Lika XAC80 PB User Manual

User's guide

XAC80 PB

ATEX certification category 3 for use in zones 2, 22 and temperature class T5 (T100°C)

• 18-bit singleturn encoder for high precision demands

• 27-bit multiturn encoder for standard purposes

• 30-bit multiturn encoder for high end applications

• Profibus DP configurable as Class 1, Class 2 or Class 2(+VEL) Slave

• Heavy-duty construction for harsh environments

Suitable for the following models:

• XAC8018/1PB

• XAC8013/16384PB

• XAC8016/16384PB

General Contents

1 - Safety summary 17 2 - Identification 19 3 – Certificates 20 4 - Mounting instructions 25 5 - Electrical connections 27 6 - Quick reference 32 7 - Profibus® interface 39 8 - Default parameters list 57

Lika Electronic • Tel. +39 0445 806600 • info@lika.biz • www.lika.biz

Smart encoders & actuators

II 3GD, Ex nA IIB T5 Gc II 3GD, Ex tc IIIC T100°C Dc, IP65

Profibus-DP profile for encoders

This document and information contained herein are the property of Lika Electronic s.r.l. and shall not be reproduced in whole or in part without prior written approval of Lika Electronic s.r.l. Translation, reproduction and total or partial modification (photostat copies, film and microfilm included and any other means) are forbidden without written authorisation of Lika Electronic s.r.l.

The information herein is subject to change without notice and should not be construed as a commitment by Lika Electronic s.r.l. Lika Electronic s.r.l. reserves the right to make all modifications at any moments and without forewarning.

This manual is periodically reviewed and revised. As required we suggest checking if a new or updated edition of this document is available at Lika Electronic s.r.l.'s website. Lika Electronic s.r.l. assumes no responsibility for any errors or omissions in this document. Critical evaluation of this manual by the user is welcomed. Your comments assist us in preparation of future documentation, in order

to make it as clear and complete as possible. Please send an e-mail to the following address info@lika.it for submitting your comments, suggestions and criticisms.

User's guide......................................................................................................................................................... 1

Table of Contents............................................................................................................................................ 3

Subject Index................................................................................................................................................... 5

Typographic and iconographic conventions.............................................................................................6

Preliminary information................................................................................................................................ 7

Glossary of Profibus terms........................................................................................................................... 8

1 - Safety summary..................................................................................................................................... 17

1.1 Safety........................................................................................................................................................................................17

1.2 Electrical safety....................................................................................................................................................................17

1.3 Mechanical safety...............................................................................................................................................................18

1.4 Operational safety...............................................................................................................................................................18

2 - Identification.......................................................................................................................................... 19

3 – Certificates............................................................................................................................................. 20

3.1 Declaration of ATEX Conformity...................................................................................................................................20

3.2 EU Declaration of Conformity.......................................................................................................................................22

3.3 Safety instructions..............................................................................................................................................................23

4 - Mounting instructions......................................................................................................................... 25

4.1 Encumbrance sizes..............................................................................................................................................................25

4.2 Mounting the encoder......................................................................................................................................................26

5 - Electrical connections........................................................................................................................... 27

5.1 Connection cap....................................................................................................................................................................27

5.2 Connection cap with PG gland (cable output).......................................................................................................28

5.3 Ground connection............................................................................................................................................................28

5.3.1 Connection of the shield.........................................................................................................................................29

5.4 Setting the node number: DIP A (Figure 2)..............................................................................................................29

5.5 Baud rate................................................................................................................................................................................ 30

5.6 Bus termination resistance (Figure 2)........................................................................................................................31

6 - Quick reference...................................................................................................................................... 32

6.1 STEP7 configuration...........................................................................................................................................................32

6.1.1 Importing the GSD file..............................................................................................................................................32

6.1.2 Adding a node to the project.................................................................................................................................33

6.1.3 Encoder configuration parameters.....................................................................................................................34

6.2 Reading the diagnostic information...........................................................................................................................35

6.3 Setting the Preset value...................................................................................................................................................37

7 - Profibus® interface................................................................................................................................ 39

7.1 GSD file....................................................................................................................................................................................39

7.2 Classes of the Device profile...........................................................................................................................................39

7.3 Modes of operation............................................................................................................................................................40

7.3.1 Types of communication..........................................................................................................................................40

