Danfoss VACON NXP Air cooled User manual

vacon nx ac drives optc2/c8 modbus/n2 option board user manual

1.

INDEX Document code: DPD00899A

Date 19.01.2012

GENERAL ........................................................................................................................... 3

2. RS-485 OPTION BOARD TECHNICAL DATA ........................................................................ 4

2.1 General ......................................................................................................................................... 4

3. RS-485 FIELDBUS BOARD LAYOUT AND CONNECTIONS ................................................... 5

3.1 RS-485 OPTC2 option board ......................................................................................................... 5

3.2 RS-485 OPTC8 option board ......................................................................................................... 6

3.3 Grounding ..................................................................................................................................... 7

3.3.1 Grounding by clamping the cable to the converter frame .................................................7

3.3.2 Grounding only one point on the net ..................................................................................9

3.3.3 Grounding jumper X1 ....................................................................................................... 10

3.4 Bus terminal resistors................................................................................................................ 11

3.5 Bus Biasing ................................................................................................................................. 12

3.6 LED indications ........................................................................................................................... 13

4. INSTALLATION OF VACON NX RS-485 BOARD ................................................................. 14

5. COMMISSIONING .............................................................................................................. 16

5.1 Fieldbus board parameters ........................................................................................................ 16

6. MODBUS ........................................................................................................................... 19

6.1 Modbus RTU protocol, introduction ............................................................................................ 19

6.1.1 Supported functions ......................................................................................................... 21

6.1.2 Exception responses ........................................................................................................ 23

6.2 Modbus interface ........................................................................................................................ 25

6.2.1 Modbus registers ............................................................................................................. 25

6.2.2 Process data .................................................................................................................... 25

6.2.3 Process data in ................................................................................................................ 26

6.2.4 Process data out .............................................................................................................. 27

6.2.5 Parameters ...................................................................................................................... 30

6.2.6 Actual values .................................................................................................................... 30

6.2.7 Example messages .......................................................................................................... 31

6.3 Start-up test ............................................................................................................................... 33

7. METASYS N2 ..................................................................................................................... 34

7.1 Metasys N2 Protocol Introduction .............................................................................................. 34

7.2 Metasys N2 interface .................................................................................................................. 34

7.2.1 Analogue Input (AI) .......................................................................................................... 34

7.2.2 Binary Input (BI) ............................................................................................................... 34

7.2.3 Analogue Output (AO)....................................................................................................... 35

7.2.4 Binary Output (BO) ........................................................................................................... 35

7.2.5 Internal Integer (ADI) ....................................................................................................... 35

7.3 N2 POINT MAP ............................................................................................................................ 36

7.3.1 Analogue Inputs (AI) ......................................................................................................... 36

7.3.2 Binary Inputs (BI) ............................................................................................................. 37

7.3.3 Analogue Outputs (AO) ..................................................................................................... 37

7.3.4 Binary Outputs (BO) ......................................................................................................... 38

7.3.5 Internal Integers (ADI) ..................................................................................................... 38

8. FAULT TRACKING ............................................................................................................. 39

APPENDIX 1 ............................................................................................................................................ 40

general vacon • 3

1. GENERAL

Instead of sending and receiving information to and from frequency converters through I/O, you can connect them to a fieldbus.

Vacon NX frequency converters can be connected to the RS-485 bus using a fieldbus board. The converter can then be controlled, monitored and programmed from the host system.

If you purchase your RS-485 Option Board separately, please note that it shall be installed in slot E on the control board of the frequency converter.

Internal components and circuit boards are at high potential when the frequency converter is connected to the power source. This voltage is extremely dangerous and may cause death or severe injury if you come into contact with it.

WARNING!

24-hour support +358 (0)40 8371 150 • Email: [email protected]

1

4 • vacon technical data

2. RS-485 OPTION BOARD TECHNICAL DATA

2.1 General

Connections

Communications

Environment

Interface

Data transfer method

OPTC2: Pluggable connector (5.08mm)

OPTC8: 9-pin DSUB connector (female)

RS-485, half-duplex

Transfer cable Twisted pair (1 pair and shield)

Electrical isolation 500 VDC

Modbus RTU

Metasys N2

As described in document “Modicon Modbus Protocol

Reference Guide”

Find it for example at: http://public.modicon.com/

As described in Metasys N2 System Protocol Specification

Baud rate

Addresses

Ambient operating temperature

Storing temperature

300, 600, 1200, 2400, 4800, 9600, 19200 and 38400 kbaud

1 to 247

–10°C…55°C

–40°C…60°C

Humidity

Altitude

Vibration

Safety

Table 1. RS-485 technical data

<95%, no condensation allowed

Max. 1000 m

0.5 G at 9…200 Hz

Fulfils EN50178 standard

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layout and connections vacon • 5

3. RS-485 FIELDBUS BOARD LAYOUT AND CONNECTIONS

Vacon RS-485 Fieldbus Board is connected to the fieldbus through either a 5-pin pluggable bus connector (board OPTC2) or a 9-pin female sub-D-connector (board OPTC8).

The communication with the control board of the frequency converter takes place through the standard Vacon Interface Board Connector.

3.1 RS-485 OPTC2 option board

3

4

5

1

2

X4

X1

Bus connector Jumpers

Grounding plate

Figure 1. Vacon RS-485 option board OPTC2

Interface board connector

Signal

NC*

VP

Connector

1*

2

Description

No connection

Supply voltage – plus (5V)

RxD/TxD –N

RxD/TxD –P

3

4

Receive/Transmit data – A

Receive/Transmit data – B

DGND 5 Data ground (reference potential for VP)

*You can use this pin (1) to bypass the cable shield to the next slave

Table 2. OPTC2 bus connector signals


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6 • vacon

3.2 RS-485 OPTC8 option board

5 4 3 2 1

9 8 7 6 layout and connections

X4

X1

Bus connector Jumpers

Grounding plate

Figure 2. Vacon RS-485 option board OPTC8

Interface board connector

Signal

Shield

RxD/TxD-N

DGND

VP

RxD/TxD-P

Connector

1

3

5

6

8

Description

Cable shield

Receive/ A

Data ground (reference potential for VP)

Supply voltage – plus (5V)

Receive/ Transmit data/ B

Table 3. OPTC8 bus connector signals

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3.3 Grounding

3.3.1

Grounding by clamping the cable to the converter frame

This manner of grounding is the most effective and especially recommended when the distances between the devices are relatively short or if the device is the last device on the net.

