FieldServer FS-8700-73 User Manual

Driver Version:

2.01

Document Revision:

3

APPLICABILITY & EFFECTIVITY

Effective for all systems manufactured after February 2012

Driver Manual

(Supplement to the FieldServer Instruction Manual)

FS-8700-73 BACnet MSTP - Serial

A Sierra Monitor Company

FS-8700-73 BACnet MSTP Manual Table of Contents

TABLE OF CONTENTS

1 BACnet MSTP Description ...................................................................................................................................... 4

1.1 BTL Mark – BACnet Testing Laboratory ......................................................................................................... 4

2 Driver Scope of Supply ........................................................................................................................................... 5

2.1 Supplied by FieldServer Technologies for this driver ..................................................................................... 5

2.2 Provided by the Supplier of 3rd Party Equipment .......................................................................................... 5

2.2.1 Hardware ............................................................................................................................................... 5

2.2.2 Optional Items ....................................................................................................................................... 5

3 Hardware Connections .......................................................................................................................................... 6

3.1 Hardware connection Tips/Hints ................................................................................................................... 7

3.2 Connection Notes .......................................................................................................................................... 7

4 Data Array Parameters .......................................................................................................................................... 8

5 Configuring the FieldServer as a BACnet MSTP Client ........................................................................................... 9

5.1 Specify the MAC_Address of the FieldServer ................................................................................................ 9

5.2 Client Side Connection Parameters ............................................................................................................. 10

5.3 Client Side Node Parameters ....................................................................................................................... 11

5.4 Client Side Map Descriptor Parameters ....................................................................................................... 11

5.4.1 FieldServer Specific Map Descriptor Parameters ................................................................................. 11

5.4.2 Driver Specific Map Descriptor Parameters ......................................................................................... 12

5.4.3 Timing Parameters ............................................................................................................................... 12

5.4.4 Map Descriptor Example. ..................................................................................................................... 13

6 Configuring the FieldServer as a BACnet MSTP Server ........................................................................................ 14

6.1 Driver Specific FieldServer Parameters ........................................................................................................ 14

6.2 Server Side Connection Parameters ............................................................................................................ 15

6.3 Server Side Node Parameters ...................................................................................................................... 16

6.4 Server Side Map Descriptor Parameters ...................................................................................................... 16

6.4.1 FieldServer Specific Map Descriptor Parameters ................................................................................. 16

6.4.2 Driver Specific Map Descriptor Parameters ......................................................................................... 16

6.4.3 Map Descriptor Example. ..................................................................................................................... 18

Appendix A. Useful Features ....................................................................................................................................... 19

Appendix A.1. BACnet object names ....................................................................................................................... 19

Appendix A.2. Network number .............................................................................................................................. 19

Appendix A.3. Accessing Data from BACnet Properties comprising Arrays of Values ............................................. 20

Appendix A.4. FieldServer implementation of BACnet priority Arrays .................................................................... 20

Appendix A.4.1. Accessing Priority Array information...................................................................................... 21

Appendix A.5. Relinquishing Control of a Point as a Client ..................................................................................... 22

Appendix A.6. BACnet State Text Preload ............................................................................................................... 22

Appendix A.6.1. Method 1 – Using an Offset/User Table: ................................................................................ 23

Appendix A.6.2. Method 2 – Using a Single Data Array: .................................................................................. 23

Appendix A.6.3. Using Intrinsic Reporting for a Multistate Value .................................................................... 24

Appendix A.7. COV and Intrinsic Reporting ............................................................................................................. 24

Appendix A.7.1. Notes on COV configuration: .................................................................................................. 24

Appendix A.7.2. Notes on Intrinsic Reporting configuration: ........................................................................... 25

Appendix A.7.3. Map Descriptor Example - COV .............................................................................................. 26

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FS-8700-73 BACnet MSTP Manual Table of Contents

Appendix A.7.4. Map Descriptor Example - Enable or Disable COV ................................................................. 26

Appendix A.7.5. Map Descriptor Example – Intrinsic Reporting ....................................................................... 26

Appendix A.7.6. Setting the Priority of Intrinsic Alarming ................................................................................ 26

Appendix A.7.7. Map Descriptor Example – Set up a Permanent Static Recipient List .................................... 27

Appendix A.8. Factors Determining the Reliability Property ................................................................................... 28

Appendix A.9. Specifying ReadPropertyMultiple and WritePropertyMultiple Transactions using Linked Map

Descriptors ............................................................................................................................................................... 28

Appendix A.10. Update Property Function .............................................................................................................. 31

Appendix A.10.1. Supported values: ................................................................................................................. 31

Appendix A.10.2. Mode of Operation when used for the Relinquish_Default property: .................................. 31

Appendix A.11. Disabling selected BACnet services ................................................................................................ 31

Appendix A.12. Using a .ini file to set the Vendor_ID and Vendor_Name of the Device Object............................. 33

Appendix B. Troubleshooting ...................................................................................................................................... 34

Appendix B.1. Debugging a BACnet connection ...................................................................................................... 34

Appendix B.2. COV Configuration ............................................................................................................................ 34

Appendix B.3. BACnet Specific Statistics ................................................................................................................. 34

Appendix B.4. BACnet Specific Error Messages ....................................................................................................... 35

Appendix B.5. BACnet Error Response Decoding .................................................................................................... 35

Appendix B.5.1. BACnet Error CLASS ................................................................................................................ 35

Appendix B.5.2. BACnet Error CODES for Error Class OBJECT ........................................................................... 36

Appendix B.6. Rediscovering Offline Devices .......................................................................................................... 37

Appendix B.7. Timeout Errors .................................................................................................................................. 37

Appendix B.8. PDU limit reached errors .................................................................................................................. 37

Appendix C. Vendor Information ................................................................................................................................. 38

Appendix C.1. McQuay ............................................................................................................................................ 38

Appendix C.2. Trane................................................................................................................................................. 38

Appendix C.3. Liebert .............................................................................................................................................. 38

Appendix C.4. Automated Logic Corporation. ......................................................................................................... 38

Appendix C.5. Honeywell EBI ................................................................................................................................... 38

Appendix C.6. Using Cimetrics Explorer................................................................................................................... 38

Appendix D. Reference ................................................................................................................................................ 41

Appendix D.1. Object_Type Legal Values – Abbreviation Descriptions ................................................................... 41

Appendix D.2. Property Legal Values ....................................................................................................................... 41

Appendix D.3. Units ................................................................................................................................................. 43

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FieldServer Mode

Nodes

Comments

Client

1 Server

32

1 BACNET MSTP D E S C R I PTION

The BACnet Master-Slave/Token-Passing (MSTP) driver implements a data link protocol that uses the services of
the RS-485 physical layer. See the FieldServer BACnet PIC statement for the level of conformance that this driver
implements.

All information in a BACnet system is represented in terms of objects. The Object_Identifier is a 32-bit code that
identifies the type of Object (also identified by the Object_Type Property) and its "Instance" number, which
together uniquely identify the Object within its BACnet device. Theoretically, a BACnet device could have over four
million Objects of a particular type. The Object_Name is a text string, which has a unique capability. BACnet
devices may broadcast queries for devices that contain Objects with a specific Object_Name. This can greatly
simplify project setup.

BACnet requires one Device Object to be present in every BACnet device. The Device Object makes information
about the device and its capabilities available to other devices on the networks. Before one BACnet device starts
control-related communications with another, it needs to obtain some of the information presented by the other
device's Device Object. Unlike other Objects, the Device Object's Instance number must be unique across the
entire BACnet internetwork because it is used to uniquely identify the BACnet devices. It may be used to
conveniently identify the BACnet device from other devices during installation.

Standard object types are used to hold real time data and other information. Each Object Type is referenced by a
number, for example 0 represents an Analog Input.

Each Object consists of a number of prescribed properties, the main property being the Present_Value. Objects
are monitored and controlled through their properties. The Analog Input Object is representative of the Objects
involved directly with control elements and many of its Properties reflect this.

The information that follows describes how to expand upon the factory defaults provided in the configuration files
included with the FieldServer.

BTL Mark – BACnet Testing Laboratory

The BTL mark is a symbol that indicates to a consumer that a product has passed a
series of rigorous tests conducted by an independent laboratory which verifies that the
product correctly implements the BACnet features claimed in the listing. The mark is a
symbol of a high-quality BACnet product. For more information about the BACnet
Testing Laboratory go to: http://www.bacnetinternational.net/btl/.

Max Nodes Supported

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FieldServer Technologies PART #

Description

FS-8917-16

RJ45 to terminal connector cable

Part #

Description

BACnet Controller(s) on RS-485 Network

PART #

Vendor/Manufacturer

Description

FS-4301-00

FieldServer

RS-232 to RS-485 converter

2 DRIVER SCOPE OF SUP P LY

Sup plie d by FieldServer Technologies for t his d river

Provided by the Supplier of 3rd Party Equipment

Har d w a r e

Optional Items

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DATE: 5/26/06
BY: MC

(408)-262-2299

BASE NAME:
FILE NAME: 8700-73 .VSD

FIELDSERVER

BACNET MSTP

CONNECTION DIAGRAM

FieldServer

+

-

Gnd

Server 1

+

-

Gnd

Server 1

+

-

Gnd

Server n

+

-

Gnd

Client

+

-

Gnd

FieldServer

+

-

Gnd

Server 2

+

-

Gnd

Server n

+

-

Gnd

FieldServer as a BACnet MSTP Client

FieldServer as a BACnet MSTP Server

3 HARDWARE CONNE CTIONS

The FieldServer is connected to the BACnet MSTP as shown in connection drawing.