7.4 DDLM_Set_Prm....................................................................................................................................................................41

7.4.1 Byte 10 - Operating parameters...........................................................................................................................43

Code sequence..................................................................................................................................................................43

Class 2 functionality.....................................................................................................................................................43

Scaling function control.............................................................................................................................................44

Exchange type...................................................................................................................................................................44

7.4.2 Bytes 11 … 14...............................................................................................................................................................45

Counts per revolution..................................................................................................................................................45

7.4.3 Bytes 15 … 18...............................................................................................................................................................46

Total resolution................................................................................................................................................................46

7.4.4 Byte 19.............................................................................................................................................................................48

Velocity measure unit..................................................................................................................................................48

7.5 DDLM_Chk_Cfg....................................................................................................................................................................49

7.6 DDLM_Data_Exchange.....................................................................................................................................................49

Position value....................................................................................................................................................................49

Position and velocity values.....................................................................................................................................50

Preset value........................................................................................................................................................................50

7.7 DDLM_Slave_Diag..............................................................................................................................................................52

Station_Status_1..........................................................................................................................................................52

Station_Status_2..........................................................................................................................................................53

Station_Status_3..........................................................................................................................................................53

Master_Add.....................................................................................................................................................................53

Ident_Number................................................................................................................................................................53

Extended diagnostic header.....................................................................................................................................53

Alarms................................................................................................................................................................................53

Operating status............................................................................................................................................................54

Encoder type...................................................................................................................................................................54

Singleturn resolution...................................................................................................................................................54

Number of distinguishable revolutions...............................................................................................................54

7.8 "Dead Zone"...........................................................................................................................................................................55

8 - Default parameters list........................................................................................................................ 57

Subject Index

Alarms...................................................................................53

Class 2 functionality.......................................................43

Code sequence..................................................................43

Counts per revolution....................................................45

Encoder type......................................................................54

Exchange type...................................................................44

Extended diagnostic header........................................53

Ident_Number...................................................................53

Master_Add........................................................................53

Number of distinguishable revolutions..................54

Operating status...............................................................54

Position and velocity values........................................50

Position value....................................................................49

Preset value........................................................................50

Scaling function control...............................................44

Singleturn resolution......................................................54

Station_Status_1.............................................................52

Station_Status_2.............................................................53

Station_Status_3.............................................................53

Total resolution.................................................................46

Velocity measure unit....................................................48

Typographic and iconographic conventions

In this guide, to make it easier to understand and read the text the following typographic and iconographic conventions are used:

• parameters and objects of both Lika device and interface are coloured in GREEN;

• alarms are coloured in RED;

• states are coloured in FUCSIA.

When scrolling through the text some icons can be found on the side of the page: they are expressly designed to highlight the parts of the text which are of great interest and significance for the user. Sometimes they are used to warn against dangers or potential sources of danger arising from the use of the device. You are advised to follow strictly the instructions given in this guide in order to guarantee the safety of the user and ensure the performance of the device. In this guide the following symbols are used:

This icon, followed by the word WARNING, is meant to highlight the parts of the text where information of great significance for the user can be found: user must pay the greatest attention to them! Instructions must be followed strictly in order to guarantee the safety of the user and a correct use of the device. Failure to heed a warning or comply with instructions could lead to personal injury and/or damage to the unit or other equipment.

This icon, followed by the word NOTE, is meant to highlight the parts of the text where important notes needful for a correct and reliable use of the device can be found. User must pay attention to them! Failure to comply with instructions could cause the equipment to be set wrongly: hence a faulty and improper working of the device could be the consequence.

This icon is meant to highlight the parts of the text where suggestions useful for making it easier to set the device and optimize performance and reliability can be found. Sometimes this symbol is followed by the word EXAMPLE when instructions for setting parameters are accompanied by examples to clarify the explanation.

Preliminary information

This guide is designed to provide the most complete information the operator needs to correctly and safely install and operate the following encoders fitted with Profibus interface:

XAC8018/1PB-xx (18 bit singleturn encoder) XAC8013/16384PB-xx (13 +14 bit multiturn encoder) XAC8016/16384PB-xx (16 +14 bit multiturn encoder)

For technical specifications please refer to the product datasheet.

To make it easier to read the text, this guide can be divided into some main sections.

In the first section (from chapter 1 to chapter 4) general information concerning the safety, the mechanical installation and the electrical connection.

