FMS EMGZ470A.W User manual

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.
© by FMS Force Measuring Systems AG, CH-8154 Oberglatt – All rights reserved.

Operating Manual EMGZ470A/472A
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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.

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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

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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)

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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)

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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

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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.

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6Dimensions
6.1 Dimensions of Offset Version (EMGZ470A.W)
fig. 4: Outline drawing EMGZ470A.W / 472A.W E470004us

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6.2 Dimensions Double-Channel Version (EMGZ470/472A.W.D)
fig. 5: Outline drawing EMGZ470.D.W / 472.D.W E472001e

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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