FieldServer FS-8700-16 User Manual

Driver Version:

1.15

-

Driver Manual

(Supplement to the FieldServer Instruction Manual)

FS-8700-16 Bacnet PTP - Serial

APPLICABILITY & EFFECTIVITY

Effective for all systems manufactured after September 2008

Document Revision: 4

FS-8700-16 BACnet PTP Serial Driver Manual Table of Contents

TABLE OF CONTENTS

1.

BACNET DESCRIPTION................................................................................................................... 3

2.

DRIVER SCOPE OF SUPPLY........................................................................................................... 3

2.1.

Supplied by FieldServer Technologies for this Driver ................................................. 3

2.2.

Provided by supplier of 3rd party equipment ............................................................... 3

3.

HARDWARE CONNECTIONS ..........................................................................................................4

4.

CONFIGURING THE FIELDSERVER AS A BACNET CLIENT .......................................................5

4.1.

Data Arrays/ Descriptors ............................................................................................ 5

4.2.

Setting the FieldServer Node_ID and Network Number ............................................. 5

4.3.

Client Side Connection Descriptions .......................................................................... 6

4.4.

Client Side Node Descriptors ..................................................................................... 6

4.5.

Client Side Map Descriptors....................................................................................... 7

4.5.1. FieldServer Related Map Descriptor Parameters.................................................... 7

4.5.2. Driver Related Map Descriptor Parameters............................................................. 7

4.5.3. Timing Parameters ................................................................................................. 7

4.5.4. Map Descriptor Example......................................................................................... 8

5.

CONFIGURING THE FIELDSERVER AS A BACNET SERVER ..................................................... 9

5.1.

Driver Specific FieldServer Parameters ..................................................................... 9

5.2.

Server Side Connection Descriptions........................................................................10

5.3.

Server Side Node Descriptors...................................................................................10

5.4.

Server Side Map Descriptors ....................................................................................11

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

5.4.2. Driver Specific Map Descriptor Parameters ...........................................................11

5.4.3. Map Descriptor Example........................................................................................12

APPENDIX A. DRIVER NOTES ............................................................................................................13

Appendix A.1. Data_Type Legal Values – Abbreviation Descriptions..................................13

APPENDIX B. ADVANCED TOPICS .................................................................................................... 14

Appendix B.1. BACnet Object Names.................................................................................14

Appendix B.2. BACnet Priority Arrays .................................................................................14

Appendix B.3. Limitations of the BACnet READ_PROPERTY_MULTIPLE service. ............14

Appendix B.4. Network number...........................................................................................15

Appendix B.5. BACnet State Text Preload ..........................................................................16

APPENDIX C. TROUBLESHOOTING TIPS..........................................................................................17

Appendix C.1. Debugging a BACnet connection – Hints and Tips.......................................17

Appendix C.2. BACnet Specific Statistics............................................................................17

APPENDIX D. UNITS............................................................................................................................. 18

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FS-8700-16 BACnet PTP Serial Driver Manual Page 3 of 20

1. BACnet Description

The BACnet PTP driver allows the FieldServer to transfer data to and from devices using the BACnet
protocol over a serial RS-232 physical layer. The FieldServer can emulate either a Server or Client.

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

2. Driver Scope of Supply

2.1. Supplied by FieldServer Technologies for this Driver

FieldServer Technologies
PART #

Description

FS-8917-02 RJ45 to DB9F Connector adapter
FS-8917-03 Connector adapter – DB9M to DCE, RTS/CTS, DSR/DTR
FS-8700-16 Driver Manual.

2.2. Provided by supplier of 3rd party equipment

PART # DESCRIPTION

Building control unit (BCU)
BACnet client such as a workstation

1

2

1

If FieldServer used as BACnet Client.

2

If FieldServer used as BACnet Server

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FS-8700-16 BACnet PTP Serial Driver Manual Page 4 of 20

06

3. Hardware Connections

It is possible to connect a BACnet device to any of the eight RS-2323 ports. These ports just need to be
configured for BACnet in the configuration file.

