BONFIGLIOLI Vectron ACTIVE, ACTIVE Cube User Manual

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ACTIVE and ACTIVE Cube

Modbus communication with CM-232/CM-485/CM-485T Frequency Inverter 230 V / 400 V

General Information about the Documentation

The present supplement of the operating instructions refers to the frequency inverters

of the ACT and ACU line. It contains necessary information for installation and use of the communication modules CM-232 and CM-485.

In order to make it as easy as possible for the user to find his/her way through the

documentation, it is structured according to the customer-specific demands made of the frequency inverter.

Brief Instructions The Brief Instructions describe the basic steps required for mechanical and electrical

installation of the frequency inverter. The

guided commissioning supports you in the selection of necessary parameters and the configuration of the frequency inverter by the software.

Operating Instructions The Operating Instructions describe and document all functions of the frequency in-

verter. The parameters required for adapting the frequency inverter to specific applications as well as the wide range of additional functions are described in detail.

Application Manual

The Application Manual contains additional information facilitating the installation and commissioning of the frequency inverter, i.e. information on the different issues relating to the specific application realized by the frequency inverter.

Installation Instructions Complementing the Brief Instructions and the Operating Instructions, the Installation

Instructions provide information on how to install and use the additional/optional components.

If you need a copy of the documentation or additional information, contact your local

representative of BONFIGLIOLI.

The following pictograms and signal words are used in the documentation:

Danger!

Danger refers to an immediate threat. Non-compliance with the precaution described will result in death, serious injury or material damage.

Warning!

Warning refers to a possible threat. Non-compliance with the warning may result in death, serious injury or material damage.

Caution!

Caution refers to an immediate hazard. Non-compliance may result in personal or material damage.

Attention!

Attention and the related text refer to a possible behavior or an undesired condition which can occur during operation.

Note

Note and the related text provide useful information which supplements the corresponding part of the documentation.

Modbus Instruction manual 105/08

Warning! The specifications and instructions contained in the documentation must

be complied with strictly during installation and commissioning. Only qualified staff who has read the documentation and, in particular, the safety instructions carefully is allowed to carry out installation or commissioning work or to operate the frequency inverters. The term „Qualified Staff“ refers to anybody who is familiar with the installation, assembly, commissionin

g and operation of the frequency inverter and has the

proper qualification for the job.

Modbus Instruction manual 05/082

TABLE OF CONTENTS

1 General Safety Instructions and Information on Use.................................................... 5

1.1 General Information ................................................................................................ 5

1.2 Purpose of the Frequency Inverters ........................................................................ 5

1.3 Transport and Storage ............................................................................................. 6

1.4 Handling and Installation ........................................................................................ 6

1.5 Electrical Connection ............................................................................................... 6

1.6 Information on Use.................................................................................................. 7

1.7 Maintenance and Service......................................................................................... 7

2 Introduction ................................................................................................................... 8

3 Installation/Disassembly of the communication module.............................................. 9

3.1 Installation .............................................................................................................. 9

3.2 Disassembly ........................................................................................................... 10

4 Plug Assignment/Bus Termination/Cable ................................................................... 11

4.1 RS232 module CM-232 .......................................................................................... 11

4.2 RS485 module........................................................................................................ 12

4.2.1 RS485 module CM-485 DB9.................................................................................... 12

4.2.2 RS485 module CM-485 T........................................................................................ 12

4.2.3 Bus termination ..................................................................................................... 13

5 Startup ......................................................................................................................... 14

5.1 General Information on configuration .................................................................. 14

5.2 RS232 Module CM-232 .......................................................................................... 16

5.2.1 Setting the Modbus Baud Rate and Parity ................................................................ 16

5.2.2 Setting the Modbus Address ................................................................................... 16

5.3 RS485 Module CM-485 .......................................................................................... 17

5.3.1 Setting the Modbus Baud Rate and Parity ................................................................ 17

5.3.2 Setting the Modbus Node Address........................................................................... 17

6 Modbus over Serial Line Protocol................................................................................. 18

6.1 Master/Slaves Protocol Principle .......................................................................... 18

6.2 Addressing Rules ................................................................................................... 19

6.3 Message Description .............................................................................................. 19

6.4 Supported Function Codes..................................................................................... 20

6.4.1 Function Code 3, Read 16-bit Parameter.................................................................. 20

6.4.2 Function Code 6, Write 16-bit Parameter ................................................................. 22

6.4.3 Function Code 100, Read 32-bit Parameter ..............................................................23

6.4.4 Function Code 101, Write 32-bit Parameter.............................................................. 24

6.4.5 Function Code 8, Diagnostics.................................................................................. 25

6.5 Exception Responses ............................................................................................. 27

6.6 Exception Codes .................................................................................................... 27

6.7 The two serial Transmission Modes....................................................................... 29

6.7.1 RTU Transmission.................................................................................................. 29

6.7.1.1 Character Format ............................................................................................ 29

6.7.1.2 Frame Description ........................................................................................... 29

Modbus Instruction manual 305/08

6.7.1.3 Modbus Message RTU Framing......................................................................... 30

6.7.1.4 CRC Checking .................................................................................................30

6.7.2 ASCII Transmission................................................................................................ 33

6.7.2.1 Character Format ............................................................................................ 33

6.7.2.2 Modbus Message ASCII Framing....................................................................... 33

6.7.2.3 LRC Checking.................................................................................................. 34

6.8 Monitoring Timing Function .................................................................................. 35

6.9 Watchdog............................................................................................................... 35

7 Handling of Data Sets/Cyclic Writing .......................................................................... 36

8 Modbus Message Examples.......................................................................................... 38

8.1 Modbus RTU-Message Examples ........................................................................... 38

8.1.1 Function Code 3, Read 16-bit Parameter.................................................................. 38

8.1.2 Function Code 6, Write 16-bit Parameter ................................................................. 39

8.1.3 Function Code 100, Read 32-bit Parameter ..............................................................40

8.1.4 Function Code 101, Write 32-bit Parameter.............................................................. 41

8.1.5 Function Code 8, Diagnostics.................................................................................. 42

8.2 Modbus ASCII-Message Examples ........................................................................ 43

8.2.1 Function Code 3, Read 16-bit Parameter.................................................................. 43

8.2.2 Function Code 6, Write 16-bit Parameter ................................................................. 44

8.2.3 Function Code 100, Read 32-bit Parameter ..............................................................45

8.2.4 Function Code 101, Write 32-bit Parameter.............................................................. 46

8.2.5 Function Code 8, Diagnostics.................................................................................. 47

9 ACT Inverter Control/Reference Value........................................................................ 48

9.1 Control ................................................................................................................... 50

9.1.1 Control via Contacts............................................................................................... 50

9.1.2 Control via Control Word of Statemachine................................................................ 53

9.1.2.1 Behavior in Case of Quick Stop......................................................................... 58

9.1.2.2 Behavior in state-transition 5............................................................................ 59

9.1.3 Control via Remote Contacts................................................................................... 60

9.2 Reference Value..................................................................................................... 63

9.2.1 Reference Frequency ............................................................................................. 63

9.2.2 Reference Percentage ............................................................................................ 65

10 ACU Inverter Control/Reference Value........................................................................ 66

10.1 Control via contacts/remote contacts................................................................ 68

10.2 Control via state machine................................................................................... 71

10.2.1 Behavior in quick stop............................................................................................ 74

10.2.2 Behavior in transition 5 .......................................................................................... 75

10.2.3 Reference value/actual value .................................................................................. 76

11 Parameter List.............................................................................................................. 78

11.1 Actual Value Menu (VAL).................................................................................... 78

11.2 Parameter Menu (PARA) .................................................................................... 78

12 Annex ........................................................................................................................... 80

12.1 Warning Messages.............................................................................................. 80

12.2 Error Messages ................................................................................................... 81

12.3 ASCII Tabelle (0x00 – 0x7F) .............................................................................. 83

Modbus Instruction manual 05/084

1 General Safety Instructions and Information on Use

The present documentation was prepared with great care and it was subjected to extensive and repeated reviews. For reasons of clarity, it was not possible to include all details of all types of the product in the documentation. Neither was it possible to consider all conceivable installation, operation or maintenance situations. If you require further information or if you meet with specific problems which are not dealt with in sufficient detail in the documentation, contact your local BONFIGLIOLI a We would also like to point out that the contents of this documentation do not form part of any previous or existin are they intended to supplement or replace such agreements, assurances or legal relationships. The manufacturer's obligations are exclusively specified in the relevant purchase contract. This contract also contains all and any warranty regulations which may apply to the relevant scope of supply. These contractual warranty provisions are neither extended nor limited by the specifications contained in this documentation. The manufacturer reserves the right to correct or amend the specifications, product information and omissions in these operating instructions without notice. The manufacturer shall not be liable for any damage, injuries or costs which may be caused by the aforementioned reasons.

1.1 General Information

gent.

g agreement, assurance or legal relationship. Neither

Warning!

The DC-link circuit of the frequency inverter is charged during operation,

i.e. there is always the risk of contact with high voltage. Frequency inverters are used for drivin surface during operation. Any unauthorized removal of the necessary covers, improper use, wron installation or operation may result in serious injuries or material damage. In order to avoid such in out the transport, installation, setup or maintenance work required. The standards EN 50178, IEC 60364 (Cenelec HD 384 or DIN VDE 0100), IEC 60664-1 (Cenelec HD 625 or VDE 0110-1), BGV A2 (VBG 4) as well as the applicable national regulations must be complied with. The term „Qualified Staff“ refers to anybody who is familiar with the installation, assembly, commissionin possible hazards and has the proper qualification for the job.

1.2 Purpose of the Frequency Inverters

Warning!

The frequency inverters are electrical drive components intended for installation in industrial plants or machines. Commissioning and start of operation is not allowed until it has been verified that the machine meets the requirements of the EC Machinery Directive 98/37/EEC and EN 60204. In accordance with the CE markin comply with the Low Voltage Directive 72/23/EEC as well as EN 50178 / DIN VDE 0160 and EN 61800-2. The user shall be responsible for making sure that the requirements of the EMC Directive 89/336/EEC are met. Frequency inverters are only available at specialized dealers and are exclusively intended for professional use as per EN 61000-3-2.

The frequency inverters are also marked with the UL label according to UL508c, which proves that they also meet the requirements of the CSA Standard C22.2-No. 14-95. The technical data, connection specifications and information on ambient conditions are indicated on the name plate and in the documentation and must be complied with in any case. Anyone involved in any kind of work at the device must have read the instructions carefully and understood them before starting the work.

g moving parts and they may become hot at the

juries or damage, only qualified staff may carry

g and operation of the frequency inverter as well as the

g requirements, the frequency inverters

Modbus Instruction manual 505/08

1.3 Transport and Storage

The frequency inverters must be transported and stored in an appropriate way. During transport and storage the devices must remain in their original packaging. The units may only be stored in dry rooms which are protected against dust and moisture and are exposed to little temperature deviations only. Observe the climatic conditions according to EN 50178 and the markin for more than one year without connecting them to the rated mains voltage.

1.4 Handling and Installation

Warning!

The frequency inverters are to be used in accordance with the documentation as well as the applicable directives and standards. They must be handled carefully and protected against mechanical stress. Do not bend any components or chan distances. Do not touch electronic components or contacts. The devices are equipped with components which are sensitive to electrostatic energy and can easily be damaged if handled improperly. Any use of dama considered as a non-compliance with the applicable standards. Do not remove any warning signs from the device.

Damaged or destroyed components must not be put into operation because they may be a health hazard.

1.5 Electrical Connection

Warning!

When workin A2 (VBG 4), VDE 0100 and other national directives. Comply with the electrical installation instructions given in the documentation as well as the relevant directives. Responsibility for compliance with and examination of the limit values of the EMC product norm EN 61800-3 for variable-speed electrical drive mechanisms is with the manufacturer of the industrial plant or machine. The documentation contains information on EMC-conformin connected to the frequency inverters may not be subjected to high-voltage insulation tests unless appropriate circuitry measures are taken before. Otherwise the unit may be damaged.

Before any assembly or connection work, discharge the frequency inverter. Verify that the frequency inverter is discharged. Do not touch the terminals because the capacitors may still be charged. Comply with the information frequency inverter label.

g at the frequency inverters, comply with the applicable standards BGV

g on the packaging. The units must not be stored

ge the isolating

ged or destroyed components shall be

given in the operating instructions and on the

g installation. The cables

Modbus Instruction manual 05/086

1.6 Information on Use

Warning!

The frequency inverter may be connected to power supply every 60 s. Consider this for a jog operation of a mains contactor. For commissioning or after an emergency stop, a non-recurrent, direct restart is permissible. After a failure and restoration of the power supply, the motor may star unexpectedly if the AutoStart function is activated. Install protective equipment if personal injury or material damage is possible. Before commissioning and start of the operation fix all covers and chec the terminals. Check the additional monitoring and protective devices accordin Machines Act, Accident Prevention Directives etc.). No connection work may be performed, while the system is in operation.

1.7 Maintenance and Service

Warning!

Unauthorized opening and improper interventions can lead to personal injury or material damage. Repairs on the frequency inverters may only be carried out by the manufacturer or persons authorized by the manufacturer. Check protective equipment regularly.

g to EN 60204 and applicable the safety directives (e.g. Working

Modbus Instruction manual 705/08

2 Introduction

This document describes the Modbus protocol of the communication modules CM-232

with RS232 port and CM-485 with RS485 port. This protocol can be used alternatively to the VABus via the same hardware (CM-232/CM-485). Both protocols can not be operated at the same time. The Modbus operation modes RTU and ASCII are available.

For the RS232 connection, the frequency inverter must be equipped with the RS232

communication module CM-232.

For the RS485 connection, the frequency inverter must be equipped with the RS485

communication module CM-485.

The communication modules CM-232 and CM-485 are separate components and must

be mounted to the frequency inverter by the user. This is described in detail in chapter "Assembly".

Note: This document only describes the communication modules CM-232 and

Note: In some chapters of these instructions, setting and display options via the

Attention! Via the RS232 port at CM-232 or the RS485 port at CM-485, a controller

RS485 connection:

Frequency inverters can be connected to a bus system by extension with CM-485 communication modules. The bus structure is linear and designed as a 2-wire line. Via a bus master, up to 247 frequency inverters can be addressed. The frequency inverters can be parameterized and controlled easily. Additionally, frequency inverter data can be polled and positionin during operation via the bus system by means of a PC or a PLC.

RS232 connection:

The RS232 connection enables a peer-to-peer connection between two clients.

CM-485. It does not provide basic information on the serial interfaces RS232 and RS485. Neither does it contain any basic information on the operation of the frequency inverters. Basic knowled

ge of the methods and function of the RS232 and RS485 serial interfaces and Modbus protocol is required in order to understand and use the instructions contained in this document.

PC software VPlus are described as an alternative to the KP500 control unit. In this case, VPlus communicates with the frequency inverter

− via the module CM-232 or CM-485 or

− via the interface adapter KP232.

If the serial interface of the module CM-232/CM-485 is connected to a PLC, for example, VPlus cannot access the frequency inverter via this interface directly. In this case, the PC must be connected via the optional interface adapter KP232.

can access all parameters of the frequency inverter. Any chan

ge of parameters, the meaning of which is unknown to the user,

may result in the frequency inverter becoming inoperative.

g commands can be transmitted

Modbus Instruction manual 05/088

3 Installation/Disassembly of the communication module

The communication module is pre-assembled in a case. Additionally, a PE spring is

3.1 Installation

enclosed for PE connection (shield). Caution! The frequency inverter must be disconnected from power supply before

installation of the communication module. Assembly under voltage is not permissible and will destroy the frequency inverter and/or the communication module. Do not touch the PCB visible on the back of the module, otherwise com-

Work steps:

ponents may be damaged.