In the second section (chapter 5) information on how to install and configure the encoder under the Siemens STEP7 development environment as well as tips for setting up and running properly and efficiently the unit are provided.

In the third section (chapters 6 and 7) both general and specific information is given on the Profibus interface. In this section the interface features and the parameters implemented in the unit are fully described.

Glossary of Profibus terms

Profibus, like many other networking systems, has a set of unique terminology. Table below contains a few of the technical terms used in this guide to describe the Profibus interface. They are listed in alphabetical order.

Address (Station)

IEC 61158-2: Medium attachment unit identification - unique number of a station connected to a segment (participant).

Address Space

Within PROFIBUS DP the maximum possible number of addressable network nodes per segment, e.g. 127.

Alarm

Notification of an abnormal or unexpected event within a system. Alarms in PROFIBUS DP require in addition to the standard diagnosis event mechanism within the cyclic data exchange a separate acyclic acknowledgement procedure between a host and a Slave application. Since DP-V1, "Device related diagnosis" is the basis for the "Alarm" and "Status" types of diagnosis events (GSD: "DPV1"=1). PROFIBUS DP defines the following alarm types: Diagnosis, Status, Process, Update, Pull and Plug Alarm. See "Device Related Diagnosis". The PNO maintains a Profile Guideline, Part3: Diagnosis, Alarms and Time Stamping, order no. 3.522.

Alert

Alert is a generic term for two different types of notifications within a PROFIBUS DP/PA network especially arranged but not exclusively for the process automation:

• alarm;

• event.

Both alert types may be used with or without a user acknowledgement mechanism. The PNO maintains a PROFIBUS guideline "Time Stamp", order no. 2.192.

Application Profile

Within PROFIBUS a specified agreement within families of field devices on how to use the general PROFIBUS communication platform and its subsystems (e.g. device integration via GSD, EDD, FDT/DTM and Communication Function Blocks). Communication profiles are not a part of the PROFIBUS DP application profiles. See "Profile".

Baud rate (Data Rate)

Other common terms are "data transfer rate" and "transmission rate". Within PROFIBUS DP this is the amount of data transferred across a fieldbus segment per second. A data rate is measured in units of bits per second ( "b/s" or "bps"), or baud.

Bus Cycle

The period of time the bus Master needs to poll every participant (Slave) once. More bus Masters can be activated by using the token principle which consequently prolong the bus cycle.

Class

See “DP Master”, “DP Master Class 1 (DPM1)” and “DP Master Class 2 (DPM2)”.

Class 1 encoder

Encoder class must be set when you configure the device. Mandatory Class 1 provides the basic functions of the device and can be used for:

• sending the position value (see Position value parameter);

• changing the counting direction (see Code sequence parameter);

• setting the preset value (see Preset value parameter);

• acquiring reduced diagnostic information (see

Diagnostic type parameter = “16 bytes fixed (6+10)”).

Class 2 (+VEL) encoder

Encoder class must be set when you configure the device. Class 2 (+VEL) provides all the Class 1 and Class 2 functions and additional velocity-related functions:

• transmission of the velocity value (see Position and

velocity values parameter);

• setting of the velocity measuring unit (see Velocity

measure unit parameter).

Class 2 encoder

Encoder class must be set when you configure the device. Class 2 provides all the Class 1 functions and additional advanced functions such as:

• scaling function (see Scaling function control,

Counts per revolution and Total resolution

parameters);

• extended diagnostic information (see Diagnostic type parameter = “16 bytes (6+10)” or “63 bytes (6+57)”).

Communication Function Block (Comm FB)

A basic function block defined for PROFIBUS DP and supplied by the PLC manufacturer for the standardized access of user programs to field devices. The standardization is based on IEC 61131-3. The PNO maintains a guideline "PROFIBUS Communication and Proxy Function Blocks acc. to IEC 611313", order no. 2.182.

Communication Parameter

Communication parameters are parameters, which adjust the communication protocol function to the current net configuration. Communication parameters exist for all phases of the communication protocols. Examples are bus address, token rotation time, idle time. See "Slave parametrization" and "Device parametrization".

Communication Profile

IEC 61158 comprises a summary of layer stacks of several different fieldbusses. IEC 61784 defines the useful combinations of these stacks via communication profiles CPF3/1 up to CPF3/3 (PROFINET). One of these is PROFIBUS DP. Within this communication profile three different physical profiles are defined:

• RS 485 (RS 485-IS);

• MBP-IS (MBP-LP, MBP);

• Fibre Optics.

