Danfoss VLT HVAC Drive Metasys N2 Bedienungsanleitung

MAKING MODERN LIVING POSSIBLE

Operating Instructions

Metasys N2

VLT® HVAC Drive FC 102

VLT® AQUA Drive FC 202

Contents

1 Overview 2

1.1.1 Software Version 2

1.1.2 Introduction 2

1.1.3 About this Manual 2

1.1.4 References 2

2 Instructions 3

2.1.1 Abbreviations and Definitions 3

2.1.2 Network Connection 3

2.1.3 Hardware Set-up 3

2.1.5 VLT Parameters 4

3 Appendix 18

3.1.1 Analog Inputs (AI) 18

3.1.2 Binary Inputs (BI) 19

3.1.3 Analog Outputs (AO) 23

3.1.4 Binary Outputs (BO) 24

3.1.5 Internal Floating Point (ADF) 25

3.1.6 Internal Integers (ADI) 27

Index 29

Contents VLT®Metasys

MG.11.G2.02 - VLT®is a registered Danfoss trademark 1

1 Overview

1.1.1 Software Version

VLT HVAC Drive

FC 102 Series

Software version: 3.4x

and VLT AQUA Drive FC 202 Series

Software version: 1.7x

This guide can be used with all VLT HVAC Drive frequency converters with

software version 3.4x and VLT AQUA Drive frequency converters with

software version 1.7x.

The actual software version number can be read from

par. 15-43 Software Version.

1.1.2 Introduction

The frequency converter control board is program selectable

for use with the Johnson Controls Metasys N2 protocol.

Metasys N2 is a master/slave control network. The physical

layer is RS-485 compatible, half duplex 9600 baud shielded

twisted pair. The N2 software protocol is designed to be

general in nature to accommodate the unique properties each

device type may have. Every device connection to the N2

network can be thought of as a small data manager. Data

points in the database are classified as analog I/O (floating

point), binary I/O or integer data points - floats, integers or

bytes. Each data type has its own unique structure defined in

the Metasys N2 system Protocol Specification for Vendors.

The information in this manual is intended to provide you with

comprehensive information on how to install and set up the

frequency converter for communication over a Metasys

network.

For specific information on operation of the drive, refer to the

VLT HVAC Drive Operating Instructions, MG.11.Ax.yy or the VLT

AQUA Drive Operating Instructions, MG.20.Mx.yy.

1.1.3 About this Manual

This manual is for both instructional and for reference

purposes. This manual can also serve as aguideline when you

specify and optimize your communication system.

It is highly recommended that you read this manual in its

entirety before initiating any programming. It is assumed that

the user has full knowledge of the capabilities and limitation

of the controller node in addition to full knowledge of the

frequency converter.

1.1.4 References

In addition to this manual, the following two manuals should

be consulted: VLT HVAC Drive Operating Instructions, MG.

11.Ax.yy, VLT AQUA Drive Operating Instructions, MG.20.Mx.yy

and Johnson Controls METASYS N2 System Protocol Specification

for Vendors, Johnson Controls number 04-3402-22, rev A.

Overview VLT®Metasys

2 MG.11.G2.02 - VLT®is a registered Danfoss trademark

2 Instructions

2.1.1 Abbreviations and Definitions

ACK Acknowledge

ADF Internal Floating Points

ADI Internal Integers

AI Analog Inputs

AO Analog Outputs

BI Binary Inputs

BO Binary Outputs

COS Change Of State

FC Frequency Converter

HPFB High Performance Field Bus

JCI Johnson Controls Inc. developers of the METASYS N2 protocol

N2 METASYS N2

mast

AN2 master is either aPC with JCI software or adedicated JCI

controller

NAK Not acknowledged

NPA N2 Point Address (Each N2 Point Type has a address range

from 0 to 255)

NPT N2 Point Type

PAR Parameter Number

2.1.2 Network Connection

Connect signal wires to terminal 68 (N+) and terminal 69 (N-)

on main control board of the drive. If shielded cabling is used,

connect one end of the shield to terminal 61. This terminal is

connected to ground via an internal RC link. It is highly

recommended to use shielded twisted-pair cables to reduce

the differential mode interference between the conductors.