• Disconnect the frequency inverter from mains voltage and protect it against being energized unintentionally.

• Remove covers (1) and (2) of the frequency inverter. Slot B (4) for the commu-

nication module is now accessible.

• Mount the supplied PE spring (5) using the M4 screw (6) in the unit. The spring must be aligned centrally.

• Insert the communication module in slot B (4) until it engages audibly.

• Fix the communication module by screwing the M2 screw (7) of the module to the

PE spring (5).

(M2)

(M4)

• In the upper cover (1), break out the pre-punched cutout (3) for the plug X310 (8).

• Mount the two covers (1) and (2).

Modbus Instruction manual 905/08

3.2 Disassembly

• Disconnect the frequency inverter from mains voltage and protect it against being energized unintentionally.

• Remove covers (1) and (2) of the frequency inverter.

• Loosen the M2 screw (7) at the communication module

• Unplug the communication module from Slot B (4) by unlocking the locking hooks (9) on the right and left side of the module from the case of the frequency in-

verter using a small screwdriver. The looking hooks (9) are located at the place where the looking hooks (10) for the upper cover (1) project from the case of the frequency inverter.

To do this, insert the screwdriver in the gap between the case of the module

•

and the frequency inverter carefully and push the locking hook inwards in the direction of the arrow (

Õ). As soon as the right side is unlocked, pull out the

module a bit on the right side and hold it.

• Hold the module on the ri

side in the same way (

ght side while unlocking the locking hook on the left

Ö).

• Pull the module out of the slot by gently pulling on the right and left side al-

ternately.

• Disassemble the PE spring (5).

• Mount the two covers (1) and (2).

Modbus Instruction manual 05/0810

4 Plug Assignment/Bus Termination/Cable

Bus Connector X310 CM-232 (9p Sub-D)

• If no pre-assembled connection cable is used for the RS232 connection, a twisted

4.1 RS232 module CM-232

The RS232 interface is connected to a PC or a

Part. no. 179 675-100

pin name function

Housing Shield connected with PE

– n. c.

RxD receive Data (input)

TxD transmit Data (output)

– n. c.

0 V Ground

– n. c.

and shielded cable is to be used

• 1:1 assignment of the pin contacts

• The shield must be a harness shield (not a foil shield)

• The shield is to be connected to PE properly on both sides

controller via the 9-pin D-Sub socket X310. The

gnment complies with the standard, thus a

assi RS232 connection cable (1:1) is required for connection only.

X310

Modbus Instruction manual 1105/08

4.2 RS485 module

• For the bus cable RS485, the twisted and shielded line is to be used

• The shield must be a harness shield (not a foil shield)

• The shield is to be connected to PE properly on both sides.

The pin assignment of the RS485 cable is different from that of the RS232 cable;

•

if you use the wrong cable, no communication is possible

4.2.1 RS485 module CM-485 DB9

The RS485 interface is connected via the 9-pin D-Sub socket X310.

For details on the pin assi following table.

Part. No. 179 675-110

X310

Bus Connector X310 CM-485 DB9

pin name function

Housing Shield connected with PE

Data Line B short-circuit proof and functionally insulated; max. current 60 mA

Data Line B’ same as pin 1 – for cable network

0 V GND/earth

– n. c.

+5 V Supply voltage interface converter +5 V

– n. c.

Data Line A short-circuit proof and functionally insulated; max. current 60 mA

Data Line A’ same as pin 7 – for cable network

– n. c.

4.2.2 RS485 module CM-485 T

The RS485 interface is connected via the 7-pin terminal socket X310

For details on the pin assignment, refer to the following table.

gnment, refer to the

Part. no. 179 675-111

Busstecker X310 CM-485T (7p terminal)

terminal name function

1 Data Line A short-circuit proof and functionally insulated; max. current 60 mA

2 Data Line A’ same as terminal 1 – for cable network

3 Data Line B short-circuit proof and functionally insulated; max. current 60 mA

4 Data Line B’ same as terminal 3 – for cable network

5 +5 V Supply voltage interface converter +5 V

6 0 V GND/ earth

7 PE Shield/PE

Modbus Instruction manual 05/0812

4.2.3 Bus termination

Attention! The passive bus termination (connection of a termination resistor) is

required at the physically first and last client. It can be activated by the DIP Switch S1 of the CM-232 and CM-485.

By default, the bus termination is set to OFF.

It is important to realize the correct termination. If not, no communication is possible

by the RS485 interface!

As an alternative the active bus termination is possible via corresponding circuit:

The active termination is only allowed once each branch. The bus termination via an external circuit and via DIP switch at the same time is not allowed.

Take care for the ground wiring; this will protect the communication bus for a high noise level.

For easy wiring the signal terminals A and B have parallel contacts.

Example of wiring with different CM-485 modules:

max. 1200 - 2400m

12 78 3

GND

9pin D-Sub

GND

Inverter 1 Inverter (last)Master (PC) termination OFF termination ONtermination ON

7pin terminal

1234 6

GND

Modbus Instruction manual 1305/08

5 Startup

By default, the parameters of the communication modules CM-232 and CM-485 are

set as follows:

No. Description Factory setting

395 Protocol Type 0 - VCB bus protocol

413 Watchdog Timer 0

No. Description Factory setting

10 Baud Rate 4 - 19200

1375 Modbus Parity 0 – EVEN

1376 Modbus Address 1

5.1 General Information on configuration

The CM-232 / CM-485 communication modules can be configured in different ways:

− Direct connection CM-232 to PC / PLC

Direct connection between the 9-pin Sub-D socket (X310) of the

− Direct connection CM-485 to PC / PLC

Direct connection between the 9-pin Sub-D socket (X310) of the

Attention! For connection of the CM-485 to the RS232 interface of the PC /

− Connection of interface adapter KP232 to PC

Connection of the interface adapter KP232 at slot A of the fre-

− Configuration via Control Unit KP500

Configuration via the pluggable control unit KP500 at slot A of the

Parameter Settings

CM-232 and the serial interface of a PC / PLC. Configuration of the installed communication module via the control software VPlus or the control unit KP500.

In the case of the CM-232 the connection to a PC / PLC is realized via a RS232 connection cable (1:1).

CM-485 and the serial interface of a PC via an interface converter.

PLC, an appropriate interface converter must be installed in the signal line.

Configuration of the installed communication module via the control software VPlus or the control unit KP500.

quency inverter. Connection to PC via a RS232 connection cable (1:1). Configuration of the installed communication module via the control software VPlus.

frequency inverter.

Modbus Instruction manual 05/0814

Attention! The transmitter and receiver must be set to the same transmission rate

(Baud rate).

The setting of the Baud rate effects the communication of the modules CM-232 and CM-485. The KP232 interface adapter adjusts the Baud rate automatically to the PC or control transmission rate.

Work steps:

• Install module CM-232/CM-485 on the frequency inverter.

• In the case of module CM-232:

Connect CM-232 and PC/PLC via RS232 cable.

• In the case of module CM-485:

Connect CM-485 via RS485 cable with interface converter. Connect the RS232 port of the interface converter with the PC/PLC.

• Plug in control unit KP500 or interface adapter KP232 to slot A of the frequency inverter.

• In the case of KP232: Connect interface adapter KP232 to PC via a serial cable.

Protocol type settings

By default, the communication modules CM-232/CM-485 are set to the BONFIGLIOLI

VECTRON standard protocol (VCB-Bus). Communication with the VPlus control software is only possible with this protocol type.

Attention! If another protocol type or a wrong setting is selected, no communica-

tion is possible via CM-232/CM-485. In this case, correct the protocol type using the control unit KP500.

For detailed information, see chapter

6 “Modbus over Serial Line Proto-

col”.

Note: The interface adapter KP232 operates with the BONFIGLIOLI VECTRON

standard protocol VCB-Bus independent of the communication module CM-232 or CM-485 and can communicate with VPlus at any time.

Modbus Instruction manual 1505/08

The transmission speed and parity of the CM-232 are set via parameters

5.2 RS232 Module CM-232

5.2.1 Setting the Modbus Baud Rate and Parity

Baud Rate 10 and Modbus Parity

1375.

The transmission speed of the CM-232 depends on various application-specific pa-

rameters. For example, the cable length limits the transmission speed due to signal propagation delays.

Baud Rate 10 Function max. cable length

1 – 2400 Baud Transmission rate 2400 Baud 30 m

2 – 4800 Baud Transmission rate 4800 Baud 30 m

3 – 9600 Baud Transmission rate 9600 Baud 30 m

4 – 19200 Baud Transmission rate 19200 Baud 30 m

5 – 57600 Baud Transmission rate 57600 Baud 10 m

6 – 115200 Baud Transmission rate 115200 Baud 10 m

The indicated cable lengths are recommended maximum values which depend,

among other things, on the quality of the cable.

Modbus Parity 1375 Function

0 – EVEN EVEN Parity is used in transmission

1 – ODD ODD Parity is used in transmission

2 – None No Parity is used in transmission

Attention! Baud rate and parity changes are only active after a reset of the fre-

quency inverter via the software or Mains Off/On. In the case of the software reset, proceed as follows:

• Via the control unit KP500 or the control software VPlus open parameter

Program(ming) 34.

• Set parameter value "123".

• Confirm by pressing "ENT".

After the reset, the frequency inverter is initialized and is ready for operation after a few seconds.

5.2.2 Setting the Modbus Address

The address of the CM-232 can be set via parameter Modbus Address 1376.

No. Description Min. Max. Fact. sett.

1376 Modbus Address 1 247 1

Parameter Settings

Note: Normally, it is not necessary to change the default setting (Address 1).

In the case of special operating conditions, the address can be adjusted.

Attention! An address change is effective immediately, i.e. without a restart of

the frequency inverter.

For details on addressing, see chapter 6.2 “Addressing Rules”.

Modbus Instruction manual 05/0816

The transmission speed and parity of the CM-485 are set via parameters

5.3 RS485 Module CM-485

5.3.1 Setting the Modbus Baud Rate and Parity

Baud Rate 10 and Modbus Parity

1375.

The transmission speed of the CM-485 depends on various application-specific pa-

rameters. For example, the cable length limits the transmission speed due to signal propagation delays. In case of using very long cables, it is possible to take RS485 repeater units.

Baud Rates 10 Function max. line length

1 – 2400 Baud Transmission rate 2400 Baud 2400 m

2 – 4800 Baud Transmission rate 4800 Baud 2400 m

3 – 9600 Baud Transmission rate 9600 Baud 1200 m

4 – 19200 Baud Transmission rate 19200 Baud 1200 m

5 – 57600 Baud Transmission rate 57600 Baud 600 m

6 – 115200 Baud Transmission rate 115200 Baud 300 m

Attention! • All bus clients must be set to the same baud rate.

• Baud rate changes are only active after a reset of the frequency

inverter via the software or Mains Off/On. In the case of the software reset, proceed as follows:

• Via the control unit KP500 or the control software VPlus open parameter

Program(ming) 34.

• Set parameter value "123".

• Confirm by pressing "ENT".

After the reset, the frequency inverter is initialized and is ready for operation after a few seconds.

Modbus Parity 1375 Function

0 – EVEN EVEN Parity is used in transmission

1 – ODD ODD Parity is used in transmission

2 – None No Parity is used in transmission

5.3.2 Setting the Modbus Node Address

The node address of the CM-485 is set via parameter Modbus Address 1376. Up to

247 frequency inverters can be used on the RS485 bus. The frequency inverters are assigned unambiguous addresses in the range from 1 to 247.

No. Description Min. Max. Fact. sett.

1376 Modbus Address 1 247 1

Parameter Settings

Attention! − For operation with the CM-485 module, each client must be as-

signed an address.

− Bus addresses may only be assigned once, i.e. no double assignments.

− An address change is effective immediately, i.e. without a restart of the frequency inverter.

For details on addressing, see 6.2.

Modbus Instruction manual 1705/08

6 Modbus over Serial Line Protocol

The Modbus protocol described in the following has been incorporated into the stan-

dard ACT/ACU software of BONFIGLIOLI VECTRON. It defines and describes the communication via the serial interfaces RS232/RS485 using the Modbus RTU and ASCII transmission modes.

By default, the frequency inverters are set to the standard VCB bus protocol. The Modbus protocol type can be set via parameter

Protocol 395 Function

0 - VCB Bus

1 - P-Bus

2 - Modbus RTU

3 - Modbus ASCII

Note

Attention ! − Changes of the parameter Protocol 395 are effective immedi-

The Modbus protocol enables the operation as a pure Master/Slave system. A PC, a PLC or any type of computer system is the bus master.

6.1 Master/Slaves Protocol Principle

The Modbus Serial Line protocol is a Master-Slaves protocol. Only one master (at the same time) is connected to the bus, and one or several (maximum 247) slave nodes are also connected to the same serial bus. A Modbus communication is always initiated by the master. The slave nodes will never transmit data without receiving a request from the master node. The slave nodes will never communicate with each other. The master node initiates only one Modbus transaction at a time.

The master node issues a Modbus request to the slave nodes in two modes:

Protocol 395:

BONFIGLIOLI VECTRON standard protocol (default setting)

Application-specific bus protocol

Modbus over serial line (with RTU Transmission Mode)

Modbus over serial line (with ASCII Transmission Mode)

This bus protocol is only used for special applications. It cannot be used for standard applications. For more detailed information, refer to the application-specific instructions.

ately, i.e. without a restart of the frequency inverter.

− If the wrong protocol is selected, communication via CM-232/CM-

485 is not possible. In this case, correct the protocol type using the control unit KP500 or KP232 and VPlus.

− In unicast mode, the master addresses an individual slave. After receiving and

processing the request, the slave returns a message (a 'response') to the master. In this mode, a Modbus transaction consists of 2 messages: a request from the master, and a response from the slave. Each slave must have a unique address (from 1 to 247) so that it can be addressed independently from other nodes.

− In broadcast mode, the master can send a request to all slaves. No response

is returned to broadcast requests sent by the master. The broadcast requests are necessarily writing commands. All devices must accept the broadcast for writing function. Address 0 is reserved to identify a broadcast exchange.

Modbus Instruction manual 05/0818

6.2 Addressing Rules

Up to 247 frequency inverters can be used on a Modbus. These are assigned the

addresses 1…247. By address 0, all clients can be addressed simultaneously. Address 0 is also referred to as the Broadcast Address.

A Modbus over serial line message is made up of the following fields:

6.3 Message Description

Address Function Code Data

CRC (or LRC)

• On MODBUS Serial Line, the Address Field only contains the slave address.

Valid slave node 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 returns its response, it places its own address in the response address field to let the master know which slave is responding.

• The

Function Code

function code can be followed by a

indicates to the inverter what kind of action to perform. The

Data

field that contains request parameters

(or, in the case of the inverter's response, the response parameters).

If no error occurs related to a correctly received Modbus request then the data field contains the data requested. If an error occurs then the field contains an Exception Code to indicate to the master that the request was unsuccessful. Exception Responses and Codes are described in detail in chapter

6.5.

If a request is not received correctly (communication error, checksum error) then no response is sent. The inverter waits for the next request.

• The Error Checking Field is the result of a "Redundancy Checking" calculation that is performed on the message contents. Two kinds of calculation methods are used depending on the transmission mode that is being used (RTU or ASCII)

- see chapter

6.7, "The two serial Transmission Modes".

Modbus Instruction manual 1905/08

Modbus definitions for reading/writing data in a device do not fit directly to parame-

6.4 Supported Function Codes

ter access of inverters (independent of inverter manufacturer). Modbus is defined for reading/writing bits and registers in a different way. Furthermore, data access is limited to 16 bit wide data.