Configure the PLC (or BCU) according to manufacturer’s instructions

8917-03 WIRE LIST

DB9M

FUNCTION FROM TO COLOUR

RX RJ45-01 DB9M-02 GREY

CTS RJ45-02 DB9M08 BROWN
DSR RJ45-03 DB9M-06 YELLOW
GND RJ45-04 DB9M-05 GREEN
GND RJ45-05 RED
DTR RJ45-06 DB9M-04 BLACK

RTS RJ45-07 DB9M-07 ORANGE

TX RJ45-08 DB9M-03 BLUE

DB9F

RJ45 Connector

EIA232

RJ45 to

Connector

Note that connection to a Trane BCU requires the 8917-02 option.

8917-02 WIRE LIST

FUNCTION FROM TO COLOUR

Rx RJ45-01 DB9F-03 WHITE

GND RJ45-04 DB9F-05 GREEN

Tx RJ45-08 DB9F-02 BLUE

(408)-262-2299

FIELDSERVER

BACNET PTP

CONNECTION DIAGRAM

BASE NAME:
FILE NAME:

DATE: 7/30/
BY: MC

3

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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FS-8700-16 BACnet PTP Serial Driver Manual Page 5 of 20

4. Configuring the FieldServer as a BACnet Client

For a detailed discussion on FieldServer configuration, please refer to the FieldServer Instruction 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 Server.

4.1. Data Arrays/ Descriptors

The configuration file tells the FieldServer about its interfaces, and the routing of data required. In
order to enable the FieldServer for BACnet 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.

Section Title

Data_Arrays

Column Title Function Legal Values

Data_Array_Name Provide name for Data Array

Data_Format Provides data format

Data_Array_Length Number of Data Objects 1-10,000

Example

// Data Arrays

Data_Arrays
Data_Array_Name, Data_Format, Data_Array_Length
DA_AI_01, Float, 200
DA_AO_01, Float, 200
DA_DI_01, Bit, 200
DA_DO_01, Bit, 200

Up to 15 alphanumeric
characters
Float, Bit, Uint16, Uint32,
Sint16, Sint32, Packed_Bit,
Byte, Packed_Byte,
Swapped_Byte

4.2. Setting the FieldServer Node_ID and Network Number

Section Title

FieldServer

Column Title Function Legal Values

System_Node_ID Configure Node_ID of FieldServer 1-255
Network_Number BACnet Network Number

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1-65535, 5

FS-8700-16 BACnet PTP Serial Driver Manual Page 6 of 20

Example

// FieldServer

FieldServer
Title, System_Node_ID, Network_Number
BACnet_PTP, 11, 2

4.3. Client Side Connection Descriptions

Section Title

Connections

Column

Title

Port Port Name P1-P84

Baud* Specify baud rate

Parity* Specify parity
Data_Bits* Specify data bits
Stop_Bits* Specify stop bits

Protocol

Example

// Client Side Connections

Connections
Port, Baud, Parity, Data_Bits, Stop_Bits, Protocol
P8, 9600, Even, 7, 1, BACnet_PTP

Function Legal Values

110; 300; 600; 1200; 2400; 4800; 9600; 19200; 38400;
57600; 115000
Odd, Even, None
7, 8

1,2
Specify Protocol
Used

BACnet_PTP

4.4. Client Side Node Descriptors

Section Title

Nodes

Column Title Function Legal Values

Node_Name Provide name for node Up to 32 alphanumeric characters
Node_ID Node ID of physical server node (the BCU) 1 - 4194303
Protocol Specify protocol used BACnet_PTP
Port Specify port P1-P8

Example

// Client Side Nodes

Nodes
Node_Name, Node_ID, Protocol, Port
BCU_1, 1, BACnet_PTP, P8

4

Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction

manual for details of the ports available on specific hardware.