Note: Normally, the option board has already been installed in slot D or slot E of the control board. It is not necessary to detach the whole board for the grounding of the bus cable shield. Just detach the terminal block.

1

Strip about 5 cm of the cable and cut off the grey cable shield.

Remember to do this for both bus cables (except for the last device). See pictures below.

2

Leave no more than 1 cm of the cable outside the terminal block and strip the data cables at about 0.5 cm to fit in the terminals. See pictures below.

Note: Do this for both bus cables.

Strip this part

Cut here

Figure 3.

1 2 3 4 5

A B

Figure 4.

3

Insert the data cables of both cables into terminals #3 (Line B) and #4 (Line A).

4

Strip the cable at such a distance from the terminal that you can fix it to the frame with the grounding clamp. See


3

8 • vacon

Figure 5. layout and connections

3

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3.3.2

Grounding only one point on the net

In this manner of grounding, the shield is connected to ground only at the last device on the net in the

same way as described in chapter 3.3.1. Other devices of the net just pass the shield.

We recommend you to use an Abico connector to fit the shields into the terminal.

1

2

Strip about 5 cm of the cable and cut off the grey cable shield. Remember to do this for both bus cables (except for the last device).

Leave no more than 1 cm of the cable outside the terminal block and strip the data cables at

about 0.5 cm to fit in the terminals. See Figure 6.

Note: Do this for both bus cables.

1 2 3 4 5

Shield A

3

Figure 6.

Fix both the cables on the frame with the clamp. See Figure 7.

B

Figure 7.


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10 • vacon layout and connections

3.3.3

Grounding jumper X1

The Grounding jumper X1 on the OPTC8 is used for grounding selection. If position ON is selected it means that the D-sub connector PIN1 is connected directly to ground. Selection of position OFF means that PIN1 is connected to ground via an RC-filter. Jumper X1 has no effect on OPTC2.

5 4 3 2 1

9 8 7 6

ON

OFF

Figure 8. Grounding jumper X1

X4

X1

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3.4 Bus terminal resistors

If Vacon is the last device of the fieldbus line the bus termination must be set. Use jumper X4 (ON po-

sition) or external termination resistors (e.g. in DSUB-9 connector). See Figure 9.

5 4 3 2 1

9 8 7 6

ON

OFF

X4

X1

Figure 9. Using jumper X4 to set the bus termination.


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12 • vacon layout and connections

3.5 Bus Biasing

Bus biasing is required to ensure faultless communication between devices at RS-485 bus. Bus biasing makes sure that the bus state is at proper potential when no device is transmitting. Without biasing, faulty messages can be detected when the bus is in idle state. RS-485 bus state should be neather +0,200..+7V or –0,200..-7V. Illegal bus state is <200mV..-200mV.

Number of nodes

2-5

Bias resistance

1.8 kohm

5-10

11-20

21-30

2.7 kohm

12 kohm

18 kohm

31-40 27 kohm

Table 4. Bias resistor size vs number of node

Fail safe biasing in OPTC2 option board

Connect resistor biasing resistors between pins #2 and #4 as well as pins #3 and #5 as shown in picture.

A

B

DATA-

DATA+

1

2

3

4

5

5

Matters related to this are discussed in the application note

Failsafe Biasing of Differential Buses

847.pdf) published by National Semiconductor ( www.national.com

).

(an-

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3.6 LED indications

The two LED indications next to the connector show the present statuses of the RS-485 board (yellow) and the Fieldbus Module (green).

Yellow

Green

1

2

3

4

5

X4

X1

Figure 10. LED indications on the RS-485 board

RS-485 board status LED (BS) YELLOW

LED is:

OFF

ON

Blinking fast

(once/sec)

Blinking slow

(once/5 secs)

Meaning:

Option board not activated

Option board in initialisation state waiting for activation command from the frequency converter

Option board is activated and in RUN state

• Option board is ready for external communication

Option board is activated and in FAULT state

• Internal fault of option board

Fieldbus status LED (FS) GREEN

LED is:

OFF

ON

Meaning:

Fieldbus module is waiting for parameters from the frequency converter

• No external communication

Fieldbus module is activated

• Parameters received and module activated

• Module is waiting for messages from the bus

Module is activated and receiving messages from the bus Blinking fast

(once/sec)

Blinking slow

(once/5 secs)

Module is in FAULT state

• No messages from Master within the watchdog time

• Bus broken, cable loose or Master off line


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14 • vacon

4. INSTALLATION OF VACON NX RS-485 BOARD

A Vacon NX frequency converter installation

B Remove the cable cover.

C Open the cover of the control unit.

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installation vacon • 15

D Install RS-485 option board in slot E on the control board of the frequency converter. Make sure that the grounding plate (see below) fits tightly in the clamp.

1

2

3

4

5

X4

X1

E Make a sufficiently wide opening for your cable by cutting the grid as wide as necessary.

F Close the cover of the control unit and the cable cover.


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16 • vacon modbus

5. COMMISSIONING

READ FIRST CHAPTER 8 'COMMISSIONING' IN VACON NX USER'S MANUAL (Document nr. ud00701, please visit http://www.vacon.com/925.html

).

Note! You must select Fieldbus as the active control place, if you wish to control the frequency converter through fieldbus. See Vacon NX User’s Manual, Chapter 7.3.3.1.

5.1 Fieldbus board parameters

The Vacon RS-485 board is commissioned with the control keypad by giving values to appropriate parameters in menu M7 (for locating the expander board menu see Vacon NX User's Manual, Chapter

7).

