FMS EMGZ470A.W Manuale utente

Operating Manual

EMGZ470A.W / EMGZ472A.W

EMGZ470A.W.D / EMGZ472A.W.D

Digital microprocessor controlled Tension Measuring

Amplifier with integrated PROFIBUS interface

Operating Manual Version 2.3 04/2007 ff

Firmware Version from 1.04 08/2006

GSD Version 1.03 05/02

This operating manual is also available in German.

Please contact your local representative.

Diese Bedienungsanleitung ist auch in Deutsch erhältlich.

Bitte kontaktieren Sie Ihren nächstgelegenen FMS Vertreter.

Operating Manual EMGZ470A/472A

1Safety Instructions

1.1 Warnings

a) High danger of health injury or loss of life

Danger

This symbol refers to high risk for persons to get health injury or loss of life. This

warning has to be followed strictly.

b) Risk of damage of machines

Caution

This symbol refers to information, that, if ignored, could cause heavy mechanical

damage. This warning has to be followed absolutely.

c) Note for proper function

Note

This symbol refers to important information about proper use. If not followed,

malfunction can be the result.

1.2 List of Safety Instructions

The functionality of the Tension Measuring Amplifier is only guaranteed, if the

application and component recommendations are followed. In case of other

arrangement, heavy malfunction can be the result. Therefore, the installation

instructions on the following pages must strictly be followed.

Local installation regulations are to preserve safety of electric equipment. They are

not taken into consideration by this operating manual. However, they have to be

strictly followed.

Inadequate earth ground connection may cause electric shocks to persons,

malfunction of the total system or damage of the measuring amplifier! It is vital to

ensure a good earth ground connection.

Improper handling may damage the fragile electronic equipment! Don’t use rough

tools such as screwdrivers or pliers! Operators handling the processor board must

wear a well earthed bracelet in order to discharge static electricity.

Operating Manual EMGZ470A/472A

Table of Contents

1Safety Instructions ....................................................................................2

1.1 Warnings 2

1.2 List of Safety Instructions 2

2Definitions..................................................................................................4

3System Components..................................................................................4

4System Description....................................................................................5

4.1 Functional Description 5

4.2 Force Sensor 5

4.3 Electronic Unit EMGZ470A.W/472A.W 5

4.4 Block Diagram 6

5Quick Installation Guide..........................................................................7

6Dimensions.................................................................................................8

6.1 Dimensions of Offset Version (EMGZ470A.W) 8

6.2 Dimensions Double-Channel Version (EMGZ470/472A.W.D) 9

7Installation and Wiring ..........................................................................10

7.1 Mounting the Force Sensors 10

7.2 Mounting of the Measuring Amplifier 10

7.3 Wiring from Measuring Amplifier to Force Sensor 10

7.4 Wiring of Power Supply and PROFIBUS Data Cable 11

7.5 Wiring Diagram 12

7.6 Setting the PROFIBUS Address 13

8PROFIBUS Interface Description.........................................................14

8.1 GSD File 14

8.2 EMGZ470A.W/472A.W DP Slave Functional Description 14

8.3 Initial Parameters 14

8.4 Configuration 15

8.5 Process Data 16

9Calibrating the Measuring Amplifier ...................................................18

9.1 Simulating Method, Calibration within the PLC 18

9.2 Simulating Method, Calibration using Initial Parameters 19

9.3 Simulating Method, Calibration using Control Byte (Module 1 only) 19

9.4 Mathematical Method (Module 1 only) 20

9.5 Configuring the Lowpass Filter 21

10 Trouble Shooting.....................................................................................22

11 Technical Data EMGZ470A.W/472A.W...............................................23

Operating Manual EMGZ470A/472A

2Definitions

Offset: Correction value for compensation of the zero point difference. The offset

adjustment ensured that a force of 0N will generate a signal of 0V exactly.

Gain: Amplification factor for the measuring signal. Use of proper value will set the

measuring range of the sensor exactly corresponding to the signal output range.

Strain gauge: Electronic component that changes its resistance when it is extended.

Strain gauges are used in the FMS force sensors to gather the feedback value.

3System Components

The EMGZ470A.W/472A.W consists of the following components (refer also to fig.