Configure the BACnet MSTP according to manufacturer’s instructions

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R1

-

+

FieldServer

GND

100

1/2 W

TD(A)

TD(B)

RD(A)

RD(B)

GND

485SDD16

TD(A)

TD(B)

RD(A)

RD(B)

GND

485SDD16

100

1/2 W

100

1/2 W

RS-485 2-wire Connection

Har d w a r e connection Tips/Hints

Follow standard RS-485 2-wire guidelines for installation. See connection diagram below.

Connection Notes

The x25 and the QuickServer do not support being configured as a BACnet MSTP client on one port and a BACnet
MSTP server on another port at the same time. The x40 and the x30 support this.

In order for this to work the BACnet MSTP server section must be configured first.

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Section Title

Data_Arrays

Column Title

Function

Legal Values

Data_Array_Name

Provide name for Data Array

Up to 15 alphanumeric
characters

Data_Array_Format

Provide data format. Each Data Array can only take on one
format.

Float, Bit, Uint16, Uint32,
Sint16, Sint32, Byte

Data_Array_Length

Number of Data Objects. Must be larger than the data
storage area required by the Map Descriptors for data placed
in this array.

1-10, 000
// Data Arrays

Data_Arrays

Data_Array_Name

, Data_Array_Format

, Data_Array_Length

DA_AI_01

, Float

, 200

DA_AO_01

, Float

, 200

DA_DI_01

, Bit

, 200

DA_DO_01

, Bit

, 200

4 DATA ARR AY PA R A M E TER S

Data Arrays are “protocol neutral” data buffers for storage of data to be passed between protocols. It is necessary

to declare the data format of each of the Data Arrays to facilitate correct storage of the relevant data.

Example

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Section Title

FieldServer

Column Title

Function

Legal Values

System_Node_ID

Specify the MAC_Address of the FieldServer.

1-254

// Bridge

Bridge

Title

, System_Node_ID

BACnet_MSTP

, 11

5 CONFIGURING T H E F I E L DSERVER AS A BACNET MSTP C L I ENT

For a detailed discussion on FieldServer configuration, please refer to the FieldServer Configuration Manual. The
information that follows describes how to expand upon the factory defaults provided in the configuration files
included with the FieldServer (See “.csv” sample files provided with the FieldServer).

This section documents and describes the parameters necessary for configuring the FieldServer to communicate
with a BACnet MSTP Server.

The configuration file tells the FieldServer about its interfaces, and the routing of data required. In order to enable
the FieldServer for BACnet MSTP communications, the driver independent FieldServer buffers need to be declared
in the “Data Arrays” section, the destination device addresses need to be declared in the “Client Side Nodes”
section, and the data required from the servers needs to be mapped in the “Client Side Map Descriptors” section.
Details on how to do this can be found below.

Note that in the tables, * indicates an optional parameter, with the bold legal value being the default.

Spe cify the MAC_Address o f the FieldServer

The MAC_Address is used on the Data_Link (or physical) layer as the source or destination address. See section

9.1.1.2 of the BACnet ANSI/ASHREA standard for more information.

Example

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Section Title

Connections

Column Title

Function

Legal Values

Port

Specify which port the device is connected to the FieldServer

P1-P81, R1-R22

Baud

Specify baud rate

9600, 19200, 38400,
76800

3

Parity*

Specify parity

Odd, Even, None

Data_Bits*

Specify data bits

7, 8

Stop_Bits*

Specify stop bits

1, 2

Protocol

Specify protocol used

BACnet_MSTP

Poll Delay*

Time between internal polls

0-32000s, 1s

Timeout

Application logger timeout

30s

Max_Master*

Specify the highest MAC_Address for Master nodes. When
designing a MSTP network with multiple Master_Node devices,
allocate the MAC_Address settings on the different devices starting
at 1. This will allow you to specify a small Max_Master parameter
and hence will improve overall network performance

1-127

Max_Info_Frames

Specify the maximum number of information frames the connection
may send before it must pass the token.

1-65535
// Client Side Connections

Connections

Port

, Baud

, Parity

, Data_Bits

, Stop_Bits

, Protocol

, Poll_Delay

, Timeout

R1

, 38400

, None

, 8

, 1

, BACnet_MSTP

, 0.100s

, 30s

1
2

3

Clie nt Side Connection Parameters

Example

P1 to P8 will require the optional RS-485 converter (Part # 4301-00)
Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction manual for details of the ports available

on specific hardware.

76800 baud is supported on the X30, X25 and ProtoCessor but not on the X20 and X40

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Section Title

Nodes

Column Title

Function

Legal Values

Node_Name

Provide name for Node

Up to 31 alphanumeric
characters

Node_ID

Specify the BACnet Device object instance.

1 - 16777215

Protocol

Specify protocol used

BACnet_MSTP

Port

Specify port

P1-P84, R1-R25

MAC_Address

MAC_Address of the physical server node.

1-127 (for Master Nodes)
1-254 (for Slave Nodes)

Network_Number*

Use this parameter if the remote MSTP server device is on
another BACnet network connected via a router.

1, 2, 3.... 16 bit positive

numbers, 5

Retries*

Number of timeouts before the Node goes offline.

0,1,2,3

// Client Side Nodes

Nodes

Node_Name

, Node_ID

, Protocol

, Port

, Retries

DEV_1

, 1

, BACnet_MSTP

, R1

, 2

Column Title

Function

Legal Values

Map_Descriptor_Name

Name of this Map Descriptor. This is used for
Object_Name Property. Ensure that unique names
are configured for each device. Refer to Appendix
A.1.

Up to 37 alphanumeric
characters

Data_Array_Name

Name of Data Array where data is to be stored in the
FieldServer

One of the Data Array names
from Section 4

Data_Array_Offset

Starting location in Data Array

0 to (“Data_Array_Length” -1)
as specified in Section 4

Function

Function of Client Map Descriptor

Rdbc, Wrbc, Wrbx, Arcs

4
5

Clie nt Side Node Parame t e r s

Either Node_ID OR MAC_Adddress must be specified. If the Server Node supports Who-Is and I-Am then it is
better to use the Node_ID parameter.

Example

Clie nt Side Map Descriptor Parameters

Fie ldServer Specific Ma p D e script o r Parameters

P1 to P8 will require the optional RS-485 converter (Part # 4301-00)
Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction manual for details of the ports available

on specific hardware.

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Column Title

Function

Legal Values

Node_Name

Name of Node to fetch data from

One of the Node names
specified in Section 0

Object_Type
(Alias = Data_Type)

Type of object. Refer to Appendix D.1 for more
information.

AI, AO, AV, BI, BO, BV, MI,
MO, MV, NC

Object_Instance
(Alias = Address)

Instance of the object on the device.

0, 1, 2, 3, …4194303
Property

The BACnet property to be read.

Refer to Appendix D.2

Data_Array_Low_Scale*

Scaling zero in Data Array

-32767 to 32767, 0

Data_Array_High_Scale*

Scaling max in Data Array

-32767 to 32767, 100

Node_Low_Scale*

Scaling zero in Connected Node

-32767 to 32767, 0

Node_High_Scale*

Scaling max in Connected Node

-32767 to 32767, 100

Length*

Used to create an array of sequential Object_Instances
on an Object_Type.

1 to max point count of
the FieldServer, 1

Array_Index*

When referencing Multistate properties, allows the
user to specify the index of the property to be read. If 1
is specified, the first one will be read, if 2 is specified,
the second will be read, etc. If 0 is specified, the driver
will return the total number (count) of array items
linked to the property. If the parameter is not
specified, a list of all items will be returned. Refer to
Appendix A.3

0 to max number of array
items in the BACnet
Property, -

Write_Priority*

Allows the driver to specify the write priority used to
write an output.

1..16, 16

Linked_Map_Descriptors*

This parameter allows the linking of Map Descriptors to
an active read or write Map Descriptor in order to
construct a ReadPropertyMultiple or
WritePropertyMultiple transaction. Refer to Appendix
A.9

The name of a previously
defined active Map
Descriptor, -

Length*

When the optional Length parameter is set to a value N,
the Map Descriptor will include N consecutive instances
of the specified Object_Type. For example, if a Map
Descriptor specifies Object_Type, Address 4 and Length
3, this means that the AO instances 4, 5 and 6 will be
included in the read or write transaction. The
corresponding Data Array values are in consecutive
positions in the Data Array, starting at the specified
Data_Array_Offset.

