Neptronic SKH Series Manuel utilisateur

SKH-BACnet Guide-200114

High Pressure Atomiser

SKH Series

BACnet User Guide

High Pressure Atomiser Series

BACnet Communication Module User Guide

www.neptronic.com

Page | i

Contents

Introduction........................................................................................................................................................................1

Pre-requisites................................................................................................................................................................1

Advantages of BACnet..................................................................................................................................................1

BACnet Properties Configuration..................................................................................................................................2

Configuration Options .......................................................................................................................................................3

Quick Setup...................................................................................................................................................................3

Manual Setup................................................................................................................................................................3

MAC Address and Max_Master................................................................................................................................3

Network Reset...............................................................................................................................................................4

Device Object Properties ..................................................................................................................................................5

Object Types Supported ...............................................................................................................................................6

Out of Service Property.................................................................................................................................................7

Object Table Information...................................................................................................................................................8

Analog Input (AI) ...........................................................................................................................................................8

SKH EZC...................................................................................................................................................................8

Analog Output (AO).......................................................................................................................................................9

Analog Value (AV).........................................................................................................................................................9

SKH EZC.................................................................................................................................................................10

Binary Input (BI) ..........................................................................................................................................................12

Binary Output (BO)......................................................................................................................................................13

Binary Value (BV)........................................................................................................................................................13

SKH EZC.................................................................................................................................................................15

Multi State Value (MSV)..............................................................................................................................................17

SKH EZC.................................................................................................................................................................17

Other ...........................................................................................................................................................................19

Notes...............................................................................................................................................................................20

High Pressure Atomiser Series

BACnet Communication Module User Guide

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Page | 1

Introduction

The SKH High Pressure Atomiser Humidifier BACnet®Communication Module User Guide provides information about

using the humidifier with BACnet communications feature. The BACnet communication protocol for building automation

and control networks enables communication between client devices within a network. The humidifier provides a BACnet

network interface between BACnet client devices and Neptronic Humidifier series devices. It uses the BACnet Master

Slave/Token Passing (MS/TP) protocol at the BACnet MAC layer.

Pre-requisites

The BACnet communication user guide assumes that you are familiar with the concepts of BACnet and its terminology.

Advantages of BACnet

BACnet enabled humidifiers have the following advantages:

•Quick Message Transmission. The humidifier uses a synchronous implementation for BACnet messages making

it quick and efficient. Each BACnet confirmed service request is answered as quickly as possible without using

the Reply Postponed frame. The MS/TP implementation is performed within Tusage_delay of 15 minutes to

ensure a Tusage_timeout value within 20 minutes.

•MS/TP Support. The humidifier supports a Full Master Node state machine for MS/TP. Max_Master and the

instances are configured to the device object through BACnet WriteProperty service. The MAC address is set

via the DIP switches. Programming mode determines the MS/TP baud rate setting of 9600, 19200, 38400, and

76800. In the configuration mode, the device is configured through the device’s keypad. For more information

about the WriteProperty, refer to Table 3 - Object Types Supported.

•BIBB Support. The humidifier functions the same way as the B-ASC type profile server and supports the specific

BIBB as per their relevant definitions.

oDS-RP-B

oDS-RPM-B

oDS-WP-B

oDS-WPM-B

oDM-DCC-B

oDM-DDB-B

oDM-DOB-B

oDM-RD-B

oDM-TS-B

oDM-UTC-B

oDS-COV-B

oDS-COVP-B

oSCHED-WS-I-B

•Object Support. The humidifier supports a fixed list of BACnet visible values, which appear as Present_Values

of various BACnet standard object types in addition to a device object. For more information, refer to Table 3 -

Object Types Supported.

•Alarms. The humidifier supports indication of various alarm conditions through value changes in properties of

several objects. However, it does not generate BACnet event notifications.

High Pressure Atomiser Series

BACnet Communication Module User Guide

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Page | 2

BACnet Properties Configuration

To establish communication on the network, and guarantee a unique ID of devices in a BACnet system, the following

properties may have to be configured.

Table 1 - BACnet Properties Configuration

Property

Default Value

Configuration

MAC Address

000

Set to a value between 000 and 127 via DIP switches. Can also be

set to a value between 000 and 254 via menu.

The values from 128-254 represent MS/TP non-token passing slave

devices.

Device Instance

Auto

•The humidifier automatically configures its device instance to

153,000 + MAC address.

•The value can be set manually via the menu.

•The value can be set manually through the WriteProperty

service to Device Object.Object_Identifier.

•The device’s Object_Identifier is a combination of the Device

Object_Type (8) and the Device_Instance (0-4194302),

therefore its decimal or hexadecimal representation tends to be

incomprehensible.

•For example, the Device_Instance=1000 has an equivalent

Object_Identifier of 0x020003E8 hexadecimal or 33555432

decimal.