Expander board menu (M7)

The

Expander board menu

makes it possible for the user 1) to see what expander boards are connected to the control board and 2) to reach and edit the parameters associated with the expander board.

Enter the following menu level (G#) with the slots A to E with the

Browser buttons

Menu button right

. At this level, you can browse through to see what expander boards are connected. On the lowermost line of the display you also see the number of parameter groups associated with the board.

If you still press the two groups: Editable parameters and Monitored values. A further press on the

RS-485 parameters

Menu button right

takes you to either of these groups.

once you will reach the parameter group level where there are

Menu button right

To commission the RS-485 board, enter the level P7.5.1.# from the

Parameters

desired values to all RS-485 parameters (see Figure 11 and Table 5).

group (G7.5.1). Give

READY

I/Oter m

Expander Board

G1

 G5

READY

I/Oter m

Slave address

126

I/Oter m

NXOPTC5

G1

READY



G2

READY

I/Oter m

Slave address

126

READY

I/Oter m

Parameters

P1



P4

CHANGE VALUE enter CONFIRM CHANGE

Figure 11. Changing the RS-485 board commissioning parameter values

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commissioning vacon • 17

# Name

1 COMMUNICATION

PROTOCOL

2 SLAVE ADDRESS

3 BAUD RATE

4 PARITY TYPE

5 COMMUNICATION

TIMEOUT

6 OPERATE MODE

Table 5. RS-485 parameters

Default

1

1

6

0

20

1

Range

1 – Modbus RTU

2 – N2

1…247

1 – 300 baud

2 – 600 baud

3 – 1200 baud

4 – 2400 baud

5 – 4800 baud

6 – 9600 baud

7 – 19200 baud

8 – 38400 baud

0 – None

1 – Even

2 – Odd

0—OFF

1—300 s

1 – Normal

Description

Protocol

Communication speed

When N2 protocol is used must be set to 9600.

Baudrate

Describes what kind of parity checking is used. When N2-protocol is used Parity type must be set to 0 = None

See chapter Communication timeout

below

Reserved for later use

The parameters of every device must be set before connecting to the bus. Especially the parameters

Communication Protocol

,

Slave Address

and

Baud Rate

must be the same as in the master configuration.

Communication timeout

The RS-485 board initiates a communication error if communication is broken for as long as defined by the

Communication Timeout

.

Communication Timeout

is disabled when given the value 0.

Communication status

To see the present status of the RS-485 fieldbus, enter the

(G7.5.2). See Figure 12 and Table 6 below.

Comm.Status

page from

Monitor menu

READY

I/Oter m

Monitor

V1



V1

READY

I/Oter m

Comm. status

0.841

Good messages

Error messages

Figure 12. Communication status


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18 • vacon

Good messages

0…999 Number of messages received without communication errors

0…64

Error messages

Number of messages received with

CRC or parity errors

Table 6. RS-485 message indications modbus

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modbus vacon • 19

6. MODBUS

6.1 Modbus RTU protocol, introduction

The MODBUS protocol is an industrial communications and distributed control system to integrate

PLCs, computers, terminals, and other monitoring, sensing, and control devices. MODBUS is a Master-Slave communications protocol. The Master controls all serial activity by selectively polling one or more slave devices. The protocol provides for one master device and up to 247 slave devices on a common line. Each device is assigned an address to distinguish it from all other connected devices.

The MODBUS protocol uses the master-slave technique, in which only one device (the master) can initiate a transaction. The other devices (the slaves) respond by supplying the request data to the master, or by taking the action requested in the query. The master can address individual slaves or initiate a broadcast message to all slaves. Slaves return a message (‘response’) to queries that are addressed to them individually. Responses are not returned to broadcast queries from the master.

A transaction comprises a single query and single response frame or a single broadcast frame. The transaction frames are defined below.

Master's message

Slave response

START

ADDRESS

FUNCTION

DATA

CRC

END

START

ADDRESS

FUNCTION

DATA

CRC

END

Figure 13. The basic structure of a Modbus frame

Valid slave device addresses are in the range of 0 ... 247 decimal. The individual slave devices are assigned addresses in the range of 1 ... 247. A master addresses a slave by placing the slave address in the address field of the message. When the slave sends its response, it places its own address in this address field of the response to let the master know which slave is responding.

The function code field of a message frame contains two characters (ASCII) or eight bits (RTU). Valid codes are in the range of 1 ... 255 decimal. When a message is sent from a master to a slave device the function code field tells the slave what kind of action to perform. Examples are to read the ON /

OFF states of a group of discrete coils or inputs; to read the data contents of a group of registers; to


6

20 • vacon modbus read the diagnostic status of the slave; to write to designated coils or registers; or to allow loading, recording, or verifying the program within the slave.

When the slave responds to the master, it uses the function code field to indicate either a normal (error-free) response or that some kind of error occurred (called an exception response). For a normal response, the slave simply echoes the original function code. For an exception response, the slave returns a code that is equivalent to the original function code with its most significant bit set to a logic

1.

The data field is constructed using sets of two hexadecimal digits, in the range of 00 to FF hexadecimal. These can be made from a pair of ASCII characters, or from one RTU character, according to the network's serial transmission mode.

The data field of messages sent from a master to slave devices contains additional information which the slave must use to take the action defined by the function code. This can include items like discrete and register addresses, the quantity of items to be handled, and the count of actual data bytes in the field.

If no error occurs, the data field of a response from a slave to a master contains the data requested. If an error occurs, the field contains an exception code that the master application can use to determine the next action to be taken.

Two kinds of checksum are used for standard Modbus networks. The error checking field contents depend upon the transmission method that is being used.

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modbus vacon • 21

6.1.1

Supported functions

Function Code Description

03

Address range

Read Holding Registers Applies to all addresses

04

06

Read Input Registers

Write Single Register

Applies to all addresses


16 Write Multiple Registers


Note: Broadcasting can be used with codes 06 and 16

Table 7. Supported messages

6.1.1.1

Read Holding Registers

The query message specifies the starting register and the quantity of registers to be read. Registers are addressed starting with zero, i.e. registers 1 to 16 are addressed as 0 to 15.

