Sierra InnovaMass 240i Series, InnovaMass 241i Instruction Manual

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InnovaMass® 240i/241i Series BACnet

Instruction Manual

BACnet Device Specification for Models: 240i and 241i Volumetric & Multivariable Mass Vortex Flow Meter

Part Number: IM240i/241i BACnet Version V2 April 2018

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For Global Service Centers, go to http://www.sierrainstruments.com/facilities.html
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.

© COPYRIGHT SIERRA INSTRUMENTS 2018

No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language, in any form or by any means, electronic, mechanical, manual, or otherwise, or disclosed to third parties without the express written permission of Sierra Instruments. The information contained in this manual is subject to change without notice.

TRADEMARKS

InnovaFlo® and InnovaMass® are trademarks of Sierra Instruments, Inc. Other product and company names listed in this manual are trademarks or trade names of their respective manufacturers.

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Warnings and Cautions

"Warning," "Attention," and "Note" statements are used throughout this manual to draw your attention to important information.

Symbol Key
Symbol Symbol
Meaning
Descripition
Warning "Warning" statements appear with information that is important to
protect people and equipment from damage. Pay very close
attention to all warnings that apply to your application. Failure to
comply with these instructions may damage the meter and
cause personal injury.
! Caution "Attention" indicates that failure to comply with stated instructions
may result in damage or faulty operation of the meter.
(!) Note "Note" indicates that ignoring the relevant requirements or precautions may result in flow meter damage or malfunction.

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.

Warning! All wiring procedures must be performed with the power off.

Warning! To avoid potential electric shock, follow National Electric Code safety practices or your local code when wiring this unit to a power source and to peripheral devices. Failure to do so could result in injury or death. All AC power connections must be in accordance with published CE directives.

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Warning! Do not power the flow meter with the sensor remote (if applicable) wires disconnected. This could cause over-heating of the sensors and/or damage to the electronics.

Warning! Before attempting any flow meter repair, verify that the line is de-pressurized.

Warning! Always remove main power before disassembling any part of the mass flow meter.

Caution! Before making adjustments to the device, verify the flow meter is not actively monitoring or reporting to any master control system. Adjustments to the electronics will cause direct changes to flow control settings.

Caution! All flow meter connections, isolation valves and fittings for hot tapping must have the same or higher-pressure rating as the main pipeline.

Caution! Changing the length of cables or interchanging sensors or sensor wiring will affect the accuracy of the flow meter. You cannot add or subtract wire length without returning the meter to the factory for recalibration.

Caution! When using toxic or corrosive gases, purge the line with inert gas for a minimum of four hours at full gas flow before installing the meter.

Caution! The AC wire insulation temperature rating must meet or exceed 80°C (176°F).

Caution! Printed circuit boards are sensitive to electrostatic discharge. To avoid damaging the board, follow these precautions to minimize the risk of damage:

  • before handling the assembly, discharge your body by touching a grounded, metal object
  • handle all cards by their edges unless otherwise required
  • when possible, use grounded electrostatic discharge wrist straps when handling sensitive component
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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. Make sure any spare parts or accessories are not discarded with the packing material. Do not return any equipment to the factory without first contacting Sierra Customer Service.

Technical Assistance

If you encounter a problem with your flow meter, review the configuration information for each step of the installation, operation, and setup procedures. Verify that your settings and adjustments are consistent with factory recommendations. Installation and troubleshooting information can be found in the InnovaMass 240i/241i Series Product Instruction Manual.

If the problem persists after following the troubleshooting procedures outlined in the 640S or 780S product manuals, contact Sierra Instruments by fax or by E-mail(see inside front cover). For urgent phone support you may call (800) 866-0200 or (831) 373-0200 between 8:00 a.m. and 5:00 p.m. PST. In Europe, contact Sierra Instruments Europe at +31 20 6145810. In the Asia-Pacific region, contact Sierra Instruments Asia at +86-21-58798521. When contacting Technical Support, make sure to include this information:

  • The flow range, serial number, and Sierra order number (all marked on the meter nameplate)
  • The software version (visible at start up)
  • The problem you are encountering and any corrective action taken
  • Application information (gas, pressure, temperature and piping configuration)

Register Your Product Today

Warranty Statement

All Sierra products are warranted to be free from defects in material and workmanship and will be repaired or replaced at no charge to Buyer, provided return or rejection of product is made within a reasonable period but no longer than one (1) year for calibration and non-calibration defects, from date of delivery. To assure warranty service, customers must register their products online on Sierra's website. Online registration of all of your Sierra products is required for our warranty process. Read complete warranty policy at www.sierrainstruments.com/warranty.

Register Warranty Online

Register now at www.sierrainstruments.com/register. Learn more about Sierra's warranty policy at www.sierrainstruments.com/warranty

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Table of Contents

Chapter 1: Introduction 7
BACnet MS/TP Description 7
Chapter 2: BACnet Installation 8
Overview 2-Wire Topology RS-485 Network 8
Electrical Connections 9
AC Power Wiring 9
DC Power Wiring. 10
Connecting the RS-485 Network Wires .11
Cable 11
Terminator 12
Line Polarization 12
Shield Wire Grounding 12
Cabling & Wiring Do's and Don'ts 12
Chapter 3: InnovaMass 240i/241i Com Settings .14
Baud Rate and MAC Address Configuration .14
Chapter 4: Supported BACnet Services/Objects .16
Acronyms and Definitions .17
BACnet Supported Device, Object & Property Table .18
Chapter 5: Engineering Units .25
Units Not Supported by BACnet 25
Chapter 6: Troubleshooting Tips .27
Other Troubleshooting Tips 28
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Chapter 1: Introduction

This manual will explain the function and operation of the optional BACnet interface for Sierra Instruments InnovaMass® 240i/241i iSeries vortex mass flow meter.