Any positive integer that
falls between the range
of the Data_Array_Offset
and the
Data_Array_Length as
specified in Section 4, -
Refer also to Appendix
A.9

Column Title

Function

Legal Values

Scan_Interval*

Rate at which data is polled

0-32000, 2s

Driver Specific Map Descriptor Parameters

Timing Parameters

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// Client Side Map Descriptors

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Data_Type

, Object_Instance

, Property

, Scan_Interval

CMD_AI_01

, DA_AI_01

, 0

, Rdbc

, DEV_1

, AI

, 1

, Present_Value

, 20.000s

CMD_AI_02

, DA_AI_01

, 1

, Rdbc

, DEV_1

, AI

, 2

, Present_Value

, 20.000s

CMD_AI_03

, DA_AI_01

, 2

, Rdbc

, DEV_1

, AI

, 3

, Present_Value

, 20.000s

CMD_AO_01

, DA_AO_01

, 0

, Rdbc

, DEV_1

, AO

, 1

, Present_Value

, 30.000s

CMD_AO_02

, DA_AO_01

, 1

, Rdbc

, DEV_1

, AO

, 2

, Present_Value

, 30.000s

CMD_AO_03

, DA_AO_01

, 2

, Rdbc

, DEV_1

, AO

, 3

, Present_Value

, 30.000s

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Data_Type

, Object_Instance

, Property

, Scan_Interval

CMD_DI_01

, DA_DI_01

, 0

, Rdbc

, DEV_1

, BI

, 1

, Present_Value

, 15.000s

CMD_DI_02

, DA_DI_01

, 1

, Rdbc

, DEV_1

, BI

, 2

, Present_Value

, 15.000s

CMD_DI_03

, DA_DI_01

, 2

, Rdbc

, DEV_1

, BI

, 3

, Present_Value

, 15.000s

CMD_DO_01

, DA_DO_01

, 0

, Rdbc

, DEV_1

, BO

, 1

, Present_Value

, 30.000s

CMD_DO_02

, DA_DO_01

, 1

, Rdbc

, DEV_1

, BO

, 2

, Present_Value

, 30.000s

CMD_DO_03

, DA_DO_01

, 2

, Rdbc

, DEV_1

, BO

, 3

, Present_Value

, 30.000s

Map Descriptor Example.

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Section Title

Bridge

Column Title

Function

Legal Values

Title

FieldServer name

Text

System_Station_Address

The FieldServers MAC address on the MSTP network

1-254

// FieldServer Driver specific parameters

Bridge

Title

, System_Station_Address

BacNet MSTP Server V1.02a

, 11

6 CONFIGURING T H E F I E L DSERVER AS A BACNET MSTP S E R VE R

For a detailed discussion on FieldServer configuration, please refer to the FieldServer Configuration Manual. The
information that follows describes how to expand upon the factory defaults provided in the configuration files
included with the FieldServer (See “.csv” sample files provided with the FieldServer).

This section documents and describes the parameters necessary for configuring the FieldServer to communicate
with a BACnet MSTP Client.

The configuration file tells the FieldServer about its interfaces, and the routing of data required. In order to enable
the FieldServer for BACnet MSTP communications, the driver independent FieldServer buffers need to be declared
in the “Data Arrays” section, the FieldServer virtual node(s) needs to be declared in the “Server Side Nodes”
section, and the data to be provided to the Clients needs to be mapped in the “Server Side Map Descriptors”
section. Details on how to do this can be found below.

Note that in the tables, * indicates an optional parameter, with the bold legal value being the default.

Driver Specific FieldServer Parame t e r s

Example

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Section Title

Connections

Column Title

Function

Legal Values

Port

Specify which port the device is connected to the FieldServer

P1-P86, R1-R27

Baud*

Specify baud rate

9600, 19200, 38400,
76800

8

Parity*

Specify parity

None, Odd, Even

Data_Bits*

Specify data bits

7, 8

Stop_Bits*

Specify stop bits

1, 2

Protocol

Specify protocol used

BACnet_MSTP

Connection_Type*

Specify if the connection must be in Master_Mode or in
Slave_Mode

MSTP_Master_Mode

MSTP_Slave_Mode

Max_Master*

Specify the highest possible MAC_Address that exists on the
MSTP network. Only applicable for MSTP_Master Mode
connections. (See also section 4.7)

9

1-127

Max_Info_Frames*

Specify the maximum number of information frames the
connection may send before it must pass the token. Only
applicable for MSTP_Master Mode connections. 9

1-65535
// Server Side Connections

Connections

Port

, Baud

, Parity

, Data_Bits

, Stop_Bits

, Protocol

, Timeout

, Connection_Type

R1

, 38400

, None

, 8

, 1

, BACnet_MSTP

, 30

, MSTP_Master_Mode

6
7

8
9

If the Server connection needs to operate in Slave Mode then specify the
Connection_Type as MSTP_Slave_Mode

Server Side Connection P aram eters

Example

P1 to P8 will require the optional RS-485 converter (Part # 4301-00)
Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction manual for details of the ports available

on specific hardware.

76800 baud is supported on the X30, X25 and ProtoCessor but not on the X20 and X40

For Server configurations the Max_Master and Max_Info_Frames parameters (or properties) can be overridden from a BACnet Client by using
the “Write Property” command. Note that when the FieldServer is restarted, the default values specified in the configuration file will be
applied

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Section Title

Nodes

Column Title

Function

Legal Values

Node_Name

Provide name for Node

Up to 31 alphanumeric
characters

Node_ID

BACnet station address of physical Server node

1 - 16777215

Protocol

Specify protocol used

BACnet_MSTP

Node_Option*

Enable or disable COV for this Node. Refer to Appendix A.7 for
further information.

COV_Enable, COV_Disable, -

Model_Name*

Sets the Model Name Property of the Device Object

Up to 32 alphanumeric
characters

// Server Side Nodes

Nodes

Node_Name

, Node_ID

, Protocol

, Model_Name

11

Virtual_DEV_11

, 11

, BACnet_MSTP

, WBA11M. MSTP

Column Title

Function

Legal Values

Map_Descriptor_Name

Name of this Map Descriptor. This is used for
Object_Name Property. Refer to Appendix A.1.

Up to 37 alphanumeric characters

Data_Array_Name

Name of Data Array where data is to be stored
in the FieldServer

One of the Data Array names from
Section 4

Data_Array_Offset

Starting location in Data Array

0 to (“Data_Array_Length” -1) as
specified in Section 4

Function

Function of Server Map Descriptor

Passive

Column Title

Function

Legal Values

Node_Name

Name of Node to fetch data from

One of the Node Names specified in
Section 0.

Object_Type
(Alias = Data_Type)

Data type in Controller

AI, AO, AV, BI, BO, BV, MI, MO, MV, NC.
Refer to Appendix A.1.

10

11

Server Side Node Paramete rs10

Example

Server Side Map Descriptor P arameters

Fie ldServer Specific Ma p D e script o r Parameters

Driver Specific Map Descriptor Parameters

Only one Server Node may be defined for each connection. For information on support for multiple virtual server nodes on a single

connection please contact the Sales Department."

Note that Port is not declared in the Server Side Nodes

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Column Title

Function

Legal Values

Object_Instance
(Alias = Address)

Instance of the Object on the Device.

0, 1, 2, 3, …4194303
Units*

The object units

Refer to Appendix D.3, m2

Data_Array_Low_Scale*

Scaling zero in Data Array

-32767 to 32767, 0

Data_Array_High_Scale*

Scaling max in Data Array

-32767 to 32767, 100

Node_Low_Scale*

Scaling zero in Connected Node

-32767 to 32767, 0

Node_High_Scale*

Scaling max in Connected Node

-32767 to 32767, 100

Active_Text12*

Specify the Active Text property of the
Object

Any text string of length up to 40
characters, Active

Inactive_Text12*

Specify the Inactive Text property of the
Object

Any text string of length up to 40
characters, Inactive

Relinquish_Default12

Specify the value to be returned as
Present_Value on startup or when control
is relinquished. Must be specified for
outputs. Refer to Appendix D.2

Any Float value
Length*

Used to create an array of sequential
Object_Instances on an Object_Type.

1 to max point count of the FieldServer,
1

Notification_Class*

Specify the Mapdescriptor_Name of the
Notification_Class Object that manages
Intrinsic Reporting for this Map Descriptor.
Refer to Appendix A.7.

One of the configured
Mapdescriptor_Names of type NC
(Notification Class). Objects are not
available to any NC if left out.

Ack_Required*

For a Notification_Class Object, specify
whether EventNotifications require a user
Acknowledgement. Refer to Appendix A.7.

Yes, No

COV_Increment*

For a Server Map Descriptor of type AO or
AI, initialize the COV_Increment property.
Refer to Appendix A.7.

Any Float value, 0

Input_alarm_State*

For binary points the user can specify
which of the states (0 or 1) to regard as an
alarm state.

0, 1

Description*

Specify the object’s description property.
E.g. Room Temp – Refer to Appendix A.7.3

Any text string of length up to 40
characters, If not configured, defaults
to Object_Name.

Process_ID*

The handle of a process within the
recipient device that is to receive the event
notification. Refer to Appendix A.7.6.

Any Unsigned integer, -

Notification_Class_MD*

This is the Notification Class map
descriptor governing the sending of Event
Notifications (Intrinsic Alarming) Refer to
Appendix A.7.6

Map Descriptor defined per Appendix
A.7

12

See the BACnet DFS to determine if a particular object supports this property

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// Server Side Map Descriptors

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Object_Type

, Object_Instance

, Units

SMD_AI_01

, DA_AI_01

, 0

, Passive

, Virtual_DEV_11

, AI

, 1

, Degrees-Fahrenheit

SMD_AI_02

, DA_AI_01

, 1

, Passive

, Virtual_DEV_11

, AI

, 2

, Degrees-Fahrenheit

SMD_AI_03

, DA_AI_01

, 2

, Passive

, Virtual_DEV_11

, AI

, 3

, Degrees-Fahrenheit

SMD_AO_01

, DA_AO_01

, 0

, Passive

, Virtual_DEV_11

, AO

, 1

, percent-relative-humidity

SMD_AO_02

, DA_AO_01

, 1

, Passive

, Virtual_DEV_11

, AO

, 2

, percent-relative-humidity

SMD_AO_03

, DA_AO_01

, 2

, Passive

, Virtual_DEV_11

, AO

, 3

, percent-relative-humidity

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Object_Type

, Object_Instance

SMD_DI_01

, DA_DI_01

, 0

, Passive

, Virtual_DEV_11

, BI

, 1 SMD_DI_02

, DA_DI_01

, 1

, Passive

, Virtual_DEV_11

, BI

, 2 SMD_DI_03

, DA_DI_01

, 2

, Passive

, Virtual_DEV_11

, BI

, 3 SMD_DO_01

, DA_DO_01

, 0

, Passive

, Virtual_DEV_11

, BO

, 1 SMD_DO_02

, DA_DO_01

, 1

, Passive

, Virtual_DEV_11

, BO

, 2 SMD_DO_03

, DA_DO_01

, 2

, Passive

, Virtual_DEV_11

, BO

, 3

Map Descriptor Example.