Baud Rate

0 = Auto

•The humidifier configures its baud rate automatically by detecting

the network upon connection.

•The value can be set manually from the available values of Auto,

9600, 19200, 38400, 76800.

Max_Master

127

•Configure Max_Master value to increase network efficiency when

there are less than 127 devices on the network.

•The Max_Master value can be changed through the TRL to

configure WriteProperty service to the Device

Object.Max_Master.

For more information, refer to the MAC Address and Max_Master

section.

Device Object.Object_Name

Name of the device

•Configure the name of the device through WriteProperty service

to the Device Object.Object_Name. For example, SKH.

High Pressure Atomiser Series

BACnet Communication Module User Guide

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Page | 3

Configuration Options

The following options enable you to configure and run the BACnet features of the humidifiers quickly.

Quick Setup

Configure the humidifier's baud rate and device instance without programming.

1. Connect the humidifier to the network and power it up.

2. The humidifier automatically configures the baud rate and device instance.

3. Repeat the steps for each humidifier.

Manual Setup

1. To use a Device_Instance other than 153,000, and/or if your site has more than one humidifier network,

go to the menu.

2. Disconnect the power to the humidifier, connect the humidifier to the network, and connect the power

again.

3. Configure the Max_Master value through WriteProperty service to the Device Object.Max_Master to

increase network efficiency or if there are less than 127 devices on the network.

MAC Address and Max_Master

The MAC address must be unique on the entire MS/TP network. However, having a unique MAC address and a high

baud rate does not guarantee efficient operation of the humidifier and other MS/TP units on the MS/TP network. Some

MAC address and Max_Master combinations are more efficient than others. BACnet requires token-passing units to

occasionally “poll” for other masters based on the MAC address and Max_Master.

A poor combination of MAC addresses and Max_Master can lead to a slower network due to lost time polling for masters

that are not present. Unless there are 126 other units on the MS/TP network, the default Max_Master value of 127 is

not the most efficient choice for the humidifier. The Max_Master default value of 127 was selected to ensure that any

master, specifically a BACnet client can be found when the humidifier is initially started.

Examples of Mac Address and Max_Master Configurations

The following are some of the examples to indicate the optimum combination of Mac address and Max_Master

configurations to ensure a quick and efficient output.

Example 1

•MAC=0. Max_Master=127

•MAC=1, Max_Master=127

This configuration is slow and inefficient because every time either unit is required to find another master unit, it has to

poll 126 units until it finds the right one to pass the token.

Example 2

•MAC=0. Max_Master=5

•MAC=1 to MAC=4 are not used

•MAC=5, Max_Master=5

This configuration is better than Example 1 but it is still slower. The Max_Master is set to the most efficient value but

the gap between the two MAC addresses is high. Therefore, each unit must poll four units until it finds the right one to

pass the token.

Example 3

•MAC=0. Max_Master=1

•MAC=2, Max_Master=2

This is an incorrect configuration. The MAC=0 will never find MAC=2 because it will never poll for the master MAC

address=2.

High Pressure Atomiser Series

BACnet Communication Module User Guide

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Page | 4

Example 4

•MAC=0. Max_Master=3

•MAC=1, Max_Master=3

•MAC=2, Max_Master=3

•MAC=3, Max_Master=3

This is an efficient configuration as the units are numbered consecutively and the MAX_Master is set to the most efficient

value. As a general guideline, the most efficient setup for an MS/TP network is one in which the units are consecutively

numbered starting at MAC address 0 and having Max_Master=the maximum MAC address in the system. If consecutive

numbering is not possible, then the next most efficient setup is one in which all units have Max_Master=the maximum

MAC address in the system.

Network Reset

Reset the humidifier via BACnet using the Reinitialize Device service. The Reinitialize Device service can be accessed

using the following password: nep.

The Reinitialize Device service has two types of reset:

•Warm Reset. The Warm Reset restarts the humidifier with actual configuration.

•Cold Reset. The Cold Reset restarts the humidifier with Factory configuration.

Warning: The Cold Reset erases the actual configuration when setting the MSTP address. Therefore, exercise

caution while performing a Cold Reset.

High Pressure Atomiser Series

BACnet Communication Module User Guide

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Page | 5

Device Object Properties

The following table lists all the BACnet properties supported for the device object. The W indicates that the property is

writable using the BACnet WriteProperty service.

Table 2 - Device Object Properties

Property

Value

Writable

Object_Identifier

•Programmable where the instance part of the Object_Identifier is in the range of 0-

4194302

•The device instance must be unique system-wide

•The default value for the device instance=153000 (Vendor_Identifier*1000)

Object_Name

SKH

Description

Programmable up to 32 characters (default: SKH).