This document is intended to be a complement to other 240i/241i® documentation by providing a complete description of the InnovaMass iSeries from a BACnet communication perspective. It is also intended to be a technical reference for BACnet capable host application developers, system integrators and knowledgeable end users. This manual assumes the reader already has a working knowledge of BACnet protocol requirements and terminology. For specific operations of the InnovaMass 240i and 241i vortex flow meter, consult the InnovaMass 240i/241i iSeries Instruction manual.

BACnet MS/TP Description

BACnet is a communications protocol for Building Automation and Control (BAC) networks that is governed by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), SSPC 135, ANSI, and ISO 16484-5 standard protocol.

The BACnet Master---slave/token-passing (MS/TP) driver implements a data link protocol that uses the services of the RS-485 physical layer. The MS/TP bus is based on BACnet standard protocol SSPC-135, Clause 9. BACnet MS/TP protocol is a peer-to-peer, multiple master protocols based on token passing. Only master devices can receive the token, and only the device holding the token is allowed to originate a message on the bus. The token is passed from master to master using a small message in consecutive order starting with the lowest address. Slave devices on the bus only communicate on the bus when responding to a data request from a master device.

Caution!

To fully understand the InnovaMass and its functions please read the InnovaMass instruction manual.

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Chapter 2: BACnet Installation

Overview 2-Wire Topology RS-485 Network

BACnet MS/TP uses a common 2-wire RS-485 (EIA-485) physical layer, so all of the same RS-485 wiring practices apply. Devices should be wired using a daisy chain topology and the last device should have a 120Ω termination resistor to prevent reflections. RS-485 repeaters may be used to exceed 32 devices or to clean up the signal. In some cases, a pull up and pulldown resistor may be used to "stiffen" the bus bias. If stub wires are necessary, they cannot be more than 10 cm long. (See Figure 1).

BACnet MS/TP uses a proprietary RS-485 with master slave token passings so all devices can be a master or a slave. If you need an inexpensive USB to BACnet MS/TP converter for your PC for testing, we recommend Control Solutions, Inc.'s model MTX00 2

Figure 1. RS-485 Network Example

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Electrical Connections-Input

All electrical connections are made on the terminal board inside the InnovaMass enclosure. For detailed instructions on installing your InnovaMass iSeries meter, please read the InnovaMass 240i/241i Instruction Manual. For complete wiring instructions please see Chapter 2 of the 240i/241i instruction manual.

Input Power Wiring

AC Power Wiring

The AC power wire size must be 26 to 16 AWG with the wire stripped 1/4 inch (6 mm). Connect 100 to 240 VAC (0.2 Amps RMS at 230 VAC) to the neutral and line terminals on the terminal block. Connect the ground wire to the safety ground lug. Torque all connections to 4.43 to 5.31 in-lbs (0.5 to 0.6 Nm) (See Figure 2).

The Hazardous-Area enclosure has two separate conduit entries to maintain separation between AC input power and output signal wiring. To eliminate the possibility of noise interference, use a separate cable entry for the AC power and signal lines.

Figure 2. AC Input Power Wiring Connections

All wiring procedures must be performed with the power Off

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The AC wire insulation temperature rating must meet or exceed 80 °C (176°F).

DC Power Wiring

The DC power wire size must be 26 to 16 AWG with the wire stripped 1/4 inch (6 mm). Connect 24 VDC +/-10% (0.4 amp load, maximum) to the terminals marked on the terminal block. Connect the earth ground wire to the safety ground log. Torque all connections to 4.43 to 5.31 in-lbs (0.5 to 0.6 Nm). See Figure 3.

If conduit seals are used, they must be installed within 18 inches of the enclosure.

Figure 3. DC Input Power Wiring Connections

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Connecting the RS-485 Network Wires

Caution!

The InnovaMass is equipped with an optical isolated RS-485 interface. Grounding the RS-485 common (15) would defeat this.

  • 1. Connect your 2-wire RS-485 network to terminal 13 (A-) and your wire RS-485 to terminal 14 (B+).
  • 2. Connect the RS-485 common (sheild wire) to terminal Com 15 (See Figure 4).

Figure 4. BACnet RS-485 Network Wire Connection

Cable

It is recommended that you use a shielded twisted pair type of cable (reduces radiated and received EMI). Use a 24 AWG shielded twisted pair cable, with low capacitance like Belden 9841.

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Terminator

Reflections in a transmission line can cause communication errors. To minimize the reflection, it is required to place 120Ω terminator resistors at both ends of the cable. Never place a terminator resistor somewhere along the cable. Some gateways, PLCs, and other types of devices have terminator resistors built-in. If so, do not add another one. Using an Oscilloscope, you can see what a reflection looks like, and how it can confuse the data (See Figure 5):

Figure 5 Reflections in Transmission Line

Line Polarization

RS-485 uses three voltage levels, "1", "0", and idle. In noisy environments, it may be necessary to polarize the lines to ensure that the receivers stay in a constant state when the idle "no signal" is present. In most cases, the master does this already.

Commercially available isolated RS-485 repeaters in the middle of your wire run will "clean up" the signals and polarize the idle voltage. This is very useful for long wire runs and noisy environments.

Shield Wire Grounding

We use a RS-485 chip that has 1,5000 volts of isolation (See Figure 4). For electrical noise, it's best to keep the shield wire isolated from Earth ground and only connect it to terminal 16 and the signal ground at the Master.

Occasionally, you may have no choice but to share the network with a device that has a non-isolated RS-485 chip. Usually, you can get by with this. If you still have trouble, you may need to use an isolated RS-485 repeater to separate it from the rest of the network.