To fulfill the Modbus requirements the data access to parameters in the devices (inverters) will use the following defined function codes:

- Function Code 3 Read ONE 16 bit wide data

- Function Code 6 Write ONE 16 bit wide data

(Read Holding Register)

(Write Single Register)

For data access to 32 bit wide data two new inverter specific function codes are defined:

- Function Code 100 Read ONE 32 bit wide data

- Function Code 101 Write ONE 32 bit wide data

With the help of these two new functions (which are not defined by the Modbus descriptions), data access to 32-bit “long” variables/parameters inside the inverters is made possible.

For diagnostic purposes the Modbus function code "8" (

Diagnostics

) is also sup-

ported.

These function codes and their corresponding data fields are described in detail in the following chapters.

Remark: In all data fields with more than one byte, the highest order byte is transmitted first.

Message examples for all supported function codes in both RTU and ASCII transmis-

sion modes can be found in chapters

6.4.1 Function Code 3, Read 16-bit Parameter

This function code is used to read the value of integer or unsigned integer parame-

ters in the inverter.

Request:

Function Code 1 Byte 0x03

Start Address (Data Set / Para-No.) 2 Bytes 0x0000 – 0x963F

No. of Registers 2 Bytes 0x0001 (always)

Response:

Function Code 1 Byte 0x03

Byte Count 1 Byte 0x02 (always)

Exception Response:

Error Code 1 Byte 0x83

Exception code 1 Byte 2, 3 or 4

Modbus Instruction manual 05/0820

Start Address

This field is used to store the parameter number and data set number. The parameter number ranges from 0 - 1599 and is stored in the lower 12bits; the data set number ranges from 0 – 9 and is stored in the upper 4 bits.

Example: Parameter 372 (hex. 0x174), data set 2 (hex. 0x2) is stored as hex.

Start address Data set Parameter number

0x2174

Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

For the example above:

Hex. 0 0 1 0 0 0 0 1 0 1 1 1 0 1 0 0

Bin. 2 1 7 4

No. of Registers

This field is used to store the no. of parameters to be written. The value must always be 1 as it is only possible to write one parameter at a time.

Byte Count

This field must be set to 2 as the parameter value always contains two bytes.

This field is used to store the 16-bit parameter value.

Note:

Parameter Values

with decimal places are transferred without the decimal point. Depending on the number of decimal places, the values are multiplied by 10, 100 or 1000.

Example:

A current value of 10.3A is to be transmitted. The numerical value actually transmit-

ted is 103, which corresponds to 0x67 in HEX format.

Exception Code

The following exception codes can occur:

2 ILLEGAL DATA ADDRESS • No. of Registers field not equal to 1.

• Parameter unknown

3 ILLEGAL DATA VALUE

4 SLAVE DEVICE FAILURE • Error on reading the parameter

• No. of bytes in the data field too small or too large

Exception Codes are described in detail in Chapter 6.6

Modbus Instruction manual 2105/08

This function code is used to write the value of an integer or unsigned integer pa-

6.4.2 Function Code 6, Write 16-bit Parameter

rameter in the inverter.

Request:

Function Code 1 Byte 0x06

Start Address (Data Set / Para-No.) 2 Bytes 0x0000 – 0x963F

Response:

Function Code 1 Byte 0x06

Start Address (Data Set / Para-No.) 2 Bytes 0x0000 – 0x963F

Exception Response:

Error Code 1 Byte 0x86

Exception code 1 Byte 2, 3 or 4

Start Address

This field is used to store the parameter number and data set number. The parameter number ranges from 0 – 1599 and is stored in the lower 12 bits; the data set number ranges from 0 – 9 and is stored in the upper 4 bits.

e.g.: Parameter 372 (hex. 0x174), data set 2 (hex. 0x2) is stored as hex. 0x2174

Start address Data set Parameter number

Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

This field is used to store the 16-bit parameter value.

Note:

Parameter Values

with decimal places are transferred without the decimal point. Depending on the number of decimal places, the values are multiplied by 10, 100 or 1000.

Example:

A curent value of 10.3A is to be transmitted. The numerical value actually transmit-

ted is 103, which corresponds to 0x67 in HEX format.

Exception Code

The following exception codes can occur:

2 ILLEGAL DATA ADDRESS

3 ILLEGAL DATA VALUE

4 SLAVE DEVICE FAILURE • Error on writing the parameter

• Parameter unknown

• No. of bytes in the data field too small or too large

Exception Codes are described in detail in Chapter 6.6

Modbus Instruction manual 05/0822

6.4.3 Function Code 100, Read 32-bit Parameter

Request:

Function Code 1 Byte 0x64

Start Address (Data Set / Para-No) 2 Bytes 0x0000 – 0x963F

Response:

Function Code 1 Byte 0x64

Exception Response:

Error Code 1 Byte 0xE4

Exception code 1 Byte 2, 3 or 4

Start Address

e.g.: Parameter 372 (hex. 0x174), data set 2 (hex. 0x2) is stored as hex. 0x2174

Start address Data set Parameter number

Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

This field is used to store the 32-bit parameter value.

Note:

Parameter Values

with decimal places are transferred without the decimal point. Depending on the number of decimal places, the values are multiplied by 10, 100 or 1000.

Example:

A frequency value of 100.25 Hz is to be transmitted. The numerical value actually

transmitted is 10025, which corresponds to 0x2729 in HEX format.

Exception Code

The following exception codes can occur:

2 ILLEGAL DATA ADDRESS

3 ILLEGAL DATA VALUE

4 SLAVE DEVICE FAILURE • Error on reading the parameter

• Parameter unknown

• No. of bytes in the data field too small or too large

Exception Codes are described in detail in Chapter 6.6

Modbus Instruction manual 2305/08

6.4.4 Function Code 101, Write 32-bit Parameter

Request:

Function Code 1 Byte 0x65

Start Address (Data Set / Para-No) 2 Bytes 0x0000 – 0x963F

Response:

Function Code 1 Byte 0x65

Start Address (Data Set / Para-No) 2 Bytes 0x0000 – 0x963F

Exception Response:

Error Code 1 Byte 0xE5

Exception code 1 Byte 2, 3 or 4

Start Address

e.g.: Parameter 372 (hex. 0x174), data set 2 (hex. 0x2) is stored as hex. 0x2174

Start address Data set Parameter number

Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

This field is used to store the 32-bit parameter value.

Note:

Parameter Values

with decimal places are transferred without the decimal point. Depending on the number of decimal places, the values are multiplied by 10, 100 or 1000.

Example:

Frequency Value:

A frequency value of 100.25 Hz is to be transmitted. The numerical value actually

transmitted is 10025, which corresponds to 0x2729 in HEX format.

Exception Code

The following exception codes can occur:

2 ILLEGAL DATA ADDRESS

3 ILLEGAL DATA VALUE

4 SLAVE DEVICE FAILURE • Error on writing the parameter

• Parameter unknown

• No. of bytes in the data field too small or too large

Exception Codes are described in detail in Chapter 6.6

Modbus Instruction manual 05/0824

6.4.5 Function Code 8, Diagnostics

This function code is used to access the modbus diagnostic counters that are supported by the inverter. Each counter can be obtained by a sub function code bound to the counter number. All of the counters can be cleared using the hexadecimal sub-function code 0x0A.

The following sub function codes are supported:

Sub function Name Comments

0x0A Clear all counters Sets all counters to zero

0x0B Return Bus Message Count No. of valid messages received

0x0C Return Bus Communication Error Count No. of messages with CRC or Par-

0x0D Return Bus Exception Error Count No. of Exception Responses sent

0x0E Return Slave Message Count No. of messages received

0x0F Return Slave No Response Count No. of Broadcast messages received

0x10 Return Slave NAK Count not used, return value is always 0

0x11 Return Slave Busy Count not used, return value is always 0

0x12 Return Bus Character Overrun Count No. of messages with Overrun error

Request (Sub function 0x0A, Clear all Counters):

(with all addresses)

ity/Framing/Overrun error.

(with slave address)

Function Code 1 Byte 0x08

Sub function 2 Bytes 0x000A

Data 2 Bytes 0x0000

Response:

Function Code 1 Byte 0x08

Sub function 2 Bytes 0x000A

Data 2 Bytes 0x0000

Exception Response:

Error Code 1 Byte 0x88

Exception code 1 Byte 1, 3 or 4

Data

This field is always 0x0000.

Exception Code

1 ILLEGAL FUNCTION CODE

3 ILLEGAL DATA VALUE

4 SLAVE DEVICE FAILURE • Error on carrying out the function

• Sub function not supported

• No. of bytes in the data field too small or too large

• “data field” not equal to 0x0000

Exception Codes are described in detail in Chapter 6.6

Modbus Instruction manual 2505/08

Request (Sub function 0x0B – 0x12, Return Counter Value):

Function Code 1 Byte 0x08

Sub function 2 Bytes 0x000B – 0x0012

Data 2 Bytes 0x0000

Response:

Function Code 1 Byte 0x08

Sub function 2 Bytes 0x000B – 0x0012

Data (Counter Value) 2 Bytes 0 – 0xFFFF

Exception Response:

Error Code 1 Byte 0x88

Exception code 1 Byte 1, 3 or 4

Data

This field is always set to 0x0000 in the request and contains the actual counter value in the response.

Exception Code

The following exception codes can occur:

1 ILLEGAL FUNCTION CODE

3 ILLEGAL DATA VALUE

4 SLAVE DEVICE FAILURE • Error on Reading the Diagnostic Counter

• Sub function not supported

• No. of bytes in the data field too small or too large

• “data field” not equal to 0x0000

Exception Codes are described in detail in Chapter 6.6

Modbus Instruction manual 05/0826

When the master device sends a request to the inverter it expects a normal re-

6.5 Exception Responses

sponse. One of four possible events can occur from the master’s query:

- If the inverter receives the request without a communication error and can handle the query normally, it returns a normal response.

- If the inverter does not receive the request due to a communication error, no response is returned. The master will eventually process a timeout condition for the request.

- If the inverter receives the request, but detects a communication error (parity, LRC, CRC, ...), no response is returned. The master will eventually process a timeout condition for the request.

- If the inverter receives the request without a communication error, but cannot handle it (for example, if the request is to read an unknown parameter, the inverter will return an exception response informing the client of the nature of the error.

The exception response message has two fields that differentiate it from a normal response:

Function Code Field:

In a normal response, the inverter echoes the function code of the original request in the function code field of the response. All function codes have a most–significant bit (MSB) of 0 (their values are all below 0x80 hexadecimal). In an exception response, the inverter sets the MSB of the function code to 1. This makes the function code value in an exception response exactly 0x80 hexadecimal higher than the value would be for a normal response. With the function code’s MSB set, the master can recognize the exception response and can examine the data field for the exception code.

Data Field:

In a normal response, the inverter may return data or statistics in the data field (any information that was requested in the request). In an exception response, the inverter returns an exception code in the data field. This defines the server condition that caused the exception.

The Exception Codes generated by the inverter are listed below

6.6 Exception Codes

The following exception codes are generated by the inverter.

Code Modbus Name Cases when generated by the Inverter

1 ILLEGAL FUNCTION

2 ILLEGAL DATA ADDRESS

3 ILLEGAL DATA VALUE

4 SLAVE DEVICE FAILURE

• Function Code unknown

• Subfunction Code unknown (Diagnostics Function)

• No. of Registers field incorrect (must always be 0x01)

• Unknown Parameter or Parameter Data Type mismatch

• Error in dataset of frame

- No. of bytes too small or too large

- Certain fields not set to specific values

• Read or Write Parameter failed The reason for the error can be obtained by reading out Parameter page).

VABus SST Error Register

(see next

Modbus Instruction manual 2705/08

Error no. Meaning

VABus SST Error Register 11

no error

inadmissible parameter value

inadmissible data set

parameter not readable (write-only)

parameter not writable (read-only)

read error EEPROM

write error EEPROM

checksum error EEPROM

parameter cannot be written while the drive is running

values of the data sets differ from one another

wrong parameter type

unknown parameter

checksum error in received telegram

syntax error in received telegram

data type of parameter does not correspond to the number of bytes in the telegram

unknown error

When the error register VABus SST Error Register 11 is read out, it is automatically

cleared at the same time.

Modbus Instruction manual 05/0828

6.7 The two serial Transmission Modes

Two different serial transmission modes are defined: the RTU mode and the ASCII mode. They define the bit contents of message fields transmitted serially on the

line. They determine how information is packed into the message fields and decoded.

The transmission mode (and serial port parameters) must be the same for all devices on a MODBUS Serial Line.

6.7.1 RTU Transmission

When devices communicate on a MODBUS serial line using the RTU (Remote Terminal Unit) mode, each 8–bit byte in a message contains two 4–bit hexadecimal characters. The main advantage of this mode is that its greater character density allows better data throughput than ASCII mode for the same baud rate. Each message must be transmitted in a continuous stream of characters.

6.7.1.1 Character Format

One character consists of 11 bits:

− 1 start bit

− 8 data bits, least significant bit sent first

− 1 parity bit

− 1 stop bit

Note If no parity is used then an extra stop bit is added.

Character format with parity checking:

Start B1 B2 B3 B4 B5 B6 B7 B8 Parity Stop

Character format without parity checking:

Start B1 B2 B3 B4 B5 B6 B7 B8 Stop Stop

6.7.1.2 Frame Description

Slave

Address

1 byte 1 byte 0 up to 252 bytes

The maximum size of a MODBUS RTU frame is 256 bytes.

Function

Code

Data CRC

2 bytes

(CRC-Lo, CRC-Hi)

Modbus Instruction manual 2905/08

6.7.1.3 Modbus Message RTU Framing

A MODBUS message is placed by the transmitting device into a frame that has a

MODBUS Message

Start Address

>= 3.5 char 8 bits 8 bits N x 8 bits 16 bits >= 3.5 char

Function Data CRC End

The entire message frame must be transmitted as a contiguous stream of characters.

If a silent interval of more than 1.5 character times occurs between two characters, the message frame is declared incomplete and is discarded by the inverter.

6.7.1.4 CRC Checking

The RTU mode includes an error–checking field that is based on a Cyclical Redundancy Checking (CRC) method performed on the message contents.

The CRC field checks the contents of the entire message. It is applied regardless of any parity checking method used for the individual characters of the message.

The CRC field contains a 16–bit value implemented as two 8–bit bytes.

The CRC field is appended to the message as the last field in the message. It is appended in the sequence “low-order byte”, “high-order byte”. The CRC high–order byte is the last byte to be sent in the message.

The CRC value is calculated by the sending device, which appends the CRC to the message. The receiving device recalculates a CRC during receipt of the message, and compares the calculated value to the actual value it received in the CRC field. If the two values are not equal, an error results.

The CRC calculation is started by first pre-loading a 16–bit register to all 1’s (0xFFFF). Then a process begins of applying successive bytes of the message to the current contents of the register.

During generation of the CRC, each 8bit character is ExOR with the register contents. Then the result is shifted in the direction of the least significant bit (LSB), with a zero filled into the most significant bit (MSB) position. The LSB is extracted and examined. If the LSB was a 1, the register is then ExOR with the fixed value 0xA001. If the LSB was a 0, no ExOR takes place.

This process is repeated until eight shifts have been performed. After the last (eight) shift, the next 8bit char is ExOR with the register’s current value, and the process repeats for eight more shifts as described above. The final content of the register, after all the bytes of the message have been applied, is the CRC value.

When the CRC is appended to the message, the low-order byte is appended first, followed by the high-order byte.