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Section Title

Bridge

Column Title

Function

Legal Values

Title

FieldServer name

Text

Network_number*

Specify a unique network number if there are multiple virtual Server nodes.

1-65534, 5

// FieldServer Driver specific parameters

Bridge

Title

, Network_Number

BACnet Server

, 6

Appendix A. Useful Features

Appendix A.1. BACnet object names

When an external BACnet Client builds a list of Object Names, the BACnet Server Map Descriptor names determine
the BACnet Object Name. If the Map Descriptor length is greater than 1, the Object Name will be suffixed with the
index into the Map Descriptor. For example, if the Map Descriptor name is SMD_AI_01 and the length 3, then the
Object Names will be SMD_AI_01[0], SMD_AI_01[1] and SMD_AI_01[2].

It is important that unique Map Descriptor names are created for each device to ensure that the Object Names are
unique.

Appendix A.2. Network number

If multiple BACnet Nodes are specified on the Server side, the FieldServer automatically defaults to virtual
operation. In effect, the FieldServer simulates a software router. BACnet identifies this FieldServer using a
combination of it’s network number and IP/MAC address. The default Network number of a FieldServer is 5. If
there is more than one FieldServer on a BACnet intranet with multiple nodes, the default network number of the
additional FieldServers will need to be changed and a unique number allocated to each.

A unique network number will need to be assigned if both of the following conditions are true:

The FieldServer has multiple BACnet Server nodes.
There is more than one FieldServer on a network which includes multiple BACnet nodes.

To override the FieldServer’s default network number 5 include the following in the configuration file:

Example

Note: While it is theoretically possible to have up to 65535 virtual nodes, it is recommended that a maximum of 32

is configured. If an application requires the configuration of more than 32 virtual nodes please consult FST.

Note 2: If an application demands multiple BACnet IP Server nodes and multiple BACnet MSTP Server Nodes
simultaneously, they will at present all appear with the same virtual network number. This creates a potential
conformance problem if there is an external BACnet router connecting the BACnet IP and BACnet MSTP networks
to which the FS is also connected, as duplicate virtual networks with the same network number would then exist in
the BACnet network, which is not permitted. Please contact FST for assistance.

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Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Data_Type

, Object_ID

, Property

, Array_Index

CMD_AI_01

, DA_AI_01

, 0

, Rdbc

, DEV_01

, AO

, 1

, Priority_Array

, 7

Appendix A.3. Accessing Data from BACnet Properties comprising Arrays of Values

Some BACnet Object properties (e.g. Priority_Array) are arrays of values (the Priority_Array property is an array of 16 value s). In order to read a specific array entry, the
Array_Index must be specified in the Map Descriptor. Array_Index is a Client Side Map Descriptor function

The following example shows a configuration that will read the Priority_Array value at Array_Index 7, belonging to Analog Output 1.

Details of the relevant BACnet properties and their associated arrays can be found in the BACnet Protocol Spec.

If no Array_Index is specified, then the entire property (i.e. the entire BACnet Array) is returned.

The Data_Index parameter functions as follows for ReadPropertyMultiple or WritePropertyMultiple requests when the Client Map Descriptor length N is greater than 1:

When an Array_Index is specified, the ReadPropertyMultiple or WritePropertyMultiple request will iterate through N successive Array_Index values for the given

Object and Property (e.g. Priority Array Index 1 to 16 of Analog Output 1)

When no Array_Index is specified, the ReadPropertyMultiple or WritePropertyMultiple request will iterate through N successive Object Instances, reading the

specified Property from each successive object (e.g. Present Value of Analog Output 1 to Analog Output 16)

Appendix A.4. FieldServer implementation of BACnet priority Arrays

When BACnet Output objects are written to the Server side of the FieldServer, an associated write priority is given to each write value. When the FieldServer receives the
write value, it stores it to the Map Descriptor Priority Array Table at the specified priority. The Priority Array Table is then scanned and the value with the h ighest priority
is stored to the Data Array location specified by the Map Descriptor.

When a Write “Relinquished” command is received, the value is removed from the Priority Array Table and the next highest value from the Priority Array Table is stored
to the Data Array.

If all values have been “Relinquished” from the Priority Array Table, then the Map Descriptors “Relinquish Default” value will be stored to the Data Array.

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Section Title

Map_Descriptors

Column Title

Function

Legal Values

DA_Pri_Array

Name of Data Array where the Priority Array Table will be stored. Location 0 is the Relinquish Default value and
locations 1 to 16 the different entries of the Priority Array Table.

Up to 16 alphanumeric
characters

DA_Pri_Array_Offset*

Starting location in Data Array.

1-65535 , 0

DA_Pri_In_Use

Name of Data Array that indicates if a particular Priority Value is in use. Location 0 indicates whether the Relinquish
Default has been set and locations 1 to 16 indicate whether the index is in use (1), or Relinquished (0).

Up to 16 alphanumeric
characters

DA_Pri_In_Use_Offset*

Starting location in Data Array.

1-65535, 0

// Analog Output Map_Descriptor for testing Priority Arrays

Map_Descriptors

Map_Descriptor_Name

, Data_Type

, Object_ID

, Function

, Data_Array_Name

, Data_Array_Index

, Node_Name

, Length

, Relinquish_default

, DA_Pri_Array

, DA_Pri_Array_Offset

, DA_Pri_In_Use

, DA_Pri_In_Use_Offset

CMD_AOP_1

, AO

, 1

, Passive

, DA_OUT

, 0

, N1 11

, 1

, 40.56

, DA_Pri_Array_1

, 0

, DA_Pri_in_use_1

, 0

Appendix A.4.1. Accessing Priority Array information

The Priority Array table and its “In_Use” (or Not Relinquished) state are stored internally to every Map Descriptor , and cannot be accessed directly. The information can
be accessed indirectly by specifying the following Data Arrays which will maintain an exact copy of the Priority Array Table for the Map Descriptor.

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Map_Descriptors

Map_Descriptor_Name

, Data_Type

, Function

, Scan_Interval

, Data_Array_Name

, Data_Array_Index

, Node_Name

, Address

, Length

, Write_Priority

, Service

CMD AO

, AO

, Rdbc

, 1.0s

, DA AO

, 2

, N1 1

, 1

, 1

, 7

, -

CMD AO Rel

, AO

, Wrbx

, 1.0s

, DA AO

, 3

, N1 1

, 1

, 1

, 7

, Relinquish

Map Descriptor CMD AO is a Read
Map Descriptor that will write at
priority 7 if a write-through occurs

Map Descriptor CMD AO Rel is a Write-on-Change
Map Descriptor that will write a NULL at priority 7
(i.e. release Priority Array entry 7) when written to.

Note that the length must be 1.

Appendix A.5. Relinquishing Control of a Point as a Client

It is possible to relinquish control of a point by writing a null to the correct priority level. The following example illustrates how this is done.

Appendix A.6. BACnet State Text Preload

BACnet Multistate Objects have a State_Text property. This property is defined as an array of character strings representing descriptions of all possible states of the
Present_Value. The number of descriptions matches the number of states defined in the Number_Of_States property. The Present_Value, interpreted as an integer,
serves as an index into the array.

When Multistate Objects are configured on a BACnet server it is necessary to define the State_Text property. This section illustrates how to define the State_Text
character strings and how to associate these definitions with Multistate Server Map Descriptors.

The maximum permitted length of any State_Text string is 50 characters.

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//set up a look up table

Offset_Table

Offset_Table_Name

, Table_String

, Table_Index_Value

FIRE_ALRM_TEXT

, SYSTEM READY

, 1

FIRE_ALRM_TEXT

, ALARM

, 2

FIRE_ALRM_TEXT

, MAINTENANCE

, 3

FIRE_ALRM_TEXT

, OFF-LINE

, 4

FIRE_ALRM_TEXT

, IN SERVICE

, 5

FIRE_ALRM_TEXT

, OTHER

, 6 Data_Arrays

Data_Array_Name

, Data_Format

, Data_Array_Length

DA_MI_01

, UINT16

, 100

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Data_Type

, Object_ID

, Length

, State_Text_Array

CMD_MI_01

, DA_MI_01

, 0

, Passive

, N1 11

, MI

, 1

, 1

, Fire_Alrm_Text

Data_Arrays

Data_Array_Name

, Data_Format

, Data_Array_Length

DA_MI_01

, UINT16

, 100

DA_STATE_TXT

, BYTE

, 200

Preloads

Data_Array_Name

, Preload_Data_Value

, Preload_Data_Format

, Preload_Data_Index

DA_STATE_TXT

, MyState1 MyState2 MyState3 MyState4 MyState5 MyState6

, String

, 0

Map_Descriptors

Map_Descriptor_Name

, Data_Type

, Object_ID

, Function

, Data_Array_Name

, Node_Name

, Length

, State_Text_Array

CMD_MI_01

, MI

, 1

, Passive

, DA_MI_01

, N1 11

, 1

, Da_State_Txt

Valid values are 1
to 16.

