Sierra QuadraTherm 640i Instruction Manual
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Sierra QuadraTherm 640i Instruction Manual

Thermal mass flow meters
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QuadraTherm
640i & 780i
®
Foundation Fieldbus
Instruction Manual
Foundation Fieldbus Interface Specification for Models: 640i and 780i
Thermal Mass Flow Meters
Part Number: IM640i/780i-FF, Rev. V1
January 2014

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Summary of Contents for Sierra QuadraTherm 640i

  • Page 1 QuadraTherm 640i & 780i ® Foundation Fieldbus Instruction Manual Foundation Fieldbus Interface Specification for Models: 640i and 780i Thermal Mass Flow Meters Part Number: IM640i/780i-FF, Rev. V1 January 2014...
  • Page 2 IMPORTANT CUSTOMER NOTICE- OXYGEN SERVICE Sierra Instruments, Inc. is not liable for any damage or personal injury, whatsoever, resulting from the use of Sierra Instruments standard mass flow meters for oxygen gas. You are responsible for determining if this mass flow meter is appropriate for your oxygen application. You are responsible for cleaning the mass flow meter to the degree required for your oxygen flow application.
  • Page 3 Warnings and Cautions Warning! Agency approval for hazardous location installations varies between flow meter models. Consult the flow meter nameplate for specific flow meter approvals before any hazardous location installation. Warning! Hot tapping must be performed by a trained professional. U.S. regulations often require a hot tap permit. The manufacturer of the hot tap equipment and/or the contractor performing the hot tap is responsible for providing proof of such a permit.
  • Page 4 Receipt of System Components When receiving a Sierra mass flow meter, carefully check the outside packing carton for damage incurred in shipment. If the carton is damaged, notify the local carrier and submit a report to the factory or distributor. Remove the packing slip and check that all ordered components are present.

  • Page 5: Table Of Contents

    Table of Contents Table of Contents ............................ 5 Chapter 1: Introduction .......................... 6 Chapter 2 – Connecting the 640i/780i Series to Your FF-BUS Network ..........7 Chapter 3 - Definitions ..........................8 Chapter 4 – Foundation Fieldbus Interface Configurations ..............9 AI/AO Blocks: ............................

  • Page 6: Chapter 1: Introduction

    Chapter 1: Introduction This manual will explain how to add a Sierra flow meter equipped with Foundation Fieldbus to your network. The Foundation Fieldbus interface allows access to all relevant data available in the flow meter. This manual is intended to document the configuration of the Sierra Instruments’...

  • Page 7: Chapter 2 - Connecting The 640I/780I Series To Your Ff-Bus Network

    Chapter 2 – Connecting the QuadraTherm 640i/780i to Your FF-BUS Network The QuadraTherm 640i/780i meters use 24VDC (+/-10%) at 1 Amp. Due to the current needed, the meter cannot be powered from the H1 network. The separate 24VDC (+/-10%) power is connected to terminals 1 and 2.

  • Page 8: Chapter 3 - Definitions

    (input), it is still referred to as an AO Block. The 640i/780i FF-BUS interface has one, labeled Modbus: Modbus is another digital communication protocol and is only relevant here because the Sierra FF-BUS interface uses Modbus as an intermediary between the meter and the FF-BUS interface. For special configuration, the user will only need a rudimentary knowledge of Modbus.

  • Page 9: Chapter 4 - Foundation Fieldbus Interface Configurations

    Chapter 4 – Foundation Fieldbus Interface Configurations The 640i/780i FF-BUS interfaces uses a Modbus to FF-BUS translator board inside the flow meter. This allows the user to configure variables accessible to our Modbus interface. For the most part, the Modbus to FF-BUS translation is invisible to the end user unless they want to reconfigure the Transducer Block (TB) to access other Modbus variables.
  • Page 10 Flow unit - index User full scale – low word User full scale – high word Totalizer units Char 1-2 Totalizer units Char 3-4 Totalizer unit - index Temp. units ASCII Char 1-2 Temperature unit - index Pressure units ASCII Char 1-2 Pressure units ASCII Char 3-4 Pressure units ASCII Char 5-6 Pressure units ASCII Char 6-7...

  • Page 11: Chapter 5 - Configuring The Ff-Bus Using Ni-Fbus Configurator

    Chapter 5 – Re-configuring the FF-BUS Using NI- FBUS Configurator The National Instruments F-BUS Configurator software is widely used for testing and configuration of FF-BUS devices. Consult your NI-FBUS Configurator manual for more information on this NI software (included in NI-FBUS help on the software). Before starting the NI-FBUS Configurator, you must import the DD using the NI- FBUS Interface Configurator Utility.