Example of a request to read registers 42001-42003 from Slave device 1:

ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

No. of points HI

No. of points LO

CRC HI

CRC LO

01 hex

03 hex

07 hex

D0 hex

00 hex

03 hex

05 hex

46 hex

Slave address 1 hex (= 1)

Function 03 hex (= 3)

Starting address 07d0 hex (= 2000)

Number of registers 0003 hex (= 3)

CRC field 0546 hex (= 1350)

6.1.1.2


The query message specifies the starting register and the quantity of registers to be read. Registers are addressed starting with zero, i.e. registers 1 to 16 are addressed as 0 to 15.

Example of a request to read registers 32001 from Slave device 1:

ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

No. of points HI

No. of points LO

CRC HI

CRC LO

01 hex

04 hex

07 hex

D0 hex

00 hex

01 hex

31 hex

47 hex





CRC field 3147 hex (= 12615)

6.1.1.3

Preset Single Register

The query message specifies the register reference to be preset. Registers are addressed starting with zero, i.e. register 1 is addressed as 0.


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22 • vacon modbus

Example of a request to preset register 42001 to 00001hex in Slave device 1:

ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

Data HI

Data LO

CRC HI

CRC LO

01 hex Slave address 1 hex (= 1)

06 hex Function 04 hex (= 4)

07 hex


D0 hex

00 hex

Data = 0001 hex (= 1)

01 hex

48 hex CRC field 4887 hex (= 18567)

87 hex

6.1.1.4

Preset Multiple Registers

The query message specifies the register references to be preset. Registers are addressed starting with zero, i.e. register 1 is addressed as 0.

Example of a request to preset two registers starting at 42001 to 0001hex and 0010hex in Slave device

1:

ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

No. of registers HI

No. of registers LO

Byte count

Data HI

Data LO

Data HI

Data LO

CRC HI

CRC LO



07 hex


D0 hex

00 hex Number of registers 0002 hex (= 2)

02 hex

04 hex Byte count 04 hex (= 4)

00 hex

Data 1 = 0001 hex (= 1)

01 hex

00 hex

Data 2 = 0010 hex (= 16)

10 hex

88 hex CRC field 88CF hex (= 35023)

CF hex

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modbus vacon • 23

6.1.2

Exception responses

Error response is given when the Slave receives a message without communication errors, but cannot handle it. Examples of such messages are an incorrect register address, data value or unsupported message. No answer is given if a CRC or parity error occurs or the message is a broadcast message.

Code Function

01 ILLEGAL FUNCTION

Description

The message function requested is not recognized by the slave.

02 ILLEGAL DATA AD-

DRESS

The received data address is not an allowable address for the slave

03

06

ILLEGAL DATA VALUE

SLAVE DEVICE BUSY

The received data value is not an allowable value for the slave.

The message was received without error but the slave was engaged in processing a long duration program command.

Table 8. Exception response codes

Example of an exception response

In an exception response, the Slave sets the most-significant bit (MSB) of the function code to 1. The

Slave returns an exception code in the data field.

Command Master – Slave:

ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

No. of registers HI

No. of registers LO

CRC HI

CRC LO



17 hex Starting address 1770 hex (= 6000)

70 hex

00 hex Invalid number of registers 0005 hex (= 5)

05 hex

34 hex

66 hex CRC field 3466 hex (= 13414)

Message frame:

01 04 17 70 00 05 34 66


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24 • vacon

Exception response.

Answer Slave – Master:

ADDRESS

FUNCTION

ERROR CODE

ERROR

CHECK

CRC HI

CRC LO

Reply frame:

01 14 02 AE C1


14 hex Most significant bit set to 1

02 hex Error code 02 => Illegal Data Address

AE hex CRC field AEC1 hex (= 44737)

C1 hex modbus

6

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modbus vacon • 25

6.2 Modbus interface

Features of the Modbus-Vacon NX interface:

• Direct control of Vacon NX ( e.g. Run, Stop, Direction, Speed reference, Fault reset)

• Full access to all Vacon NX parameters

• Monitor Vacon NX status (e.g. Output frequency, Output current, Fault code)

6.2.1

Modbus registers

The Vacon variables and fault codes as well as the parameters can be read and written from Modbus.

The parameter addresses are determined in the application. Every parameter and actual value have been given an ID number in the application. The ID numbering of the parameter as well as the parameter ranges and steps can be found in the application manual in question. The parameter value shall be given without decimals. If several parameters/actual values are read with one message, the adresses of the parameters/actual values must be consecutive.

All values can be read with function codes 3 and 4 (all registers are 3X and 4X reference). Modbus registers are mapped to drive ID’s as follows:

ID

1 … 98

99

101… 1999

2001…2099

2101…2199

Table 9. Index table

Modbus register Group

40001…40098 (30001…30098) Actual Values

40099 (30099) Fault Code

40101…41999 (30101…31999) Parameters

42001…42099 (32001…32099) Process Data In

42101…42199 (32101…32199) Process Data Out

R/W

30/1

30/1

30/1

20/20

20/20

6.2.2

Process data

The process data fields are used to control the drive (e.g. Run, Stop , Reference, Fault Reset) and to quickly read actual values (e.g. Output frequency, Output current, Fault code). The fields are structured as follows:

Process Data Slave -> Master (max 22 bytes)

ID Modbus register Name

2101 32101, 42101 FB Status Word

2102 32102, 42102

2103 32103, 42103

Range/Type

Binary coded

FB General Status Word Binary coded

FB Actual Speed 0…10000 %

2104 32104, 42104

2105 32105, 42105

2106 32106, 42106

2107 32107, 42107

FB Process Data Out 1




See appendix 1

See appendix 1

See appendix 1

See appendix 1

2108 32108, 42108

2109 32109, 42109

2110 32110, 42110

2111 32111, 42111





See appendix 1

See appendix 1

See appendix 1

See appendix 1

Table 10.