Danfoss do not take any responsibility for consequences, if

unshielded or untwisted cables are used.

Torque Specifications: 4.5 in.lb. (0.5 Nm) if screw terminal is used

Control wire: 18 - 24 AWG, shielded, twisted pair

2.1.3 Hardware Set-up

RS-485 Bus Connection:

One or more frequency converters can be connected to a

control (or master) using the RS-485 standardized interface.

Terminal 68 is connected to the P signal (TX+, RX+), while

terminal 69 is connected to the Nsignal (TX-,RX-). If more than

one frequency converter is connected to amaster, use parallel

connections.

130BA060.11

68 69 68 69 68 69

RS 485

RS 232

USB

1 2

S801

130BA272.11

Illustration 2.1: Bus termination switch

NOTE

The factory setting for the dip switch is OFF.

In order to avoid potential equalizing currents in the screen,

earth the cable screen via terminal 61, which is connected to

the frame via an RC-link.

Bus termination: The RS-485 bus must be terminated by a

resistor network at both ends. For this purpose, set switch

S801 on the control card to "ON". For more information, see

the paragraph: Switches S201, S202 and S801.

Instructions VLT®Metasys

MG.11.G2.02 - VLT®is a registered Danfoss trademark 3

2.1.4 Error Codes

Error Code 00 is issued after power up or after a time out where all overridden points were released, as long as no Identify yourself

command has been issued by the master.

Error Code 01 is issued if the command is not supported or not known by the drive.

Error Code 02 is issued if the received telegram has a checksum error.

Error Code 03 is issued if the N2 telegram receive buffer exceeds 256 characters.

Error Code 05 is issued if the received N2 telegram is too long.

Error Code 10 is issued the data is out of expected range

Error Code 11 is issued when:

1. A point attributes or attribute bit is unused.

2. A point attributes or attribute bit is for JCI use only.

3. An internal data point attribute for current value can not be changed while running

Error Code 12 is issued when:

1. The N2 master tries to change attribute 2 bit 6 "Current State" on a BO and the drive is tripped.

2. The N2 master tries to change attribute 2bit 6"Current State" on aBO and the drive is trip locked except for BO 5

"reset"

2.1.5 VLT Parameters

The following parameters may need to be manually set for each drive in the Metasys N2 network. Refer to the VLT HVAC Drive

Design Guide, MG.11.Bx.yy, or VLT AQUA Drive Design Guide, MG.20.Nx.yy, for the frequency converter for programming.