Appendix A.6.1. Method 1 – Using an Offset/User Table:

Appendix A.6.2. Method 2 – Using a Single Data Array:

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//set up a look up table

Offset_Table

Offset_Table_Name

, Table_String

, Table_Index_Value

, Table_User_Value

FIRE_ALRM_TEXT

, SYSTEM READY

, 1

, 0

FIRE_ALRM_TEXT

, ALARM

, 2

, 1

FIRE_ALRM_TEXT

, MAINTENANCE

, 3

, 2

FIRE_ALRM_TEXT

, OFF-LINE

, 4

, 2

FIRE_ALRM_TEXT

, IN SERVICE

, 5

, 0

FIRE_ALRM_TEXT

, OTHER

, 6

, 2

Appendix A.6.3. Using Intrinsic Reporting for a Multistate Value

To use Intrinsic Reporting for a Multistate value, it is necessary to classify each of the states as either Normal,
Alarm or Trouble. This is done by adding another column to the Offset_Table, called Table_User_Value. Each state
is then classified by inserting one of the following values in its row:

0 = normal
1 = alarm
2 = fault

Note: The state value (Table_Index_Value) is an enumerated value between 1 and 16. Zero is not a valid value, but
since many client side configurations will wake up with values of zero, the BACnet server will treat a value of zero
as a normal value (i.e. not as an alarm or fault value)

Appendix A.7. COV and Intrinsic Reporting

The COV (Change of Value) and Intrinsic Reporting services are two distinct ways in which point values can be
reported to a client workstation as they change, i.e. in an event-driven opposed to a polling method. This can
increase performance dramatically compared to polling method alone. It also reduces network traffic significantly.

For BACnet/MSTP, only MSTP Master Nodes support COV and Intrinsic Reporting

The services are suited to different purposes:

COV is suited to value updates. On analog points the sensitivity can be set using the COV_Increment property.

Only changes larger than the COV_Increment value will be reported.

Intrinsic Reporting is used for alarming. It is implemented via Notification_Class objects, which can receive

subscriptions from client workstations that add themselves to the RecipientList property of a
Notification_Class object. Notifications are done using ConfirmedEventNotification or
UnconfirmedEventNotification. Intrinsic Reporting also allows for alarms to be acknowledged (using the
AcknowledgeAlarm service) and for all subscribed client workstations to be notified of alarm
acknowledgements (using EventNotifications of type ACK_NOTIFICATION)..

Appendix A.7.1. Notes on COV configuration:

COV functionality is not enabled by default for MSTP. The Node_Option parameter can be configured to

enable or disable COV. An example configuration is presented in Appendix A.7.4. Systems using

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BACnet/IP or BACnet/Ethernet to BACnet/MSTP routers may not function reliably if COV functionality is
enabled as the router will make the MSTP device appear as a BACnet/IP or BACnet/Ethernet device, which
could lead the BACnet Workstation to expect unrealistic throughput performance when subscribing to
multiple points. It is recommended only to enable COV functionality on MSTP systems if the Client device
communicates directly via MSTP, or if the user knows that the throughput issue will not arise..

COV functionality (SubscribeCOV service) only applies to the Present_Value and Status_Flags properties of

BACnet Objects - the SubscribeCOVProperty service is not supported by the FieldServer. COV only works
for BACnet Map Descriptors with length set to 1. If length is not specified, then it defaults to 1, so this is
only a problem where length has been specified as greater than 1.

For analog Server Map Descriptors the user may optionally configure a COV_Increment value to adjust the

reporting threshold. If it is not set the COV_Increment defaults to zero.

COV Notifications are generated for all data objects for which a remote client has issued a SubscribeCOV-

Request. The SubscribeCOV-Request regulates whether Notifications are Confirmed or Unconfirmed. The
remote Client may also write the COV_Increment property in order to control the deadband for changes
in analog values. The COV_Increment property can be initialized via the configuration file by setting the
COV_Increment Map Descriptor Property. The value set by the configuration is an initial value that is
loaded on startup. It would be replaced by any new value written by the Client

Appendix A.7.2. Notes on Intrinsic Reporting configuration:

Intrinsic Reporting is managed by Notification Class objects. At least one Notification Class object must be

configured for Intrinsic Reporting to work.

Each Data_Object that is to be monitored by Intrinsic Reporting must be linked to a Notification Class object

via the Notification_Class Map Descriptor Property. For analog points alarm limits must be set up, and for
binary points, the Input_Alarm_State (specifying which binary value (0 or 1) to regard as the Alarm state)
must be set up.

The Notification_Class object contains properties that allow a client workstation to modify rules governing

event reporting, such as event_type, days of week, start and end times etc.

The RecipientLists are not stored permanently but are kept in volatile memory, and subscriptions must be

renewed on system restart.

A permanent static RecipientList may be configured directly on the FieldServer, eliminating the need for a

remote workstation to modify the RecipientList in order to receive Event Notifications. Using this option
makes the RecipientList read-only, i.e. it can then only be modified via the FieldServer config.csv file.
Refer to Appendix A.7.6

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// Change of Value

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Data_Type

, Object_ID

, Ack_Required

SMD_NC_01

, DA_NC_01

, 0

, Passive

, Virtual_Dev_11

, NC

, 01

, -

Map_Descriptors

Map_Descriptor_Name

, Description

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Data_Type

, Object_ID

, Relinquish_Default

, State_Text_Array

, Notification_Class

, High_Alarm

, Low_Alarm

, Input_Alarm_State

, Confirmed

, COV_Increment

SMD_AI_01

, Room Temp

, DA_AI_01

, 0

, Passive

, Virtual_Dev_11

, AI

, 01

, -

, -

, SMD_NC_01

, 100

, 10

, -

, Yes

, 1.0

Nodes Node_Name

, Node_ID

, Protocol

, Node_Option

Virtual_Dev_11

, 11

, BACnet_MSTP

, COV_Disable

// Notification class Objects

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Object_Type

, Object_Instance

, Ack_Required

SMC_NC_01

, DA_NC_01

, 0

, Passive

, Virtual_DEV_11

, NC

, 1

, Yes

SMC_NC_02

, DA_NC_01

, 1

, Passive

, Virtual_DEV_11

, NC

, 2

, No

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Object_Type

, Object_Instance

, Notification_Class

SMD_AI_01

, DA_AI_01

, 0

, Passive

, Virtual_DEV_11

, AI

, 1

, SMC_NC_01

SMD_AO_01

, DA_AO_01

, 0

, Passive

, Virtual_DEV_11

, AO

, 1

, SMC_NC_02

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Object_Type

, Object_Instance

, Notification_Class

SMD_DI_01

, DA_DI_01

, 0

, Passive

, Virtual_DEV_11

, BI

, 1

, SMC_NC_01

SMD_DO_01

, DA_DO_01

, 0

, Passive

, Virtual_DEV_11

, BO

, 1

, SMC_NC_02

Section Title

Map_Descriptors

Column Title

Function

Legal Values

Pri_To_Off_Normal*

Priority for off normal events

Refer to table below

Pri_To_Normal*

Priority for normal events

Refer to table below

Pri_To_Fault*

Priority for faults

Refer to table below

Appendix A.7.3. Map Descriptor Example - COV

Appendix A.7.4. Map Descriptor Example - Enable or Disable COV

Appendix A.7.5. Map Descriptor Example – Intrinsic Reporting

Appendix A.7.6. Setting the Priority of Intrinsic Alarming

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Alarm and Event Priority

Network Priority

00-63

Life Safety Message

64-127

Critical Equipment Message

128-191

Urgent Message

192-255

Normal Message

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Object_Type

, Object_Instance

, Ack_Required

BAC_NC_P1

, DA_NC_01

, 0

, Passive

, Virtual_DEV_11

, NC

, 1

, No

Map_Descriptors

Map_Descriptor_Name

, Data_Array_Name

, Data_Array_Offset

, Function

, Node_Name

, Object_Type

, Object_Instance

, Notification_Class

, Low_Alarm

, High_Alarm

CMD_AI_01

, DA_AI_01

, 10

, Passive

, Virtual_DEV_11

, AI

, 1

, BAC_NC_P1

, 20

, 30

Event_Receiver

Node_Name

, Node_ID

, Protocol

, Process_ID

, Notification_Class_MD

, Adapter

OWS_01

, 10

, BACnet_MSTP

, 12345

, BAC_NC_P1

, N1

OWS_02

, 12

, BACnet_MSTP

, 56789

, BAC_NC_P1

, N1

This is the Notification Class
map descriptor governing the
sending of Event Notifications

This is a BACnet Object that
will report its alarms via the
Notification Class map

This section sets up RecipientList entries for the defined Notification Class map
descriptor. It must appear at the end of the configuration, after all other
references to the Notification Class map descriptor.

A BACnet EventNotification message contains a Priority field indicating the priority of the event being reported. The Priorit y values to be used are configured via the
Priority property of the Notification Class object, using the configuration file parameters Pri_to_offnormal, Pri_to_normal and Pri_to_fault, which determine the priorities
to be used respectively for all to-offnormal, to-normal and to-fault transitions reported via the Notification Class object.

Priority Values should be chosen as follows:

Appendix A.7.7. Map Descriptor Example – Set up a Permanent Static Recipient List

A permanent static RecipientList may be configured directly on the FieldServer, eliminating the need for a remote workstation to modify the Reci pientList in order to
receive Event Notifications. Using this option makes the RecipientList read-only, i.e. it can then only be modified via the FieldServer config.csv file.

This is done by adding an Event_Receiver section to the config.csv. This section must appear after the definition and all other references to the relevant Notification Class
object.

