Siemens Simatic SM331 Getting Started

SIMATIC SIMATIC SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA

SIMATIC

Preface

_____________

Requirements

_____________

Introduction

_____________

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA

Getting Started

Mechanical setup of the example station

_____________

Electrical connection

_____________

Configuration of the SIMATIC Manager

_____________

Testing the user program

_____________

Diagnostic interrupt

_____________

Hardware interrupt

_____________

Appendix

_____________

11/2006

A5E00253410-02

Safety Guidelines

This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger.

Danger

indicates that death or severe personal injury will result if proper precautions are not taken.

Warning

indicates that death or severe personal injury may result if proper precautions are not taken.

Caution

with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.

Caution

without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.

Notice

indicates that an unintended result or situation can occur if the corresponding information is not taken into account.

If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage.

Qualified Personnel

The device/system may only be set up and used in conjunction with this documentation. Commissioning and operation of a device/system may only be performed by qualified personnel. Within the context of the safety notes in this documentation qualified persons are defined as persons who are authorized to commission, ground and label devices, systems and circuits in accordance with established safety practices and standards.

Prescribed Usage

Note the following:

Warning

This device may only be used for the applications described in the catalog or the technical description and only in connection with devices or components from other manufacturers which have been approved or recommended by Siemens. Correct, reliable operation of the product requires proper transport, storage, positioning and assembly as well as careful operation and maintenance.

Trademarks

All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.

Disclaimer of Liability

We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions.

Siemens AG

Automation and Drives Postfach 48 48 90437 NÜRNBERG GERMANY

Order No.: A5E00253410-02 11/2006

1 Preface ................................................................................................................................................... 1-1

1.1 General ...................................................................................................................................... 1-1

2 Requirements ......................................................................................................................................... 2-1

2.1 Basics......................................................................................................................................... 2-1

3 Introduction............................................................................................................................................. 3-1

3.1 Example of an application.......................................................................................................... 3-1

4 Mechanical setup of the example station................................................................................................ 4-1

4.1 Mounting the example station.................................................................................................... 4-1

4.2 Mounting of analog module components................................................................................... 4-3

4.2.1 General ...................................................................................................................................... 4-3

4.2.2 Components of the SM331 ........................................................................................................ 4-4

4.2.3 Features of the analog modules ................................................................................................ 4-5

4.2.4 Measuring range modules ......................................................................................................... 4-6

4.2.5 Mounting the SM331 module..................................................................................................... 4-8

5 Electrical connection............................................................................................................................... 5-1

5.1 Overview .................................................................................................................................... 5-1

5.2 Wiring the power supply module and the CPU.......................................................................... 5-2

5.3 Wiring of the analog module ...................................................................................................... 5-4

5.3.1 Requirement............................................................................................................................... 5-4

5.3.2 Current transducer wiring - principle.......................................................................................... 5-4

5.3.3 Wiring of the analog module ...................................................................................................... 5-5

5.3.4 Test ............................................................................................................................................ 5-8

6 Configuration of the SIMATIC Manager.................................................................................................. 6-1

6.1 Creating a new STEP7 project................................................................................................... 6-1

6.1.1 Creating a new project ............................................................................................................... 6-1

6.1.2 CPU selection ............................................................................................................................ 6-3

6.1.3 Defining the basic user program................................................................................................ 6-4

6.1.4 Assigning the project name........................................................................................................ 6-5

6.1.5 Result S7 project is created ....................................................................................................... 6-6

6.2 Hardware configuration.............................................................................................................. 6-7

6.2.1 Creating the hardware configuration.......................................................................................... 6-7

6.2.2 Adding SIMATIC components.................................................................................................... 6-8

6.2.3 Configuring the analog module................................................................................................ 6-10

6.2.4 Test .......................................................................................................................................... 6-13

6.3 STEP 7 user program .............................................................................................................. 6-17

6.3.1 Tasks of the user program ....................................................................................................... 6-17

6.3.2 Creating a user program.......................................................................................................... 6-18

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

iii

Table of contents

7 Testing the user program........................................................................................................................ 7-1

7.1 Downloading system data and user program ............................................................................ 7-1

7.2 Visualization of the sensor values.............................................................................................. 7-3

7.3 Analog value representation ...................................................................................................... 7-8

8 Diagnostic interrupt................................................................................................................................. 8-1

8.1 Reading diagnostic information from a PG ................................................................................ 8-1

8.2 General diagnostics ................................................................................................................... 8-3

8.3 Channel dependent diagnostic interrupts .................................................................................. 8-4

8.3.1 There are five channel dependent diagnostic interrupts............................................................ 8-4