Modbus Instruction manual 05/0830

Example for CRC calculating for the frame : “0x02 0x07”

MSB LSB Start CRC 1111 1111 1111 1111 0xFFFF

1.char 0000 0000 0000 0010 0x02

ExOR

CRC 1111 1111 1111 1101

1.shift right

0111 1111 1111 1110 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1101 1111 1111 1111

2.shift right

0110 1111 1111 1111

0xA001 1010 0000 0000 0001

ExOR

CRC 1100 1111 1111 1110

3.shift right

4.shift right

0110 0111 1111 1111 ⇒0 = no ExOR 0011 0011 1111 1111 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1001 0011 1111 1110

5.shift right

6.shift right

0100 1001 1111 1111 ⇒0 = no ExOR 0010 0100 1111 1111 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1000 0100 1111 1110

7.shift right

8.shift right

0100 0010 0111 1111 ⇒0 = no ExOR 0010 0001 0011 1111 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1000 0001 0011 1110

2.char 0000 0000 0000 0111 0x07

ExOR

CRC 1000 0001 0011 1001

1.shift right

0100 0000 1001 1100 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1110 0000 1001 1101

2.shift right

0111 0000 0100 1110 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1101 0000 0100 1111

3.shift right

0110 1000 0010 0111 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1100 1000 0010 0110

4.shift right

5.shift right

0110 0100 0001 0011 ⇒0 = no ExOR 0011 0010 0000 1001 ⇒1 = ExOR

0xA001 1010 0000 0000 0001

ExOR

CRC 1001 0010 0000 1000

6.shift right

7.shift right

8.shift right

result 1 2 4 1

0100 1001 0000 0100 ⇒0 = no ExOR 0010 0100 1000 0010 ⇒0 = no ExOR 0001 0010 0100 0001 ⇒0 = no ExOR

CRC = 0x41 0x12

Modbus Instruction manual 3105/08

Example : program sequence (C#)

private int Modbus_CRC(string frame)

{

int poly = 0xA001; // polynomal

int CRC = 0xFFFF; // start CRC

for (int i = 0; i < (int)(frame.Length); i++) // for each sign

{ CRC ^= Convert.ToInt16(frame[i]); // ExOR

for (int j = 0; j < 8; j++) // eight times

{

if ((CRC & 0x01) == 0x01) // lsb == 1 ?

{ CRC >>= 1; // shift left CRC ^= poly; // ExOR }

else

{ CRC >>= 1; // shift left } } }

return CRC;

}

Call the function for the frame : “0x02 0x07”

string temp_s = Convert.ToString((char)(0x2))+ Convert.ToString((char)(0x7));

Console.WriteLine(Modbus_CRC(temp_s));

Result : 4673 = 0x1241

CRC Low Byte = 0x41 CRC High Byte = 0x12

The Modbus CRC sequence is :

CRC Low Byte / High Byte 0x41 0x12

⇒

Modbus Instruction manual 05/0832

6.7.2 ASCII Transmission

When devices are setup to communicate on a MODBUS serial line using 7-bit ASCII (American Standard Code for Information Interchange) mode, each 8 bit character in a message is sent as two ASCII characters. This mode is used when the physical communication link or the capabilities of the device does not allow the conformance with RTU mode requirements regarding timers management. Remark: this mode is less efficient than RTU since each byte needs two characters. Example: The byte 0x5B is encoded as two characters: 0x35 and 0x42 ( 0x35 ="5", and 0x42 ="B" in ASCII ).

6.7.2.1 Character Format

One character consists of 10 bits:

− 1 start bit

− 7 data bits, least significant bit sent first (value = 0x00 .. 0x7F)

− 1 parity bit

− 1 stop bit

Note If no parity is used then an extra stop bit is added.

Character format with parity checking:

Start B1 B2 B3 B4 B5 B6 B7 Parity Stop

Character format without parity checking:

Start B1 B2 B3 B4 B5 B6 B7 Stop Stop

6.7.2.2 Modbus Message ASCII Framing

A MODBUS message is placed by the transmitting device into a frame that has a

known beginning and ending point. This allows devices that receive a new frame to begin at the start of the message, and to know when the message is completed. Partial messages must be detected and errors must be set as a result. The address field of a message frame contains two characters. In ASCII mode, a message is delimited by specific characters as Start-of-Frame and End-of-Frame. A message must start with a trigger “colon”- character (“:” = ASCII 0x3A) and ends with a “carriage return/line feed” pair (ASCII 0x0D and 0x0A).

The allowable characters transmitted for all other fields are hexadecimal 0–9, A–F (ASCII coded). The devices monitor the bus continuously for the colon character. When this character is received, each device decodes the next character until it detects the End-of-Frame (EoF)-character.

Modbus Instruction manual 3305/08

Intervals of up to one second may elapse between characters within the message. Unless the user has configured a longer timeout, an interval greater than 1 second means an error has occurred.

A typical message frame is shown below.

SoF Address

1 char : 2 chars 2 chars

Function Data LRC EoF

0 up to 2* 252 chars 2 chars 2 chars

6.7.2.3 LRC Checking

In ASCII mode, messages include an error–checking field that is based on a Longitudinal Redundancy Checking (LRC) calculation that is performed on the message contents, exclusive of the beginning ‘colon’ and terminating CRLF pair characters. It is applied regardless of any parity checking method used for the individual characters of the message.

The LRC field is one byte, containing an 8-bit binary value. The LRC value is calculated by the device that emits, which appends the LRC to the message. The device that receives calculates an LRC during receipt of the message, and compares the calculated value to the actual value it received in the LRC field. If the two values are not equal, an error results.

CR, LF

The LRC is calculated by adding together successive each byte of the message and then two’s complementing the result. It is performed on the ASCII message field contents excluding the ‘colon’ character that begins the message, and excluding the CRLF pair at the end of the message. In ASCII mode, the resulting LRC is ASCII encoded into two bytes and placed at the end of ASCII mode frame prior to the CRLF.

Example:

Field: SoF

ASCII

Hex

3A 30 31 38 33 30 32 37 41 0D 0A

Adr

: 0 1 8 3 0 2 7 A CR LF

Adr. 0x01 = Fct.Code 0x83 = Excep. 0x02 =

----------------------------Sum: 2’comp.

Fct.Code

LCR relevant

131

-------------- 134 122 = 0x7A

Excep.

Code

LRC

⇒

EoF

“7” = 0x37 “A” = 0x41

Modbus Instruction manual 05/0834

The Modbus protocol defines a pure Master/Slave operation. If a frequency inverter

6.8 Monitoring Timing Function

is addressed by the bus master, other frequency inverters will only be addressed after the protocol with the first frequency inverter has been completed or the Timeout time has expired.

After a frequency inverter has sent a message, a waiting time of 2 ms must be kept.

This time is needed by the frequency inverter in order to switch off the RS485 transmitter. The bus master may not send a new message before this time has elapsed.

The frequency inverter replies 10 ms after receipt of a message, at the earliest. This

means that the bus master must have switched off its RS485 transmitter after 10 ms, at the latest.

If the bus master does not receive an answer from the frequency inverter within

500 ms, it can start a new transmission to any frequency inverter.

Attention! If the degree of utilization of the CPU is high (> 90%), the response

time can be more than 500 ms.

Note: The specified times are valid for operation with RS485 and RS232.

6.9 Watchdog

If the frequency inverter is operated via the serial interface (RS232, RS485), it may

be important to monitor the presence of the communication line. For example it may be that the frequency inverter is switched on/off in Remote Mode, or it only receives its reference value cyclically via the serial interface. If the communication fails, no or faulty data are transmitted. This is recognized by the communication watchdog.

The watchdog function monitors the time in which no correct communication takes

place. This time can be adjusted via parameter

RS232/RS485 Watchdog Timer 413.

The adjusted value is the time in seconds (0...10000 seconds) within which at least one correct exchange of data must have occurred.

If the adjusted monitoring time has elapsed, the frequency inverter signals a fault.

The fault message F2010 Watchdog RS232/RS485 is displayed.

No. Name/Meaning Min. Max. fact. sett.

413 RS232/RS485 Watchdog Timer [sec] 0 10000 0

Parameter Settings

Note: If parameter RS232/RS485 Watchdog Timer 413 is set to 0 (default),

the monitoring function is deactivated.

Modbus Instruction manual 3505/08

7 Handling of Data Sets/Cyclic Writing

Access to the parameter values is carried out on the basis of the parameter number

and the required data set. There are parameters which only have one data value (data set 0) as well as parameters which have four data values (data sets 1...4). These are used for data set change-over.

If parameters with four data values are set via data set = 0, all four data sets are set

to the same value.

A read access with data set = 0 to such parameters is only successful if all four data sets are set to the same value. If this is not the case an Exception Response with exception code 4 "SLAVE DEVICE FAILURE" will be sent and parameter

Bus SST Error Register

another).

In this case, you must read out each data set separately for the relevant parameter.

The values are entered automatically into the EEPROM on the controller. If values

are to be written cyclically at a high repetition rate, there must be no entry into the EEPROM as it only has a limited number of admissible writing cycles (about 1 million cycles).

Caution! If the number of admissible writing cycles is exceeded, the EEPROM is

In order to avoid the destruction of the EEPROM, data which are to be written cycli-

Note: The data set for the parameter Control Word 410, Reference Frequency

cally can be entered exclusively into the RAM without a writing cycle to the EEPROM. In this case, the data are volatile, i.e. they are lost when the supply voltage is switched off (Mains Off). They must be written into the RAM again after the restart (Mains On). The RAM writing operation is activated by increasing the number of the target data set by five.

Access to the data sets of the frequency inverter

Parameter EEPROM RAM

Data set 0 0 5

Data set 1 1 6

Data set 2 2 7

Data set 3 3 8

Data set 4 4 9

11 set to the value 9 (values of data sets differ from one

destroyed.

484 and Reference Percentage RAM 524 is always zero. Inter-

RAM

nally they are not written into the EEPROM.

VA-

Modbus Instruction manual 05/0836

NVRam RAM

fieldbus : RS232 / 485, SystemBus ...

inverter

0 - 4 write

5 - 9 read

CPU function

dataset 1

save copy

dataset 2

dataset 3

dataset 4

0 - 4 write

VPlus + KP500

0 - 4 write

dataset 0

0 - 4 read

Modbus Instruction manual 3705/08

8 Modbus Message Examples

8.1 Modbus RTU-Message Examples

8.1.1 Function Code 3, Read 16-bit Parameter

Example 1:

Reading parameter Rated Speed 372 (0x0174) in data set 2 from the frequency inverter with address 1

Request: Master Î Frequency Inverter

Field: Addr. Func. DSet/Par-No. No. of Regs CRC

Hex

01 03 21 74 00 01 CE 2C

Response: Frequency Inverter Î Master

Field: Addr. Func. No.Bytes Par-Value CRC

Hex

The hexadecimal value sent is 0x056E = 1390. Parameter decimal places. Therefore, the rated speed is 1390 min

01 03 02 05 6E 3A F8

Rated Speed 372 has no

-1

Example 2:

Reading parameter Rated Speed 372 (0x0174) in data set 0 from the frequency inverter with address 1 and No. of Regs field set to 2 (invalid value)

Request: Master Î Frequency Inverter

Field: Addr. Func. DSet/Par-No. No. of Regs CRC

Hex

01 03 01 74 00 02 85 ED

Error Response: Frequency Inverter Î Master

Field: Addr. Func. Except. CRC

Hex

01 83 02 C0 F1

The exception code sent is hexadecimal value 0x02 = ILLEGAL DATA ADDRESS.

Modbus Instruction manual 05/0838

8.1.2 Function Code 6, Write 16-bit Parameter

Example 1:

Writing parameter Rated Mech. Power 376 (0x0178) in data set 4 to the frequency inverter with address 3.

The rated mechanical power is to be set to 1.5 kW. Parameter Rated Mech. Power 376 has one decimal place. Therefore the value to be sent is 15 = 0x000F.

Request: Master Î Frequency Inverter

Field: Addr Func DSet/Par-No. Par-Value CRC

Hex

03 06 41 78 00 0F 5C 09

Response: Frequency Inverter Î Master

Field: Addr Func DSet/Par-No. Par-Value CRC

Hex

03 06 41 78 00 0F 5C 09

The response is an echo of the request message.

Example 2:

Writing out of range value 0 to parameter 376 (0x0178) in data set 2 to the frequency inverter with address 3

Request: Master Î Frequency Inverter

Field: Addr Func DSet/Par-No. Par-Value CRC

Hex

03 06 21 78 00 00 02 0D

Error Response: Frequency Inverter Î Master

Field:

Hex

Addr

03 86 04 E2 63

Func Except. CRC

The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE

Modbus Instruction manual 3905/08

8.1.3 Function Code 100, Read 32-bit Parameter

Example 1:

Reading parameter Fixed Frequency 2 481 in data set 0 from the frequency inverter with address 1

Request: Master Î Frequency Inverter

Field: Adr Funct. DSet/Par-No. CRC

Hex

Response: Frequency Inverter Î Master

Field:

01 64 01 E1 81 DF

Adr

Funct.

Par-Value CRC

Hex

01 64 00 00 03 E8 70 BC

The hexadecimal value sent is 0x000003E8 = 1000. Parameter Fixed Frequency 2 481 has two decimal places. Therefore, fixed frequency 2 = 10.00 Hz.

Example 2:

Reading unknown parameter 1600 (0x0640) in data set 2 from the frequency inverter with address 1.

Request: Master Î Frequency Inverter

Field: Adr Funct. DSet/Par-No. CRC

Hex

01 64 26 40 5B 97

Error Response: Frequency Inverter Î Master

Field: Adr Funct. Except. CRC

Hex

01 E4 04 6A C3

The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE.

Modbus Instruction manual 05/0840

8.1.4 Function Code 101, Write 32-bit Parameter

Example 1:

Writing parameter Rated Frequency 375 (0x0177) in data set 2 from the frequency inverter with address 1

The rated frequency is to be set to 10.00Hz. Parameter Rated Frequency 375 has two decimal places. Therefore the value to be sent is 1000 = 0x03E8.

Request: Master Î Frequency Inverter

Field: Adr Funct. DSet/Par-No. Par-Value CRC

Hex

01 65 21 77 00 00 03 E8 46 C5

Response: Frequency Inverter Î Master

Field: Adr Funct. DSet/Par-No. Par-Value CRC

Hex

01 65 21 77 00 00 03 E8 46 C5

The response is an echo of the request message.

Example 2:

Writing out of range value 9.00 Hz to parameter 375 in data set 2 from the frequency inverter with address 1. As 376 has 2 decimal places the value to be sent is 900 = 0x0384

Request: Master Î Frequency Inverter

Field: Adr Funct. DSet/Par-No. Par-Value CRC

Hex

01 65 21 77 00 00 03 84 46 E8

Error Response: Frequency Inverter Î Master

Field: Adr Funct. Except CRC

Hex

01 E5 04 6B 53

The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE.

Modbus Instruction manual 4105/08

8.1.5 Function Code 8, Diagnostics

Example 1a:

Clearing all Diagnostic Counters (Sub function 0x0A) in the frequency inverter with address 1.

Request: Master Î Frequency Inverter

Field: Adr Funct. Sub function Data CRC

Hex

01 08 00 0A 00 00 C0 09

Response: Frequency Inverter Î Master

Field: Adr Funct. Sub function Data CRC

Hex

01 08 00 0A 00 00 C0 09

The response is an echo of the request. All counters are now set to zero.

Example 1b:

With all counters set to zero, read Diagnostic Counter 4, "Slave Message Count" (Sub function 0x0E) from the frequency inverter with address 1.

