FMS EMGZ321 Series User manual

Operating Manual EMGZ321
Digital microprocessor controlled
Double Channel Tension Measuring Amplifier
Version 1.02 01/2010 ff
Firmware Version: 1.02
This operation manual is also available in German.
Please contact your local FMS 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.

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Table of Contents
1Safety Instructions .................................................................................... 4
1.1 Description Conditions 4
1.2 List of Safety Instructions 4
2System Description.................................................................................... 6
2.1 Functional Description 6
2.2 EMGZ321 Amplifier and its Subunits 6
2.3 EMG321 Sub Types 8
3Quick Installation Guide .......................................................................... 9
3.1 Preparations for Set-up 9
3.2 Installation Procedure 9
4Installation and Wiring .......................................................................... 10
4.1 Mounting the Force Measuring Roller 10
4.2 Mounting the EMGZ321 10
4.3 Wiring the Tension Monitoring System 11
4.4 Screw Terminal Arrangement 12
4.5 Connection of the Cable Shield 13
4.6 Digital Inputs 13
4.7 Relays Outputs 14
4.8 Opening the Housing 14
5Configuring the System .......................................................................... 15
5.1 Description of the Operating Panel 15
5.2 Preparations for System Configuration 16
The default setting for the language is English. 16
6Operation ................................................................................................. 18
6.1 Operating the EMGZ321 over the Front Panel 18
6.2 Display Value Selection State 19
6.3 Offset Compensation Procedure 19
6.4 Calibration Methods 20
6.5 Calibration Procedure: 20
7Parameter Setting over the Front Panel ............................................... 22
7.1 Basic Instructions for Parameter Setting 22
7.2 Amplifier Parameter Group 23
7.3 Description of Amplifier Parameters 24
7.4 Outputs Parameter Group 25
7.5 Description of Output Parameters 27
7.6 Relay Parameter Group 29
7.7 Description of Relay Parameters 31
7.8 System Parameter Group 33
7.9 Description System Parameters 36
7.10 Reset to Default Parameters 38
7.11 Complete Parameter List 39
8Parameter Setting via a PC .................................................................... 42
8.1 Parameterisation in an Ethernet Network via Web Browser 43

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8.2 Parameterization via a PC (peer-to-peer connection) 49
9Mechanical Dimensions .......................................................................... 52
10 Trouble Shooting..................................................................................... 54
11 Technical Specification ........................................................................... 55
11.1 Technical Data 55
11.2 Input / Output Configuration 55

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1Safety Instructions
All safety related regulations, local codes and instructions that appear in the manual or on
equipment must be observed to ensure personal safety and to prevent damage to the
equipment connected to it. If equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be impaired.
Do not stress the equipment over the specification limits neither during assembly nor
operation. To do so can be potentially harmful to persons or equipment in the event of a
fault to the equipment.
1.1 Description Conditions
a) Danger of health injury or loss of life
Danger
This symbol refers to high risk for persons to get health injury or loss life. It 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 an important information about proper use. If not followed,
malfunction can be the result.
1.2 List of Safety Instructions
Some of the wire terminals in the power supply board of the EMGZ321W.ACV are
under a tension of 85-264 VAC. Mortal danger! Only specially instructed and qualified
personnel should handle this amplifier unit. In any case the power supply must be
disconnected from the main supply before opening the housing.
Proper function of the FMS tension controllers is only guaranteed with the
recommended application of the components. In case of other arrangement, heavy
malfunction can be the result. Installation instructions on the following pages must be
followed strictly.

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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 followed
strictly.
Bad earth connection may cause electric shock to persons, malfunction of the total
system or damage of the control unit. It is vital to ensure a proper earth ground
connection.
The processor board is mounted directly behind the operation panel. Improper handling
of the electronic boards may cause damage to the fragile equipment. Don’t use rough
tools such as screwdrivers or pliers! Operators handling the electronic boards must wear
a well earthed bracelet in order to discharge static electricity.