8.3.2 Configuration / programming error............................................................................................. 8-4

8.3.3 Common mode error.................................................................................................................. 8-4

8.3.4 Wire break.................................................................................................................................. 8-5

8.3.5 Underflow ................................................................................................................................... 8-5

8.3.6 Overflow ..................................................................................................................................... 8-6

9 Hardware interrupt.................................................................................................................................. 9-1

9.1 Hardware interrupt ..................................................................................................................... 9-1

A Appendix.................................................................................................................................................A-1

A.1 Source of the user program .......................................................................................................A-1

Index................................................................................................................................................ Index-1

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA

iv Getting Started, 11/2006, A5E00253410-02

Preface

1.1 General

Purpose of the Getting Started

The Getting Started gives you a complete overview of the commissioning of the analog module SM331. It assists you in the installation and configuration of the hardware of a 420mA sensor and the configuration with SIMATIC S7 Manager.

The intended readership of Getting Started is a novice with only basic experience in configuration, commissioning and servicing of automation systems.

What to expect

The procedures, from mounting the module to storing analog values in the STEP7 user program, are explained step-by-step and in detail based on an example. In the following sections you will be introduced to:

● Problem analysis

● Mechanical setup of the example station

● Electrical connection of the example station

● Configure hardware with SIMATIC Manager

● Creating a small user program with STEP7 which stores the read analog values in a data block

● Triggering and interpreting diagnostic and hardware interrupts

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

1-1

Preface

1.1 General

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Requirements

2.1 Basics

Basic Knowledge Required

No special knowledge of the field of automation technology is required in order to understand the Getting Started guide. As the configuration of the analog module is done with the software STEP7, proficiency in STEP7 would be advantageous.

Further information on STEP7 can be found in the electronic manuals that are supplied with STEP7.

You will also need to know how to use computers or PC-like equipment (such as programming devices) under Windows 95/98/2000/NT or XP.

Required hardware and software

The scope of delivery of the analog module consists of 2 parts:

● The module itself

● A front connector, which enables you to conveniently connect the power supply and the data cables.

Analog module components

Quantity Article Order number

1 SM 331, Electrically ISOLATED 8 AI, ALARM DIAGNOSTICS 6ES7331-7KF02-0AB0 1 20-pin FRONT CONNECTOR with spring contacts 6ES7392-1BJ00-0AA0

The general SIMATIC components required for the example are as follows: SIMATIC components of the example station

Quantity Article Order number

1 PS 307 Power Supply AC 120/230V, DC 24V, 5A 6ES7307-1EA00-0AA0 1 CPU 315-2 DP 6ES7315-2AG10-0AB0 1 MICRO MEMORY CARD, NFLASH, 4 MB 6ES7953-8LM00-0AA0 1 SIMATIC S7-300, RAIL L=530MM 6ES7390-1AF30-0AA0 1 Programming device (PD) with MPI interface and MPI cable

PC with corresponding interface card

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

depending on the configuration

2-1

Requirements

2.1 Basics

Software STEP7

Quantity Article Order number

1 STEP7 Software version 5.2 or later, installed on the

programming device.

6ES7810-4CC06-0YX0

The following current transducers can be used for the acquisition of analog signals: Current transducers

Quantity Article Order number

1 2-Wire current transducer depending on the

manufacturer

1 4-Wire current transducer depending on the

manufacturer

Note This "Getting Started" describes only the application of 4 – 20 mA current transducers in the

2-Wire or 4-Wire model. If you wish to use other transducers, you will need to wire and configure the SM331 differently.

General tools and materials:

Quantity Article Order number various M6-bolts and nuts (Length depending on the mounting position) commonly available 1 Screwdriver with 3,5 mm blade commonly available 1 Screwdriver with 4.5 mm blade commonly available 1 Side cutters and wire stripping tools commonly available 1 Tool for crimping wire-end ferrules commonly available X m Cable for grounding the mounting rail with 10 mm2 cross-

section, ring terminal with 6.5 mm hole, length appropriate for local requirements.

X m Flexible wire with 1mm2 diameter with fitting wire end sleeves,

form A in 3 different colors – blue, red and green

X m 3-wire power cord (AC 230/120V) with protective contact

socket, length according to local conditions.

1 Calibration device (measuring instrument for commissioning,

that can measure and supply current)

commonly available

depends on the manufacturer

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Introduction

3.1 Example of an application

Overview

You want to connect three analog inputs to your station. One of them should have a 2-wire current transducer and the other two should share a 4-wire current transducer.