Request: Master Î Frequency Inverter

Field: Adr Funct. Sub function Data CRC

Hex

01 08 00 0E 00 00 81 C8

Response: Frequency Inverter Î Master

Field: Adr Funct. Sub function Data CRC

Hex

The counter value is 1(as this is the 1st message received after setting all counters to zero).

01 08 00 0E 00 01 40 08

Example 2:

Reading unknown Diagnostic Counter 8 (Sub function 0x13) from the frequency inverter with address 1

Request: Master Î Frequency Inverter

Field: Adr Funct. Sub function Data CRC

Hex

01 08 00 13 00 00 11 CE

Error Response: Frequency Inverter Î Master

Field: Adr Funct. Except. CRC

Hex

01 88 01 87 C0

The exception code sent is hexadecimal value 0x01 = ILLEGAL FUNCTION.

Modbus Instruction manual 05/0842

8.2 Modbus ASCII-Message Examples

8.2.1 Function Code 3, Read 16-bit Parameter

Example 1:

Reading of parameter Rated Speed 372 (0x0174) in data set 2 from the frequency inverter with address 1

Request: Master Î Frequency Inverter

Field SoF Adr Fct.Code DSet/Par-No. No. of Regs LRC EoF

ASC

Hex

: 0 1 0 3 2 1 7 4 0 0 0 1 6 6 CR LF

3A 30 31 30 33 32 31 37 34 30 30 30 31 36 36 0D 0A

Response: Frequency Inverter Î Master

Field: SoF Adr Fct.Code no.Bytes Par-Value LRC EoF

ASC

Hex

: 0 1 0 3 0 2 0 5 6 E 8 7 CR LF

3A 30 31 30 33 30 32 30 35 36 45 38 37 0D 0A

The hexadecimal value sent is 0x056E = 1390. Parameter Rated Speed 372 has no decimal places. Therefore, the rated speed is 1390 min

-1

Example 2:

Reading parameter Rated Speed 372 (0x0174) in data set 0 from the frequency inverter with address 1 and No. of Regs field set to 2 (invalid value)

Field: SoF Adr Fct.Code DSet/Par-No. No. of Regs LRC EoF

ASC

Hex

: 0 1 0 3 0 1 7 4 0 0 0 2 8 5 CR LF

3A 30 31 30 33 30 31 37 34 30 30 30 32 38 35 0D 0A

Error Response: Frequency Inverter Î Master

Field: SoF Adr Fct.Code

ASC

: 0 1 8 3 0 2 7 A CR LF

Excep.

Code

LRC EoF

Hex

3A 30 31 38 33 30 32 37 41 0D 0A

The sent exception code is hexadecimal value 0x02 = ILLEGAL DATA ADDRESS.

Modbus Instruction manual 4305/08

8.2.2 Function Code 6, Write 16-bit Parameter

Example 1:

Writing parameter Rated Mech. Power 376 (0x0178) in data set 4 to the frequency inverter with address 3.

The rated mechanical power is to be set to 1.5 kW. Parameter Rated Mech. Power 376 has one decimal place. Thus the value to be sent is 15 = 0x000F.

Request: Master Î Frequency Inverter

Field: SoF Adr Fct.Code DSet/Par-No. Para-Value LRC EoF

ASC

Hex

: 0 3 0 6 4 1 7 8 0 0 0 F 2 F CR LF

3A 30 33 30 36 34 31 37 38 30 30 30 46 32 46 0D 0A

Response: Frequency Inverter Î Master

Field: SoF Adr Fct.Code DSet/Par-No. Para-Value LRC EoF

ASC

Hex

: 0 3 0 6 4 1 7 8 0 0 0 F 2 F CR LF

3A 30 33 30 36 34 31 37 38 30 30 30 46 32 46 0D 0A

The response is an echo of the request message.

Example 2:

Writing out of range value 0 to parameter 376 (0x0178) in data set 2 to the frequency inverter with address 3

Request: Master Î Frequency Inverter

Field: SoF Adr Fct.Code DSet/Par-No. Para-Value LRC EoF

ASC

Hex

: 0 3 0 6 2 1 7 8 0 0 0 0 5 E CR LF

3A 30 33 30 36 32 31 37 38 30 30 30 30 35 45 0D 0A

Error Response: Frequency Inverter Î Master

Field: SoF Adr Fct.Code

ASC

: 0 3 8 6 0 4 7 3 CR LF

Excep.

Code

LRC EoF

Hex

3A 30 33 38 36 30 34 37 33 0D 0A

The sent exception code is hexadecimal value 0x04 = SLAVE DEVICE FAILURE

Modbus Instruction manual 05/0844

8.2.3 Function Code 100, Read 32-bit Parameter

Example 1:

Reading parameter Fixed Frequency 2 481 in data set 0 from the frequency inverter with address 1

Request: Master Î Frequency Inverter

Field: SoF Adr Fct.Code DSet/Par-No. LRC EoF

ASC

Hex

: 0 1 6 4 0 1 E 1 B 9 CR LF

3A 30 31 36 34 30 31 45 31 42 39 0D 0A

Response: Frequency Inverter Î Master

Field: SoF Adr Fct.Code Para-Value LRC EoF

ASC

Hex

: 0 1 6 4 0 0 0 0 0 3 E 8 B 0 CR LF

3A 30 31 36 34 30 30 30 30 30 33 45 38 42 30 0D 0A

The hexadecimal value sent is 0x000003E8 = 1000. Parameter Fixed Frequency 2 481 has 2 decimal places. Therefore, fixed frequency 2 = 10.00 Hz.

Example 2:

Reading unknown parameter 1600 (0x0640) in data set 2 from the frequency inverter with address 1

Request: Master Î Frequency Inverter

Field: SoF Adr Fct.Code DSet/Par-No. LRC EoF

ASC

: 0 1 6 4 2 6 4 0 3 5 CR LF

Hex

3A 30 31 36 34 32 36 34 30 33 35 0D 0A

Error Response: Frequency Inverter Î Master

Field: SoF Adr Fct.Code

ASC

Hex

: 0 1 E 4 0 2 1 9 CR LF

3A 30 31 45 34 30 34 31 37 0D 0A

Excep.

Code

LRC EoF

The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE.

Modbus Instruction manual 4505/08

8.2.4 Function Code 101, Write 32-bit Parameter

Example 1:

Writing parameter Rated Frequency 375 (0x0177) in data set 2 to frequency inverter with address 1

The rated frequency is to be set to 10.00Hz. Parameter Rated Frequency 375 has two decimal places. Therefore the value to be sent is 1000 = 0x03E8.

Request: Master Î Frequency Inverter

SoF

Fld

Adr Fct.Cd DSet/Par-No. Para-Value LRC EoF

ASC

: 0 1 6 5 2 1 7 7 0 0 0 0 0 3 E 8 1 7 CR LF

Hex

3A 30 31 36 35 32 31 37 37 30 30 30 30 30 33 45 38 31 37 0D 0A

Response: Frequency Inverter Î Master

SoF

Fld

ASC

Hex

Adr Fct.Cd DSet/Par-No. Para-Value LRC EoF

: 0 1 6 5 2 1 7 7 0 0 0 0 0 3 E 8 1 7 CR LF

3A 30 31 36 35 32 31 37 37 30 30 30 30 30 33 45 38 31 37 0D 0A

The response is an echo of the request message.

Example 2:

Writing out of range value to 9.00 Hz to parameter 375 (0x0177) in data set 2 from the frequency inverter with address 1 As 375 has 2 decimal places the value to be sent is 900 = 0x0384

Request: Master Î Frequency Inverter

SoF

Fld

ASC

Hex

Adr Fct.Cd DSet/Par-No. Para-Value LRC EoF

: 0 1 6 5 2 1 7 7 0 0 0 0 0 3 8 4 7 B CR LF

3A 30 31 36 35 32 31 37 37 30 30 30 30 30 33 38 34 37 42 0D 0A

Error Response: Frequency Inverter Î Master

Field

ASC

SoF

Adr Fct.Code

: 0 1 E 5 0 4 1 6 CR LF

Excep.

Code

LRC EoF

Hex

3A 30 31 45 35 30 34 31 36 0D 0A

The exception code sent is hexadecimal value 0x04 = SLAVE DEVICE FAILURE.

Modbus Instruction manual 05/0846

8.2.5 Function Code 8, Diagnostics

Example 1a:

Clearing all Diagnostic Counters (Sub function 0x0A) in the frequency inverter with address 1

Request: Master Î Frequency Inverter

Field:

SoF

Adr Fct.Code Subfunction Data LRC EoF

ASC

Hex

: 0 1 0 8 0 0 0 A 0 0 0 0 E D CR LF

3A 30 31 30 38 30 30 30 41 30 30 30 30 45 44 0D 0A

Response: Frequency Inverter Î Master

Field:

ASC

Hex

SoF

Adr Fct.Code DSet/ Para-No. No. of Regs LRC EoF

: 0 1 0 8 0 0 0 A 0 0 0 0 E D CR LF

3A 30 31 30 38 30 30 30 41 30 30 30 30 45 44 0D 0A

The response is an echo of the request. All counters are now set to zero.

Example 1b:

With all counters set to zero, read Diagnostic Counter 4, "Slave Message Count" (Sub function 0x0E) from the frequency inverter with address 1

Field:

ASC

Hex

SoF

3A 30 31 30 38 30 30 30 45 30 30 30 30 45 39 0D 0A

Adr Fct.Code Subfunction Data LRC EoF

: 0 1 0 8 0 0 0 E 0 0 0 0 E 9 CR LF

Response: Frequency Inverter Î Master

Field:

SoF

Adr Fct.Code Subfunction Data LRC EoF

ASC

Hex

: 0 1 0 8 0 0 0 E 0 0 0 1 E 8 CR LF

3A 30 31 30 38 30 30 30 45 30 30 30 31 45 38 0D 0A

Example 2:

Read unknown Diagnostic Counter 8 (Sub function 0x13) from frequency inverter with address 1

Request: Master Î Frequency Inverter

Field:

ASC

Hex

SoF

3A 30 31 30 38 30 30 31 33 30 30 30 30 45 34 0D 0A

Adr Fct.Code Subfunction Data LRC EoF

: 0 1 0 8 0 0 1 3 0 0 0 0 E 4 CR LF

Error Response: Frequency Inverter Î Master

Field:

ASC

Hex

SoF

: 0 1 8 8 0 1 7 6 CR LF

3A 30 31 38 38 30 31 37 36 0D 0A

Adr Fct.Code

Excep.

Code

LRC EoF

The exception code sent is hexadecimal value 0x01 = ILLEGAL FUNCTION.

Modbus Instruction manual 4705/08

9 ACT Inverter Control/Reference Value

The frequency inverter can be controlled completely via the serial interface. The fol-

lowing parameters and actual values are used for this:

No. Name/Meaning min. max. fact. sett. type

Control Word 0x0000

410

Status Word

411

Reference Frequency RAM [Hz]

484

Reference Percentage RAM [%]

524

With the Control Word 410 (data type uInt), control commands are sent to the fre-

quency inverter, with the

Reference Percentage RAM 524 (data type Long [%]), the reference line value is

sent. Via the read out.

Parameter Settings

0xFFFF – uInt

0x0000 0xFFFF – uInt

-999.99 999.99 0.00 Long

-300.00 300.00 0.00 Long

Reference Frequency RAM 484 (data type Long [Hz]) or

Status Word 411 (data type uInt), the status of the frequency inverter is

Frequency inverter

Master

(e.g. PC)

R S 2 3 2 / R S 4 8 5

Note: Control Word 410, Reference Frequency RAM 484 and Reference Per-

centage RAM

generally addressed via data set 0.

Note: External release:

− With the ACT-inverter the external release is done with a high logic

− This digital input has the highest priority and has to be hardwired.

control word, frequency reference, percentage reference

status word, motor speed, motor frequency

reference

C M - 2 3 2 / C M - 4 8 5

controller release

524 are stored in the RAM of the frequency inverter. This is

signal at the input S1IND.

external release

control

logic

inverter release

Modbus Instruction manual 05/0848

The frequency inverter can be controlled via three different operation modes. These

operation modes set via parameter

Note:

Local/Remote 412 Supported Operation Modes

Control via Con-

0 -

tacts

Control via State-

1 -

machine

Control via Remote

2 -

Contacts

Statemachine is a standardized software module within the controller of

The Start and Stop commands as well as the direction of rotation are controlled via digital signals.

The Start and Stop commands as well as the direction of rotation are controlled via the DRIVECOM Statemachine communication interface.

The Start and Stop commands as well as the direction of rotation are controlled via virtual digital signals through the communication protocol.

Local/Remote 412.

of the

the frequency inverter. The Statemachine maps specified operating statuses and the controller within the frequency inverter.

Note: − For operation via the serial interface, settings 0, 1 and 2 are relevant.

Further possible operation modes

Local/Remote 412 are described in

the frequency inverter operating instructions. These relate to the control via the control unit KP500 and the control via digital signals.

− Parameter

Local/Remote 412 is data set related, i.e. by selecting a

data set, you can switch over between the different operation modes.

For example, it is possible to control the frequency inverter via the serial interface and to activate a local emergency operation mode if the controller fails. This switch-over is also visible via the status word in bit "Remote".

The data set switch-over can be effected via control contacts at the digital inputs of

the frequency inverter or via the bus. For data set change-over via the bus, parameter

Data Set Selection 414 is used.

No. Name/Meaning Min. Max. Fact. Set.

414 Data Set Selection 0 4 0

With the default setting Data Set Selection 414 = 0, the data set change-over is done

via the digital inputs.

Data Set Selection 414 is set to 1, 2, 3 or 4, the selected data set is activated via

If the bus. At the same time, data set change-over via the digital inputs is deactivated.

Via parameter Active Data Set 249, the currently selected data set can be read out.

This is independent of whether the data set change-over was done via the digital inputs or via

Parameter Settings

Data Set Selection 414.

Modbus Instruction manual 4905/08

In the operation mode "Control via Contacts" (Local/Remote 412 = 0), the frequency

9.1 Control

9.1.1 Control via Contacts

inverter is addressed via the digital inputs S1IND ... S6IND, the multifunction input MFI1D as well as the additional inputs EM-S1IND … EM-S3IND (optional expansion modules). The function of these inputs is described in the frequency inverter operating instructions and the expansion module operating instructions.

Note: If the frequency inverter is addressed via digital inputs S1IND … S6IND,

addressing via the

Control Word 410 is not used in this operation mode.

Sequence in Statemachine:

Power-On

Initialization

Fault

Release On

Switched On

0x23

Operation

released

0x27

Acknowledge

Release Off

Fault

0x08

from any

status

The numbers indicated in the individual operating statuses (e.g. 0x23) signal the

corresponding feedback (e.g. switched on) via the status word (bit 0...6).

Modbus Instruction manual 05/0850

The parameter

Status Word 411 has a length of 16 bits. The set bits have the follow-

ing meaning:

Bit no. Function

Ready for being switched on

Switched on

Operation - released

Error

Voltage - disabled

Quick stop

Starting lock-out

Warning

–

Remote

Reference value reached

Limit value reached

–

Warning2

Status word 411

The status word reflects the operation state.

Status word HEX

Switched on

Operation released

Error

without consideration of bits 7 … 15!

"X" means any value ("0" or "1")

Bit 6 Bit 5 Bit 3 Bit 2 Bit 1 Bit 0

0x23 0 1 0 0 1 1

0x27 0 1 0 1 1 1

0x08 0 X

1 0 0 0

If a fault occurs, the fault status is activated.

Note: A fault can only be acknowledged 15 seconds after the occurrence of the

fault, i.e. after the internal blocking time has elapsed.