Object_Type

Device

System_Status

Operational

Vendor_Identifier

Always 153

Vendor_Name

Always Neptronic

Model_Name

Example, SKH

Read Only

Firmware_Revision

currently, 2.05

Read Only

Application_Software_Version

currently, 2.03

Read Only

Protocol_Version

Always 1

Read Only

Protocol_Revision

Read Only

DataBase_Revision

Read Only

Max_APDU_Length_Accepted

Always 480

Read Only

Segmentation_Supported

(3) = No Segmentation

Read Only

APDU_Timeout

6000

Number_of_APDU_Retries

Always 3

Read Only

Local_Time

00:00:00

Local_Date

01-Jan-2015 (Thu)

Uts_Offset

-3:00

Daylight_Savings_Status

False

Backup_Failure_Timeout

300

Configuration_Files

File-1

Last_Restore_Time

2015-01-01 (Thu), 00:01:50:00

Backup_And_Restore_State

IDLE

Backup_Preparation_Time

Restore_Completion_Time

Restore_Preparation_Time

Protocol_Services_Supported

•07470BC83AE200

•confirmedCOVNotification

•subscribeCOV

•atomicReadFile

•atomicWriteFile

•readProperty

•readPropertyMultiple

•WriteProperty

•writePropertyMultiple

•deviceCommunicationControl

•reinitializeDevice

•i-Am

•i-Have

•unconfirmedCOVNotification

•unconfirmedPrivateTransfer

•timeSynchronization

•who-Has

•who-Is

•subscribeCOVProperty

Protocol_Object_Types_Supported

•analog-input

•analog-output

•analog-value

•binary-input

•binary-output

•binary-value

•device

•file

•program

•schedule

•multi-state-value

Object_List

196

Read Only

Device_Address_Binding

Always empty

Max_Master

Programmable in the range of 0-127 (default: 127)

Max_Info_Frames

Always 1

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BACnet Communication Module User Guide

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Property

Value

Writable

Proprietary property #1000

•Represents the MS/TP MAC address in the range of 0 to 254 (default: 0)

•Writable if all MAC address DIP switches are OFF

•Values 128 to 254 represent MS/TP non-token passing slave devices

Proprietary property #1001

•Programmable (default: Auto)

•Represents the MS/TP Baud rate (unsigned type)

•Values are 0 (auto), 9600, 19200, 38400, 76800

•Reading this property always returns the actual Baud rate

Proprietary property #1002

•Programmable (default: 15 minutes)

•Represents the period of time that an object in/out of service will automatically

return to normal. Range = 0-120 minutes (unsigned type)

•Writing 0 means no automatic return to normal

Object Types Supported

The following table lists all the BACnet properties supported for each object type. Most of the properties are locked. The

exception is Present_Value, which represents the dynamic operating values of the device, and the Status_Flag,

Event_State,and Reliability properties, which reflect the availability of the Present_Value. Unless otherwise specified,

properties are not changeable.

Table 3 - Object Types Supported

Object

Type

Enabled

Optional Properties

Supported

Writable Properties

Notes

Analog

Input



•Reliability

•Description

•Min_Present_Value

•Max_Present_Value

•Resolution

•COV-Increment

•Out_of_Service

•COV-Increment

•If "Out of Service" is true, Present_Value and

Status_Flag become writable properties.

•Out_of_Service property is writable for objects to

which Present_Value is not writable. Refer to Out of

Service Property section on page 7 for more

information.

•Object will automatically return to Normal after a

programmable period of time. Refer to Proprietary

property #1002 of Device Object in Table 2 - Device

Object Properties.

Analog

Value



•Reliability

•Description

•COV-Increment

•Priority_Array

•Relinquish_Default

•Present_Value

•Out_of_Service

•COV-Increment

•Present_Value property is writable for every AV

object except AV.20, AV.23, AV.40, AV.45, AV.55

•Out_of_Service property is writable for objects

indicated in Table 6 - Object Table Information:

Analog Value (AV) on page 9.

•Refer to Out of Service Property section on page 7

for more information.

•Object will automatically return to Normal after a

programmable period of time. Refer to Proprietary

property #1002 of Device Object in Table 2 - Device

Object Properties. Some objects are commandable.

In such case, the priority-array and relinquish-default

properties are available.

•Writable properties are different for some objects.

Refer to the respective Object Table information to

know the writable property for each AV object.

Analog

Output



•Description

•Reliability

•Min-Pres-Value

•Max-Pres-Value

•Resolution

•COV-Increment

•Present_Value

•COV-Increment

•Present_Value property is writable as per Analog

Output (AO) table on page 8.

Binary

Input



•Reliability

•Active_Text

•Inactive_Text

•Description

Out_of_Service

•If "Out of Service" is true, Present_Value and

Status_Flag become writable properties.