Summary: Cabling & Wiring Do's and Don'ts

  • 1. Use a 24 AWG shielded twisted pair cable, with low capacitance, 120Ω impedance like Belden 9841.
  • 2. Never put the RS-485 wires in the same conduit as AC power. Ideally, DC power wires should be run in separate conduit if possible to prevent interference issues.
  • 3. Both ends of the RS-485 network cable should have 120 Ω resistors to prevent reflections. Before the network is running you should be able to verify this with a simple DMM. You should measure about 60Ω total. (Two 120Ω resistors in parallel)
  • 4. Terminals A- and B+ connections will be connected to the twisted wire pair in the center of the cable.
  • 5. The cable shield wire needs be connected terminal C. It's better if the shield it is not connected to Earth ground. However, some other RS-485 devices on your network may already Earth grounded this shield. This is still acceptable, but it's best that this device is near the master.
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  • 6. Wires between RS-485 devices need to be wired in a daisy-chain pattern. They should never be wired with separate home-runs back to the master in a Star pattern. When daisy chaining the Modbus A/B wires you should either twist the wires together and solder or use a crimp ferrule, this would still allow the bus to be connected even if the meter A/B wires were disconnected at one 240i.
  • 7. Keep the wires as short as possible inside the enclosure and maintain the wire twist as much as possible.
  • 8. The meter enclosure should always be Earth grounded. This prevents Electrostatic and Electromagnetic noise from interfering with the meter's microprocessor or the BACnet data. In addition, it also provides for safety, EMI, RFI, and ESD protection. Both the main and remote (if E4 option ordered) enclosures should be connected to Earth ground, see below for more details.
    • A. External Earth Grounding: The external Earth connections are located on the boss on the outside of both the main housing and remote housing (E4 option if ordered) and consist of an 18-8SS pan head Phillips screw (10-24 UNC-2B thread) and a serrated tooth #10 ring terminal for 16-14 AWG wire.
    • B. Internal Earth Grounding: The internal Earth connection is located in the main housing terminal side and consist of an 18-8SS pan head Phillips screw (10-24 UNC-2B thread) and a serrated tooth #10 ring terminal for 16-14 AWG wire.
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Chapter 3: InnovaMass 240i/241i Com Settings

The BACnet MS/TP bus can be configured using the InnovaMass 240i/241i SIP. It can communicate at one of three baud rates: 9600, 19200 and 38400. It is very important that all of the devices on the MS/TP bus be set to communicate at the same baud rate.

Baud Rate and MAC Address Configuration

The Baud rate and MAC (MS/TP) address are changed using the Smart Interface Portal (SIP) software. Download software at http://www.sierrainstruments.com/products/sip/sip-innovamass.html. Once the SIP software is installed, select "Hardware Configuration" from the dropdown list (See Figure 6). In the "Hardware Configuration" screen, select available MS/TP Baud rates are 9600, 19200 and 38400. The "MS/TP MAC Address" of 1 to 127 may be selected (See Figure 6).

Figure 6. InnovaMass 240i/241i SIP Main Menu Dropdown

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SS 24 01/24 11 (
IETER DISPLAY Docume
MEI
Hardware Co
nts and Downloa
TER CONTROL
Infiguration
25
Relay "A"
Off
Force On
Totalizer Pulse
Row Alarm
Temperature Alarm
Pressure Alarm
Totalizer Alarm
Reloar
Relay "B"
Off
Force On
Totalizer Pulse
Row Alam
Temperature Alam
Pressure Alam
Totalizer Alam
USB UART
Display UART
Display UART
MSTP Baud
MSTP Address
Terminal UART
UART Emulation
Default
Default
38400
2
Default
MS Delay Frame Delay 1 50 10 10 1 Locked
ure 7. InnovaMass Si P Hardware Configur ation Menu **** Select Port:
MS/TP
сома ~
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Chapter 4: Supported BACnet Services/Objects

A BACnet object represents physical or virtual equipment information, as a digital input or parameters. The InnovaMass 240i/241i Series vortex mass flow meter uses the following object types:

  • a. Device Object (1)
  • b. Analog Input (21)
  • c. Binary Input (10)
  • d. Binary Output (1)

Each object type defines a data structure composed by properties that allow the access to the object information. The table on the following pages shows the implemented properties for each InnovaMass 240i/241i Vortex Mass Flow Meter object type.

Supported BACnet Services/Objects
BACnet Interoperability Building Blocks Services Support
DS-RP-B Read Property Execute
DS-WP-B Write Property Execute
DM-DDB-B Read Property Multiple Execute
DM-DOB-B Write Property Multiple Execute
DM-DCC-B Who-Is Execute
DS-RPM-B IAm Initiate
DS-WPM-B Who-Has Execute
I-Have Initiate
Device Communication Control Execute

Supported BACnet Services/Objects

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Acronyms and Definitions

Acronyms and Definitions
Item Description
APDU Application Protocol Data Unit
BACnet Building Automation and Control Network Data communication protocol
MS/TP MasterSlave Token passing (a twisted pair RS485 network created by BACnet)
BIBB BACnet Interoperability Building Block (Specific individual function blocks for data exchange
BV Binary Value
BI Binary Input
AI Analog Input
RP Read Property
WP Write Property
RPM Read Property Multiple
WPM Write Property Multiple.
DDB Dynamic Device Binding
DOB Dynamic Object Binding
DCC Device communication Control
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BACnet Supported Device, Object & Property Table