Cyclic Data Exchange

IEC 61158-3: Term used to describe events which repeat in a regular and repetitive manner. The MS0 services of PROFIBUS DP are based on cyclic data exchange. See "State machine".

Cyclic Redundancy Check (CRC)

Error-checking technique in which the frame recipient calculates a remainder by dividing frame contents by a prime binary divisor and compares the calculated remainder to a value stored in the frame by the sending node.

Data Rate (Baud rate)

Decentralized Peripherals (DP)

The term "Decentralized Peripherals" and the acronym "DP" stand for the simple, fast, cyclic and deterministic I/O data exchange between a bus Master and its assigned Slave devices. The corresponding PROFIBUS communication protocol is called PROFIBUS DP.

Device Identifier

Ident number: The primary device identification is an ident number of data type Unsigned16. This number is unique and assigned by the PNO business office upon application. It is stored within the device and defined in the corresponding GSD file via keyword. In addition it is part of the GSD file name. At runtime the ident number is used within:

• the set Slave address procedure;

• the parametrization telegram (octet 5 + 6);

• the standard part of a diagnosis message (octet 5 + 6).

The ident number explicitly cannot be retrieved from a device. Its main purpose is to make sure that a GSD file and configuration/parametrization data between Master Class 1 and its Slave are matching. The PNO maintains a technical guideline "Specification for PROFIBUS device description and device integration, Volume 1: GSD", Version 5.0, order no.

2.122. For a secondary identification possibility see the identification & maintenance functions (I&M). See "Ident Number".

Device Parametrization

The device parametrization within PROFIBUS DP consists of three phases. The first phase takes place during start-up of the communication system and provides basic communication parametrization and simple additional device parameters. Both are defined within the GSD file of a device, stored within a Master Class 1 after configuration in an engineering tool, and transmitted to the Slave at start-up time. Most of the automation cases in factory automation are covered by this method. More complex devices such as drives, laser scanners, scales, robots, transmitters, etc. require further individual parametrization before final production start. This is done in a second phase. In process automation certain device

parameters such as value limits, value range, gain, etc. need to be adjusted even at run-time. For this second and third phase PROFIBUS DP provides two ways to accomplish the task: DTM/FDT and EDD. See "Slave parametrization" and "Communication parameter".

Device Profile

See "Profile".

DP Master

IEC 61158-5: Within PROFIBUS DP a fieldbus node that can be either Master Class 1 or Master Class 2. A Master Class 1 is a controlling device which controls several DP Slaves (field devices). NOTE: This is usually hosted by a programmable controller or a process controller. A Master Class 2 is a controlling device which manages configuration data (parameter sets) and diagnosis data of a DP Master Class 1, and that additionally can perform all communication capabilities of a DP Master Class 1.

DP Master Class1 (DPM1)

IEC 61158-5: A controlling device which controls several DPSlaves (field devices). Usually programmable (logic) controllers or process control systems are hosts for Master Class 1.

DP Master Class2 (DPM2)

IEC 61158-5: A controlling device which manages configuration data (parameter sets) and diagnosis data of a DP-Master (Class 1). Additionally the DP-Master (Class 2) can perform all communication capabilities of a DP-Master (Class

1). Usually personal computers are hosts for DP Master Class 2 for programming, parametrizing, diagnosing and monitoring purposes.

DP Slave

IEC 61158-5: A field device that is assigned to one DP Master Class 1 as a provider for cyclic I/O data exchange. In addition acyclic functions and alarms could be supported.

Event

Within PROFIBUS DP/PA this is a signal or I/O data or process value within a certain field device at that point in time where a trigger condition arises. The values are associated with a time stamp and stored in a buffer. The time-stamped sample values are used to archive and visualize significant changes over the course of the production process. Such an event mechanism does not prevent from the cyclic transmission of these signals. A separate event alarm is requesting the transfer of the events to the main system.

Frame

A single set of data transmission from a device.