Parameter list

VLT Parameter Description Default Desired Setting

8-01 Control Side Digital & Ctrl. Word

8-02 Control Source FC Port FC Port

8-03 Control Word Timeout 60 s 1-18000 s

8-30 Protocol FC Metasys N2

8-31 Address 1 1-255

8-32 Baud Rate 9600 Fixed to 9600

8-33 Parity Even, 1stop Fixed to No Parity, 1stop

8-37 Maximum Inter-char Delay 25 s for Metasys N2

Instructions VLT®Metasys

4 MG.11.G2.02 - VLT®is a registered Danfoss trademark

2.1.6 General Commands (Acknowledged)

VLT Response Command Subcommand NPA Object

no. Attribute Message Type Error Code Comments

ACK 0 4 - Poll Message

No Acknowledge -

The slave is to respond with any data

points, analog or binary I/O that have

been flagged for COS

ACK 0 5 - Poll message

With Acknowledge -

The slave is to respond with any data

points, analog or binary I/O that have

been flagged for COS

ACK 0 9 - Status update Message -

Slave device must respond with device

manufacturing model number (Par. 6-21),

days in service (Par. 6-00) and device

status

ACK F - - Identify Device Type -

Slave device responds with an identifica-

tion number of 10H to indicate non JCI

device

ACK 0 0 - Synch Time - The internal clock is syncronized by this

command

ACK, no action 8 0 - Upload - Optional, no support in the frequency

converter

ACK, no action 8 1 - Upload - Optional, no support in the frequency

converter

ACK, no action 8 3 - Upload Record - Optional, no support in the frequency

converter

ACK, no action 8 4 - Upload Complete - Optional, no support in the frequency

converter

ACK, no action 9 0 - Download - Optional, no support in the frequency

converter

ACK, no action 9 1 - Download - Optional, no support in the frequency

converter

ACK, no action 9 3 - Download - Record optional, no support in the

frequency converter

ACK, no action 9 4 - Download Complete - Optional, no support in the frequency

converter

NAK 0 1 - Read Memory 01 Slave device memory read based on

memory addresses

NAK 0 8 - Warm Start 01 JCI use only

Instructions VLT®Metasys

MG.11.G2.02 - VLT®is a registered Danfoss trademark 5

2.1.7 Analog Input Commands (Acknowledged)

VLT

Response

Command Subcom-

mand Region NPA Object

no.

Attribute

No. Attribute Message Type Comments

ACK 1 - 1 0-23 1 Byte Read Analog

Input

Read Object Configuration attribute

associated with each individual point

ACK 1 - 1 0-23 2 Byte Read Analog

Input

1) Read Object Status attribute

associated with each individual point

ACK 1 - 1 0-23 3 Float Read Analog

Input

2) Read Analog Input Value attribute

associated with each individual point

ACK 1 - 1 0-23 8 Float Read Analog

Input

Read Low Alarm attribute associated

with each individual point

ACK 1 - 1 0-23 9 Float Read Analog

Input

Read Low Warning attribute associ-

ated with each individual point

ACK 1 - 1 0-23 10 Float Read Analog

Input

Read High Warning attribute associ-

ated with each individual point

ACK 1 - 1 0-23 11 Float Read Analog

Input

Read High Alarm attribute associated

with each individual point

ACK 1 - 1 0-23 12 Float Read Analog

Input

Read Differential attribute associated

with each individual point

ACK 2 - 1 0-23 1 Byte Write Analog

Input

Write to Object Configuration attrib-

ute associated with each individual

point

ACK 2 - 1 0-23 8 Float Write Analog

Input

Write to Low Alarm Limit attribute

associated with each individual point

ACK 2 - 1 0-23 9 Float Write Analog

Input

Write to Low Warning Limit attribute

associated with each individual point

ACK 2 - 1 0-23 10 Float Write Analog

Input

Write to High Warning Limitattribute

associated with each individual point

ACK 2 - 1 0-23 11 Float Write Analog

Input

Write to High Alarm Limit attribute

associated with each individual point

ACK 2 - 1 0-23 12 Float Write Analog

Input

Write to Differential attribute associ-

ated with each individual point

ACK, no

action 7 2 1 0-23 - Float Override

Analog inputs

Analog inputs are "outputs" from the

frequency converter and should not

be written over by the network

controller

ACK, no

action 7 3 1 0-23 - - Override

Analog Release

Analog inputs are "outputs" from the

frequency converter and should not

be written over by the network

controller

ACK, no

action 7 7 1 0-23 - -

Write Analog

Input Attrib-

utes

Optional command for slave devices.

Only used for N2

commissioning purposes

Instructions VLT®Metasys

6 MG.11.G2.02 - VLT®is a registered Danfoss trademark

2.1.8 Analog Input Commands (Not Acknowledged)

VLT

Response

Comm and Region NPA Object no. Attribute

No.