You need failure diagnostic capabilities and want two sensors to be able to trigger hardware interrupts.

You have the analog input module SM331, AI8x12 Bit (order number 6ES7 331-7KF020AB0) available. The module is diagnostic and hardware interrupt capable and can process up to 8 analog inputs. The module is diagnostic and hardware interrupt capable and can process up to 8 analog inputs (e.g. 4- 20 mA; PT 100; thermocouple).

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3-1

Introduction

3.1 Example of an application

In the following sections you will be introduced to:

● Mechanical setup of the example station – General mounting instructions for S7-300 modules – Configuration of the SM331 for the two selected measurement transducer types

● Electrical connection of the example station – Wiring the power supply module and the CPU – Wiring of the analog module – Standard pin assignment of two measurement transducer types – Wiring of unused inputs

● Configuring the SIMATIC Manager – Using the project wizard – Completing the automatically generated hardware configuration – Integrating the supplied user program source

● User program testing – Interpreting the read values – Converting the measured values into readable analog values

● Utilizing the diagnostic capabilities of the SM331 module – Triggering a diagnostic interrupt – Evaluating the diagnostics:

● Application of hardware interrupts – Configuration of hardware interrupts – Configuration and analysis of hardware interrupts

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Mechanical setup of the example station

4.1 Mounting the example station

Overview

The setup of the example station is divided into two steps. First, the setup of the power supply and the CPU is explained. After becoming acquainted with the analog module SM331, the mounting of it is described.

Requirements

Before you can use the analog input module SM331, you need a basic setup of general SIMATIC S7-300 components.

The order of the mounting takes place from left to right:

● Power supply PS307

● CPU 315-2DP

● SM331

Instructions (without SM331)

step Graphic controller Description 1 Screw on the mounting rail (screw size: M6) so that at

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

least 40 mm space remains above and below the rail. When mounting it on a grounded steel panel or on a

grounded device mounting panel made of steel sheet, make sure you have a low impedance connection between the mounting rail and the mounting surface.

Connect the mounting rail with the protective conductor. An M6 protective conductor screw is provided on the mounting rail for this purpose.

4-1

Mechanical setup of the example station

4.1 Mounting the example station

step Graphic controller Description 3

Mounting the power supply:

• Hang the power supply on to the top end of the rail

• Screw it tight to the rail underneath

Connect the bus connector (delivered with the SM331) to the left connector on the back of the CPU

Mounting the CPU:

• Hang the CPU on to the top end of the rail

• Push it all the way left to the power supply

• Push it down

• Screw it tight to the rail underneath

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Mechanical setup of the example station

4.2 Mounting of analog module components

4.2.1 General

Overview

Before the actual mounting of the SM331 the module has to be completed with a front connector and the desired measurement mode of the inputs is set.

In this section, you will learn about:

● The components you need

● The properties of the analog input module

● What a measuring range module is and how it is configured

● Mounting a configured module

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

4-3

Mechanical setup of the example station

4.2 Mounting of analog module components

4.2.2 Components of the SM331

Overview

A functional analog module consists of the following components:

● Module SM331 (in our example 6ES7331-7KF02-0AB0)

● 20-pin front connector There are two different types of front connectors: – With spring contacts (order number 6ES7392-1BJ00-0AA0) – With screw contacts (order number 6ES7392-1AJ00-0AA0)

Figure 4-1 Components of the SM331

The scope of delivery of SM331

Components Module Labeling strips Bus connectors 2 cable ties (not in the picture) to tie the external wiring

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Mechanical setup of the example station

4.2 Mounting of analog module components

4.2.3 Features of the analog modules

Characteristics

● 8 inputs in 4 channel groups (each group with two inputs of same type)

● Measurement resolution adjustable for each channel group

● User defined measuring mode per channel group:

– Voltage – Current – Resistance – Temperature

● Programmable diagnostic interrupt

● Two channels with limit alarms (only channel 0 and channel 2 are configurable)

● Electrically isolated against backplane bus

● Electrically isolated against load voltage (exception: at least one module is set to position

The module is a universal analog module designed for the most commonly used applications.

The desired measuring mode should be set up directly on the module with the measuring range modules.

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

4-5

Mechanical setup of the example station

4.2 Mounting of analog module components

4.2.4 Measuring range modules

Terminal

The module SM331 has 4 measuring range modules (one per channel group). The measuring range modules can be set to 4 different positions (A, B, C or D).

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Mechanical setup of the example station

4.2 Mounting of analog module components

Positions of the measuring range modules

The position enables you to specify the transducer to be connected to the respective channel group.