Notification Class Objects are configured as Map Descriptors. Each Notification Class Object maintains a RecipientList Property which may contain multiple destinations.
Each destination is configured as an Event_Receiver after the relevant Notification Class Object has been configured.

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Appendix A.8. Factors Determining the Reliability Property

The Reliability Property of a BACnet object in a Server configuration is determined as follows:

For Multistate Inputs, Outputs and Values, the Reliability property is set to MULTI_STATE_FAULT (9) when the

Present_Value of the object corresponds to an entry in the Fault_Values property of the object, as
configured by the State_Text table in the configuration file.

For all object types, the Reliability property is set to COMMUNICATIONS_FAILURE (12) when the responsible

Server Node is offline.

When neither Condition 1 nor Condition 2 is met, the Reliability property is set to NO_FAULT_DETECTED (0)

Appendix A.9. Specifying ReadPropertyMultiple and WritePropertyMultiple Transactions using Linked

Map Descriptors

The ReadPropertyMultiple (RPM) and WritePropertyMultiple (WPM) BACnet services allow many objects and
attributes to be read and written in a single transaction. Since FieldServer Map Descriptors can only refer to a
single object type and address range, a RPM or WPM transaction can be constructed by linking multiple Map
Descriptors. This is done using the following components:

an active read or write Map Descriptor that defines the behavior of the RPM or WPM transaction via:

Function, e.g. Rdbc, Arcs, Wrbc, Wrbx

 Scan_interval
 Timeout
 Length

 any number of Linked Map Descriptors specifying additional objects and data array locations to be

included in the transaction. Each Linked Map Descriptor is specified with the following settings:

 Linked_Map_Descriptor - this is a reference by name to the active Map Descriptor described above, which

controls the transaction

 Function - Passive_Client
 Length

The number of Linked Map Descriptors is limited by the maximum message length allowed for the BACnet driver in
question. When too many Map Descriptors have been linked a SEGMENTATION_NOT_SUPPORTED error message
will be generated on the first poll attempt. This message will recommend splitting the RPM or WPM transaction
into multiple transactions, e.g.

DRV->BACnet : Linked Map Desc. "CMD_WPM" is too long.
Message Segmentation not supported.
Please split the transaction into multiple Linked Map Descriptors.

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Map_Descriptors

Map_Descriptor_Name

, Object_Type

, Property

, Function

, Data_Array_Name

, Data_Array_Offset

, Node_Name

, Address

, Length

, Write_Priority

, Linked_Map_Descriptor

CMD WPM

, AO

, -

, Wrbc

, DA WPM

, 0

, N1 1

, 1

, 2

, 7

, -

Map_Descriptor_Name

, Object_Type

, Property

, Function

, Data_Array_Name

, Data_Array_Offset

, Node_Name

, Address

, Length

, Write_Priority

, Linked_Map_Descriptor

CMD WPM 1

, AO

, -

, Passive_Client

, DA WPM

, 3

, N1 1

, 4

, 3

, 8

, CMD WPM

CMD WPM 2

, AO

, -

, Passive_Client

, DA WPM

, 7

, N1 1

, 8

, 4

, 10

, CMD WPM

CMD WPM 3

, Device

, Max_Master

, Passive_Client

, DA WPM

, 12

, N1 1

, 1

, 1

, 10

, CMD WPM

CMD WPM 4

, Device

, Max_Info_Frames

, Passive_Client

, DA WPM

, 13

, N1 1

, 1

, 1

, 10

, CMD WPM

CMD WPM 5

, BO

, -

, Passive_Client

, DA BOP

, 0

, N1 1

, 0

, 10

, 11

, CMD WPM

/ ReadPropertyMultiple

Map_Descriptors

Map_Descriptor_Name

, Object_Type

, Property

, Function

, Data_Array_Name

, Data_Array_Index

, Node_Name

, Address

, Length

, Write_Priority

, Linked_Map_Descriptor

CMD RPM

, AO

, -

, Rdbc

, DA RPM

, 9

, N1 1

, 1

, 2

, -

, -

Map_Descriptor_Name

, Object_Type

, Property

, Function

, Data_Array_Name

, Data_Array_Index

, Node_Name

, Address

, Length

, Write_Priority

, Linked_Map_Descriptor

CMD RPM 3

, Device

, Max_master

, Passive_Client

, DA RPM

, 0

, N1 1

, 1

, 1

, -

, CMD RPM

Configure an active read or write Map Descriptor and give it a
unique name. This Map Descriptor will be referred to by all other
Map Descriptors forming part of the multiple property transaction.

Configure a Map Descriptor for each Object and Property. These
are component Map Descriptors forming part of the composite Map
Descriptor CMD WPM above

Set the function to Passive_Client

Set Linked_Map_Descriptor to the
name of the active read or write Map

Example:

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CMD RPM 4

, Device

, Max_Info_Frames

, Passive_Client

, DA RPM

, 1

, N1 1

, 1

, 1

, -

, CMD RPM

CMD RPM 2

, AO

, -

, Passive_Client

, DA RPM

, 2

, N1 1

, 8

, 4

, -

, CMD RPM

CMD RPM 1

, AO

, -

, Passive_Client

, DA RPM

, 6

, N1 1

, 4

, 3

, -

, CMD RPM

These map descriptors form part of the read transaction defined by
Map Descriptor CMD RPM above

Notes:

For the Present_Value property it is permissible to set a Map Descriptor length >1. This will cause a read of the Present_Value property of consecutive BACnet objects of

the type defined by this Map Descriptor

The number of properties that can be read or written at once is limited by the maximum APDU message length.

Message segmentation is not supported.

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Appendix A.10. Update Property Function

The Update_Property parameter may be configured on a BACnet Server Map Descriptor in order to allow a
property other than the Present_Value to be updated in addition to the Present_Value when the Data Array value
changes.

Warning: this is a highly specialized function only to be used under very particular circumstances, by users with a
detailed understanding of BACnet and of what is to be achieved.

Appendix A.10.1. Supported values:

Present_Value (default operation)

Relinquish_Default

Appendix A.10.2. Mode of Operation when used for the Relinquish_Default property:

When the FieldServer starts up, the standard BACnet operation for AO, AV, BO and BV objects is that the
Present_Value of the object is set to the configured Relinquish_Default value. This may not be desirable in
Gateway situations where the BACnet communications module (i.e. the FieldServer) may restart independently of
the controller with the physical outputs.

Instead, it is possible to use the Update_Property setting to initialize the Relinquish_Default property using the
actual field Present_Value read from the Client Side device, so that a restart achieves two important outcomes:

The Client side outputs are not modified

The current state of the Client Side output can be read via the Relinquish_Default property. This is especially

useful since the BACnet specification makes no provision for Feedback_Values on analog objects

Depending on the function of the Client Side Map Descriptor there are slightly differing behaviors.

RDBC - If the Client Side Map Descriptor is configured with the RDBC function, then every read operation will

cause the Relinquish_Default property on the BACnet Server side to be updated to match the new
Present_Value.

ARS (recommended) - If the Client Side Map Descriptor is configured with the ARS function, then only the

startup read operation (which occurs on FieldServer restart, or if the Client Side Node has gone offline and
is being recovered) will cause theRelinquish_Default property on the BACnet Server side to be updated to
match the new Present_Value.

Restrictions:

This function cannot yet be used in conjunction with Complex data types.

Appendix A.11. Disabling selected BACnet services

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Nodes

Node_Name

, Node_ID

, Protocol

, Disabled_Services

NN 01

, 1

, Bacnet_IP

, WPM

Nodes

Node_Name

, Node_ID

, Protocol

, Disabled_Services

NN 02

, 2

, Bacnet_IP

, COV

Nodes

Node_Name

, Node_ID

, Protocol

, Disabled_Services

NN 03

, 3

, Bacnet_IP

, WPM COV

Certain BACnet services can be disabled on a BACnet Server Node when specific requirements necessitate this:

COV - certain BACnet MS/TP routers struggle to keep up with the bidirectional traffic that can result from

many COVSubscribe requests in quick succession. In this case, better results might be obtained by turning
COV off.

WritePropertyMultiple (WPM) - when the user requires writes to the BACnet Server to be acknowledged only

once Client Side writes have succeeded, WPM is turned off.

These services can be disabled individually or together by listing them under the optional "Disabled_Services"
parameter of the Node configuration section, separated by a space if more than one function is listed. When a
service has been disabled, the BACnet Server Node will reject a corresponding service request with the reason
“Unrecognized Service”.

The following values may be used under Disabled_Services:

WPM (disable support for the WritePropertyMultiple service)
COV (disable support for the SubscribeCOV service)

Examples:

1. Disable WPM only

2. Disable COV only

3. Disable WPM and COV

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vendor_name = Sierra Monitor Corporation

vendor_id = 37

Appendix A.12. Using a .ini file to set the Vendor_ID and Vendor_Name of the Device Object

The vendor.ini file can be used to change the BACnet Vendor Name and Vendor ID if desired. A file with the

following format must be created and downloaded to the FieldServer using the Ruinet “Download Configuration”

command.

Please note that changing the Vendor_ID and Vendor_Name on FieldServer BTL approved products may disqualify

them from the BTL approval.

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Appendix B. Troubleshooting

Appendix B.1. Debugging a BACnet connection

If duplicate Object_Instances are configured in the FieldServer, the second call of the Instance will overwrite

the first one. This may cause a BACnet Object to be “lost.”