If a fault has occurred, the cause of the fault can be read out via parameter Cur-

rent Error

260.

Modbus Instruction manual 5105/08

Status Word Bit 7 to Bit 15

Bit 7, "Warning bit"

The warning bit "7" can signal an internal warning and results in the frequency inverter being switched off, depending on the cause. The evaluation of the warning is done by reading out the warning status via parame-

Warnings 270.

ter

Bit 9, "Remote"

The remote bit is always set to 0 in the case of the control via contacts.

Bit 10, "Reference value reached"

The bit "Reference value reached" is set when the specified reference value is reached. In the special case of power failure re power failure regulation reaches the frequency 0 Hz (see frequency inverter operating instructions). For "Reference value reached“ there is a hysteresis (tolerance ran via the parameter

Max. Control Deviation 549 (see frequency inverter operating

instructions).

Bit 11 "Limit active"

The bit Limit value active indicates that an internal limit is active. This may be the current limit, the torque limit or the overvoltage control. All functions result in the reference value being left or not reached.

Bit 15 "Warnung2"

The bit "Warning2" extends bit 7 "Warning bit" by the following information: Bit 15 signals a critical operating state which will result in a fault switch-off of the frequency inverter within a short time. This bit is set if there is a delayed warnin relating to the motor temperature, heat sink/inside temperature, Ixt monitoring or mains phase failure. If bit 15 is set, bit 7 is set, too.

gulation, the bit is also set when the

ge) which can be set

Modbus Instruction manual 05/0852

9.1.2 Control via Control Word of Statemachine

In this operation mode (Local/Remote 412 = 1), the frequency inverter is addressed

via the control word of the Statemachine. The possible states and transitions are shown in the diagram.

The states and transitions are marked by squares and arrows, respectively.

The numbers at the arrows identify the transitions between the states. The codes 0xnn at the transitions are the corresponding control word required (bit 0 … 7). The codes 0xnn indicated in the states, indicated the content of the status word (bit 0 ... bit 7).

Sequence in Statemachine:

Fault reaction active

9 0x00

8 0x06

Not ready

for being switched on

(Initialization)

Starting lock-out

0x40

2 0x06

Ready for

being switched on

0x21

3 0x07

Ready for

being switched on

0x23

4 0x0F

Operation released

(Drive working)

0x27

7 0x00

6 0x06

5 0x07

15 0x80

10 0x00

11 0x08

4 0x0F

Fault

0x08

12 0x00 or internal

Quick Stop

0x07

Modbus Instruction manual 5305/08

After mains on (Reset), the inverter is in the state "Starting lock-out" (0x40).

With transitions 4 and 5, there is a change between "Operation released“ (0x27, output stages released, drive working) and "Switched on“ (0x23, output stages disabled).

The release (transition 4) is only possible if the controller release signal and the corre-

sponding control command are present at digital external release AND (S2IND O S3IND). They can be firmly wired or also firmly linked to the logic states On or Off via the configuration of the digital inputs. If the control signal at the external release is withdrawn, the output stages can be disabled at any time. The drive then coasts to a standstill. In this case, there is a transition to "Switched on" (0x23, output stages disabled).

Note: External release has top priority for the controller release and is to be

hard-wired.

The behavior of Transition 5 can be set via parameter state-transition 5 392. Here,

you can use coasting, shut-off via ramp (reversible) or DC braking (depending on the selected configuration, see Chapter 9.1.2.2, “ Behavior in state-transition 5”).

Parameter Control Word 410 has a length of 16 bits. The set bits have the following

meaning:

Bit no. Function / name

Control Word 410

Switch on

Voltage - disable

Quick stop

Operation - released

–

Reset fault

–

Modbus Instruction manual 05/0854

Control Commands

The device control commands are triggered by the following bit combinations in pa-

rameter

Shutdown

Switch on

Voltage - disable

Quick stop

Operation - disable

Operation - released 0x0F

Reset fault

Control Word 410:

Control Commands

Command

"X" means any value ("0" or "1")

HEX Bit 7 Bit 3 Bit 2 Bit 1 Bit 0

0x06 X

0x07 X X 1 1 1 3

0x00 X X X 0 X 7, 9, 10

0x02 X X 0 1 X 11

0x07 X 0 1 1 1 5

0x80 0 Ö 1 X X X X 15

Control word

Transition

X 1 1 0 2, 6, 8

X 1 1 1 1 4

In order to facilitate the operation of the device, an additional feature was imple-

mented in the extension to the state machine defined under DRIVECOM. There is an additional transition 4 (0x0F) from "Starting lock-out" (0x040) to "Operation released" (0x27). Transition 4 is marked in the flow chart by a thick arrow.

The shaded areas show the commands relevant to the simplified Statemachine.

If a fault occurs, the "Fault" state is activated.

Note: If the command "Reset Fault" is executed, transition 15 takes place upon

a positive edge of bit 7! A fault can only be acknowledged 15 seconds after the occurrence of the fault, i.e. after the internal blocking time has elapsed.

Modbus Instruction manual 5505/08

The parameter

Status Word 411 has a length of 16 bits. The set bits have the follow-

ing meaning:

Bit no. Function

Status word 411

Ready for being switched on

Switched on

Operation - released

Error

Voltage - disabled

Quick stop

Starting lock-out

Warning

–

Remote

Reference value reached

Limit value reached

–

Warning2

The status word reflects the operation state.

Not ready for being switched on

Starting lock-out

Ready for being switched on

Quick stop

Switched on

Operation released

Error

Fault reaction active

without consideration of bits 7…15!

Status word

"X" means any value ("0" or "1")

HEX

0x00 0 X

0x40 1 X 0 0 0 0

0x21 0 1 0 0 0 1

0x07 0 0 0 1 1 1

0x23 0 1 0 0 1 1

0x27 0 1 0 1 1 1

0x08 0 X 1 0 0 0

0x0F 0 X 1 1 1 1

Bit 6 Bit 5 Bit 3 Bit 2 Bit 1 Bit 0

0 0 0 0

The shaded areas show the commands relevant to the simplified Statemachine.

Modbus Instruction manual 05/0856

Status Word Bit 7 to Bit 15

Bit 7, "Warning bit"

The warning bit "7" can come at any time. It signals an internal warning and results in the frequency inverter being switched off, depending on the cause. The evaluation of the warning is done by reading out the warning status via parame-

Warnings 270.

ter

Bit 9, "Remote"

The remote bit is set if the operation mode "Control via control word of Statemachine" (

Local/Remote 412 = 1) is set and the controller release signal is present at

external release and the start command is present at digital input S2IND or S3IND.

Logic link:

external release AND (S2IND/"Start clockwise" OR S3IND/"Start anticlockwise")

Note: The frequency inverter can only be addressed via the control word if the

hardware release is set and the remote bit

Local/Remote 412 = 1 is set.

Bit 10, "Reference value reached"

The bit "Reference value reached" is set when the specified reference value is reached. In the special case of power failure re

gulation, the bit is also set when the power failure regulation reaches the frequency 0 Hz (see frequency inverter operating instructions). For "Reference value reached“ there is a hysteresis (tolerance range) which can be set via the parameter

Max. Control Deviation 549 (see frequency inverter operating

instructions).

Bit 11 "Limit active"

The bit Limit value active indicates that an internal limit is active. This may be the current limit, the torque limit or the overvolta

ge control. All functions result in the

reference value being left or not reached.

Bit 15 "Warning2"

Modbus Instruction manual 5705/08

9.1.2.1 Behavior in Case of Quick Stop

In this case, the parameters Switch-Off Threshold 637 (percentage of parameter

Maximum Frequency 419) and Holding Time 638 (holding time after the value drops

below the switch-off limit) are relevant. In a quick stop, the drive is brou

Emergency Stop Clockwise 424 or Emergency Stop Anticlockwise 425).

(

ght to a standstill via the emergency stop ramps

Quick Stop

Switch-Off Threshold

Emergency Stop Clockwise

Emergency Stop Anticlockwise

Holding Time

637

424

425

638

Off

If frequency/speed reaches the value zero during the switch-off time, the drive con-

tinues to be supplied with current until the switch-off time has elapsed. This ensures that the drive is at a standstill when the state changes.

Change of Status

Modbus Instruction manual 05/0858

9.1.2.2 Behavior in state-transition 5 (from "Operation released" to "Switched on")

The behavior in transition 5 (from “Operation released” to “Switched on”) can param-

eterized via parameter

state-transition 5 392 function

0 – Coast to Stop

1 – DC-Brake

2 – Ramp

state-transition 5 392.

Immediate transition from "Operation released" to "Switched on", drive coasts to a standstill

Activation of DC brake, at the end of DC deceleration, there is the change from "Operation released" to "Switched on"

Transition at normal ramp, when the drive has come to a standstill, there is the change from "Operation released" to "Switched on"

Note: Setting 1 "DC-Brake" is only possible with applications with sensorless

control (e.g. configuration 110). Other configurations do not support this operation mode. If the frequency inverter is operated with a configuration which does not support the operation mode DC-Brake (e.g. configuration 210, fieldoriented control), value "1" cannot be used. In this case, the operation mode is not offered in the selection menus of the control unit KP500 and the control software VPlus.

The default value for state-transition 5 392 is operation mode 2 (ramp). For configu-

rations with torque control, the default value is 0 (coasting). If the configuration is changed, the value set for

state-transition 5 392 is also

changed, if necessary.

Note: If state-transition 5 392 was triggered with value 1 "Direct current

brake", a new control word will only be accepted after the transition process is complete. The change of state from "Operation released“ to "Switched on“ is done after the

Braking Time 632 parameterized for the

DC brake has elapsed.

If parameter state-transition 5 392 = 2 "ramp" is set, the control word can be set to

0x0F again, while the drive is decelerating. In this way, the drive accelerates to its set reference value again and remains in the state "Operation released".

The change of state from "Operation released" to "Switched on" is done after the

value has dropped below the set switch-off threshold and the set holding time has elapsed (equivalent to the behavior in the case of a quick stop). In this case, the parameters

mum Frequency

Switch-Off Threshold 637 (percentage of parameter Maxi-

419) and Holding Time stop function 638 (holding time after the

value drops below the switch-off limit) are relevant.

Modbus Instruction manual 5905/08

9.1.3 Control via Remote Contacts

In the operation mode Control via remote contacts ( quency inverter is addressed via parameter The digital inputs S1IND … S6IND and the multifunction input MFI1D of the frequenc inverter as well as inputs EM-S1IND … EM-S3IND of the optional expansion modules are emulated through Bit 0 … Bit 9 of parameter If the remote contacts are used, the inverter behaves in the same way as in the case of addressing via the di

gital inputs. For the function and the parameterization of these

inputs, refer to the frequency inverter operating instructions.

Note: A release is possible only if

− bit 0 of the control word is set to "1" and

− the release via hardware is set to “1”

Controller release via the software alone is not possible.

Sequence in Statemachine:

Power-On

Initialization

Local/Remote 412 = 2), the fre-

Control Word 410.

Fault

Release On

Switched On

0x23

Operation

released

0x27

Acknowledge

Release Off

Fault

0x08

from any

status

The numbers indicated in the individual operating statuses (e.g. 0x23) signal the

corresponding feedback via the status word (bit 0...6).

Note: Inputs which are set via the control word can be monitored via the control

unit KP500 or the control software VPlus by means of parameter

tal Inputs

250.

Digi-

Digital inputs are indicated as set only if the controller release signal is present and if bit 0 in the control word is set to "1".

Note: If data set change- over is used, make sure that the parameter Lo-

cal/Remote

412 is set to "2" (control via remote contacts) in all assigned

data sets.

Modbus Instruction manual 05/0860

Note: With the use of remote contacts the signal sources* are taken over from

the control word 410. Signals at the hardware contacts (terminals) are not evaluated by the standard operation modes (e.g. 71 for S2IND). For the evaluation of terminal signals special operation modes are available. They are denoted with the additional term “(Hardware)” and numbered from 526 to 546. Exception: The controller release via the hardware contact S1IND (terminal X210A.3) and Bit 0 “S1IND” of the

controlword

must be set.

It is not possible to release the controller only via software.

Signal sources are:

- S1IND ... S6IND,

- MFI1D,

- EM-S1IND ... EM-S3IND

Assignment of parameter

Bit no. Bit no.

* The logic state is “0” for ACT devices.

Control Word 410

S1IND

1 S2IND 1

2 S3IND 2

3 S4IND 3

4 S5IND 4

5 S6IND 5

6 MFI1D 6

7 EM-S1IND 7

8 EM-S2IND 8 –

9 EM-S3IND 9 Remote

10 – 10

11 – 11

12 – 12 –

13 – 13 –

14 – 14 –

15 – 15

Control Word 410 and actual value Status Word 411:

Bit no. Bit no.

Status Word 411

Ready for being switched on

Switched on

Operation - released

Error

Voltage – disabled*

Quick stop

Starting lock-out

Warning

Reference value reached

Limit value reached

Warning2

Modbus Instruction manual 6105/08

The status word reflects the operation state.

Status word

Switched on

Operation released

Error

without consideration of bits 7 … 15!

"X" means any value ("0" or "1")

HEX

) Bit 6 Bit 5 Bit 3 Bit 2 Bit 1 Bit 0

0x23 0 1 0 0 1 1

0x27 0 1 0 1 1 1

0x08 0 X

1 0 0 0

If a fault occurs, the fault status is activated.

Note: A fault can only be acknowledged 15 seconds after the occurrence of the

fault, i.e. after the internal blocking time has elapsed.

If a fault has occurred, the cause of the fault can be read out via parameter Cur-

rent Error

260.

Status Word Bit 7 to Bit 15

Bit 7, "Warning bit"

The warning bit "7" can signal an internal warning and results in the frequency

inverter being switched off, depending on the cause. The evaluation of the warning is done by reading out the warning status via parame-

Warnings 270.

ter

Bit 9, "Remote"

The "Remotebit" is set if the "Operation mode Control via remote contacts" is set

Local/Remote 412 = 2) and the external controller release is present. Only then can

( the frequency inverter be controlled via the control word.

Bit 10, "Reference value reached"

The bit "Reference value reached" is set when the specified reference value is reached. In the special case of power failure regulation, the bit is also set when the power failure re

gulation reaches the frequency 0 Hz (see frequency inverter operating instructions). For "Reference value reached“ there is a hysteresis (tolerance range) which can be set via the parameter

Max. Control Deviation 549 (see frequency inverter operating

instructions).

Bit 11 "Limit active"

The bit Limit value active indicates that an internal limit is active. This may be the current limit, the torque limit or the overvolta

ge control. All functions result in the

reference value being left or not reached.

Bit 15 "Warning2"

Modbus Instruction manual 05/0862

9.2 Reference Value

The following signal sources are available for determining the reference frequency:

9.2.1 Reference Frequency

− External reference value as reference line value from bus

− Internal reference value from the reference frequency channel

The reference line value with the parameter name Reference Frequency RAM 484 is

sent to the frequency inverter via the bus. The internal reference value reaches the frequency inverter via the reference frequency channel. The reference frequency channel is configured via parameter

ence Frequency Source

475.

Refer-

The actual value can be read back vie different parameters. The selection depends on the control method used and the application. The following parameters are possible,

− Stator Frequency 210 (data type long, Hz)

for example:

− Encoder 1 Frequency 217

(Speed Sensor 1 Frequency)

− Encoder 1 Speed 218 (Speed Sensor 1 Speed)

ramp function

(data type long, Hz)

(data type int, rpm).