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2System Description
2.1 Functional Description
The EMGZ321 is a double channel strain gauge amplifier for a single measuring point.
The material tension can be measured on both sides of the measuring roller
independently.
The 2 force sensors of the measuring point measure the tension force in the material and
transmit the measuring value as a mV signal to the electronic unit EMGZ321. The
electronic unit amplifies the mV signal of each force sensor independently. This signal
will be fed to the A/D converter. The microprocessor does then all application specific
calculations such as offset, gain, low-pass filter, limit switches, etc.
A sum value (A+B) and a difference value (׀A-B׀) are calculated from the force values of
the sensors A and B. The resulting feedback values are shown in the display in [N] or the
chosen unit. In addition, the feedback values are provided at the analogue outputs and can
be evaluated by analogue instruments, a PLC or equivalent devices.
Fig. 1: Application example of EMGZ321 E321004e
2.2 EMGZ321 Amplifier and its Subunits
As a plug & play unit all functions of the EMGZ321 can be configured very easily via a
user-friendly control panel and two lines LCD. Tension reference values and all other
parameters and functions can be set with keys or remotely via a web browser. The
amplifier is then either connected to a network or via a peer-to-peer configuration to a
laptop or local PC. All parameters are stored in a none-volatile EEPROM memory.
Automatic offset compensation and calibration, digital signal filtering, function along
with a lot of other features creates a very powerful tension monitoring system. The
fundamental characteristics of the EMGZ321 remain its operation simplicity and
reliability even under challenging operating conditions.

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Fig. 2: Block diagram EMGZ321 E321002e
Display and Operation Panel
A dual-line LCD display with 8 characters each line and a well arranged control panel
make the EMGZ321 very easy to set-up and operate. All parameters and functions are
accessible trough the wind rose key pad and three buttons.
Strain gauge amplifier
The build-in strain gauge amplifier delivers a highly accurate supply voltage (5VDC,) for
2 force sensors. The force sensors can be wired using a 4- wire circuitry.
A highly accurate differential amplifier rises the mV sensor signal up to 10V.
Force Sensors
The force sensors are based on the flexion beam principle. The flexion is measured by
strain gauges and transmitted to the electronic unit as mV signal. Due to the wheatstone
bridge configuration of the strain gauges, the measured value is proportional to the power
supply. EMGZ4321 provides a very accurate power supply for the wheatstone bridge.
Interface
The EMGZ321 can be embedded in an Ethernet network and the communication is via a
web browser (Ethernet explorer 7 or higher).

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2.3 EMG321 Sub Types
EMGZ321.R / .S / .W / .W.ACV
The tension controller EMGZ321 series is available in three different housing options.
EMGZ321.R: Rail mount housing
EMGZ321.S: Panel mount housing
EMGZ321.W / W.ACV Wall mount housing
Detailed information about the mechnical dimensions refer to the outline drawings Fig.
30 to 32.
EMGZ321.W.ACV
The tension controller type EMGZ321.W.ACV includes a separate power supply that
supports voltage of 85V up to 264V. It transforms the AC input voltage into DC 24V for
the internal system components.

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3Quick Installation Guide
In a Plug & Play configuration the set-up of the EMGZ321 and force sensors is straight
forward and limited to only the offset compensation and the calibration procedure.
3.1 Preparations for Set-up
1. Read the Operation Manual of your force measuring sensors and amplifier
2. Check your requirements such as:
– Desired output configuration 0…10V, ±10V or 0/4… 20mA
– Display unit of nominal force
3. Draw the wiring diagram for your configuration (ref. to “3.5 Wiring the Amplifier“)
4. If required, determine special parameters (ref. to “5.2 Parameterization for System
Configuration”)
3.2 Installation Procedure
1. Mount your force maesuring roller to the machine frame.
2. Wire the force measuring sensors (ref. to “4.3 Wiring the Tension Monitoring
System”)
3. Connect the amplifier to the power supply.
4. The power supply voltage must be in the range 18 to 36V DC.
5. Perform offset compensation and calibration (ref. to paragraphs 4.1 to 4.4)
6. If required, do additional settings (ref. to “5.2 Parameterization for System
Configuration”)

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4Installation and Wiring
Caution
Proper function of the FMS tension amplifier is only guaranteed with the recommended
application of the components. Other arrangements, can cause heavy malfunctions.
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 followed
strictly.
4.1 Mounting the Force Measuring Roller
Mounting of the force sensors is done according to the FMS installation manual which is
delivered together with the force sensors.
4.2 Mounting the EMGZ321
The EMGZ321 series is available in 3 different housing options. The respective
mechanical dimensions of the different housings can be seen in paragraph 15.