5

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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5

FS-8700-16 BACnet PTP Serial Driver Manual Page 7 of 20

4.5. Client Side Map Descriptors

4.5.1. FieldServer Related Map Descriptor Parameters

Column Title Function Legal Values

Map_Descriptor_Name

Data_Array_Name

Data_Array_Offset

Function

Name of this Map
Descriptor
Name of Data Array
where data is to be stored
in the FieldServer
Starting location in Data
Array
Function of Client Map
Descriptor

Up to 32 alphanumeric
characters

One of the Data Array names
from “Data Array” section above

0 to maximum specified in
“Data Array” section above

RDBC, WRBC, WRBX

4.5.2. Driver Related Map Descriptor Parameters

Column Title Function Legal Values

One of the node names

Node_Name Name of Node to fetch data from

Data_Type Data type in FieldServer

Object_Instance Address of object 0, 1, 2, 3, …
Property* The BACnet property to be read

Data_Array_Low_Scale*

Data_Array_High_Scale*

Node_Low_Scale*
Node_High_Scale*

Length*

Write_Priority*

Custom_Type

Custom_Prop

Scaling zero in Data Array

Scaling max in Data Array

Scaling zero in Connected Node
Scaling max in Connected Node
Number of objects that will be polled
using the READ_PROPERTY_
MULTIPLE service. See Appendix B.3
Allows the driver to specify the write
priority used to write an output. See
also Appendix B.2
This over-writes the Data_Type with a
numerical value for the Data_Type.
e.g. Analog Value = 2
This over-writes the Property with a
numerical value for the property. e.g.
Present Value = 85

specified in “Client Node
Descriptor” above
AI, AO, AV, BI, BV, MI,
MO, MV6

Present_Value

-32767 to 32767, 0

-32767 to 32767, 100

-32767 to 32767, 0

-32767 to 32767, 100

2-29, 1

1..16, 16

1..1023

1..4194303

4.5.3. Timing Parameters

Column Title Function Legal Values

Scan_Interval* Seconds per scan

6

Refer to Appendix A.1 for further information.

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0-32000, 2

Tel: [phone] Fax: [phone] Toll Free: 888-509-1970 email: [e-mail]

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4.5.4. Map Descriptor Example

FS-8700-16 BACnet PTP Serial Driver Manual Page 8 of 20

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, BCU_1, AI, 1, Present_Value, 20.000s

CMD_AI_02, DA_AI_01, 1, RDBC, BCU_1, AI, 2, Present_Value, 20.000s

CMD_AI_03, DA_AI_01, 2, RDBC, BCU_1, AI, 3, Present_Value, 20.000s

CMD_AO_01, DA_AO_01, 0, RDBC, BCU_1, AO, 1, Present_Value, 30.000s

CMD_AO_02, DA_AO_01, 1, RDBC, BCU_1, AO, 2, Present_Value, 30.000s

CMD_AO_03, DA_AO_01, 2, RDBC, BCU_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, BCU_1, DI, 1, Present_Value, 15.000s

CMD_DI_02, DA_DI_01, 1, RDBC, BCU_1, DI, 2, Present_Value, 15.000s

CMD_DI_03, DA_DI_01, 2, RDBC, BCU_1, DI, 3, Present_Value, 15.000s

CMD_DO_01, DA_DO_01, 0, RDBC, BCU_1, DO, 1, Present_Value, 30.000s

CMD_DO_02, DA_DO_01, 1, RDBC, BCU_1, DO, 2, Present_Value, 30.000s

// Client Side Map Descriptors

CMD_DO_03, DA_DO_01, 2, RDBC, BCU_1, DO, 3, Present_Value, 30.000s

FS-8700-16 BACnet PTP Serial Driver Manual Page 9 of 20

5. Configuring the FieldServer as a BACnet Server

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 Client.

The configuration file tells the FieldServer about its interfaces, and the routing of data required. In order to
enable the FieldServer for BACnet 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.

5.1. Driver Specific FieldServer Parameters

Section Title

Bridge

Column Title Function Legal Values

Title FieldServer name Text

Specify a unique network number

Network_number*

Example

// FieldServer Driver specific parameters
Bridge
Title, Network_number
Bacnet Server, 6

if there are multiple virtual Server
nodes.