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26 • vacon modbus

Process Data Master -> Slave (max 22 bytes)

ID Modbus register Name

2001 32001, 42001 FB Control Word

2002 32002, 42002

2003 32003, 42003

2004 32004, 42004

2005 32005, 42005

FB General Control Word

FB Speed Reference

FB Process Data In 1


Range/Type

Binary coded

Binary coded

0…10000 %

Integer 16

Integer 16

2006 32006, 42006

2007 32007, 42007

2008 32008, 42008

2009 32009, 42009

2010 32010, 42010

2011 32011, 42011







Integer 16

Integer 16

Integer 16

Integer 16

Integer 16

Integer 16

Table 11.

The use of process data depends on the application. In a typical situation, the device is started and stopped with the ControlWord (CW) written by the Master and the Rotating speed is set with Reference (REF). With PD1…PD8 the device can be given other reference values (e.g. Torque reference).

With the StatusWord (SW) read by the Master, the status of the device can be seen. Actual Value (ACT) and PD1…PD8 show the other actual values.

6.2.3

Process data in

This register range is reserved for the control of the frequency converter.

Process data in

range ID 2001…2099. The registers are updated every 10 ms. See Table 12.

is located in

ID Modbus register

2001 32001, 42001

2002 32002, 42002

2003 32003, 42003

2004 32004, 42004

2005 32005, 42005

2006 32006, 42006

2007 32007, 42007

2008 32008, 42008

2009 32009, 42009

2010 32010, 42010

2011 32011, 42011

Table 12. Fieldbus basic input table

Name

FB Control Word

FB General Control Word

FB Speed Reference









Range/Type

Binary coded

Binary coded

0…10000 %

Integer 16

Integer 16

Integer 16

Integer 16

Integer 16

Integer 16

Integer 16

Integer 16

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modbus vacon • 27

6.2.3.1

Control word

15

-

14

-

13

-

12

-

11

-

10

-

9

-

8

-

7

-

6

-

5

-

4

-

3

-

2 1 0

RST DIR RUN

In Vacon applications, the three first bits of the control word are used to control the frequency converter. However, you can customise the content of the control word for your own applications because the control word is sent to the frequency converter as such.

Bit

Value = 0

0

1

2

3….15

Table 13. Control word bit descriptions

Description

Value = 1

Stop

Clockwise

Run

Counterclockwise

Rising edge of this bit will reset active fault

Not in use Not in use

6.2.3.2

Speed reference

15

MSB

14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

LSB

This is the Reference 1 to the frequency converter. Used normally as Speed reference.

The allowed scaling is –10000...10000. In the application, the value is scaled in percentage of the frequency area between the set minimum and maximum frequencies.

6.2.3.3

Process data in 1 to 8

Process Data In values 1 to 8 can be used in applications for various purposes. Update rate is 10 ms for all values. See Vacon NX Application Manual for usage of these data values.

6.2.4

Process data out

This register range is normally used to fast monitoring of the frequency converter. located in range ID 2101…2199. See Table 14.

Process data out

is

ID

2101

2102

Modbus register Name

32101, 42101 FB Status Word

32102, 42102 FB General Status Word

Range/Type

Binary coded

Binary coded

2103

2104

2105

2106

2107

2108

2109

2110

2111

32103, 42103

32104, 42104

32105, 42105

32106, 42106

32107, 42107

32108, 42108

32109, 42109

32110, 42110

32111, 42111

Table 14. Fieldbus basic output table

FB Actual Speed

FB Process Data Out1








0…10000 %

See appendix 1

See appendix 1

See appendix 1

See appendix 1

See appendix 1

See appendix 1

See appendix 1

See appendix 1


6

6

28 • vacon modbus

6.2.4.1

Status word

15

-

14

-

13

-

12

-

11 10

- UVFS

9

DDI

R

8

TCSPDL

7

FR

6

Z

5

ARE

F

4

W

3 2 1 0

FLT DIR RUN RDY

Information about the status of the device and messages is indicated in the

Status word

. The

Status word

is composed of 16 bits that have the following meanings:

Bit

0

5

6

7

8

1

2

3

4

9

10

11...15

Value = 0

Not Ready

-

-

STOP

Clockwise

Ref. frequency not reached

-

Flux Not Ready

TC Speed Limit Active

Detected Encoder Direction Clockwise

UV Fast Stop Active

Not In use

Table 15. Status word bit descriptions

Description

Value = 1

Ready

RUN

Counterclockwise

Faulted

Warning

Ref. Frequency reached

Motor is running at zero speed

Flux Ready

TC Speed Limit Not Active

Encoder Direction Counterclockwise

UV Fast Stop Not Active

Not In use

6.2.4.2

General status word

15 14

I/O PANEL

13

FB

12

-

11 10

- -

9

-

8

-

7

-

Bit

0...12

13

14

15

Not in use

Description

Fieldbus control, (1 = FB control active)

Panel control, (1 = Panel control active)

I/O Control, (1 = I/O control active)

Table 16. General status word bit descriptions

6

-

5

-

4

-

3

-

2

-

1

-

0

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modbus vacon • 29

6.2.4.3

Actual speed

15

MSB

14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

LSB

This is the reference 1 to the frequency converter. Used normally as Speed reference.

The allowed scaling is –10000...10000. In the application, the value is scaled in percentage of the frequency area between set minimum and maximum frequency.

6.2.4.4

Process data out 1 to 8

Process Data Out values 1 to 8 can be used in application for various purposes. Update rate is 10ms

for all values. See APPENDIX 1 for usage of these values.