  • Page 12: Configuration

    Configuration Most of the configuration will be done in the Transducer Block (SIERRA_TB) under the “Others” tab (see the screen shots below). In order to write any changes, the Block Mode must be set to OOS (out of service). Make your changes and click “Write Changes.” Once the yellow highlights disappear, click Auto mode.
  • Page 13 Pressure (PV_2), etc. are shown below (See Figure 4). If you scroll down futher, you will also see the static MODBUS_REGS_ values being read from the meter (See Figure 5). Current Flow Rate Current Temperature Current Pressure Accumulated Total Flow Flow Units Temperature Units Pressure Units...
  • Page 14 Alarm Status (ox0=off) Gas Name in ASCII, ox41,72,=Ar Gas Name in ASCII, ox67,6F =go Gas Name in ASCII, ox6E,20 =n The rest of the ASCII characters ox20 = (space) Gas Index 1=Argon Flow Units in ASCII ox53,43,46,5D=SCFM Flow Index 1=SCFM Fig.

  • Page 15: Modbus_Com_Setup

    Figure 6: TB Block Engineering Unit Setup MODBUS_COM_SETUP The Modbus com settings are needed for the communication connection between the Modbus and the FF-BUS boards inside the meter. The Modbus Instrument Address must always be set to 1. The MODBUS _COM_SETUP must always set as shown below: BaudRate: 9600 Baud Stop_Bits: 1 Parity: None...

  • Page 16: Chapter 6 - Available Modbus Registers

    Chapter 6 – Available Modbus Registers Although most users will be satisfied using the default configuration, other Modbus registers can be configured for Foundation Fieldbus access. Below (Table 3) is a list of all available Modbus registers. These would need to be configured in the transducer block. Register Description Read/...
  • Page 17 Adjust DAC for pressure – 20mA 16-bit integer Temperature 4mA value – low word 32 bits real Temperature 4mA value – high word Temperature 20mA value – low word 32 bits real Temperature 20mA value – high word Pressure 4mA value – low word 32 bits real Pressure 4mA value –...
  • Page 18 Alarm active 16 bits ASCII 4 Characters total Alarm mode 16 bits ASCII 6 Characters total Serial number 16 bits ASCII 8 Characters total Firmware version 16 bits ASCII 8 Characters total Calibration date 16 bits ASCII 10 Characters total PCA version 16 bits ASCII 6 Characters total...

  • Page 19: Chapter 7 - Modbus Register Explained

    Chapter 7 – Modbus Register Explained The Modbus registers can be divided into two groups. The first group (00 - 08) represents the dynamic data used in AI1,2,3, and 4. The second group (09 – 130) contains the settings in the flow meter.
  • Page 20 22: Flow Unit Index This 16-bit integer value shows which flow unit is selected on the flow meter. The value can range between 0 and 49:     0 – SCFS 13 – SM3/Day 26 – NLPM 39 –Kg/Year ...
  • Page 21 30: Pressure Unit This 8-character ASCII string shows the currently selected pressure unit on the flow meter. Use Register 34 to select a different unit 34: Pressure Unit Index This 16-bit integer value shows which pressure unit is selected on the flow meter: ...
  • Page 22 41-42: Normal Temperature Value shows the normal temperature. 32-bit real data type. 43: Normal Temperature Unit Index This 16-bit integer shows which temperature unit is selected as the normal temperature:  0 – F  1 – C  2 – K ...
  • Page 23 52: Pressure - 20mA Tuning This 16-bit integer is the DAC value that represents 20 mA for the pressure output 53-54: Temperature - 4mA Value Temperature value that 4 mA equals, in a 32-bit real data type. 55-56: Temperature - 20mA Value Temperature value that 20mA equals, in a 32-bit real data type.
  • Page 24 65-66: Flow – High Alarm Threshold Value at which the high alarm is triggered in a 32-bit real data type 67-68: Temperature – Low Alarm Threshold Value at which the low alarm is triggered in a 32-bit real data type 69-70: Temperature –...
  • Page 25 83-84: Flow Correction This 32-bit real value is used to alter the flow reading (default = 1.000) 85: Enable Totalizer This 16-bit integer is used to enable or disable the totalizer: 0 = off 1 = on 86-87: Totalizer units per pulse This 32-bit real value determines when the totalizer output will pulse.
  • Page 26  93-96: Standard Pressure Unit This 8 character ASCII string shows the pressure unit of the standard pressure:  Psia  Psig  Bar A  Bar G  KPa A  KPa G  Kg/CM2 A  Kg/CM2 G ...
  • Page 27 103-107: Pipe Roughness Description This 10 character ASCII string shows the selected pipe roughness:   Glass  Stainless steel-smooth  Stainless steel -normal  Stainless steel -rough  Carbon steel -smooth  Carbon steel -normal  Carbon steel -rough ...
  • Page 28 123-127: Calibration Date This 10 character ASCII string shows the date the unit was calibrated. 128-130: PCA Version This 6 character ASCII string shows the revision number of the PCA.

  • Page 29: Chapter 8 - Communication Diagnostic Leds

    Chapter 8 – Communication Diagnostic LEDS When powered, one of the Meter to Modbus LEDs will be mostly Green indicating that the meter is communicating with the Modbus board. The other LED will blink Red each time the Foundation Fieldbus Board polls the Modbus board. Every time a message is passed between the Foundation Fieldbus board and the Modbus board the FF_BUS to MODBUS_COM LED will blink yellow.

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Quadratherm 780i

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