Reference line value from Bus

Reference Frequency RAM

484

Internal reference value of reference frequency channel

Operation Mode

fmin

Ramp Setpoint

434

fmax

Ramp

Reference Ramp Frequency

283

The internal reference value from the reference frequency channel and the reference

line value (line setpoint) can be fed to the ramp individually or as an added variable. The result is available at the output of the ramp function as

ence Ramp Frequency

283.

Refer-

The operation mode of the ramp function is set via the data set related parameter

Ramp Setpoint 434.

For information on the reference frequency channel, refer to the frequency inverter

operating instructions.

Ramp Setpoint 434 Function

1 – Internal Setpoint

2 – Line Setpoint

3 – Internal + Line Setpoint

The internal reference frequency is determined from the reference frequency channel.

The reference value is supplied externally via the bus

Addition (considering the sign) of internal reference frequency and reference line value

Modbus Instruction manual 6305/08

For

Ramp Setpoint 434 = 3, the sign of the overall reference value is obtained from

the addition of the reference frequency + the reference line value.

Note: If Ramp Setpoint 434 = 2 (reference line value only), this reference line

value is limited to fmin. In this case, consider that the si

gn in front of fmin with reference value = 0 is derived from the sign in front of the last reference line value which was not 0. After Mains On, the reference line value is limited to +fmin (motor clockwise).

The reference values can be controlled at the frequency inverter via the control unit

KP500 or the control software VPlus via the following parameters:

- Internal Reference Frequency 228

- Reference Bus Frequency 282

- Reference Ramp Frequency 283

= internal ref. value from ref. freq. channel

= reference line value from serial interface

= sum of internal reference frequency +

reference line value

Note: If the serial interface of the communication module CM-232 / CM-485 is

connected to a PLC, for example, VPlus cannot access the frequency inverter via this interface directly. In this case, the PC must be connected via the optional interface adapte KP232.

For information on the reference frequency channel, refer to the frequency inverter

operating instructions.

Modbus Instruction manual 05/0864

The following signal sources are available for determining the reference percentage:

− External reference value as reference line value from bus

9.2.2 Reference Percentage

− Internal reference value from the reference percentage channel

The reference line value with the parameter name Reference Percentage RAM 524 is

sent to the frequency inverter via the bus. The internal reference value reaches the frequency inverter via the reference percentage channel. The reference percentage channel is configured via parameter

Percentage Source

The parameter

Reference line value of Bus

Reference Percentage

524

RAM

476.

Reference Percentage Value 229 can be read back as an actual value.

Rampfunction

Ramp

Reference

Reference percentage channel

229

Internal reference value of reference percentage channel

%max

The internal reference value from the reference percentage channel and the reference

line value are fed to the ramp as an added variable. The sum of the two variables has a positive or a negative sign according to the mathematical operation.

For information on the reference percentage channel, refer to the frequency inverter

operating instructions.

Note: − The actual value parameter Reference percentage 229 can be checked

at the frequency inverter via the control unit KP500 or the control software VPlus.

− For example, the

Reference Percentage Value 229 is processed in the

frequency inverter via the functions "Technology Controller" or "Torque Controller" (e.g. speed controller for torque limitation. For more information refer to the frequency inverter operating instructions.

Note: If the serial interface of the module CM-232/CM-485 is connected to a

PLC, for example, VPlus cannot access the frequency inverter via this interface directly. In this case, the PC must be connected via the optional interface adapte

KP232.

Modbus Instruction manual 6505/08

10 ACU Inverter Control/Reference Value

The frequency inverter can be controlled completely via the serial interface. The fol-

lowing parameters and actual values are used for this:

No. Name/Meaning min. max. fact. sett. type

Control Word 0x0000

410

Status Word

411

Reference Frequency RAM [Hz]

484

Reference Percentage RAM [%]

524

With the Control Word 410 (data type uInt), control commands are sent to the fre-

quency inverter, with the

Reference Percentage RAM 524 (data type Long [%]), the reference line value is

sent. Via the read out.

Parameter Settings

0xFFFF – uInt

0x0000 0xFFFF – uInt

-999.99 999.99 0.00 Long

-300.00 300.00 0.00 Long

Reference Frequency RAM 484 (data type Long [Hz]) or

Status Word 411 (data type uInt), the status of the frequency inverter is

Frequency inverter

Master

(e.g. PC)

R S 2 3 2 / R S 4 8 5

Note: Control Word 410, Reference Frequency RAM 484 and Reference Per-

centage RAM

generally addressed via data set 0.

Note: External release:

− The ACU inverter inputs STOA (S1IND) and STOB (S7IND) must be

− These digital inputs have the highest priority and have to be hard-

control word, frequency reference, percentage reference

status word, motor speed, motor frequency

524 are stored in the RAM of the frequency inverter. This is

enabled.

wired.

reference

C M - 2 3 2 / C M - 4 8 5

controller release

external release

control

logic

inverter release

Modbus Instruction manual 05/0866

The control of the frequency inverter can be done in principle with three operation modes. They are set via the data set change-over capable parameter

cal/Remote

412.

Lo-

No. Description Min. Max. Fact. sett. 412 Local/Remote 0 44 44

For operation, only the settings 0, 1 and 2 are relevant. The further settings relate to

the possibilities of control via the KP500 control unit.

Note: The parameter Local/Remote 412 is data set change-over capable. Thus,

The data set change-over can be done locally at the frequency inverter via di

inputs or via the bus. For the data set change-over via the bus, the parameter

Control mode Function

Control via digital in-

0 -

puts

Control via

1 -

state machine

Control via

2 -

remote digital inputs

set selection

Parameter Setting

The Start and Stop command as well as the statement of the direction of rotation are via digital input signals. The inverter is controlled by the Only in this control mode the motion control functions are supported by The Start and Stop command as well as the statement of the direction of rotation are via digital input signals emulated by the bits of the

switching over between various control modes via the data set selection is possible.

controlword

and

modes of operation

controlword

gital

Data

414 is used.

No. Description Min. Max. Fact. sett. 414 Data set selection 0 4 0

With Data set selection 414 = 0, the data set switch-over via digital inputs is active.

Data set selection 414 has been set to 1, 2, 3, or 4, the data set selected in this

If way has been activated. The data set switch-over via the digital inputs is then disabled.

Via the parameter Active data set 249 the data set currently selected can be read out.

Parameter Setting

Active data set 249 states the activated data set with the value 1, 2, 3 or 4. This is

independent of whether the data set change-over has been done via digital inputs or

Data set selection 414.

via

Modbus Instruction manual 6705/08

10.1 Control via contacts/remote contacts

In the operation mode control via digital inputs or remote digital inputs (parameter

Local/Remote 412 = 0 or 2) the frequency inverter is controlled via the digital inputs

Bit No. Name Bit No. Name 0 S1IND 0 Ready to switch on 1 S2IND 1 Switched on 2 S3IND 2 Operation enabled 3 S4IND 3 Fault 4 S5IND 4 Voltage enabled 5 S6IND 5 Quick stop 6 MFI1D 6 Switch on disabled 7 EM-S1IND 7 Warning 8 EM-S2IND 8 - 9 EM-S3IND 9 Remote 10 - 10 Target reached 11 - 11 Internal limit active 12 - 12 - 13 - 13 - 14 - 14 - 15 - 15 Warning 2

Note: When using the control mode “control via remote digital inputs” the control-

Note: ACTIVE CUBE inverters support an external 24V supply for control logic. Even

S1IND, S2IND to S6IND directly or by digital input emulation with help of the single bits in the

controlword

. The meaning of these inputs can be seen from the operating

instructions.

Controlword

Stateword

(Local/Remote 412= 2)

ler release via STOA (terminal X210A.3) and STOB (terminal X210B.2) must be set AND bit 0 of

controlword

must be set to get the drive started.

The two control modes digital inputs and remote digital inputs facilitate the

mode of operation

“velocity mode” only.

if the mains are not switched on the communication between PLC and inverter can be established.

The bit 4 “Voltage enabled” of the

statusword

displays the current state of

the mains power supply.

Bit 4 “Voltage enabled” = 0 signals “no mains voltage” and the drive start is disabled.

Bit 4 “Voltage enabled” = 1” signals “mains voltage switched on” and the drive is ready to start.

Modbus Instruction manual 05/0868

Note: With the use of remote contacts the signal sources* are taken over from

“S1IND”

Signal sources are:

- S1IND ... S6IND,

- MFI1D,

- EM-S1IND ... EM-S3IND

nal X210A.3) and STOB (terminal X210B.2) must be set and Bit 0

controlword

of the It is not possible to release the controller only via software.

must be set.

Modbus Instruction manual 6905/08

State machine:

not ready to

swi tch on

quitt fault

stop dri ve

fault

start drive

swi tch ed on

operation

enabled

Stateword Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Switched on 1 0 0 0 1 1 Operation enabled 1 1 0 1 1 1 Fault x x 1 x x x

Note: Bits marked “x” are don’t care.

The Warning bit "Bit No. 7" can signal an internal warning and results in the fre-

quency inverter being switched off, depending on the cause. The evaluation of the warning is done by reading out the warning status via parame-

Warnings 270.

ter

The bit Target reached "Bit No. 10" is set when the reference value specified has

been reached. In the special case of power failure regulation, the bit is also set if the power failure regulation has reached the frequency 0 Hz (see operating instructions). For "Reference value reached“ there is a hysteresis (tolerance range), which can be set via the parameter

max. Control deviation 549 (see operating instructions).

The bit Internal limit active "Bit No. 11" displays that an internal limit is active.

This can, for example, be the present current limit, the torque limit or the overvoltage limit. All the functions lead to the reference value being quit or not reached.

The bit Warning 2 "Bit No. 15" reports a warning which leads to a fault switch-off

of the frequency inverter within a short time. This bit is set if there is a warning for motor temperature, heat sink/inside temperature, Ixt monitoring or mains phase failure.

Modbus Instruction manual 05/0870

In the operation mode “control via state machine” (parameter Local/Remote 412 = 1)

The behavior of transition 5 can be set via the parameter State transition 5 392.

Control word 410 Status word 411 Bit Meaning Bit Meaning 0 Switch on 0 Ready to switch on 1 Enable voltage 1 Switched on 2 Quick stop 2 Operation enabled 3 Enable operation 3 Fault 4 5 6 7 Fault reset 7 Warning 8 9 10 11 12 13 14 15

Bits 9 … 15 unused Bit 14 unused

Note: ACTIVE CUBE inverters support an external 24V supply for control logic. Even

10.2 Control via state machine

the frequency inverter is controlled via

State transition 4 to state “Operation enabled” is only possible when:

Motion control configuration ( Î controller release at STOA and STOB is set.

In other configurations (non motion control, Î controller release at STOA and STOB is set AND (S2IND OR S3IND) (S2IND = start clockwise/S3IND = start anticlockwise)

Here, free stopping, shutdown via ramp (reversible) or DC braking (see Chapter "Behavior in transition 5") can be used.

Operation mode specific Operation mode specific Operation mode specific

Halt Operation mode specific Reserved Manufacturer specific Manufacturer specific Manufacturer specific Manufacturer specific Manufacturer specific

Controlword

control configurations (

Statusword

tions (

bits 12 + 13

Configuration 30 = x40) only.

if the mains are not switched on the communication between PLC and inverter can be established.

The bit 4 “Voltage enabled” of the the mains power supply.

Bit 4 “Voltage enabled” = 0 signals “no mains voltage” and the state tran- sision “Ready to switch on” Î “Switched on” is not possible.

Bit 4 “Voltage enabled” = 1” signals “mains voltage switched on” and the state transition “Ready to switch on” Î “Switched on” is possible.

bits 4, 5, 6

Configuration 30 = x40) only.

controlword

Configuration 30 = x40):

Configuration 30 ≠ x40):

4 Voltage enabled 5 Quick stop 6 Switch on disabled

8 Manufacturer specific

9 Remote 10 Target reached 11 Internal limit active 12 13 14 15

operation mode specific

statusword

Operation mode specific Operation mode specific Manufacturer specific Manufacturer specific

and bit 8

are used in motion control configura-

halt

displays the current state of

Warning2

are used in motion

Modbus Instruction manual 7105/08

State machine:

Entry in state machine

Not ready to

switch on

from all state

Fault reaction

active

Enable operation

4’

Disab le volta ge

Shutdown

Swi tch on

Ena ble opera tion

Swi tch on

2 7

Ready to

switch on

Switched on

Operation

disabled

enabled

Dis able v oltage or Quick stop

Shutdown

Disab le

opera tion

Fault reset

Qui ck st op

Faul t

Quic k stop

active

The device control commands are triggered by the following bit pattern in the

word

control-

Command

Bit 7 Bit 3 Bit 2 Bit 1 Bit 0

Fault reset

Controlword

Enable

operation

Quick

stop

Enable

voltage

Switch on

Transitions

Shutdown X X 1 1 0 2, 6, 8 Switch-on X 0 1 1 1 3 Switch on X 1 1 1 1 3 Disable voltage X X X 0 X 7, 9, 10, 12 Quick stop X X 0 1 X 7, 10, 11 Disable operation X 0 1 1 1 5 Enable operation X 1 1 1 1 4 Fault reset 0 Ö 1 x x x x 15 Bits marked X are irrelevant

Note: The state transition 3 (command “Switch on”) is processed only if bit no. 4

“Voltage enabled” of the

statusword

is set.

The state transition 4’ is only available for non motion control configura-

Configuration 30 ≠ x40) and is processed only if bit no. 4 “Voltage

tions ( enabled” of the

statusword

is set. This function is for downward compati-

bility to older software versions.

Modbus Instruction manual 05/0872

The

statusword

Switch on disabled 1 X 0 0 0 0 Ready to switch on 0 1 0 0 0 1

displays the operation state.

Bit 6 Bit 5 Bit 3 Bit 2 Bit 1 Bit 0

Switch on

state

disabled

Statusword

Quick stop Fault Operation

enabled

Switched onReady to

switch on

Switched on 0 1 0 0 1 1 Operation enabled 0 1 0 1 1 1 Quick stop active 0 0 0 1 1 1 Fault reaction active 0 X 1 1 1 1 Fault 0 X 1 0 0 0 Bits marked X are irrelevant

The Warning bit "Bit No. 7" can be set at any time. It displays a device-internal

warning message. The evaluation of the warning reason is done by readin warning status with the parameter

Warnings 270.

g out the

The Remote bit "Bit No. 9" is set if the operation mode control via state machine

Local/Remote 412 = 1) has been set and the hardware release is available.

(

Logic linking of the digital control signals:

STOA AND STOB AND (Start clockwise OR Start anticlockwise)

Only if the lo

for Start clockwise / Start anticlockwise can be connected directly

68, Start Aniclockwise.69).

wise

gic linking is true the inverter can be controlled via the. The logic inputs

to ON (Start Clock-

Note: For motion control configurations (

Configuration 30 = x40) only the digital

input S1IND must be set. Start clockwise and start anticlockwise have no function in motion control configurations.

The bit Target reached reached "Bit No. 10" is set when the reference value

specified has been reached. In non motion control configurations ( related to the reference speed object 0x6042

Configuration 30 ≠ x40) target reached is

target velocity

. In the special case of power failure regulation, the bit is also set if the power failure regulation has reached the frequency 0 Hz (see operating instructions). For "Target reached“ there is a hysteresis (tolerance range), which can be set via the parameter

max. Control deviation

549 (see operating instructions).

The bit Internal limit active “Bit No. 11” displays that an internal limit is active.

This can, for example, be the present current limit, the torque limit or the overvoltage limit. All the functions lead to the reference value being quit or not reached.

The bit Warning 2 “Bit No. 15” reports a warning which leads to a fault switch-off

of the frequency inverter within a short time. This bit is set if there is a warning for motor temperature, heat sink/inside temperature, Ixt monitoring or mains phase failure.

