FMS EMGZ321 Series User manual

Operating Manual EMGZ321
Digital microprocessor controlled
Double Channel Tension Measuring Amplifier
Version 2.19 10/2015 NS
Firmware Version V2.11 (from S/N 11263xx)
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 5
2System Description.................................................................................... 6
2.1 Functional Description 6
2.2 EMGZ321 Amplifier and its Subunits 7
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
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 22
7.3 Description of Amplifier Parameters 22
7.4 Outputs Parameter Group 23
7.5 Description of Output Parameters 23
7.6 Relay Parameter Group 25
7.7 Description of Relay Parameters 25
7.8 System Parameter Group 27
7.9 Description System Parameters 27
7.10 Reset to Default Parameters 30
7.11 Complete Parameter List 30
8Parameter Setting via a PC .................................................................... 34
8.1 Parameterisation in an Ethernet Network via Web Browser 35
8.2 Connecting the EMGZ321 Amplifier with a PC (Peer-to-Peer) 38

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9Mechanical Dimensions.......................................................................... 40
10 Trouble Shooting...................................................................................... 42
11 Technical Specification ........................................................................... 43
11.1 Technical Data 43
11.2 Input / Output Configuration 43

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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.

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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.
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

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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.
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.

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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)
2.3 EMG321 Sub Types
EMGZ321.R / .S / .W / .W.ACV
The tension amplifier 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 with and without supply unit
Detailed information about the mechanical dimensions refer to the outline drawings
Fig. 30 to 32.
EMGZ321.W.ACV
The tension amplifier 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
In order to improve the natural convection and keep the temperature of the
amplifiers that are mounted in a cabinet, to a minimum, a distance of at least
15mm (0.6”) between the devices must be kept.
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.