BACnet Object Name Obj, Instance BACnet Object Property Default/Sample Values
Object Identifier MAC
Object Name 240i Flowmeter
Object Type Flowmeter
System Status Operational
Vendor Name Sierra Instruments
Vendor Identifier ASHRA# 722
Model Name 240i
Firmware Revision v1.2.07
Application Software Version v1.2.07
Location NULL
Description NULL
Device1 Day 1 Protocol Version 1
Device1 Dev, 1 Protocol Revision 12
Protocol Services Supported
Protocol Object Types Supported
Object List
Max APDU Length Accepted 480
Segmentation Supported No
APDU Timeout 6000
Number Of APDU Retries 3
Max Master 127
Max Info Frames 1
Device Address Binding
Database Revision 0
Object Identifier AI-1
Object Name Flow
Object Type Analog Input
Present Value 1
Flow AI, 1 Description Used for measurement of Flow
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units cubic_feet_per_minute
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BACnet Object Name Obj, Instance BACnet Object Property Default/Sample Values
Object Identifier AI-2
Object Name Temperature1
Object Type Analog Input
Present Value 70
Temperature1 AI, 2 Description Int. Temperature
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units degrees_fahrenheit
Object Identifier AI-3
Object Name Temperature2
Object Type Analog Input
Present Value 123.4
Temperature2 AI, 3 Description Ext. Temperature
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units degrees_fahrenheit
Object Identifier AI-4
Object Name Pressure
Object Type Analog Input
Present Value 14.7
Pressure AI, 4 Description Fluid Pressure
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units pounds_per_square_inch
Object Identifier AI-5
Object Name Energy Flow
Object Type Analog Input
Present Value 1
Energy Flow AI,5 Description Energy Flow in Fluid
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units btus
Object Identifier AI-6
Object Name Totalizer
Object Type Analog Input
Present Value 1235
Totalizer AI,6 Description Flow Totalizer
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units cubic_feet
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BACnet Object Name Obj, Instance BACnet Object Property Default/Sample Values
Object Identifier AI-7
Object Name Alarm Status
Object Type Analog Input
Present Value 0
Alarm Status AI,7 Description State of Alarm Relay
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
Object Identifier AI-8
Object Name Alarm Active
Object Type Analog Input
Present Value 0
Alarm active AI,8 Description Source of Alarm
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
Object Identifier AI-9
Object Name Alarm Mode
Object Type Analog Input
Present Value 0
Alarm mode AI,9 Description Selected Alarm Mode
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
Object Identifier AI-10
Object Name Velocity
Object Type Analog Input
Present Value 1
Velocity AI,10 Description Point vol. Velocity
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units feet_per_second
Object Identifier AI-11
Object Name Flow-Pro
Object Type Analog Input
Present Value 1
Flow-Pro AI,11 Description Correction Factor
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
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Object Identifier Al-12 Object Name Density Object Type Analog Input Present Value 1 Description Density for mass Status Flags F,F,F,F {} Event State NORMAL Out of Service 0 Units No units Object Identifier Al-13 Object Type Analog Input Present Value 1 0 bject Identifier Al-13 Object Type Analog Input Present Value 1 Description Reynolds Al,13 Description Description Reynolds number Status Flags F,F,F,F {} Event State NORMAL OUt Of Service 0 Units No units Object Vare Analog Input Present Value 1 Description Dynamic Viscosity Object Vare Analog Input Present Value BACnet Object Name Obj, Instance BACnet Object Property Default/Sample Values
Object Name Density Al,12 Description Density for mass Status Flags F,F,F,F () Event State NORMAL Outiest No units Object Identifier Al-13 Object Identifier Al-13 Object Varee 0 Units No units Object Varee Analog Input Present Value 1 Object Varee Analog Input Present Value 1 Object Varee Analog Input Present Value 1 Description Reynolds number Status Flags F,F,F,F () Event State NORMAL Out of Service 0 Units No units Object Identifier Al-14 Object Varee Analog Input Present Value 1 Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F () Event State NORMAL Object Identifier AI-12
Density Al,12 Description Density for mass Density Al,12 Description Density for mass Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Object Identifier Al-13 Object Type Analog input Present Value 1 Description Reynolds Al,13 Description Reynolds Diget Identifier Description Reynolds number Status Flags F,F,F,F { } Event State NORMAL Out of Service O Out of Service 0 O Out of Service Out of Service 0 O Out of Service Object Identifier Al-14 Object Type Analog input Viscosity Al,14 Description Dymaic Viscosity Object Identifier Al-14 Object Type Analog input Viscosity Al,14 Description Dymaic Viscosity Object Type Analog input Present Value Object Name Density
Pensity Ai,12 PresentValue 1 Density Ai,12 Description Density for mass Status Flags F,F,F,F (1) Event State NORMAL Out Of Service 0 Units No units Object Varue 0 Object Varue 1 Present Value 1 Description Reynolds number Status Flags F,F,F,F (1) Event State NORMAL Out Of Service 0 Units No units Object Varue 1 Viscosity Al,14 Description No units Object Varue 1 Viscosity Al,14 Description Dynamic Viscosity Viscosity Al,14 Description Dynamic Viscosity Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F (1) Event State NORMAL Out Of Service 0 Units 423 Object Type Anal Object Type Analog Input
Density Al,12 Description Density for mass Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Object Identifier Al-13 Description Reynolds number Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Out Of Service 0 Units No units Viscosity Al,14 Description Dynamic Viscosity Object Identifier Al-14 Object Rame Viscosity Object Rame Viscosity Viscosity Al,14 Description Dynamic Viscosity Out Of Service 0 Out Of Service 0 Out Of Service 0 Object Name F,F,F,F { } Event State NORMAL Object Wame Frequency Object Name Frequency Object Identifier Al-15 Present Value 1
Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units No units Object Identifier Ai-13 Object Name Reynolds Object Type Analog Input Present Value 1 Description Reynolds number Status Flags F,F,F,F {} Event State NORMAL Out of Service 0 Units No units Object Identifier Ai-14 Object Type Analog Input Present Value 1 Viscosity Ai,14 Description Dynamic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units 423 Object Identifier Ai-15 Object Name Frequency Object Name Frequency Object Identifier Ai-15 Object Name Frequency Density AI,12 Description Density for mass
Event State NORMAL Out Of Service 0 Units No units Object Identifier Al-13 Object Type Analog Input Present Value 1 Description Reynolds number Status Flags F, F (1) Event State NORMAL Out Of Service 0 Units No units Viscosity Al,14 Object Identifier Al-14 Object Identifier Al-15 Out of Service 0 Units 423 Out of Service 0 Units 423 Object Identifier Al-15 Object Identifier Al-15 Object Identifier Status Flags F,F,F,F { }
Out Of Service 0 Units No units Object Identifier AI-13 Object Name Reynolds number Fresent Value 1 Present Value 1 Description Reynolds number Status Flags F,F,F,f {} Event State NORMAL Out Of Service 0 Units No units Object Identifier AI-14 Object Type Analog Input Present Value 1 Description Dynamic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units 423 Object Identifier AI-15 Object Name Frequency AI,15 Description Vortex shedder frequency Event State NORMAL
Units No units Object Identifier AI-13 Object Type Analog Input Present Value 1 Description Reynolds number Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Object Identifier AI-14 Object Type Analog Input Present Value 1 Object Identifier AI-14 Object Type Analog Input Present Value 1 Description Dynamic Viscosity Viscosity AI,14 Description Description Dynamic Viscosity Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units 423 Object Type Analog Input Present Value 1 Description Vortex shedder frequency Out Of Service 0
Beynolds Al,13 Object Identifier Al-13 Reynolds Al,13 Description Reynolds Analog input Present Value 1 Description Reynolds number 3 Status Flags F,F,F,F { } 1 Event State NORMAL 0 Out Of Service 0 0 Units No units No Viscosity Al,14 Description Description Viscosity Al,14 Description Dynamic Viscosity Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Object Identifier Al-15 0 0 Object Name Frequency Object Name Frequency Al,15 Description Vortex shedder frequency Object Name Frequency Disct Identifier Al-15 Object Name Frequency Units No units
Reynolds Al,13 Object Name Reynolds (piput) Reynolds Al,13 Description Reynolds number Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units No units No units 0 Viscosity Al,14 Object Identifier Al-14 Object Name Viscosity Object Identifier Al-14 Object Type Analog Input Present Value 1 Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units 423 0 Viscosity Al,15 Object Identifier Al-15 0 Object Identifier Al-15 0 Viscosity Al,15 Description Vortex shedder frequency Object Identifier Al-15 0 0 < Object Identifier AI-13
Reynolds Al,13 Object Type Analog Input Present Value 1 Object Name Reynolds
Reynolds Al,13 Present Value 1 Description Reynolds number Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Object Identifier Al-14 Object Rame Viscosity Object Identifier Al-14 Object Rame Viscosity Object Rame Viscosity Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units 423 Object Identifier Al-15 Object Type Analog Input Present Value 1 Description Vortex shedder frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Object Type Analog Input< Object Type Analog Input
Reynolds Al,13 Description Reynolds number Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units 0bject Identifier Al-14 Object Type Analog Input Present Value 1 Viscosity Al,14 Description Dynamic Viscosity Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 0 Units 423 Object Ivpe Analog Input Present Value 1 Description Frequency Al,15 Description Vortex shedder frequency Object Identifier Al-15 Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units hertz 0 Votex shedder frequency 0 Present Value 1
Status Flags F,F,F,F { } Event State NORMAL Out of Service 0 Units No units Object Identifier Al-14 Object Name Viscosity Object Type Analog Iput Present Value 1 Event State NORMAL Out of Service 0 Out of Service 0 Units 423 Object Identifier Al-15 Out of Service 0 Out of Service 0 Units 423 Object Identifier Al-15 Object Name Frequency Object Type Analog Input Present Value 1 Durits Halt Event State NORMAL Out of Service 0 Units Halt Object Identifier Al-16 Out of Service 0 Units Halt Object Name Fr,F,F,F {} Event State NORMAL Reynolds AI,13 Description Reynolds number
Event State NORMAL Out Of Service 0 Units No units Object Identifier Al-14 Object Type Analog Input Present Value 1 Description Dynamic Viscosity Out of Service 0 Out of Service 0 Out of Service 0 Units 423 Object Identifier Al-15 Object Type Analog Input Present Value 1 Present Value 1 Description Vortex shedder frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Object Type Analog Input Present Value 1 Out of Service 0 Units hertz Object Identifier Status Flags F,F,F,F { }
Out Of Service 0 Units No units Object Identifier AI-14 Object Name Viscosity Object Type Analog Input Present Value 1 Description Dynamic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out of Service 0 Units 423 Object Identifier AI-15 Object Identifier AI-15 Object Type Analog Input Present Value 1 Present Value 1 Object Identifier AI-15 Object Type Analog Input Present Value 1 Description Vortex shedder frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out of Service 0 Units hertz Object Name Event State NORMAL