Modbus Instruction manual 7305/08

10.2.1 Behavior in quick stop

In this, the parameters Switch-off threshold 637 (percent of fmax) and Holding

638 (holding time after falling short of the switch-off threshold) are relevant. In

time

a quick stop, the drive is shutdown via the emergency stop ramps (

clockwise

424 or Emergency stop anti-clockwise 425).

Emergency stop

Start quick stop

Emergency stop anticlockwise

Emergency stop clockwise

424

425

Switch-off threshold.

Holding time

637

638

OFF,

status changed

If frequency/speed zero has been reached during the holding time, the drive contin-

ues to be supplied with direct current until the switch-off time has expired. With this measure, there is an assurance that the drive is stationary in a change of state.

Note: The “behavior in quick stop” is only relevant for non motion control con-

figurations (

Configuration 30 ≠ x40).

Modbus Instruction manual 05/0874

The behavior in transition 5 from "Operation enabled" to "Switched on" can be param-

10.2.2 Behavior in transition 5

eterized. The behavior is set via parameter

Parameter Setting

State transition 5 392.

No. Description Min. Max. Fact. sett. 392 State transition 5 0 2 2

Operation mode Function

0 - Coast to stop

1 - DC brake

immediate transition from "Operation enabled“ to "Switched on“, free stoppage of the drive activation of DC brake, with the end of DC braking, there is the change from "Operation enabled“ to "Switched on“ transmission with normal stop ramp, after reaching stand-

2 - Ramp

still, there is a change from "Operation enabled“ to "Switched on“

Note: Setting operation mode "1 - DC brake“ is only possible in applications with

v/f characteristic (e.g. configuration 110), as other applications do not know such an operation mode. If the frequency inverter is operated with a confi

guration which does not know the DC braking operation mode (e.g. configuration 210, fieldorientation speed controlled), value "1" cannot be set. It is also not offered in the selection menus of the KP500 control unit or the VPlus program.

Note: The default value for the parameter State transition 5 392 is operation

mode "2 – Ramp". For configurations with torque control, the default value is operation mode "0 - Coast to stop". In a switch-over of the configuration, the setting value for

State transition 5 392 is also altered if

necessary.

Note: The “behavior in transition 5” is only relevant for non motion control con-

figurations (

Configuration 30 ≠ x40).

If transition 5 has been triggered with State transition 5 392 = "1 - DC brake“, a new

control word is only accepted after the completion of the transition process. The change of state from "Operation enabled“ to "Ready“ is done after the expiry of the

Braking time 632 parameterized for the DC brake.

time

If the parameter State transition 5 392 = "2 - Ramp“ has been set, the

controlword

can be set back to “Enable operation” during the stoppage of the drive. In this way, the drive runs back up to its set reference value and remains in the state "Operation enabled“.

The change of state from "Operation enabled“ to "Switched on“ is done after the set

switch-off threshold has been reached and expiry of the set holding time (equivalent to the behavior in a quick stop). In this, the parameters (percent of fmax) and

Holding time 638 (holding time after switch-off threshold

Switch-off threshold

637

reached) are relevant.

Modbus Instruction manual 7505/08

10.2.3 Reference value/actual value

The control (PLC) can set the frequency reference value for the frequency inverter via the parameter

The control (PLC) can set the percentage reference value for the frequency inverter via the parameter The value of the control will always be added to the local source value of

Percentage Source

Note: The Parameters Reference Frequency RAM 484 and Reference Percentage

Reference Frequency RAM 484.

Reference Percentage RAM 524.

476.

524 can only be written. Read access is not possible.

RAM

Reference

The use of the reference/actual value channel depends on the set configuration (con-

trol system). The actual value is generated from the correct source depending on the control system used.

The actual value can be read out via parameter Actual Frequency 241. In addition, the internal reference frequencies can be read out.

Ramp set-point

operation mode

434

please read the note !

reference line value

internal reference frequency

fmin

frequency ramp

fmax

The internal reference value from the reference frequency value channel and the ref-

erence line value can be fed to the ramp individually or as an added variable. Setting is done via the data set change-over capable parameter

Parameter Setting

No. Description Min. Max. Fact. sett. 434 Ramp set-point 1 3 3

1 - Internal setpoint (refer-

2 - Line setpoint (reference

Operation mode Function

Reference value from the sources of the percentage of

ence frequency value)

reference frequency value channel Reference value via a communication interface

line value)

3 - Internal + line setpoint Sum of internal reference frequency value and refer-

ence line value

Note: This function is only relevant for non motion control configurations (Con-

figuration

30 ≠ x40).

Ramp set-point 434.

Modbus Instruction manual 05/0876

Note: If Ramp set-point 434 = 2 (only reference line value), this reference line

value is limited to fmin. Please consider that the sign in front of fmin at reference value = 0 is derived from the sign in front of the last reference line value ≠ 0. After Power On, the reference line value is limited to +fmin!

For Ramp set-point 434 = 3, the sign in front of the overall reference

value results from the sum of internal reference frequency value and reference line value.

The reference values can be read out on the frequency inverter with the help of the

KP500 control unit or VPlus operating software.

Parameter Contents Format Internal reference fre-

quency

228

Reference bus frequency

Actual values

Internal reference value from frequency ref-

xxx.xx Hz erence value channel Reference line value. xxx.xx Hz

282

Reference ramp fre-

quency

283

Sum of internal + reference line value xxx.xx Hz

Modbus Instruction manual 7705/08

No. Name/Meaning Unit Display range Chapter

No. Name/Meaning Unit Setting range Chapter

11 Parameter List

The following tables contain parameters which are relevant to the CM-232 and CM-485

communication modules. For the other parameters, refer to the frequency inverter parameters.

The parameter is available in the four data sets.

The parameter value is set by the SETUP routine.

This parameter cannot be written when the frequency inverter is in operation.

For better clarity, the parameters have been marked with pictograms:

This parameter is not accessible via the control unit KP500 and the control soft-

ware VPlus; it is only accessible via the communication channel.

FUN, UFUN, PFUN

11.1 Actual Value Menu (VAL)

: rated values of the frequency inverter, ü: overload capacity of frequency inverter

Actual Values of the Frequency Inverter

Internal Reference Frequency

228

Reference Percentage Value

229

Active Data Set

249

Digital Inputs

250

Hz -1000.00 ... 1000.00 9.2.1, 10.2.3

% ± 300.00 9.2.2

– 1 ... 4 9, 10

– 0 ... 255 9.1.3

260

270

11.2 Parameter Menu (PARA)

Current Error

Warnings

Ref. Bus Frequency

282

Ref. Ramp Frequency

283

Status Word

411

Baud Rate

VABus SST Error Register

Program(ming)

State-transition 5

392

394 RS232/RS485 NodeID – 1 ... 30 5.2, 5.3

Protocol

395

412

410

Control Word

Local/Remote

– 0 ... 0xFFFF 9.1; 12.2

– 0 ... 0xFFFF (bit coded) 9.1; 12.1

Hz -1000.00 ... 1000.00 9.2.1, 10.2.3

– 0 .... 0xFFFF 9; 9.1

RS232 / RS485

– 1 ... 6 5.2, 5.3

Inverter Data

– 6.6

– 0 ... 9999 5.2, 5.3

Bus controller

– 0 ... 2

RS232 / RS485

– 0 … 3 6

Bus controller

– 0 ... 0xFFFF 9; 9.1

– 0 ... 44 9; 9.1,10, 10.1

9.1.2.2, 10.2,

10.2.2

Modbus Instruction manual 05/0878

No. Name/Meaning Unit Setting range Chapter

413 RS232/RS485 Watchdog Timer s 0 ... 10000 6.8

RS232 / RS485

Data Set Change-Over

414

424

425

434

484

524

549

632

Data Set Selection

– 0 ... 4 9, 10

Frequency Ramps

Emergency Stop Clockwise

Emergency Stop Anticlockwise

Ramp Setpoint

Hz/s 0.01 ... 9999.99 9.1.2.1, 10.2.1

– 1 ... 3 9.2.1, 10.2.3

Fixed Frequencies

Reference Frequency RAM

Hz -999.99 ... 999.99 9.2.1

Fixed Percentages

Reference Percentage RAM

% ± 300.00 9.2.2

Digital Outputs

Max. Control Deviation

% 0.01 ... 20.00 9.1, 10.1

Direct current brake

Braking Time

s 0.0 … 200.0

9.1.2.1, 9.1.2.2

Stopping Behavior

Switch-Off Threshold

637

Holding Time

638

% 0.0 ... 100.0

s 0.0 ... 200.0

9.1.2.1, 9.1.2.2,

10.2.1

9.1.2.1, 9.1.2.2,

10.2.1, 10.2.2

Modbus

1375

1376

Modbus Parity

Modbus Address

- 0 … 2

- 1 … 247

5.2.1, 5.3.1

5.2.2, 5.3.2

Modbus Instruction manual 7905/08

12 Annex

The various control methods and the hardware of the frequency inverter include func-

12.1 Warning Messages

tions which continuously monitor the application. In addition to the messages documented in the frequency inverter operating instructions, further warnin activated by the RS232/RS485 communication modules CM-232/CM-485. The bit-coded warning reports are issued via parameter the following pattern:

Bit no. Warning code Description

1 0x0002

2 0x0004

3 0x0008

5 0x0020

6 0x0040

7 0x0080

8 0x0100

9 0x0200

10 0x0400

11 0x0800

12 0x1000

13 0x2000

14 0x4000

15 0x8000

1) 2)

Bit 0 "Warning Ixt" is always set

− if bit 1 "Warning Short-Term Ixt“ or

− if bit 2 "Warning Long-Term Ixt" is set.

Note: The individual warnings are described in detail in the frequency inverter

operating instructions.

Note: In parameter

same time.

Example:

Warning Ixt

Short-Term Ixt

Warning Limit Heat Sink Temperature

Warning Motor Temperature

Warnings 270 according to

Warning Messages

0x0001 Warning Ixt

Warning Short-Term Ixt

Warning Long-Term Ixt

Warning Heat Sink Temperature Tk

0x0010 Warning Inside Temperature Ti

Warning I-limit

Warning Init

Warning Motor Temperature

Warning Phase Failure

Warning Motor Protection Switch

Warning Fmax

Warning Analog Input MFI1A

Warning Analog Input A2 (EM-S1INA)

Warning System Bus Slave Failure

Warning Udc

Warning V-belt

1) 2)

Warnings 270 several warnings can be displayed at the

Message Warning

code

Is set in Short-Term Ixt or Long-Term Ixt

Total

0x0001

0x0002

0x0008

0x0080

0x008B

g messages are

Remarks

Modbus Instruction manual 05/0880

Fault messages can be read out via parameter Current Error 260. The error code

12.2 Error Messages

stored following a fault comprises the error group FXX (high-byte, hexadecimal) and the code YY (low-byte, hexadecimal).

General Fault Message

Code Meaning

F00

No fault has occurred.

Overload

Code Meaning

Frequency inverter overloaded.

F01

Frequency inverter overloaded (60 sec), check load behavior.

Short-term overload (1 sec), check motor and application parameters.

Heat Sink

Code Meaning

F02

Heat sink temperature too high, check cooling and fan.

Temperature sensor defective or ambient temperature too low.

Inside

Code Meaning

F03

Inside temperature too high, check cooling and fan.

Inside temperature too low, check electrical cabinet heating.

Motor Connection

Code Meaning

F04

Motor temperature too high or sensor defective, check connection

S6IND.

Motor circuit breaker tripped, check drive.

The V-belt monitoring reports no load on the drive.

Phase failure, check motor and wiring.

Output Current

Code Meaning

F05

Overloaded, check load situation and ramps.

Short circuit or earth fault, check motor and wiring.

Overloaded, check load situation and current value limit controller.

Asymmetric motor current, check current and wiring.

Motor phase current too high, check motor and wiring.

Message from phase monitoring, check motor and wiring.

Modbus Instruction manual 8105/08

Code Meaning

F07

Code Meaning

F08

Code Meaning

F11

Code Meaning

F13

Code Meaning

F14

Code Meaning

F20

DC link voltage too high, check deceleration ramps and connected brake

Resistor.

DC link voltage too low, check mains voltage.

Power failure, check mains voltage and circuit.

Phase failure, check mains fuses and circuit.

Reference DC-Link Limitation 680 too low, check mains voltage.

Brake chopper

Motor chopper

DC link voltage

Trigger Threshold 506 too low, check mains voltage.

Trigger Threshold 507 too low, check mains voltage.

Electronics voltage

Electronics voltage 24 V too low, check control terminal.

Electronics voltage too high, check wiring of control terminals.

Output frequency

Output frequency too high, check control signals and settings.

Max. frequency reached by control, check deceleration ramps and

connected brake resistor.

Motor Connection

Earth fault on output, check motor and wiring.

IDC Compensation Limit 415 reached, check motor and cabling,

Set

increase limit, if necessary.

Minimum current monitoring, check motor and wiring.

Control Connection

Reference value on multifunctional input 1 faulty, check signal.

Overcurrent on multifunctional input 1, check signal.

Speed sensor signal defective, check connections S4IND and S5IND.

One track of the speed sensor signal is missing, check connections.

Direction of rotation of speed sensor wrong, check connections.

Communication

Communication watchdog RS232/RS485.

Note: In addition to fault messages mentioned, there are further fault mes-

sages. However these messages are only used for internal purposes and are not listed here. If you receive fault messages which are not listed here, please contact us !

Modbus Instruction manual 05/0882

0 00 NUL 43 2B + 86 56 V 1 01 44 2C , 87 57 W 2 02 STX 45 2D - 88 58 X 3 03 ETX 46 2E . 89 59 Y 4 04 EOT 47 2F / 90 5A Z 5 05 ENQ 48 30 0 91 5B [ 6 06 ACK 49 31 1 92 5C \ 7 07 BEL 50 32 2 93 5D ] 8 08 BS 51 33 3 94 5E ^ 9 09 TAB 52 34 4 95 5F _ 10 0A LF 53 35 5 96 60 ` 11 0B VT 54 36 6 97 61 a 12 0C FF 55 37 7 98 62 b 13 0D CR 56 38 8 99 63 c 14 0E 57 39 9 100 64 d 15 0F 58 3A : 101 65 e 16 10 59 3B ; 102 66 f 17 11 60 3C < 103 67 g 18 12 61 3D = 104 68 h 19 13 62 3E > 105 69 i 20 14 63 3F ? 106 6A j 21 15 NAK 64 40 @ 107 6B k 22 16 65 41 A 108 6C l 23 17 66 42 B 109 6D m 24 18 67 43 C 110 6E n 25 19 68 44 D 111 6F o 26 1A 69 45 E 112 70 p 27 1B ESC 70 46 F 113 71 q 28 1C 71 47 G 114 72 r 29 1D 72 48 H 115 73 s 20 1E 73 49 I 116 74 t 31 1F 74 4A J 117 75 u 32 20 SPACE 75 4B K 118 76 v 33 21 ! 76 4C L 119 77 w 34 22 „ 77 4D M 120 78 x 35 23 # 78 4E N 121 79 y 36 24 $ 79 4F O 122 7A z 37 25 % 80 50 P 123 7B { 38 26 & 81 51 Q 124 7C | 39 27 ' 82 52 R 125 7D } 40 28 ( 83 53 S 126 7E ~ 41 29 ) 84 54 T 127 7F DEL 42 2A * 85 55 U

Note: Often used values are marked gray.

12.3 ASCII Tabelle (0x00 – 0x7F)

Dec. Hex. Char. Dec. Hex. Char. Dec. Hex. Char.

Modbus Instruction manual 8305/08

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