1-65535

5

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FS-8700-16 BACnet PTP Serial Driver Manual Page 10 of 20

5.2. Server Side Connection Descriptions

Section Title

Connections

Column Title Function Legal Values

Port Port name P1-P87

110; 300; 600; 1200;

Baud* Specify baud rate

2400; 4800; 9600; 19200;

38400; 57600; 115000
Parity* Specify parity Odd, Even, None
Data_Bits* Specify data bits
Stop_Bits* Specify stop bits

7, 8

1,2
Protocol Specify Protocol Used BACnet_PTP

Example

// Server Side Connections

Connections
Port, Baud, Parity, Data_Bits, Stop_Bits, Protocol
P1, 9600, Even, 7, 1, BACnet_PTP

5.3. Server Side Node Descriptors

Section Title

Nodes

Column Title

Node_Name8 Provide name for node

Node_ID

BACnet station address of physical Server
node

Function Legal Values

Up to 32 alphanumeric
characters

1 - 4194303

Protocol Specify protocol used BACnet_PTP

Example

// Server Side Nodes

Nodes
Node_Name, Node_ID, Protocol

Virtual_BCU_11, 11, BACnet_PTP

7

Not all ports shown are necessarily supported by the hardware. Consult the appropriate Instruction

manual for details of the ports available on specific hardware.

8

When using the Trane Tracer Summit Workstation System, this name will appear as the object name

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FS-8700-16 BACnet PTP Serial Driver Manual Page 11 of 20

5.4. Server Side Map Descriptors

5.4.1. FieldServer Specific Map Descriptor Parameters

Column Title Function Legal Values

Map_Descriptor_Name Name of this Map Descriptor

Name of Data Array where

Data_Array_Name

Data_Array_Offset Starting location in Data Array

Function

data is to be stored in the
FieldServer

Function of Server Map
Descriptor

Up to 32 alphanumeric
characters.

One of the Data Array names
from “Data Array” section

0 to data_array_length-1 as
specified in “Data_Array”
section

Server

5.4.2. Driver Specific Map Descriptor Parameters

Column Title Function Legal Values

One of the node names

Node_Name Name of FieldServer Node

Data_Type Data type in BCU

Object_Instance Address of the object 0, 1, 2, 3, …
Units The object units
Data_Array_Low_Scale* Scaling zero in Data Array
Data_Array_High_Scale* Scaling max in Data Array

Node_Low_Scale*

Node_High_Scale*

Active Text

Inactive Text

Relinquish Default

Custom_Type

Custom_Prop

Scaling zero in Connected
Node
Scaling max in Connected
Node
Specify the Active Text
property of the Object
Specify the Inactive Text
property of the
Specify the startup
Relinquish_Default Property
value for this Object
This over-writes the
Data_Type with a numerical
value for the Data_Type. e.g.
Analog Value = 2
This over-writes the Property
with a numerical value for the
property. e.g. Present Value =
85

specified in “Server Node
Descriptor” above
AI, AO, AV, BI, BV, MI, MO,
MV9

See Appendix D

-32767 to 32767, 0

-32767 to 32767, 100

-32767 to 32767, 0

-32767 to 32767, 100

Any legal BACnet ASCII string

Any legal BACnet ASCII string

Any legal BACnet ASCII string

1..1023

1..4194303

9

Refer to Appendix A.1 for further information.