UnitsNo unitsViscosityAl-14Object IdentifierAl-14Object NameViscosityObject TypeAnalog InputPresent Value1DescriptionDynamic ViscosityStatus FlagsF,F,F,F {}Event StateNORMALOut of Service0Units423Object TypeAnalog InputPresent Value1Object NameFrequencyObject TypeAnalog InputPresent Value1Object TypeAnalog InputPresent Value1DescriptionVortex shedder frequencyObject TypeAnalog InputPresent Value1DescriptionVortex shedder frequencyStatus FlagsF,F,F {}Event StateNORMALOut of Service0UnitshertzObject IdentifierAl-16Object NameCk factorObject TypeAnalog InputPresent Value20Ck factorAl,16DescriptionFor dynamic freq.Status FlagsF,F,F,F {}Event StateNORMALOut Of Service0UnitsFor dynamic freq.Status FlagsF,F,F,F {}Event StateNORMALOut Of Service0UnitsNo units Out Of Service 0
Viscosity Al,14 Object Identifier Al-14 Object Name Viscosity Object Type Analog Input Present Value 1 Description Dynaic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units 423 Object Identifier Al-15 Object Name Frequency Al,15 Description Vortex shedder frequency Object Identifier Al,15 Description Vortex shedder frequency Status Flags Frequency Al,15 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units hertz Object Identifier Al-16 Object Type Analog Input Present Value 20 Ck factor Object Name Ck factor Object Type Analog Input Present Value Description Units No units
Viscosity Al,14 Object Name Viscosity Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out of Service 0 0 Units 423 Object Type Analog Input Present Value 1 Frequency Al,15 Object Identifier Al-15 Object Type Analog Input Present Value 1 Present Value 1 1 Description Vortex shedder frequency Object Type Analog Input Present Value Present Value 1 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 0 Units hertz Object Identifier Al-16 Object Name Ck factor Object Name Ck factor Object Type Analog Input Present Value 20 Description Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Out Of Service 0 Object Identifier AI-14
Viscosity Al,14 Object Type Analog Input Present Value 1 Description Dynamic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units 423 Object Identifier Al-15 Object Name Frequency Object Type Analog Input Present Value 1 Present Value 1 Object Identifier Al-15 Object Type Analog Input Present Value 1 Out Of Service 0 Out Of Service 0 Object Identifier Al-16 Object Name Ck factor Object Name Ck factor Object Name Ck factor Object Name Ck factor Object Name Ck factor Object Type Analog Input< Object Name Viscosity
Viscosity Al,14 Present Value 1 Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units 423 Object Identifier Al-15 Object Name Frequency Object Type Analog Input Present Value 1 Present Value 1 Description Vortex shedder frequency Object Identifier Al-15 Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units hertz Object Identifier Al-16 Object Name Ck factor Object Type Analog Input Present Value 20 Ck factor Al,16 Description For dynamic freq. Status Flags F,F,F,F {} Event State< Object Type Analog Input
Viscosity Al,14 Description Dynamic Viscosity Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units 423 Object Identifier Al-15 Object Vame Frequency Object Vame Al-15 Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units hertz Object Identifier Al-16 Object Name Ck factor Object Identifier Al-16 Object Type Analog Input Present Value 20 Units hertz Object Type Analog Input Present Value 20 Ck factor Al,16 Description For dynamic freq. Status Flags F,F,F,F { } Event State NORMAL Out of Service 0 Units Present Value 1
Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units 423 Object Identifier Al-15 Object Name Frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units hertz Object Identifier Al-16 Object Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units hertz Object Identifier Al-16 Object Type Analog Input Present Value 20 Ck factor Al,16 Description For dynamic freq. Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Uut of Service 0 Uut of Service 0 Uut of Service 0 Viscosity AI,14 Description Dynamic Viscosity
Event State NORMAL Out Of Service 0 Units 423 Object Identifier Al-15 Object Name Frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units hertz Object Identifier Al-16 Object Type Analog Input Status Flags F,F,F,F { }
Out Of Service 0 Units 423 Object Identifier AI-15 Object Name Frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units hertz Object Type Analog Input Event State NORMAL
Units 423 Object Identifier AI-15 Object Name Frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out of Service 0 Units hertz Object Type Analog Input Present Value 1 Out Of Service 0
Frequency Al,15 Object Identifier Al-15 Object Name Frequency Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out of Service 0 Units hertz Object Type Analog Input Present Value 20 Description For dynamic freq. Status Flags F,F,F,F {} Event State NORMAL Object Identifier Al-16 Object Type Analog Input Present Value 20 Description For dynamic freq. Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units No units Units 423
Frequency Al,15 Object Name Frequency Al,15 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units hertz Object Type Analog Input Present Value 1 Ck factor Al,16 Object Identifier Al-16 Object Type Analog Input Present Value 20 Ck factor Al,16 Description For dynamic freq. Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units Normanic freq. Object Identifier AI-15
Frequency AI,15 Object Type Analog Input Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units hertz Object Type Analog Input Present Value 1 Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units hertz Object Identifier AI-16 Object Type Analog Input Present Value 20 Description For dynamic freq. Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units No units Object Name Frequency
Frequency AI,15 Present Value 1 Present Value 1 Description Vortex shedder frequency Status Flags F,F,F,F{} Event State NORMAL Out Of Service 0 Units hertz Object Identifier AI-16 Object Name Ck factor Object Type Analog Input Present Value 20 Status Flags F,F,F,F {} Event State NORMAL Object Type Analog Input Present Value 20 Status Flags F,F,F,F {} Event State NORMAL Out Of Service 0 Units No units Object Type Analog Input