If the Node Name configured on the BACnet Server Side of the configuration is not being indicated as the

Device Name on the BACnet SCADA system, then the FieldServer is not communicating with the SCADA
system. If the Device Object's name is being indicated, but the Present_Value shows question marks,
then it is likely that the Client side of the FieldServer is not communicating.

Extra memory is required to store Map Descriptors that have the active/inactive text parameters specified. If

the defaults are appropriate, do not specify these parameters. This will save memory and allow more
Map Descriptors to be created

When a BACnet_MSTP connection is configured as a server, it is better to use connection_type

MSTP_Slave_Node. The only time when a server connection must be a Master_Node is when alarming
has been established on the FieldServer.

When a FieldServer/ProtoCessor is configured to support MSTP virtual server nodes the firmware achieves this

by implementing a virtual router and thus a network number is required so that it can expose its nodes to
external devices as belonging to a specific network. (The default is network 5 if not specified). This
network number is defined on the bridge descriptor as Network_Number. It must be unique for a site.
Refer also to Appendix A.2.

Appendix B.2. COV Configuration

COV has to be enabled if required for MSTP. Refer to Appendix A.7 for more information.

COV only works for BACnet Map Descriptors with length set to 1. If length is not specified, then it defaults to 1,

so this is only a problem where length has been specified as greater than 1.

Appendix B.3. BACnet Specific Statistics

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Stat

Description

Resolution

Link Control

A “who-is” link control message was
send or received.

It is normal to receive a few link control
messages. If the number is higher than the
transmit/receive messages, however, there may
be a problem with lost communications..

Unsupported
Properties

A request for an unsupported property
was received

This is not an error. BACnet clients often poll all
properties of a particular object to determine
which properties are supported.

Segmentation
Not Supported

Data was requested but the response
would have exceeded the maximum size
of the APDU and could not be sent using
an un-segmented message.

This is not an error - the BACnet client will use a
different method to read data from the
FieldServer.

Sequence Error

Invoke ID of a reply did not match the
Invoke ID of the poll.

You should not see this message. It normally
indicates a configuration error.

Write Access
Denied

A write to an object was denied.

This typically happens when trying to write to an
Input Object that is not Out-Of-Service. It is not
possible to write to Input Objects.

Exception Errors

A BACnet Service was denied because it
is not supported

Consult the PIC statement to determine what
services are supported.

Message
Description

Cause

Suggested Resolution

Bacnet IP DLL
Temporarily out of
receive buffers

The FieldServer was flooded with more BACnet IP packets
than it could handle. This typically occurs when a
workstation discovers a large network resulting in many
Who-Is and I-Am broadcasts. The FieldServer will recover
from this, but some timeout errors could result.

Take action only if the error
is continuous in which case
the network load must be
analyzed and corrected.
Device

0

Object

1

Property

2

Resources

3

Security

4

Services

5

Appendix B.4. BACnet Specific Error Messages

Appendix B.5. BACnet Error Response Decoding

BACnet reports errors in the following format:

T02> 10/22 02:57 HEXDUMP : ERROR_PDU
T02> 10/22 02:57 0x19d2d 50 97 0f 91 02 91 2a
T02> 10/22 02:57 BACnet -> Unexpected ERROR_PDU : err_class=2 err_code=42

These can be decoded using the following tables:

Appendix B.5.1. BACnet Error CLASS

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Other

0

Authentication failed

1

Configuration in progress

2

Device busy

3

Dynamic creation not supported

4

File access denied

5

Incompatible security levels

6

Inconsistent parameters

7

Inconsistent selection criterion

8

Invalid data type

9

Invalid file access method

10

Invalid file start position

11

Invalid operator name

12

Invalid parameter data type

13

Invalid time stamp

14

Key generation error

15

Missing required parameter

16

No objects of specified type

17

No space for object

18

No space to add list element

19

No space to write property

20

No vt sessions available

21

Property is not a list

22

Object deletion not permitted

23

Object identifier already exists

24

Operational problem

25

Password failure

26

Read access denied

27

Security not supported

28

Service request denied

29

Timeout

30

Unknown object

31

Unknown property

32

Unknown vt class

34

Unknown vt session

35

Unsupported object type

36

Value out of range

37

Vt session already closed

38

Vt session termination failure

39

Write access denied

40

Character set not supported

41

Invalid array index

42

Invalid index

42

Appendix B.5.2. BACnet Error CODES for Error Class OBJECT

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Appendix B.6. Rediscovering Offline Devices

The BACnet driver handles APDU retries internally and uses its own parameters, not the kernel parameters. The
kernel timeout and retry values should be left to default.

The following parameters can be configured on the Client Node:

APDU_Timeout - default value is 10s

APDU_Retries - default value is 3

The FieldServer will only send requests to the remote device once it has discovered it using the Who -Is / I-Am
process.

If a device does not respond and the APDU_Retries have been used up, the driver will revert to trying to discover
the device using Who-Is requests.

Note that there is also a background process of rediscovering devices independently of the polling process. This
occurs every 10 minutes.

Appendix B.7. Timeout Errors

NL TX Abort errors mean that the BACnet network layer was unable to transmit queued messages in time and gave
up on them. Outgoing packets are programmed with a 10 second timeout. . If packets have not been transmitted
within this 10 second window, they are discarded and an error is recorded.

Timeout errors may be experienced on start-up if the network is not yet fully synchronised or if there are a large
number of nodes on the network. The FieldServer can only transmit the I-Ams a few at a time, and only when it
receives the MSTP token.

It might help to give the MSTP network some time to settle before attempting a discovery.

It may be advisable to discover the Nodes in a number of smaller Node ID ranges (say 10 at a time). The Node_ID’s
can be established from the configuration.

Appendix B.8. PDU limit reached errors

A PDU limit reached error is returned when a device runs out of buffers for storing incoming or outgoing messages
(PDU = protocol data unit). A possible scenario is when a large number of server nodes is configured and one or
more global Who-Is requests is received. The FieldServer will then need to transmit a response for each one, but if
the MSTP network is busy it might not get enough airtime to send them all out. Another possibility is a buildup of
unsent COV or Event Notifications.

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Appendix C. Vendor Information

Appendix C.1. McQuay

McQuay Units are shipped with a default Device instance of the last 6 digits of the McQuay Serial number.

Appendix C.2. Trane

When new points are added to the FieldServer it is important to restart the Summit Workstation or BCU, otherwise
these new points may not be seen by the FieldServer.

Disconnect the FieldServer from the BACnet network when transferring images to the BCU.

Appendix C.3. Liebert

Polling BACnet addresses that are not configured for Liebert systems may cause the connection to fail in older
versions of Liebert. Please contact your Liebert supplier for more information.

Appendix C.4. Automated Logic Corporation.

When an ALC module is powered up, and it does not detect valid BACnet/MSTP traffic on its MSTP port, then the
module goes into a terminal mode and MSTP communications will not be intitiated.

When connecting the FieldServer to an ALC BACnet/MSTP module, always start the FieldServer first. Wait until the
RUN Led is flashing on the FieldServer before powering up the MSTP module.

Appendix C.5. Honeywell EBI

Honeywell EBI cannot process EventNotifications with ACK_Required set to 1. The ACK_Required property of
Notification Class Map Descriptors configured for use with EBI must therefore be set to 0.

Appendix C.6. Using Cimetrics Explorer

Cimetrics Explorer needs to be configured to use either BACnet Ethernet or BACnet IP. This is not a setting in the
actual Cimetrics BACnet Explorer, but is done in the Cimetrics BACstac Protocol that can be found in the Local Area
Connection Properties as shown below:

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Check the properties of this protocol to see what BACnet protocol is set on the Cimetrics Explorer.

To change the protocol, remove the current one and add a new one as shown below.

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AI

ANALOG_INPUT

AO

ANALOG_OUTPUT

AV

ANALOG_VALUE

BI

BINARY_INPUT

BO

BINARY_OUTPUT

BV

BINARY_VALUE

MI

MULTI_STATE_INPUT

MO

MULTI_STATE_OUTPUT

MV

MULTI_STATE_VALUE

NC

NOTIFICATION_CLASS_OBJECT

Legal Value

Description

Object_Identifier

This property is a numeric code that is used to identify the object. It is unique within the
BACnet Device that maintains it.

Object_List

Relevant to Device Object Type. This property is a BACnetARRAY of Object_Identifiers, one
Object_Identifier for each object within the device that is accessible through BACnet
services. An Object_Identifier is composed of Object Type and Object Instance and must
be unique within a BACnet Device, e.g. Object Type = Analog Input, Object Instance = 3

Present_Value

This property contains the present value of the Input / Output / Value

Object_Name

Character string providing the name of a BACnet object. The set of characters used in the
Object_Name is restricted to printable characters. The Object_Name is determined by the
Map_Descriptor_Name.

Description

Character string describing a BACnet object. This can be defined by the user to give
additional detail about the Object.

Out_of_Service

The Out_Of_Service property, of type BOOLEAN, is an indication whether (TRUE) or not
(FALSE) the physical input that the object represents is not in service. This means that the
Present_Value property is decoupled from the physical input and will not track changes to
the physical input when the value of Out_Of_Service is TRUE. In addition, the Reliability
property and the corresponding state of the FAULT flag of the Status_Flags property shall
be decoupled from the physical input when Out_Of_Service is TRUE. While the
Out_Of_Service property is TRUE, the Present_Value and Reliability properties may be
changed to any value as a means of simulating specific fixed conditions or for testing
purposes. Other functions that depend on the state of the Present_Value or Reliability
properties shall respond to changes made to these properties while Out_Of_Service is
TRUE, as if those changes had occurred in the physical input.