Attribute Message Type Error

Code

Comments

NAK 1 1 0-23 4 Float Read Analog

Input

111 ) Read Linear Ranging Parameter 1

attribute associated with each

individual point. (JCI use only)

NAK 1 1 0-23 5 Float Read Analog

Input

111) Read Linear Ranging Parameter 2

attribute associated with each

individual point. (JCI use only)

NAK 2 - 0-23 2 Byte Write Analog

Input

111) Object Status writeable

NAK 2 - 0-23 3 Float Write Analog

Input

111) Analog Input Value not writeable

NAK 2 - 0-23 4 Float Write Analog

Input

111) Write to Linear Ranging Parame-

ter 1 attribute associated with

each individual point. (JCI use

only)

NAK 2 - 0-23 5 Float Write Analog

Input

111) Write to Linear Ranging Parame-

ter 2 attribute associated with

each individual point. (JCI use

only)

NAK 2 - 0-23 6 Float Write Analog

Input

111) Write to Linear Ranging Parame-

ter 3 attribute associated with

each individual point. (JCI use

only)

NAK 2 - 0-23 7 Float Write Analog

Input

111) Write to Linear Ranging Parame-

ter 4 attribute associated with

each individual point. (JCI use

only)

NAK 2 - 0-23 13 Integer Write Analog

Input

111) Write to Filter Weight attribute

associated with each individual

point. (JCI use only)

NAK 2 - 0-23 14 Float Write Analog

Input

111) Write to AI Offset attribute associ-

ated with each individual point.

(JCI use only)

1) Error code 11 is used because attributes are considered as fields/records in the point map database.

Instructions VLT®Metasys

MG.11.G2.02 - VLT®is a registered Danfoss trademark 7

2.1.9 Analog Output Commands (Acknowledged)

VLT

Response

Command Sub

command

Region NPA Object no. Attribute

No.

Attribute Message Type Comments

ACK 1 - 3 0-2 1 Byte Read Analog

Output

Read Object Configuration

attribute associated with each

individual point

ACK 1 - 3 0-2 2 Byte Read Analog

Output

Read Object Status attribute

associated with each individual

point

ACK 0 9 - - - - Status update

Message

Slave device must respond

with device manufacturing

model number (Par. 6-21), days

in service (Par. 6-00) and

device status

ACK 1 - 3 0-2 3 Float Read Analog

Output

Read Current Value attribute

associated with each individual

point

ACK 2 - 3 0-2 1 Byte Write Analog

Output

Write to Object Configuration

attribute associated with each

individual point

ACK 7 2 3 0-2 - Float Override Analog

Output

Write to analog output current

value (frequency setpoint)

ACK 7 2 3 0-2 - Float Override Analog

Output

Write to analog output current

value (frequency setpoint)

ACK 7 3 3 0-2 - - Override Release Set the current value, the value

that it was before the 1.

Override Command was issued

ACK, no

action

7 7 3 0-2 - - Write Analog

Output

Optional command for slave

devices. Only used for N2

Attributes commissioning

purposes. Not to be implemen-

ted at this time

ACK, no

action

7 8 3 0-2 - - Read Analog

Output Attributes

Optional command for no

action slave devices. Only used

for N2 commissioning

purposes. Not to be implemen-

ted at this time

Instructions VLT®Metasys

8 MG.11.G2.02 - VLT®is a registered Danfoss trademark

2.1.10 Analog Output Commands (Not Acknowledged)

VLT

Response

Command Region NPA Object

no.

Attribute

No.

Attribute Message Type Error

Code

Comments

0-2 1 3 0-2 4 Float Read Analog

Output

111Read Low Linear Ranging

Parameter attribute associated

with each individual point. (JCI

use only)

NAK 1 3 0-2 5 Float Read Analog

Output

111Read High Linear Ranging Para-

meter attribute associated with

each individual point. (JCI use

only)

NAK 2 3 0-2 2 Byte Write Analog

Output

111Object Status not writeable

NAK 2 3 0-2 3 Float Write Analog

Output

111Write to Current Value structure

attributes associated with each

individual point. (N2 does not

support this, override function

must be used)

NAK 2 3 0-2 4 Float Write Analog

Output

111Write Debouncing Value in msec

attribute associated with each

individual point.(JCI use only)

NAK 2 3 0-2 5 Float Write Analog

Output

111Write Accumulator value attrib-

ute associated with each individ-

ual point. (JCI use only)

1) Error code 11 is used because attributes are considered as fields/records in the point map database.

Instructions VLT®Metasys

MG.11.G2.02 - VLT®is a registered Danfoss trademark 9

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