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Node_

High_Scale

Node_

Low_Scale,

Data_Array_

High_Scale,

Data_Array_

Low_Scale,

Property, Units,

Object_

Instance,

Function, Node_Name, Data_Type

Data_Array_

Offset,

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Data_Array_

Name,

5.4.3. Map Descriptor Example

FS-8700-16 BACnet PTP Serial Driver Manual Page 12 of 20

Map_Descriptors

Map_Descriptors_

Name,

SMD_AI_01, DA_AI_01, 0, Server, Virtual_BCU_11, AI, 1, Present_Value, Deg_F, 0, 10000, 0, 100

SMD_AI_02, DA_AI_01, 1, Server, Virtual_BCU_11, AI, 2, Present_Value, Deg_F, 0, 10000, 0, 100

SMD_AI_03, DA_AI_01, 2, Server, Virtual_BCU_11, AI, 3, Present_Value, Deg_F, 0, 10000, 0, 100

SMD_AO_01, DA_AO_01, 0, Server, Virtual_BCU_11, AO, 1, Present_Value, %RH, 0, 10000, 0, 100

SMD_AO_02, DA_AO_01, 1, Server, Virtual_BCU_11, AO, 2, Present_Value, %RH, 0, 10000, 0, 100

SMD_AO_03, DA_AO_01, 2, Server, Virtual_BCU_11, AO, 3, Present_Value, %RH, 0, 10000 0, 100

Map_Descriptors

Map_Descriptor_Name, Data_Array_Name, Data_Array_Offset, Function, Node_Name, Data_Type, Object_Instance, Property

SMD_DI_01, DA_DI_01, 0, Server, Virtual_BCU_11, DI, 1, Present_Value

SMD_DI_02, DA_DI_01, 1, Server, Virtual_BCU_11, DI, 2, Present_Value

SMD_DI_03, DA_DI_01, 2, Server, Virtual_BCU_11, DI, 3, Present_Value

SMD_DO_01, DA_DO_01, 0, Server, Virtual_BCU_11, DO, 1, Present_Value

SMD_DO_02, DA_DO_01, 1, Server, Virtual_BCU_11, DO, 2, Present_Value

// Server Side Map Descriptors

SMD_DO_03, DA_DO_01, 2, Server, Virtual_BCU_11, DO, 3, Present_Value

FS-8700-16 BACnet PTP Serial Driver Manual Page 13 of 20

Appendix A. Driver Notes

Appendix A.1. Data_Type Legal Values – Abbreviation Descriptions

AI

ANALOG_INPUT

AO

ANALOG_OUTPUT

AV

ANALOG_VALUE

BI

BINARY_INPUT

BV

BINARY_VALUE

MI

MULTI_STATE_INPUT

MO

MULTI_STATE_OUTPUT

MV

MULTI_STATE_VALUE

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FS-8700-16 BACnet PTP Serial Driver Manual Page 14 of 20

Appendix B. Advanced Topics

Appendix B.1. BACnet Object Names

When an external BACnet Client builds a list of Object Names, the BACnet Server Map Descriptor
name determines the BACnet Object Name. If the Map Descriptor length is greater than 1, then 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].

Appendix B.2. BACnet Priority Arrays

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 will be stored to
the Map Descriptor Priority Array Table at the specified priority. The Priority Array Table is then
scanned and the value with the highest 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.

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. If the following data arrays are specified, however, they
will maintain an exact copy of the Priority Array Table for the Map Descriptor. Thus the Priority Array
Table can be accessed.

Section Title

Map_Descriptors

Column Title Function Legal Values

Name of Data Array where the Priority Array Table will

DA_Pri_Array

DA_Pri_Array_Offset Starting location in Data Array.

DA_Pri_In_Use

DA_Pri_In_Use_Offset Starting location in Data Array.

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

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

1-65535 ,17

Up to 16
alphanumeric
characters

1-65535, 17

Appendix B.3. Limitations of the BACnet READ_PROPERTY_MULTIPLE service.

The BACnet PTP client driver can read multiple BACnet objects using the
READ_PROPERTY_MULTIPLE service under the following conditions:

• The number of objects to be read must not exceed 29.

• No gaps must exist in the range of object to be read.

• The Map Descriptor function must be of the READ type. (e.g. RDBC)

• The Map Descriptor property must be Present Value.

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FS-8700-16 BACnet PTP Serial Driver Manual Page 15 of 20

Appendix B.4. Network number

The default Network number of a FieldServer is 5. In order to ensure communication between the
BACnet Client and all Servers on a BACnet network, however, it may be necessary to assign a
unique network number to each FieldServer.