Event_State

The Event_State property, of type BACnetEventState, is included in order to provide a way
to determine if this object has an active event state associated with it. If the object
supports intrinsic reporting, then the Event_State property shall indicate the event state of
the object. If the object does not support intrinsic reporting, then the value of this property
shall be NORMAL. Other values: FAULT, OFF-NORMAL, HIGH-LIMIT, LOW-LIMIT, LIFE­SAFETY-ALARM

Units

This property contains the units associated with the Present_Value property.

Appendix D. Reference

Appendix D.1. Object_Type Legal Values – Abbreviation Descriptions

Appendix D.2. Property Legal Values

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Legal Value

Description

Reliability

The Reliability property, of type BACnetReliability, provides an indication of whether the
Present_Value or the operation of the physical input in question is "reliable" as far as the
BACnet Device or operator can determine and, if not, why. The following values are
supported:
NO_FAULT_DETECTED, UNRELIABLE_OTHER

Priority_Array

This property relates to Output and Value Object Types and is a read only array that
contains prioritized commands or NULLs in the order of decreasing priority. The highest
priority (lowest array index) with a non-NULL value is the active command.

State_Text

Relevant to Multistate Object Types: This property is a BACnetARRAY of character strings
representing descriptions of all possible states of the Present_Value. The number of
descriptions matches the number of states defined in the Number_Of_States property. The
Present_Value, interpreted as an integer, serves as an index into the array.

Number_Of_States

Relevant to Multistate Object Types: this property sets the total number of states for which
descriptions will be returned as defined under the State_Text property. The number of
states will be determined automatically by the largest state number used when configuring
the Offset Table (Refer to Appendix A.5).

Max_Master

Relevant to BACnet MS/TP Device Object Type: The Max_Master property, of type
Unsigned, shall be present if the device is a master node on an MS/TP network. The value
of Max_Master specifies the highest possible address for master nodes and shall be less
than or equal to 127. If the Max_Master property is not writeable via BACnet services, its
value shall be 127.

Max_Info_Frames

Relevant to BACnet MS/TP Device Object Type: The Max_Info_Frames property, of type
Unsigned, shall be present if the device is a node on an MS/TP network. The value of
Max_Info_Frames specifies the maximum number of information frames the node may
send before it must pass the token. If Max_Info_Frames is not writable or otherwise user
configurable, its value shall be 1.

Active_Text

Relevant to Binary Object Types: This property, of type CharacterString, characterizes the
intended effect of the ACTIVE state of the Present_Value property from the human
operator's viewpoint. The content of this string is a local matter, but it is intended to
represent a human-readable description of the ACTIVE state. For example, if the physical
input is a switch contact, then the Active_Text property might be assigned a value such as
"Fan 1 On".

Inactive_Text

This property, of type CharacterString, characterizes the intended effect of the INACTIVE
state of the Present_Value property from the human operator's viewpoint. The content of
this string is a local matter, but it is intended to represent a human-readable description of
the INACTIVE state. For example, if the physical input is connected to a switch contact, then
the Inactive_Text property might be assigned a value such as "Fan 1 Off".

Description

A character string giving more information about the Object associated with the
Present_Value property.

Firmware_revision

The firmware revision of the application.

Relinquish_Default

This property is the default value to be used for the Present_Value property when all
command priority values in the Priority_Array property have a NULL value.

Event_Enable

The Event_Enable property is supported, but to save memory it is only instantiated it if a
point is configured for alarming, i.e. if it is set up with a reference to a Notification Class
Map Descriptor.

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.FieldServer.com

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Unit

Variation 1

Variation 2

Variation 3

Area

square-centimeters

square-feet

square-inches

square-meters

Currency

Currency1

Currency2

Currency3

Currency4

Currency5

Currency6

Currency7

Currency8

Currency9

Currency10

Electrical

milliamperes

milliamps

Amperes

Amps

A

amperes-per-meter

amperes-per-square-meter

ampere-square-meters

farads

henrys

ohms

ohm-meters

kilohms

megohms

micro_siemens

siemens

siemens-per-meter

TESLAS

Volts

Voltage

Voltage

Millivolts

kilovolts

Appendix D.3. Units

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.FieldServer.com

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Unit

Variation 1

Variation 2

Variation 3

megavolts

Volt-Amperes

Volt-Amps

VA

kilovolt-amperes

kilovolt-amps

KVA

megavolt-amperes

megavolt-amps

volt-amperes-reactive

VAR

kilovolt-amperes-reactive

KVAR

Megavolt-amperes-reactive

MVAR

volts-per-degree-kelvin

volts-per-meter

degrees-phase

Power-Factor

PF

WEBERS

Energy

Joules

kilojoules

kilojoules-per-kilogram

megajoules

watt-hours

Wh

kilowatt-hours

KWh

Megawatt-hours

MWh

BTUs

Kilo-BTUs

Mega-BTUs

Therms

ton-hours

kilovolt-amperes--hours

kilovolt-amperes-reactive-hours

megavolt-amperes--hours

megavolt-amperes-reactive-hours

Enthalpy

joules-per-kilogram-dry-air

kilojoules-per-kilogram-dry-air

megajoules-per-kilogram-dry-air

btus-per-pound-dry-air

btus-per-pound

Entropy

joules-per-degree-kelvin

kilojoules-per-degree-kelvin

megajoules-per-degree-kelvin

joules-per-kilogram-degree-kelvin

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.FieldServer.com

Tel: [phone] Fax: [phone] Toll Free: [phone] email: [e-mail]

FS-8700-73 BACnet MSTP Driver Manual Page 45 of 48

Unit

Variation 1

Variation 2

Variation 3

Force

newton

Frequency

cycles-per-hour

cycles-per-minute

Hertz

Hz

Kilohertz

KHz

Megahertz

MHz

Per-hour

Humidity

grams-water-per-kg-dry-air

percent-relative-humidity

% RH; %RH

Percent RH;

PercentRH

Length

millimeters

centimeters

meters

inches

feet

Light

candelas

candelas-per-square-meter

watts-per-square-foot

watts-per-square-meter

lumens

luxes

foot-candles

Mass

Kilograms

Kg

Pounds-mass

Tons

Mass Flow

grams-per-second

grams-per-minute

kilograms-per-second

kilograms-per-minute

kilograms-per-hour

pounds-mass-per-second

pounds-mass-per-minute

pounds-mass-per-hour

Power

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.FieldServer.com

Tel: [phone] Fax: [phone] Toll Free: [phone] email: [e-mail]

FS-8700-73 BACnet MSTP Driver Manual Page 46 of 48

Unit

Variation 1

Variation 2

Variation 3

Milliwatts

Watts

W

kilowatts

KW

megawatts

MW

BTUs-per-hour

kilo-btus-per-hour

Horsepower

HP

Tons-refrigeration

Pressure

Pascals

hectopascals

Kilopascals

KPa

millibars

Bars

pounds-force-per-square-inch

PSI

pounds-force-per-sq-inch

centimeters-of-water

inches-of-water

millimeters-of-mercury

centimeters-of-mercury

inches-of-mercury

Temperature

Degrees-Celsius

Deg-C

Deg_C

Degrees-Kelvin

Deg-K

Deg_K

degrees-Kelvin-per-hour

degrees-Kelvin-per-minute

Degrees-Fahrenheit

Deg-F

Deg_F

Degrees-days-Celsius

Degrees-days-Fahrenheit

delta-degrees-Fahrenheit

delta-degrees-Kelvin

Time

years

months

weeks

days

hours

minutes

seconds

Secs

S

hundredths-seconds

milliseconds

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.FieldServer.com

Tel: [phone] Fax: [phone] Toll Free: [phone] email: [e-mail]

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Unit

Variation 1

Variation 2

Variation 3

Torque

newton-meters

Velocity

millimeters-per-second

millimeters-per-minute

meters-per-second

meters-per-minute

meters-per-hour

kilometers-per-hour

feet-per-second

feet-per-minute

miles-per-hour

Volume

cubic-feet

cubic-meters

imperial-gallons

liters US-gallons

Gallons

Volumetric Flow

cubic-feet-per-seconds

cubic-feet-per-minute

cubic-feet-per-hour

cubic-meters-per-seconds

cubic-meters-per-minute

cubic-meters-per-hour

imperial-gallons-per-min

liters-per-second

liters-per-minute

liters-per-hour

US-Gallons-per-hour

US-Gallons-per-minute

GPM

Others

degrees-angular

degrees-celsius-per-hour

degrees-celsius-per-minute

degrees-fahrenheit-per-hour

degrees-fahrenheit-per-minute

joule-seconds

kilogram-per-cubic-meter

kilowatt-hour-per-square-meter

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.FieldServer.com

Tel: [phone] Fax: [phone] Toll Free: [phone] email: [e-mail]

FS-8700-73 BACnet MSTP Driver Manual Page 48 of 48

Unit

Variation 1

Variation 2

Variation 3

kilowatt-hour-per-square-foot

megajoules-per-square-meter

megajoules-per-square-foot

No-Units

No Units

No_Units

None

newton-seconds

newtons-per-meter

parts-per-million

parts-per-billion

Percent

percent-obscuration-per-foot

percent-obscuration-per-meter

percent-per-second

per-minute

per-second

psi-per-degrees-fahrenheit

radians

revolutions-per-minute

square-meters-per-newton

watts-per-meter-per-degree-kelvin

watts-per-square-meter-degrees-kelvin

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.FieldServer.com

Tel: [phone] Fax: [phone] Toll Free: [phone] email: [e-mail]