General Station Description (GSD)

A GSD is an electronically readable ASCII text file and contains both general and device-specific parameters for communication and network configuration. By means of keywords, a configuration tool allows to:

• read device information (manufacturer, type, versions, bitmaps, etc.);

• read texts for comfortable and easy to use configuration;

• select transmission rates;

• select modules and their I/O data length

(configuration identifier);

• read texts to assign diagnosis IDs to HMI displays;

• select supported services (freeze, sync, etc.);

from the GSD for the configuration of the device. A GSD replaces the previously conventional manuals or data sheets and thus already supports plausibility checks during the configuration phase. Distinction is made between a device GSD (for an individual device only) and a profile GSD, which may be used for devices that comply exactly with a profile such as a "PA device". GSDs for different languages may be provided in separate files with corresponding file extensions (*.gse for English, *.gsg for German, etc.) or altogether in one file (*.gsd). The device manufacturers are responsible for the scope and quality of the GSD of their devices.

Ident Number

See "Device Identifier". Notes:

• the ident number is necessary for all DP devices except for Master Class 2;

• the same ident number may be used for modular devices as long as the device can be described in the GSD file as a modular device.

Identifier

In general: a symbol that establishes the identity of the one bearing it. Within this context here it represents an absolute value of a parameter such as a physical address. It is intended for systematic and performance handling capabilities within computer systems, e.g. sorting, consistency checking, physical localization and alike. Usually an absolute value is associated with a logical value to represent the particular deployment of the identifier. Typical abbreviation for identifier is ID. IEC 61131-3: A combination of letters, numbers and underline characters, which begins with a letter or underline and which names a language element. Some of the major identifiers within PROFIBUS DP are:

- Data type numeric identifier;

- Configuration identifier (Cfg);

- Device identifier (ident number);

- Manufacturer identifier (MANUFACTURER ID);

- Profile ident number (PROFILE ID).

Index

IEC 61158-5: Address of an object within an application process. The permitted range in PROFIBUS DP is 0 - 255. Indexes are used to address records of data (parameters, variables, state information, commands, etc.) within modules of a field device.

PDU (Protocol Data Unit)

A packet of data passed across a network via telegrams. The term implies a specific layer of the OSI seven layer model and a specific protocol. Each layer has its own PDU that is extended subsequently from the physical layer up to the application layer:

• Physical layer protocol data unit (PhPDU);

• Data link protocol data unit (DLPDU);

• Application protocol data unit (APDU).

The

PROFIBUS Nutzerorganisation e.V.

(PROFIBUS User Organisation, or PNO) was created in 1989. This group was composed mainly of manufacturers and users from Europe. In 1992, the first regional PROFIBUS organization was founded (PROFIBUS Schweiz in Switzerland). In the following years, additional Regional PROFIBUS & PROFINET Associations (RPAs) were added. In 1995, all the RPAs joined together under the international umbrella association PROFIBUS & PROFINET International (PI). Today, PROFIBUS is represented by 25 RPAs around the world (including PNO) with over 1400 members, including most if not all major automation vendors and service suppliers, along with many end users.

PNO

The

PROFIBUS Nutzerorganisation e.V.

PROFIBUS

PROcess FIeldBUS. PROFIBUS is a manufacturer independent fieldbus standard for applications in manufacturing, process and building automation. The PROFIBUS family is composed of three types of protocol, each of which is used for different tasks. The three types of protocols are: PROFIBUS FMS, DP and PA. IEC 61784-1: Communication network according to communication profile family 3 (CPF3); incorporating application profiles and system integration aspects like interfaces and languages for engineering tools and HMI. PROFIBUS is an open, digital communication system with a wide range of applications, particularly in the fields of factory and process automation. PROFIBUS is suitable for both fast, time-critical applications and complex communication tasks. The PROFIBUS logo is a registered trademark.

PROFIBUS DP

Acronym for "PROFIBUS for Decentralized Peripherals". Specification of an open fieldbus system with the following characteristics:

• polling Master-Slave-system (cyclic communications, MS0);

• flying Masters with robin round token passing coordination (MM);

• connection based (MS1) and connectionless (MS2, MS3) acyclic communication between Masters and Slaves.

Options (e.g.):

• Data exchange broadcast (DXB), i.e. Slave to Slaves communication;

• isochronous mode of Slaves;

• clock synchronization;

• redundancy.

PROFIBUS DP is standardized within IEC 61158 and IEC 61784, communication profile families 3/1 and 3/2. The term "PROFIBUS DP" is also a synonym for the RS-485 based deployments within factory automation.

