Foundation Fieldbus (FF) gateway
7.
Modbus gateway
Topics
:
Information types
Accuracy
Connection methods
Siemens Milltronics Process Instruments Inc.
1954 Technology Drive, P.O. Box 4225, Peterborough, ON Canada K9J 7B1
Tel: (705) 745-2431 Fax: (705) 741-0466
Email: techpubs@siemens-milltronics.com
Summarize the data types available from the LUT 400
Seven methods to connect the LUT400 to a control system
www.siemens-milltronics.com
APPLICATION GUIDE
AG091712

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Summary of Contents for Siemens SITRANS LUT400

  • Page 1 Seven methods to connect the LUT400 to a control system While every effort was made to verify the following information, no warranty of accuracy or usability is expressed or implied. Overview: The SITRANS LUT400 comes with two ports:  a USB interface ...
  • Page 2 OCM zero offset OCM flow rate decimals Data logs can not be read through HART and are only available through the USB connection. For more detail on the HART commands, see lit18_sitrans_lut400.pdf available on Siemens service and support: http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objID=59217416&subtype=133300 LUT400 Communications Options...

  • Page 3: Status Information

    HART provides several different status information indicators. Most of these gateways give the device variable status, so that an overall health of the variable is read: Working with HART networks Please see Siemens application guide (AG012712) for more details. LUT400 Communications Options...
  • Page 4 APPLICATION GUIDE HART and Accuracy The LUT400 has a stated measurement accuracy of +/- 1 mm plus the additional 0.17% of measured range. You will get this accuracy when using HART, the display, and the data logs. However, the 4-20 mA channel has a transmit, transmission, and receive error in addition to the measurement error, but we do not have data on the transmission and receive errors.
  • Page 5 APPLICATION GUIDE For a 60-meter device, a similar calculation gives a typical error of 18.8 mm and worst-case error of 75 mm. The measurement error is +/- 1 mm plus 0.17 % of the measurement which then equals up to 11mm at 60 meters. Conclusion: using 4-20 mA can result in your value being out between 11 mm and 86 mm.
  • Page 6 APPLICATION GUIDE 1. 4-20 mA card Access to Process Variable: Only via 4-20 mA Equipment Notes: Applies to any manufacturer’s 4-20 mA input cards. Please Access to Secondary Variable: No note that there are different levels of accuracy and conversion speed in 4-20 mA Access to variables from HART commands: No cards.
  • Page 7 2. HART input card in an ET200M Equipment notes: The ET200M is a remote I/O Access to Process Variable: Yes rack on Profibus DP and is made by Siemens. It works with any Profibus DP master. For Access to Secondary Variable: Yes...
  • Page 8 APPLICATION GUIDE 3. Profibus PA Gateway Equipment notes: the key piece of equipment Access to Process Variable: Yes for this application is the T500, a Profibus PA to HART gateway made by Fieldbus Access to Secondary Variable: Yes International AS (Fint). Order directly from Fint at www.fint.no.
  • Page 9 APPLICATION GUIDE LUT400 Communications Options AG091712 9 of 13...

  • Page 10: Ethernet Gateway

    APPLICATION GUIDE 4. Ethernet Gateway Equipment notes: The Ethernet gateway is Access to Process Variable: Yes made by Ifak. The head module is called isNetLite and the HART modules are isNet Access to Secondary Variable: Yes H@rt4 and isNet H@rt8. They can be purchased directly from Ifak at www.ifak- Access to variables from HART commands: Yes...
  • Page 11 5. WirelessHART Gateway Equipment notes: The Ethernet to Wireless Access to Process Variable: Yes gateway and SITRANS AW210 are made by Siemens. Access to Secondary Variable: Yes Access to variables from HART commands: Yes Access to status information: Yes Full accuracy: Yes...
  • Page 12 APPLICATION GUIDE Disadvantages:  Capital costs are high LUT400 Communications Options AG091712 12 of 13...
  • Page 13 APPLICATION GUIDE 6. Foundation Fieldbus Gateway Access to Process Variable: Yes Equipment notes: The key piece of equipment for this application isT700, the FF to HART Access to Secondary Variable: Yes gateway made by Fieldbus International AS (Fint). This can be ordered directly from Fint Access to variables from HART commands: No at www.fint.no.

  • Page 14: Modbus Gateway

    APPLICATION GUIDE 7. Modbus Gateway Equipment notes: The key piece of equipment Access to Process Variable: Yes for this application is the Modbus to HART gateway made by Moore Industries, called a Access to Secondary Variable: Yes HCS HART concentrator. This can be ordered directly from Moore Industries at Access to variables from HART commands: No www.miinet.com.
  • Page 15 APPLICATION GUIDE  No remote access via configuration software LUT400 Communications Options AG091712 15 of 13...
  • Page 16 APPLICATION GUIDE Summary Chart Wireless Ethernet Modbus 4-20 mA card HART card PA gateway HART FF Gateway Gateway Gateway Gateway Access to PV Access to secondary Yes* Yes* Yes* Yes* Yes* Yes* variable Access to variables from Yes* Yes* Yes* HART commands Access to status...