1):

Force sensors

•For mechanical/electrical conversion of the tension force

•Force measuring bearing

•Force measuring roller

•Force measuring journal

•Force measuring bearing block

Electronic unit EMGZ470A.W/472A.W

•EMGZ470A.W: For supplying one force sensor and amplifying the mV signal

•EMGZ472A.W: For supplying two force sensors and amplifying the mV signal

•EMGZ470A.W.D.W/472A.D.W: For supplying one or two double range force

sensors and amplifying the mV signals

•With intergrated PROFIBUS interface for operation and parametrization

•Operates as PROFIBUS DP slave according to EN 50170

•For wall mounting, set off of force sensor (EMGZ470A.W.W)

PROFIBUS master computer

•For operation of the electronic unit EMGZ470A.W/472AW

•Operates as PROFIBUS DP master according to EN 50170

•Any master computer or PLC suitable

(Italic text indicates a variant or an option)

Operating Manual EMGZ470A/472A

4System Description

fig. 1: Basic structure EMGZ470A.W/472A.W Tension Measuring Amplifier E470001e

4.1 Functional Description

The force sensor measures the tension force in the material and transmits the value as

a mV signal to the electronic unit. The electronic unit amplifies the mV signal

depending on configuration. The resulting feedback value can be read by the

PROFIBUS master. The application dependent calculations will be done by the

PROFIBUS master.

4.2 Force Sensor

The force sensors use the flexion beam principle. The flexion is measured by strain

gauges and transmitted to the electronic unit as mV signal. Power supply exerts

influence to the strain gauges Wheatstone Bridge. The force sensors are therefore

supplied from the electronic unit with a very accurate power supply.

4.3 Electronic Unit EMGZ470A.W/472A.W

Common

The electronic unit contains a microprocessor to handle all calculations and

communications, the highly accurate sensor power supply and the signal amplifier for

the measuring value. In addition, a PROFIBUS interface is integrated to the electronic

unit.

The EMGZ470A.W.D /472A.W.D has the complete electronic unit twice to evaluate

two measuring ranges.

EMGZ470A.W for 1 force sensor

EMGZ472A.W for 2 force sensors (sum signal)

EMGZ470A.W.D for 1 double range force sensor

EMGZ472A.W.D for 2 double range force sensors

(1 sum signal per measuring range)

Operating Manual EMGZ470A/472A

Strain gauge amplifier

The strain gauge amplifier provides the highly accurate 4V power supply. A highly

accurate, fixed difference amplifier rises the mV signal up to 10V. This signal will be

fed to the A/D converter. The microprocessor then calculates a standardized signal

from the digitized measuring value, which is fed to the PROFIBUS interface.

PROFIBUS interface

The EMGZ470A.W/472A.W operates as PROFIBUS DP slave according to EN

50170. All settings and the entire communication is done by the integrated

PROFIBUS interface.

4.4 Block Diagram

fig. 2 E470002e

Operating Manual EMGZ470A/472A

5Quick Installation Guide

•Check all your requirements such as: Configuration of the PROFIBUS interface

(address number, data format, required PROFIBUS cycle time, termination) and

calibration mode (ref. to „9. Calibrating the measuring amplifier“) etc..

•Draw your final wiring diagram according to the FMS recomendations (refer to

„7.5 Wiring diagram)

•Install and wire all your components (refer to „7. Installation and wiring“)

•Make settings in the PROFIBUS master computer (DP master) (ref. to

„8. PROFIBUS Interface Description“)

•Put measuring amplifier into operation and calibrate it by PROFIBUS (refer to

„9. Calibrating the measuring amplifier“)

•Turn system on; proceed with a test run with low speed

•If required, activate additional application-specific functions of the PROFIBUS

master computer (DP master)

Note

If a real-time control loop is implemented with the PROFIBUS, you must ensure

that the application-specific PROFIBUS protocol is timewise short enough to

provide sufficient control dynamics.

Operating Manual EMGZ470A/472A

6Dimensions

6.1 Dimensions of Offset Version (EMGZ470A.W)

fig. 4: Outline drawing EMGZ470A.W / 472A.W E470004us

Operating Manual EMGZ470A/472A

6.2 Dimensions Double-Channel Version (EMGZ470/472A.W.D)

fig. 5: Outline drawing EMGZ470.D.W / 472.D.W E472001e

Operating Manual EMGZ470A/472A

7Installation and Wiring

Caution

The functionality of the Tension Measuring Amplifier is only guaranteed, if the

application and components recommendations are followed. In case of other

arrangements, heavy malfunction can be the result. Therefore, the installation

instructions on the following pages must strictly be followed.

Caution

Local installation regulations are to preserve safety of electric equipment. They are not

taken into consideration by this operating manual. However, they have to be strictly

followed.

7.1 Mounting the Force Sensors

Mounting of the force sensors is done referring to the FMS installation manual which

is delivered together with the force sensors.

7.2 Mounting of the Measuring Amplifier

The measuring amplifier is mounted directly to the force sensor using the FMS

standard plug (fig. 3). When using the offset version (EMGZ470A.W. /

EMGZ472A.W) the housing is mounted to the machine frame close to the force sensor

(fig. 4 and 5).

7.3 Wiring from Measuring Amplifier to Force Sensor

EMGZ470A.W / EMGZ472A.W

The cables are bared as shown in fig. 6 and then soldered to the terminals on the pc

board according to wiring diagram (fig. 8 and 9).

fig 6: Connecting the shield E470009e

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