PROFIdrive

Communication technology especially adopted to the requirements of position and speed controlled drive applications (e.g. speed synchronized axis). Within the scope of PROFIBUS, "PROFIdrive" is used for the application of the PROFIBUS DP protocol (DP-V2) in motion control automation together with the corresponding application profiles ("PROFIdrive - Profile for variable speed drives" and "PROFIdrive - Profile drive technology") for the transmission technology RS-485.

Profile

Besides other things profiles in common define agreements on how to use communication means in a standardized manner. Within the context of fieldbusses several types of profiles are known:

• communication profiles (e.g. IEC 61784);

• physical profiles (MBP-IS, RS-485);

• application profiles (see PROFIBUS TC3);

• device profiles (e.g. robots);

• branch profiles (e.g. extruder).

Profile Ident Number

Identifier of a particular profile definition. The profile ident number is taken from the pool of ident numbers handled by the PNO. It plays a role within the following scenarios. (1) In cases where the device of a manufacturer A should be replaceable by an equivalent device, the PNO is assigning number ranges to dedicated device types (Profile specific IDs) in combination with certain "Profile GSDs". Profiles using this methodology are e.g. "PA Devices" and "PROFIdrive". (2) Usually these Slave devices are designed to communicate with a Master Class 2 application (e.g. profile application or profile DTM). In order to ensure a Master application is communicating with an appropriate Slave, it is sending a profile specific ID during the establishment of the connection (MS2 Initiate Service). The Slave may answer with the same profile specific ID (if it is supporting this profile), with another ID (if it is supporting another profile) or with "0000h" if it is not supporting any profile. (3) I&M functions: Besides its basic I&M information devices -

following a certain profile - are enabled to provide more detailed profile specific information.

Protocol Data Unit (PDU)

• Physical layer protocol data unit (PhPDU);

• Data link protocol data unit (DLPDU);

• Application protocol data unit (APDU).

Slave Parametrization

For a DP Slave several levels of parametrization exist. (1) The parameters on the DP communication level can be defined via a GSD file and comprise features such as baud rates, timing constraints, identification, options, transferable data structures, publisher subscriber links, etc. This level supports parametrization of simple modular Slaves and also special common additional communication layers such as PROFIsafe. This parametrization is fixed for a given operational life cycle after start-up. (2) More complex devices may be parametrized via EDD and/or FDT/DTM technology via an acyclic communication service (MS2). (3) For parameter changes at run-time such as batch operation (recipes) or motion control, special "parameter channels" associated with the cyclic data structures may be added or the MS1 services together with proxy function blocks may be used.

State Machine (DP)

An abstract machine consisting of a set of states (including the initial state), a set of input events, a set of output events, and a state transition function. A state machine describes the behaviour of a field device how to react in different situations. The state machine for DP Slaves comprises the following states/actions:

- Power_On_Reset --> Set Slave address --> if successful, a transition follows to:

- Wait_Prm --> Parametrization, diagnosis (optional) --> if successful, a transition follows to:

- Wait_Cfg --> Configuration, diagnosis (optional) --> if successful, a transition follows to:

- Data_Exch --> Normal operation: cyclic data exchange. On top of this basic communication layer state machine application profiles are defining their own additional state machines, e.g. PA devices, PROFIdrive, PROFIsafe, Ident Systems, Weighing and Dosage Systems. State machines are best modelled and documented with the help of the "Unified Modelling Language (UML)".

Station Address

Within PROFIBUS DP the address of a communication participant (Master or Slave). The permitted range is 0 to 127, with:

- 126 intended to be used for the "soft" addressing of Slave devices;

- 127 intended to be used for broadcast messages to all the Slaves.

Topology

In a communication network, the pattern of interconnection between network nodes; e.g. bus, ring, star configuration.

Transmission Rate (Baud rate)

The signalling rate of a digital communication line. It is the switching speed, or number of transitions (voltage or frequency changes) that are made per second. Within PROFIBUS DP the possible transmission rates depend on the MAU (Medium Attachment Unit) in use.

Watchdog Control

IEC 61158-6: This timer is part of the DP layer within a Slave. It is restarted by received requests from the bus Master and will set the outputs of a Slave to a fail-safe state after the expiration of the timer.