6

30 • vacon modbus

6.2.5

Parameters

The parameter addresses are determined in the application. Every parameter has been given an ID number in the application. The ID numbering of the parameter as well as the parameter ranges and steps can be found in the application manual in question. The parameter value shall be given without decimals. The following functions can be activated with parameters:

Function code Function

03

04

06

16

Read Holding Registers


Preset Single Register

Preset Multiple

Registers

Modbus Address

30101…31999

40101…41999

40101…41999

40101…41999

Parameter ID’s

101-1999

101-1999

101-1999

101-1999

Table 17. Parameters

6.2.6

Actual values

The actual values as well as parameter addresses are determined in the application. Every actual value has been given an ID number in the application. The ID numbering of the actual values as well as the value ranges and steps can be found in the application manual in question. The following functions can be activated with parameters:

Function code Function

03 Read Holding Registers

Actual values

30001-30098

04 Read Input Registers 40001-40098

Table 18. Actual values

6

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modbus vacon • 31

6.2.7

Example messages

Example 1

Write the process data 42001…42003 with command


ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

No. of registers HI

No. of registers LO

Byte count

Data HI

Data LO

Data HI

Data LO

Data HI

Data LO

CRC HI

CRC LO

16

(Preset Multiple Registers).



07 hex


D0 hex


03 hex

06 hex Byte count 06 hex (= 6)

00 hex

Data 1 = 0001 hex (= 1). Setting con-

01 hex

00 hex Data 2 = 0000 hex (= 0). General con-

00 hex trol word 0.

13 hex Data 3 = 1388 hex (= 5000), Speed Reference to

88 hex 50.00%

C8 hex CRC field C8CB hex (= 51403)

CB hex trol word run bit to 1.

Message frame:

01 10 07 D0 00 03 06 00 01 00 00 13 88 C8 CB

The reply to Preset Multiple Registers message is the echo of 6 first bytes.


ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

No. of registers HI

No. of registers LO

CRC HI

CRC LO

01 hex

10 hex

07 hex

D0 hex

00 hex

03 hex

F1 hex

01 hex





CRC F101 hex (= 61697)

Reply frame:

01 10 07 D0 00 03 F1 01


6

6

32 • vacon modbus

Example 2

Read the Process Data 42103…42104 with command

4

(Read Input Registers) .


ADDRESS

FUNCTION

DATA

ERROR

CHECK

Starting ddress HI

Starting address LO

No. of registers HI

No. of registers LO

CRC HI

CRC LO



08 hex Starting address 0836 hex (= 2102)

36 hex


02 hex

93 hex

A5 hex CRC field B321 hex (= 45857)

Message frame:

01 04 08 36 00 02 93 A5

The reply to the Read Input Registers message contains the values of the read registers.


ADDRESS

FUNCTION

DATA

ERROR

CHECK

Byte count

Data HI

Data LO

Data HI

Data LO

CRC HI

CRC LO

01 hex

04 hex

02 hex

13 hex

88 hex

09 hex

C4 hex

F0 hex

E9 hex



Byte count 4 hex (= 4)

Speed reference = 1388 hex (=5000 => 50.00%)

Output Frequency = 09C4 hex (=2500 =>25.00Hz)

CRC field B321 hex (= 45857)

Reply frame:

01 04 02 13 88 09 C4 F0 E9

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modbus vacon • 33

6.3 Start-up test

Frequency converter application

Choose Fieldbus (Bus/Comm) as the active control place (see Vacon NX User's Manual, Chapter

7.3.3).

Master software

1. Set

2. Frequency converter status is RUN.

3. Set

5. Set

FB Control Word

FB Speed Reference

4. The Actual value is 5000 and the frequency converter output frequency is 25,00 Hz.

FB Control Word

(MBaddr 42001) value to 1hex.

(MBaddr 42003) value to 5000 (=50,00%).

(MBaddr 42001) value to 0hex.

6. Frequency converter status is STOP.

If FB Status Word (Addr 42101) bit 3 = 1 Status of frequency converter is FAULT.


6

7

34 • vacon metasys n2

7. METASYS N2

7.1 Metasys N2 Protocol Introduction

The N2 communications protocol is used by Johnson Controls and others to connect terminal unit controllers to supervisory controllers. It is open to any manufacturer and based upon a simple ASCII protocol widely used in the process control industry.

The physical characteristics of the N2 bus are three wire RS-485 with a maximum of 100 devices over a 4,000 foot distance running at 9,600 bps. Logically, the N2 is a master-slave protocol, the supervisory controller normally being the master. Data is partitioned into common HVAC control objects, such as analogue input, analogue output, binary input and binary output. N2 messaging supports the reading, writing and overriding of these points. Additionally, there are messages defined to perform uploads and downloads of devices as well as direct memory reads and writes.

7.2 Metasys N2 interface

Features of the N2 Interface:

• Direct control of Drive ( e.g. Run, Stop, Direction, Speed reference, Fault reset)

• Full access to necessary parameters

• Monitor Drive status (e.g. Output frequency, Output current, Fault code )

• In standalone operation, or should the polling stop, the overridden values are released after a specified period (about 10 minutes).

7.2.1

Analogue Input (AI)

All Analogue Input (AI) points have the following features:

• Support Change of State (COS) reporting based on high and low warning limits.

• Support Change of State (COS) reporting based on high and low alarm limits.

• Support Change of State (COS) reporting based on override status.

• Always considered reliable and never out of range.

• Writing of alarm and warning limit values beyond the range that can be held by the drive’s internal variable will result in having that limit replaced by the “Invalid Float” value even though the message is acknowledged. The net result will be the inactivation of the alarm or warning

(the same as if the original out of range value was used).

• Overriding is supported from the standpoint that the “Override Active” bit will be set and the value reported to the N2 network will be the overridden value. However, the value in the drive remains unchanged. Therefore, the N2 system should be set up to disallow overriding AI points or have an alarm condition activated when an AI point is overridden.

• Overriding an AI point with a value beyond the limit allowed by the drive’s internal variable will result in an “Invalid Data” error response and the override status and value will remain unchanged.

7.2.2

Binary Input (BI)

All Binary Input (BI) points have the following features:

• Support Change of State (COS) reporting based on current state.

• Support Change of State (COS) reporting based on alarm condition.