Frequency AI,15 Description Vortex shedder frequency Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units hertz Object Identifier AI-16 Object Type Analog Input Present Value 20 Ck factor AI,16 Description For dynamic freq. Status Flags F,F,F,F { } Event State NORMAL Object Type Analog Input Present Value 20 Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Present Value 1
Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units hertz Object Identifier AI-16 Object Vame Ck factor Object Type Analog Input Present Value 20 Present Value 20 Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Frequency AI,15 Description Vortex shedder frequency
Event State NORMAL Out Of Service 0 Units hertz Object Identifier AI-16 Object Name Ck factor Object Type Analog Input Present Value 20 Present Value 20 Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Status Flags F,F,F,F { }
Out Of Service 0 Units hertz Object Identifier AI-16 Object Name Ck factor Object Type Analog Input Present Value 20 Ck factor Description Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Event State NORMAL
Units hertz Object Identifier AI-16 Object Name Ck factor Object Type Analog Input Present Value 20 Ck factor Description Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Out Of Service 0
Object Identifier AI-16 Object Name Ck factor Object Type Analog Input Present Value 20 Ck factor Description Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Units hertz
Object Name Ck factor Object Type Analog Input Present Value 20 Description For dynamic freq. Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Object Identifier AI-16
Ck factor AI,16 Object Type Analog Input Present Value 20 Description For dynamic freq. Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Object Name Ck factor
Ck factor AI,16 Present Value 20 Status Flags For dynamic freq. Event State NORMAL Out Of Service 0 Units No units Object Type Analog Input
Ck factor AI,16 Description For dynamic freq. Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Present Value 20
Status Flags F,F,F,F { } Event State NORMAL Out Of Service 0 Units No units Ck factor AI,16 Description For dynamic freq.
Event State NORMAL Out Of Service 0 Units No units Status Flags F,F,F,F { }
Out Of Service 0
Units No units
Event State NORMAL
Units No units Out Of Service 0
Units No units
Page 22
Object Identifier AI-17
Object Name Dynamic Frequency
Object Type Analog Input
Present Value 1
Dynamic frequency AI,17 Description Dynamic frequency value
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units hertz
Object Identifier AI-18
Object Name Minimum noise level
Object Type Analog Input
Present Value 1
Minimum noise level AI,18 Description Squelch noise lvl
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
Object Identifier AI-19
Object Name F/S cutoff
Object Type Analog Input
Present Value 1
F/S cutoff AI,19 Description % of full scale
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
Object Identifier AI-20
Object Name Gain
Object Type Analog Input
Present Value 1
Gain AI,20 Description Signal gain
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
Object Identifier AI-21
Object Name Amplitude
Object Type Analog Input
Present Value 1
Amplitude AI,21 Description In ADC counts
Status Flags F,F,F,F { }
Event State NORMAL
Out Of Service 0
Units No units
Page 23
BACnet Object Name Obj, Instance BACnet Object Property Default/Sample Values
Object Identifier BI-1
Object Name Binary XDR fault
Object Type Binary Input
Present Value 0= good, 1=fault
Binary XDR fault BI-1 Description Binary XDR fault
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-2
Object Name Pressure over range
Object Type Binary Input
Present Value 0= good, 1=fault
Pressure over range BI-2 Description Pressure over range
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-3
Object Name Temperature fault
Object Type Binary Input
Present Value 0= good, 1=fault
l'emperature fault BI-3 Description Temperature fault
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-4
Object Name Temperature over range
Object Type Binary Input
Present Value 0
Temperature over range BI-4 Description Temperature overrange
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-5
Object Name Flow sensor error
Object Type Binary Input
- Present Value 0= good, 1=fault
Flow sensor error BI-5 Description Flow sensor error
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-6
Object Name SD card error
Object Type Binary Input
Present Value 0= good, 1=fault
SD card error BI-6 Description SD card error
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Page 24
BACnet Object Name Obj, Instance BACnet Object Property Default/Sample Values
Object Identifier BI-7
Object Name Communication error
Object Type Binary Input
Communication or ror Present Value 0=good, 1=fault
Communication error BI-7 Description Communication error
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-8
Object Name MCU error
Object Type Binary Input
MCU orror рі о Present Value 0=good, 1=fault
DI-O Description MCU error
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-9
Object Name Display button stuck
Object Type Binary Input
Display by the study ПО Present Value 0=good, 1=fault
Display button stuck BI-9 Description Display button stuck
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-10
Object Name BACnet communication error
Object Type Binary Input
BACnet communication DI 10 Present Value 0=good, 1=fault
error BI-10 Description BACnet comm error
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BI-11
Object Name Latched on bad signal
Object Type Binary Input
Latchad on had signal DI 11 Present Value 0=good, 1=fault
Lateried on bad signal DI-TT Description Latched on bad signal
Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Object Identifier BO-1
Object Name Reset Totalizer
Object Type Binary Output
Present Value 0= run, 1=reset
Description Reset totalizer
Reset BO-1 Status Flags F,F,F,F { }
Event State 0
Out Of Service 0
Priority 1
Priority Array NULL
Relinquish Default Inactive