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, refer to Section 5.1

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State_Text_Array

State_Text_Array

Length,

Preload_Data_Index

Node_Name,

Data_Array_Index,

Data_Array_Name,

Length,

Node_Name,

Data_Array_Index,

Data_Array_Name,

Function,

Data_Array_Length

Data_Format,

Preload_Data_Value, Preload_Data_Format,

Object_ID,

Data_Type,

Data_Array_Length

Data_Format,

Function,

Object_ID,

Data_Type,

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Appendix B.5. BACnet State Text Preload

Data_Arrays

Data_Array_Name,

DA_MI_01, UINT16, 100

DA_STATE_TXT, BYTE, 200

Preloads

Data_Array_Name,

FS-8700-16 BACnet PTP Serial Driver Manual Page 16 of 20

Method 1 – Using a Single Data Array:

DA_STATE_TXT, MyState1 MyState2 MyState3 MyState4 MyState5 MyState6, STRING, 0

Map_Descriptors

Map_Descriptor_Name,

CMD_MI_01, MI, 1 Server DA_MI_01, 0, N1 11, 1, DA_STATE_TXT

Method 2 – Using an Offset/User Table:

//set up a look up table

Offset_Table,

Offset_Table_Name, Table_String, Table_Index_Value

FIRE_ALRM_TEXT, SYSTEM READY,0 FIRE_ALRM_TEXT, ALARM, 1 FIRE_ALRM_TEXT, MAINTENANCE,2 FIRE_ALRM_TEXT, OFF-LINE, 3 FIRE_ALRM_TEXT, IN SERVICE,4 FIRE_ALRM_TEXT, OTHER, 5

Data_Arrays

Data_Array_Name,

DA_MI_01, UINT16, 100

Map_Descriptors

Map_Descriptor_Name,

CMD_MI_01, MI, 1 Server DA_MI_01, 1, N1 11, 1, FIRE_ALRM_TEXT

FS-8700-16 BACnet PTP Serial Driver Manual Page 17 of 20

Appendix C. Troubleshooting Tips

Appendix C.1. Debugging a BACnet connection – Hints and Tips

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

• If duplicate object instances are accidentally 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 “Virtual_BCU_…” is not being indicated as the device description for the FieldServer on the
BACnet SCADA system, then the FieldServer is not communicating with the SCADA system.
If the present value’s name is being indicated, but the present value shows question marks,
then it is most likely that the Client side of the FieldServer is not communicating.

• 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.

•

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

•

When a BACnet_PTP connection is established, and the connection is broken abruptly
(for instance a power down), the BCU might not know immediately that this happened. If
the FieldServer is the powered up again, it might take several seconds (up to 60
seconds) before polling will start again.

•

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

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

Trane Specific Tips

• When new points are added to the FieldServer it is important to restart 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.2. BACnet Specific Statistics

Stat Description Resolution

It is normal to receive a few link control

Link Control

Unsupported
Properties

Segmentation
Not Supported

Sequence Error

Write Access
Denied

Exception
Errors

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

Tel: [phone] Fax: [phone] Toll Free: 888-509-1970 email: [e-mail]

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

A request for an unsupported
property was received.

Data was requested but the
response would have exceeded the
maximum size of the APDU and
could not be sent using an un­segmented message.
Invoke ID of a reply did not match
the Invoke ID of the poll.

Writing to an object was denied.

A BACnet Service was denied
because it is not supported

messages. If the number is higher than
the transmit/receive messages, there may
be a problem with lost communications.
This is not an error. BACnet clients often
poll all properties of a particular object to
determine which properties are supported.

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

You should not see this message. It
normally indicates a configuration error.
This typically happens when trying to write
to an Input Object that is not Out-Of­Service. It is not possible to write to Input
Objects.
This may be a problem on the Client
system. Consult the PIC statement to
determine what services are supported.