• Always considered reliable.

Overriding is supported from the standpoint that the “Override Active” bit will be set and the value reported to the N2 network will be the overridden value. However, the value in the drive remains un-

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metasys n2 vacon • 35 changed. Therefore, the N2 system should be set up to disallow overriding BI points or have an alarm condition activated when a BI point is overridden.

7.2.3

Analogue Output (AO)

All Analogue Output (AO) points have the following features:



• Overriding of the AO points is the method used to change a value. Overriding an AO point with a value beyond the limit allowed by the drive’s internal variable will result in an ”Invalid Data” error response and the override status and value will remain unchanged. If the overridden value is beyond the drive’s parameter limit but within the range that will fit in the variable, an acknowledge response is given and the value will be internally clamped to its limit.

• An AO point override copies the override value to the corresponding drive parameter. This is the same as changing the value on the keypad. The value is non-volatile and will remain in effect when the drive is turned off and back on. It also remains at this value when the N2 network "releases" the point. The N2 system always reads the current parameter value.

Note:

On some N2 systems, the system will not poll the AO point when it is being overridden. In this case, the N2 system will not notice a change in value if the change is made with the keypad. To avoid this, set the point up as a ”local control” type and release it once it has been overridden. In this way, the N2 system will monitor the value when not being overridden.

7.2.4

Binary Output (BO)

All Binary Output (BO) points have the follwoing features:



• Overriding BO points control the drive. These points are input commands to the drive. When released, the drive's internal value remains at its last overridden value.

7.2.5

Internal Integer (ADI)

All Internal Integer (ADI) points have the follwoing features:

• Do not support Change of State (COS) reporting.

• Can be overridden and the ”Override Active” bit will be set. However, the Internal value is unchanged (Read Only).


7

7


7.3 N2 POINT MAP

7.3.1

Analogue Inputs (AI)

AI

AI

AI

AI

AI

AI

NPT NPA Description

AI 1 Speed Setpoint

AI 2 Output Speed

AI

AI

AI

3

4

5

Motor Speed

Load (power)

Megawatt Hours

AI

AI

AI

AI

6

7

8

9

10

11

12

13

14

15

Motor Current

Bus Voltage

Motor Volts

Heatsink Temperature ° C

Motor Torque %

Operating Days (trip) Day

Operating Hours (trip)

Kilowatt Hours (trip)

Torque Reference 1)

Motor Temperature

Rise 1)

Units

Hz

Hz

Rpm

%

MWh

A

V

V

Hour kWh

%

%

AI

AI

AI

AI

AI

AI

AI

AI

16

17

18

19

20

21

22

23

FBProcessDataOut1

FBProcessDataOut2

FBProcessDataOut3

FBProcessDataOut4

FBProcessDataOut5

FBProcessDataOut6

FBProcessDataOut7

FBProcessDataOut8

2)

2)

2)

2)

2)

2)

2)

2)

-32768 to

+32767

-32768 to

+32767

-32768 to

+32767

-32768 to

+32767

-32768 to

+32767

-32768 to

+32767

-32768 to

+32767

-32768 to

+32767

Table 19.

Note

2 decimals

2 decimals

0 decimal

1 decimal

Total Counter

2 decimal

0 decimal

1 decimal

0 decimal

1 decimal

0 decimal

0 decimal

Trip Counter

1 decimal

1 decimal

0 decimal

0 decimal

0 decimal

0 decimal

0 decimal

0 decimal

0 decimal

0 decimal

1) Torque Reference (AI-14) and Motor Temperature Rise (AI-15) NOT supported in NXL

2) These analogue inputs are application specific.

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metasys n2

7.3.2

7.3.3 vacon • 37

Binary Inputs (BI)

BI

BI

BI

BI

BI

BI

BI

NPT NPA Description

BI

BI

BI

BI

1

2

3

4

Ready

Run

Direction

Faulted

BI

BI

BI

BI

5

6

7

8

9

10

11

12

13

14

15

Table 20.

Warning

Ref. Frequency reached

General 0

General 1

General 2

General 3

3)

3)

3)

3)

General 4 3)

General 5 3)

General 6

General 7

3)

3)

0 =

Not Ready

Stop

Clockwise Counterclockwise

Not Faulted Faulted

Not Warning

False

Motor running zero speed False

0

0

0

0

0

0

0

0

1 =

Ready

Run

Warning

True

True

1

1

1

1

1

1

1

1

3) These binary inputs are application specific. They are read from the drives General Status

Word.

Analogue Outputs (AO)

NPT NPA Description

AO

AO

1

2

Comms Speed

Current Limit

AO

AO

AO

AO

AO

AO

AO

3

4

5

6

7

8

9

AO 10

Table 21.

Units

%

A

Minimum Speed

Maximum Speed

Accel Time

Decel Time

Hz

Hz s s

FBProcessDataIN 1 4)

FBProcessDataIN 2 4)

-32768 to +32767

-32768 to +32767

FBProcessDataIN 3 4) -32768 to +32767

FBProcessDataIN 4 4) -32768 to +32767

4) These Analogue Outputs are application specific.

Note

2 decimals

2 decimals

2 decimals

2 decimals

1 decimal

1 decimal

2 decimals

2 decimals

2 decimals

2 decimals


7

38 • vacon

7.3.4

7.3.5

Binary Outputs (BO)

BO

BO

BO

BO

BO

BO

BO

NPT NPA Description

BO

BO

BO

BO

1

2

3

4

Comms Start/Stop

Comms Forward/Reverse

0 =

Stop

Forward

Reset Fault N/A

FBFixedControlWord Bit_3 5) -

5

6

7

8

9

10

11

FBFixedControlWord Bit_4 5)


FBFixedControlWord Bit_6

5)

5)





-

-

-

-

-

-

-

BO

BO

12

13


5)


5)

-

-

BO 14

-

BO

BO

15

16


5)


5)


5)

-

-

Table 22.

5) These Binary Outputs are application specific.