24

Page 25

Chapter 5: Engineering Units

BACnet/ASHRAE supports a defined list of engineering units using enumerators (base 10 numbers) ranging from 0 to 255. For example, let's say your 240i is using a flow rate in ft3/min for flow units. The 240i BACnet interface will send a unit enumerator of 84 to your BACnet client. Since 84 is on the standard list of engineering units, the BACnet client will display "cubic-feet-per-minute." When at all possible, we have tried to use standard BACnet engineering units.

Proprietary BACnet engineering units are custom engineering units which the manufacturer (Sierra Instruments) defines that have an enumerator greater than 255. These custom unit enumerators may not be automatically translated into English, so your BACnet client may just display a number greater than 255. You will need to look that number up on the Sierra Custom Units Matrix below. Your BACnet client may have a way for you to add these custom units manually.

Units Not Supported by BACnet

BACnet does not support absolute and gauge pressure, so we have decided to assume gauge pressure. Example: "psig" will be displayed as "pounds-force-per-square-inch" and "psia" will use the custom enumerator of 387.

BACnet does not support standardized volume units like standard-cubic-feet-per-minute and normal-cubic-meters-per-minute. These will use the Sierra Custom Units below.

Sierra Custom Units Matrix
Enumerator Engineering Unit name Enumerator Engineering Unit name
256 grams-per-hour 346 imperial-gallons-per-second
257 grams-per-day 347 imperial-gallons-per-hour
258 grams-per-year 348 imperial-gallons-per-day
259 kilograms-per-day 349 imperial-gallons-per-year
260 kilograms-per-year 350 us-liquid-barrels-per-second
261 pounds-mass-per-day 351 us-liquid-barrels-per-minute
262 pounds-mass-per-year 352 us-liquid-barrels-per-hour
263 short-tons-per-second 353 us-liquid-barrels-per-day
264 short-tons-per-minute 354 us-liquid-barrels-per-year
266 short-tons-per-day 355 liters-per-day
267 short-tons-per-year 356 liters-per-year
268 long-tons-per-second 357 million-liters-per-second
269 long-tons-per-minute 358 million-liters-per-minute
270 long-tons-per-hour 359 million-liters-per-hour
271 long-tons-per-day 360 million-liters-per-day
272 long-tons-per-year 361 million-liters-per-year
Page 26
Sierra Custom Units Matrix
Enumerator Engineering Unit name Enumerator Engineering Unit name
273 metric-tons-per-second 362 cubic-meters-per-day
274 metric-tons-per-minute 363 cubic-meters-per-year
275 metric-tons-per-hour 364 cubic-feet-per-day
276 metric-tons-per-day 365 cubic-feet-per-year
277 metric-tons-per-year 366 beer-barrels-per-second
278 standard-cubic-feet-per-second 367 beer-barrels-per-minute
279 standard-cubic-feet-per-minute 368 beer-barrels-per-hour
280 standard-cubic-feet-per-hour 369 beer-barrels-per-day
281 standard-cubic-feet-per-day 370 beer-barrels-per-year
282 standard-cubic-feet-per-year 381 standard-feet-per-second
thousand-standard-cubic-feet-per-
283 second 382 standard-feet-per-minute
284 minute 383 standard-feet-per-hour
thousand-standard-cubic-feet-per-
285 hour 384 standard-feet-per-day
286 thousand-standard-cubic-reet-per-
day
385 standard-feet-per-vear
200 thousand-standard-cubic-feet-per-
287 year 386 feet-per-hour
288 million-standard-cubic-feet-per-
second
387 feet-ner-day
200 million-standard-cubic-feet-per- 307
289 minute 388 feet-per-year
200 million-standard-cubic-feet-per- 200 motors por day
290 million standard cubic foot por day 200 meters per voar
291 million-standard-cubic-feet-per-uay 300 meters-per-year
292 year 391 standard-meters-per-second
293 normal-cubic-feet-per-second 392 standard-meters-per-minute
294 normal-cubic-feet-per-minute 393 standard-meters-per-hour
295 normal-cubic-feet-per-hour 394 standard-meters-per-day
296 normal-cubic-feet-per-day 395 standard-meters-per-year
297 normal-cubic-feet-per-year 396 normal-meters-per-second
298 standard-cubic-meters-per-second 397 normal-meters-per-minute
299 standard-cubic-meters-per-minute 398 normal-meters-per-hours
300 standard-cubic-meters-per-hour 399 normal-meters-per-day
301 standard-cubic-meters-per-day 400 normal-meters-per-year
302 standard-cubic-meters-per-year 401 Inches-per-second
303 normal-cubic-meters-per-second 402 Inches-per-minute
304 normal-cubic-meters-per-minute 403 Inches-per-hour
Page 27
Sierra Custom Units Matrix
Enumerator Engineering Unit name Enumerator Engineering Unit name
305 normal-cubic-meters-per-hour 404 Inches-per-day
306 normal-cubic-meters-per-day 405 Inches-per-year
307 normal-cubic-meters-per-year 406 standard-cubic-feet
308 standard-liters-per-second 407 thousand-standard-cubic-
feet
309 standard-liters-per-minute 408 million-standard-cubic-feet
310 standard-liters-per-hour 409 normal-cubic-feet
311 standard-liters-per-day 410 standard-cubic-meters
312 standard-liters-per-year 411 normal-cubic-meters
313 normal-liters-per-second 412 standard-liters
314 normal-liters-per-minute 413 normal-liters
315 normal-liters-per-hour 415 long-tons
316 normal-liters-per-day 416 metric-tons
317 normal-liters-per-year 420 million-us-gallons
321 pounds-mass-per-day 421 us-liquid-barrels
322 pounds-mass-per-year 422 million-liters
327 cubic-feet-per-year 423 pounds-per-cubic-foot
331 cubic-meters-per-day 425 beer-barrels
332 cubic-meters-per-year 426 degrees-rankin
336 liters-per-day 427 pounds-per-square-inch-
absolute
337 liters-per-year 429 bar-absolute
338 us-gallons-per-second 430 kilopascals-absolute
339 us-gallons-per-day 432 pascal-second
340 us-gallons-per-year 433 inches-of-water-absolute
341 million-us-gallons-per-second 434 mm-h2o-absolute
342 million-us-gallons-per-minute 435 mm-h2o-gauge
343 million-us-gallons-per-hour 436 kg-per-square-centimeter-
absolute
344 million-us-gallons-per-day 437 kg-per-square-centimeter-
gauge
345 million-us-gallons-per-year 1000 Error

*Unit 1000 indicates a unit error, i.e. no total unit for a pure velocity flow unit.

Page 28

Chapter 6: Troubleshooting Tips

The BACnet board has two LEDs that may help during troubleshooting.

  • 1. "LED1" and "LED2" will light Red during initialization, and then turn off after initialization is over.
  • 2. "LED1" indicates communication between the BACnet board and the 240i/241i. It should blink green when the 240i/241i communicates to the BACnet board.
  • 3. "LED2" indicates communication between the BACnet board and your BACnet network. Once the network is running and connected it should also blink green.

Other Troubleshooting Tips

1. Verify polarity on the communication cable. RS-485 achieves binary transmission by switching the voltage polarity between A- and B+. The differential voltage should be between 7V and 1.5V while the bus is actively communicating. Sierra verifies the 240i/241i is correct per the EIA RS-485 spec.

We have found cases where other devices with "A" and "B" reversed and sometimes marked as "A+" and "B-." If in doubt, swap "A" and "B."

  • 2. Ensure that all devices have a unique MAC address and Device Instance.
  • 3. Ensure that all software device instances are unique on the whole network.
  • 4. Validate that the baud rate and parity is the same for all devices including repeaters (if used).
  • 5. Make sure there are no more than two EOL terminations resistors present on the same segment. No intermediate device should have an EOL resistor.
  • 6. If you are having trouble, try removing other devices on the bus temporarily.
  • 7. In order to help narrow down a communication issue, divide the network in half and verify if the devices come online. Repeat the operation until the network is functional.
  • 8. Swap a working and a non-working device. If the problem moved with the device, then it indicates a configuration issue or problematic device. If the problem stays at the same location, then it indicates a wiring issue.
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