FS-8700-16 BACnet PTP Serial Driver Manual Page 18 of 20

Appendix D. Units

Unit Variation 1 Variation 2 Variation 3

Amperes Amps A
Bars
BTUs
BTUs-per-hour
btus-per-pound
btus-per-pound-dry-air
centimeters
centimeters-of-mercury
centimeters-of-water
cubic-feet
cubic-feet-per-minute
cubic-feet-per-seconds
cubic-meters
cubic-meters-per-hour
cubic-meters-per-seconds
Currency1
Currency2
Currency3
Currency4
Currency5
Currency6
Currency7
Currency8
Currency9
Currency10
cycles-per-hour
cycles-per-minute
days
degrees-angular
Degrees-Celsius Deg-C Deg_C
degrees-celsius-per-hour
degrees-celsius-per-minute
Degrees-days-Celsius
Degrees-days-Fahrenheit
Degrees-Fahrenheit Deg-F Deg_F
degrees-fahrenheit-per-hour
degrees-fahrenheit-per-minute
Degrees-Kelvin Deg-K Deg_K
degrees-phase
delta-degrees-fahrenheit
delta-degrees-kelvin
feet
feet-per-minute
feet-per-second
foot-candles
grams-water-per-kg-dry-air
hectopascals
Hertz Hz
Horsepower HP
hours

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

Tel: [phone] Fax: [phone] Toll Free: 888-509-1970 email: [e-mail]

FS-8700-16 BACnet PTP Serial Driver Manual Page 19 of 20

Unit Variation 1 Variation 2 Variation 3

imperial-gallons
imperial-gallons-per-min
inches
inches-of-mercury
inches-of-water
Joules
joules-per-degree-kelvin
joules-per-kilogram-degree-kelvin
joules-per-kilogram-dry-air
Kilograms Kg
kilograms-per-hour
kilograms-per-minute
kilograms-per-second
Kilohertz KHz
kilohms
Kilojoules
kilojoules-per-kilogram
kilometers-per-hour
Kilopascals KPa
kilovolt-amperes kilovolt-amps KVA
kilovolt-amperes-reactive KVAR
kilovolts
kilowatt-hour-per-square-foot
kilowatt-hour-per-square-meter
kilowatt-hours KWh
kilowatts KW
liters
liters-per-hour
liters-per-minute
liters-per-second
lumens
luxes
Megahertz MHz
megajoules
megajoules-per-square-foot
megajoules-per-square-meter
megavolt-amperes megavolt-amps
Megavolt-amperes-reactive MVAR
megavolts
megawatts MW
megohms
meters
meters-per-second
miles-per-hour
milliamperes milliamps
millibars
millimeters
millimeters-of-mercury
Millivolts
Milliwatts
minutes
months

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

Tel: [phone] Fax: [phone] Toll Free: 888-509-1970 email: [e-mail]

FS-8700-16 BACnet PTP Serial Driver Manual Page 20 of 20

Unit Variation 1 Variation 2 Variation 3

No-Units No Units No_Units None
ohms
parts-per-billion
parts-per-million
Pascals
Percent
percent-obscuration-per-foot
percent-obscuration-per-meter
percent-per-second
percent-relative-humidity % RH; %RH Percent RH; PercentRH
Per-hour
per-minute
per-second
pounds-force-per-square-inch PSI pounds-force-per-sq-inch
Pounds-mass
pounds-mass-per-hour
pounds-mass-per-minute
pounds-mass-per-second
Power-Factor PF
psi-per-degrees-fahrenheit
radians
revolutions-per-minute
seconds Secs S
square-centimeters
square-feet
square-inches
square-meters
Therms
ton-hours
Tons
Tons-refrigeration
US-gallons Gallons
us-gallons-per-minute GPM
Volt-Amperes Volt-Amps VA
volt-amperes-reactive VAR
Volts Voltage
watt-hours Wh
Watts W
watts-per-square-foot
watts-per-square-meter
watts-per-square-meter-degrees-kelvin
weeks
years

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

Tel: [phone] Fax: [phone] Toll Free: 888-509-1970 email: [e-mail]