•Out_of_Service property is writable for objects to

which Present_Value is not writable. Refer to Out of

Service Property section on page 7 for more

information.

•Object will automatically return to Normal after a

programmable period of time. Refer to Proprietary

property #1002 of Device Object in Table 2 - Device

Object Properties.

Binary

Value



•Reliability

•Active_Text

•Inactive_Text

•Description

Present_Value

•Present_Value property is writable for every Binary

Value object.

•Writable properties are different for some objects.

Refer to the respective Object Table information to

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BACnet Communication Module User Guide

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Page | 7

Object

Type

Enabled

Optional Properties

Supported

Writable Properties

Notes

•Priority_Array

•Relinquish_Default

know the writable property for each BV object.

•Out_of_Service property is writable for every Binary

Value object.

•Some objects are commandable. In such case, the

priority-array and relinquish-default properties are

available.

•Object automatically returns to Normal after a

programmable time. Refer to Proprietary property

#1002 of Device Object in Table 2 - Device Object

Properties.

Binary

Output



•description

•reliability

•inactive-text

•active-text

Present_Value

•Present_Value property is writable.

Device



•Max_Master

•Max_Info_Frame

•Description

•active-cov-subscriptions

•#1000 (MSTP addr)

•#1001 (Baud rate)

•#1002 (Time out)

•Local_Time

•Local_Date

•Uts_Offset

•Daylight_Savings_Status

•Apdu_Timeout

•Backup_Failure_Timeout

•Object_Identifier

•Object_Name

•Max_Master

•Description

•Local_Time

•Local_Date

•Uts_Offset

•Daylight_Savings_Status

•Apdu_Timeout

•Backup_Failure_Timeout

•#1000

•#1001

•#1002

•Configuration_Files

•Last_Restore_Time

•Backup_And_Restore_State

•Backup_Preparation_Time

•Restore_Completion_time

•Restore_Preparation_Time

•Refer to Table 2 - Device Object Properties on page

Multi-

State

Value



•Description

•Reliability

•States_Text

Present_Value

•Present_Value property is writable for every Multi

State Value object except MSV.12, MSV.13, MSV.15

•Writable properties are different for some objects.

Refer to the respective Object Table information to

know the writable property for each MSV object.

•Out_of_Service property is not writable for MSV.

Out of Service Property

Neptronic humidifiers offer the use of the Out of Service writable property. When the value of this property is set to True,

it disconnects the object from the physical input, enabling you to input other values. This is useful for special applications

or while troubleshooting. For example, you can ignore the temperature read from a sensor and input the desired

temperature value in order to perform specific tests.

For security reasons, a timeout will set the Out of Service property back to False after 15 minutes. This value can be

modified to between 0 and 120 minutes (For more information, see proprietary property #1002 in Table 2 - Device Object

Properties).

High Pressure Atomiser Series

BACnet Communication Module User Guide

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Page | 8

Object Table Information

The SKH series uses the following BACnet object tables, categorized on the basis of their ID. The type is the BACnet Object type, the instance is the BACnet Object. Together,

the type and instance form the BACnet Object_Identifier for an object according to the following C-language algorithm:

•object_identifier=(unsigned long)((unsigned long)type<<22)+instance

Analog Input (AI)

Table 4 - Object Table Information: Analog Input (AI)

Name

Description

Notes

Integrator

AI.1

SKHBoardTemp

Displays the temperature reading measured on the SKH PC board.

Out of Service

0°C to 100°C, Resolution: 0.1°C

SKH EZC

Name

Description

Notes

Integrator

AI.3

RoomRHSetpoint or

RoomTempSetpoint

Displays the setpoint for the room relative humidity sensor. OR

Displays the setpoint for the room temperature sensor.

Out of Service

0.0 to 100.0%RH or 10°C to 40°C, Resolution 0.1%RH or 0.01°C

AI.4

RoomRH

Displays the reading of the relative humidity in the room.

Out of Service

0.0 to 100.0%RH, Resolution 0.1%RH

AI.5

RoomTemp

Displays the temperature reading of the room.

Out of Service

-100°C to 100°C, Resolution 0.01°C

AI.6

DuctRH

Displays the relative humidity reading of the duct.

Out of Service

0.0 to 100.0%RH, Resolution 0.1%RH

AI.7

TrlhRH

Displays the value of the relative humidity measured on the TRL.

Out of Service

0.0 to 100.0%RH, Resolution 0.1%RH

AI.8

TrlhTemp

Displays the value of the temperature measured on the TRL.

Out of Service

0°C to 50°C, Resolution 0.01°C

AI.9

BoardTemp

Displays the temperature reading measured on the PC board.

Read Only

0°C to 100°C, Resolution 0.01°C

Advanced

AI.200

DI4_TpmDuty

Out of Service

0 milliseconds to 1000 milliseconds, Resolution 1millisecond

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