Position Type of measurement A Thermocouple / resistance measurement B Voltage (factory setting) C Current (4-wire transducer) D Current (2-wire transducer)

In our example, a sensor with a 4 to 20mA 2-wire transducer is connected to channel group 1 at input 0.

A 4-wire transducer is connected to channel group 2 at inputs 2 and 3. Therefore, the first measuring range module should have position D and the second should

have position C.

Positioning of the measuring range modules

step Graphic controller Description 1

With a screwdriver, pull out the two measuring range modules

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

Turn the measuring range module to the desired position:

Plug the measuring range module back into the module

In our example, the module should have the following positions:

CH0,1: D CH2,3: C

4-7

Mechanical setup of the example station

4.2 Mounting of analog module components

Note When you use a 2-wire transducer, the electrical isolation against the load voltage is lost for

all the channels in the module (at least one measuring range module is set to position D)

4.2.5 Mounting the SM331 module

Proceed as follows

After you have prepared the analog module accordingly, mount it to the rail as well.

step Graphic controller Description 1

Mounting the SM331:

• Hang the SM311 to the top end of the rail

• Push it all the way to the left up to the CPU

• Push it down

• Screw it tight to the rail underneath

The example station is now mechanically mounted.

Mounting the front connector:

• Press the upper release button of the front terminal block

• Insert the front connector into the module until it snaps in

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Electrical connection

5.1 Overview

Overview

This chapter shows you how the various parts of the example station are electrically wired from the power supply to the analog module.

Warning You might get an electrical shock if the power supply PS307 is turned on or the power cord

is connected to the line. Always switch off power before you start wiring the S7-300.

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

5-1

Electrical connection

5.2 Wiring the power supply module and the CPU

Overview

Figure 5-1 Wiring the power supply module and the CPU

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Electrical connection

5.2 Wiring the power supply module and the CPU

The example station requires a power supply. The wiring is done as follows:

Step Graphic controller Description 1 Open the front panel covers of the power supply module

and CPU. 2 Unscrew the cable grip on the power supply 3 Remove the insulation from the power cord, attach the cable

end sleeves (for stranded conductors) and connect it to the

power supply

4 Screw down the clamp of the cable grip.

5 Insert two connecting cables between the power supply and

the CPU and tighten them

6 Verify that the setting of the selector switch matches your

mains voltage.

The default line voltage setting for the power supply module

is 230 VAC. To change this setting, proceed as follows:

Remove the protective cap with a screwdriver, set the

selector switch to match your line voltage, then insert the

protective cap again.

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

5-3

Electrical connection

5.3 Wiring of the analog module

5.3.1 Requirement

General

The wiring of an analog measurement transducer is depends on its type and not on the SM331 module.

5.3.2 Current transducer wiring - principle

Options

Depending on the current transducer you use, you have to modify the wiring of the power supply. We differentiate between the wiring of a 2-wire current transducer and a 4-wire current transducer.

Wiring principles of a 2-wire current transducer

This transducer type is supplied with power from the analog input module.

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Electrical connection

5.3 Wiring of the analog module

Wiring principles of a 4-wire current transducer

Unlike a 2-wire transducer, this transducer has its own power supply.

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5.3.3 Wiring of the analog module

Tasks

The wiring of the analog module consists of the following tasks:

● Connecting the power supply (red cable)

● Connecting the 2-wire current transducer (green cables)

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● Terminating unused channels with a resistor

● Connecting the 4-wire current transducer (green cables)

● Connecting to ground and short-circuiting the other unused channels (blue wires)

SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA Getting Started, 11/2006, A5E00253410-02

5-5

Electrical connection

5.3 Wiring of the analog module

SM331 Front connector wiring

Figure 5-4 SM331 Front connector wiring

Notice Possible destruction of the module! If you connect a defective 4-wire current transducer to an input, which is configured for a 2-

wire transducer, the module may be destroyed!

The required wiring tasks are explained below step-by-step:

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+ 54 hidden pages

Siemens Simatic SM331 Getting Started

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Guidelines

Table of contents

Preface

1.1 General

Requirements

2.1 Basics

Introduction

3.1 Example of an application

Mechanical setup of the example station

4.1 Mounting the example station

4.2 Mounting of analog module components

4.2.1 General

4.2.2 Components of the SM331

4.2.3 Features of the analog modules

4.2.4 Measuring range modules

4.2.5 Mounting the SM331 module

Electrical connection

5.1 Overview

5.2 Wiring the power supply module and the CPU

5.3 Wiring of the analog module

5.3.1 Requirement

5.3.2 Current transducer wiring - principle

5.3.3 Wiring of the analog module