Internal Integers (ADI)

NPT NPA

ADI 1

Table 23.

Description

Active Fault Code

Units

-

-

-

-

-

-

-

-

-

-

-

-

1 =

Start

Reverse

Reset

-

- metasys n2

7

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metasys n2 vacon • 39

8. FAULT TRACKING

The table below presents the faults related to the RS-485 option board. For more information, see also Vacon NX User's Manual, Chapter 9.

The RS-485 option board status LEDs have been described in more detail in Chapter 3.6.

Correcting measures Fault code

Fault Possible cause

37 Device change Option board changed.

38 Device added Option board added.

39 Device removed Option board removed.

40 Device unUnknown option board. known

53 Fieldbus fault The data connection between the Modbus/

N2 Master and the RS-485 option board is broken

54 Slot fault Defective option board or slot

Reset

Reset

Reset

Check the installation.

If installation is correct contact the nearest Vacon distributor.

Check the board and slot.

Contact the nearest Vacon distributor.

Table 24. RS-485 option board faults

You can define with parameters how the frequency converter shall react to certain faults:

Code Parameter Min Max Unit Step Default ID

P2.7.23

Response to slot fault

0

0

3

3

1

1

0

0

733

734

Note

0=No response

1=Warning

2=Fault,stop acc. to 2.4.7

3=Fault,stop by coasting

0=No response

1=Warning

2=Fault,stop acc. to 2.4.7

3=Fault,stop by coasting

Table 25. Frequency converter responses to faults


7

7


APPENDIX 1

Process Data OUT (Slave to Master)

The Fieldbus Master can read the frequency converter’s actual values using process data variables.

Basic, Standard, Local/Remote Control, Multi-Step Speed Control, PID control and Pump and fan control

applications use process data as follows:

ID

2104

2105

2106

2107

2108

2109

2110

2111

Data Value

Process data OUT 1 Output Frequency

Process data OUT 2 Motor Speed

Process data OUT 3 Motor Current

Process data OUT 4 Motor Torque

Process data OUT 5 Motor Power

Process data OUT 6 Motor Voltage

Process data OUT 7 DC link voltage

Process data OUT 8 Active Fault Code

Table 26. Process data OUT variables

Unit Scale

Hz 0,01 Hz rpm 1 rpm

A

%

%

V

V

-

0,1 A

0,1 %

0,1 %

0,1 V

1 V

-

The

Multipurpose Control application

has a selector parameter for every Process Data. The monitoring values and drive parameters can be selected using the ID number (see NX All in One Application

Manual, Tables for monitoring values and parameters). Default selections are as in the table above.

Process Data IN (Master to Slave)

ControlWord, Reference and Process Data are used with All-inOne applications as follows:

Basic, Standard, Local/Remote Control and Multi-Step Speed Control applications

ID

2003

2001

2004–2011

Table 27.

Data

Reference

Value

Speed Reference

ControlWord Start/Stop Command

Fault reset Command

PD1 – PD8 Not used

Unit Scale

% 0.01%

- -

- -

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metasys n2

Multipurpose Control application

ID

2003

2001

2004

2005

2006–2011

Table 28.

Data

Reference

Value

Speed Reference


Fault reset Command

-

Process Data IN1 Torque Reference %

Process Data IN2 Free Analogia INPUT %

PD3 – PD8 Not Used -

Unit Scale

% 0.01%

-

0.1%

0.01%

-

PID control and Pump and fan control applications

ID

2003

2001

2004

2005

2006

2007–2011

Table 29

Data

Reference

Value

Speed Reference


Fault reset Command

Process Data IN1 Reference for PID controller

Process Data IN2 Actual Value 1 to PID controller

Process Data IN3 Actual Value 2 to PID controller

PD4–PD8 Not Used

Unit Scale

% 0.01%

- -

%

%

%

-

0.01%

0.01%

0.01%

- vacon • 41


7

Find your nearest Vacon office on the Internet at: www.vacon.com

Manual authoring: [email protected]

Vacon Plc.

Runsorintie 7

65380 Vaasa

Finland

Subject to change without prior notice

© 2012 Vacon Plc.

Document ID:

Rev. A

Danfoss VACON NXP Air cooled User manual

Assistant Bot

vacon nx ac drives optc2/c8 modbus/n2 option board user manual

Internal components and circuit boards are at high potential when the frequency converter is connected to the power source. This voltage is extremely dangerous and may cause death or severe injury if you come into contact with it.

Grounding by clamping the cable to the converter frame

Grounding only one point on the net

Grounding jumper X1

Failsafe Biasing of Differential Buses

Expander board menu

Browser buttons

Menu button right

Menu button right

Menu button right

Parameters

Communication Protocol

Slave Address

Baud Rate

Communication Timeout

Communication Timeout

Comm.Status

Monitor menu

Monitor

Comm. status

Supported functions

6.1.1.1

Read Holding Registers

6.1.1.2

Read Input Registers

6.1.1.3

Preset Single Register

6.1.1.4

Preset Multiple Registers

Exception responses

Modbus registers

Process data

Process Data Slave -> Master (max 22 bytes)

Process Data Master -> Slave (max 22 bytes)

Process data in

Process data in

6.2.3.1

Control word

Value = 0

Value = 1

6.2.3.2

Speed reference

6.2.3.3

Process data in 1 to 8

Process data out

Process data out

6.2.4.1

Status word

Status word

Status word

Value = 0

Value = 1

6.2.4.2

General status word

6.2.4.3

Actual speed

6.2.4.4

Process data out 1 to 8

Parameters

Actual values

Example messages

Example 1

16

Example 2

4

FB Control Word

FB Speed Reference

FB Control Word

If FB Status Word (Addr 42101) bit 3 = 1 Status of frequency converter is FAULT.

Analogue Input (AI)

Binary Input (BI)

Analogue Output (AO)

Binary Output (BO)

Internal Integer (ADI)

Analogue Inputs (AI)

Binary Inputs (BI)

Analogue Outputs (AO)