Watchdog Time (Twd)

IEC 61158-5: The watchdog timer is part of the DP layer within a Slave. The watchdog time is set by parametrization at run-up and consists of a watchdog time base (1 or 10 ms) and 2 factors. A selection can be made during configuration via the GSD file of a Slave. This is a Slave parameter. See "Watchdog control".

XAC80 Profibus-DP

1 - Safety summary

1.1 Safety

 Always adhere to the professional safety and accident prevention regulations

applicable to your country during device installation and operation;

 installation and maintenance operations have to be carried out by qualified

personnel only, with power supply disconnected and stationary mechanical parts;

 device must be used only for the purpose appropriate to its design: use for

purposes other than those for which it has been designed could result in serious personal and/or the environment damage;

 high current, voltage and moving mechanical parts can cause serious or fatal

injury;

 failure to comply with these precautions or with specific warnings elsewhere

in this manual violates safety standards of design, manufacture, and intended use of the equipment;

 Lika Electronic assumes no liability for the customer's failure to comply with

these requirements.

1.2 Electrical safety

 Turn off power supply before connecting the device;  connect according to explanation in the “5 - Electrical connections” section

on page 27;

 in compliance with the 2014/30/EU norm on electromagnetic

compatibility, following precautions must be taken:

- before handling and installing, discharge electrical charge from your body and tools which may come in touch with the device;

- power supply must be stabilized without noise, install EMC filters on device power supply if needed;

- always use shielded cables (twisted pair cables whenever possible);

- avoid cables runs longer than necessary;

- avoid running the signal cable near high voltage power cables;

- mount the device as far as possible from any capacitive or inductive noise source, shield the device from noise source if needed;

- to guarantee a correct working of the device, avoid using strong magnets on or near by the unit;

- minimize noise by connecting the shield and/or the frame to ground. Make sure that ground is not affected by noise. The connection point to ground can be situated both on the device side and on user’s side. The best solution to minimize the interference must be carried out by the user. Provide the ground connection as close as possible to the encoder. We suggest using the ground screw provided in the cap (see Figure 1);

 the rated supply voltage must not exceed 30Vdc;  in classified areas the electrical connection of the device must be carried out

in compliance with the methods stated in the EN 60079-0 regulation;

MAN XAC80 PB E 1.0.odt 1 - Safety summary 17 of 60

XAC80 Profibus-DP

 the user has to take suitable measures in order to prevent longer or

continuous disturbances that cause the supply voltage to exceed by 10% or more;

 the product must be protected against overheating due to mechanical or

electrical overloading.

1.3 Mechanical safety

 Install the device following strictly the information in the section “4 -

Mounting instructions”;

 mechanical installation has to be carried out with stationary mechanical

parts;

 do not disassemble the encoder;  do not tool the encoder or its shaft;  delicate electronic equipment: handle with care; do not subject the device

and the shaft to knocks or shocks;

 respect the environmental characteristics declared by manufacturer.

1.4 Operational safety

 The described products are category 3 certified and are designed for use in

potentially explosive zones 2 (according to EN60079-15) and 22 (according to EN60079-31). They are suitable for a safe use and a normal level of protection in areas in which explosive atmospheres caused by mixture of gases and vapors (zone 2) or dust (zone 22) are unlikely to occur and if they do occur do so for a short period of time. They comply with the constructional safety requirements of the temperature class T5 (T100°C = +212°F). They are not to be used in Zones 0, 1, 20 and 21;

 protection requirements: Zone 2, gas explosion protection (G): protection by

non sparking equipment: the construction minimizes the occurrence of sparks, arcs or hot surfaces, which in normal operation might give the risk of explosion; Zone 22, dust explosion protection (D): the construction of the product protects against the penetration of dust in hazardous quantities (min. IP5x) and guarantees that the surface temperature is under the ignition temperature of dust/air mixture as well as under the smoldering temperature of dust deposits;

 the manufacturer's specifications (temperature, speed, …) must under no

circumstances be exceeded;

 max. permissible environmental temperature: -20°C +40°C (-4°F +104°F) at

continuous rotational speed of max. 6000 rpm;

 the maximum surface temperature (in °C) of the product must not exceed

2/3 of the ignition temperature of the dust/air mixture;

 in continuous operation the plastic parts must be able to withstand a

temperature 10°C higher than the maximum temperature that can be reached in the hottest point of the product while the environmental temperature is the highest allowed during operation.

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