The data in this document may not be altered or amended without special notification from ETAS GmbH. ETAS GmbH undertakes no further obligation in
relation to this document. The software described in it can only be used if the
customer is in possession of a general license agreement or single license.
Using and copying is only allowed in concurrence with the specifications
stipulated in the contract.
Under no circumstances may any part of this document be copied, reproduced,
transmitted, stored in a retrieval system or translated into another language
without the express written permission of ETAS GmbH.
This chapter contains information about the following topics:
•“Identification of Safety Notices” on page 7
•“Presentation of Information” on page 8
•“Scope of Supply” on page 8
•“Additional Information” on page 8
1.1Identification of Safety Notices
The safety notices contained in this manual are identified with the danger symbol shown below:
The safety notices shown below are used for this purpose. They provide notes
to extremely important information. Please read this information carefully.
DANGER
indicates an immediate danger with a high risk of death or serious injury, if
not avoided.
WARNING
indicates a possible danger with moderate risk of death or (serious) injury, if
not avoided.
CAUTION
identifies a hazard with low risk that could result in minor or medium physical
injuries or property damages if not avoided.
ES420.1 - User’s Guide7
ETASAbout this Manual
1.2Presentation of Information
All activities to be performed by the user are presented in a "Use Case" format.
That is, the goal to be accomplished is briefly defined in the heading, and the
respective steps required for reaching this goal are then presented in a list. The
presentation looks as follows:
Goal definition:
any advance information...
1. Step 1
Any explanation for step 1...
2. Step 2
Any explanation for step 2...
3. Step 3
Any explanation for step 3...
Any concluding comments...
Typographical conventions
The following typographical conventions are used:
BoldLabels of the device
ItalicParticularly important text passages
Important notes for the user are presented as follows:
TIP
Important note for the user.
1.3Scope of Supply
Prior to the initial commissioning of the module, please check whether the
module was delivered with all required components and cables (see chapter
9.1 on page 93).
Additional cables and adapters can be obtained separately from ETAS. A list of
available accessories and their order designation is located in chapter “Accessories” on page 93 of this manual or in the ETAS product catalog.
1.4Additional Information
The configuration instructions for the module under INCA can be found in the
corresponding software documentation.
ES420.1 - User’s Guide8
ETASBasic Safety Notices
2Basic Safety Notices
This chapter contains information about the following topics:
•“General Safety Information” on page 9
•“Requirements for Users and Duties for Operators” on page 9
•“Intended Use” on page 9
2.1General Safety Information
Please observe the Product Safety Notices ("ETAS Safety Notice") and the following safety notices to avoid health issues or damage to the device.
TIP
Carefully read the documentation (Product Safety Advice and this User's
Guide) that belongs to the product prior to the startup.
ETAS GmbH does not assume any liability for damages resulting from
improper handling, unintended use or non-observance of the safety precautions.
2.2Requirements for Users and Duties for Operators
The product may be assembled, operated and maintained only if you have the
necessary qualification and experience for this product. Incorrect operation or
operation by users without sufficient qualification may lead to injuries or death
or property damages.
The safety of systems that are using the product is the responsibility of the
system integrator.
General safety at work
The existing regulations for safety at work and accident prevention must be
followed. All applicable regulations and statutes regarding operation must be
strictly followed when using this product.
2.3Intended Use
Application area of the product
This product was developed and approved for applications in the automotive
area. The module is suitable for use in interiors, in the passenger cell, in the
trunk, in the engine compartment or in the exterior area of vehicles.
For use in other application areas, please contact your ETAS contact partner.
ES420.1 - User’s Guide9
ETASBasic Safety Notices
Requirements for the technical state of the product
The product is designed in accordance with state-of-the-art technology and
recognized safety rules. The product may be operated only in a technically flawless condition and according to the intended purpose and with regard to safety
and dangers as stated in the respective product documentation. If the product
is not used according to its intended purpose, the protection of the product
may be impaired.
Requirements for operation
•Use the product only according to the specifications in the correspond-
ing User's Guide. With any deviating operation, the product safety is no
longer ensured.
•Observe the requirements on the ambient conditions.
•Do not use the product in potentially explosive atmospheres.
Electrical safety and power supply
•Observe the regulations applicable at the operating location concerning
electrical safety as well as the laws and regulations concerning work
safety!
•Connect only current circuits with safety extra-low voltage in accordance
with EN 61140 (degree of protection III) to the connections of the module.
•Ensure the compliance with the connection and adjustment values (see
the information in the chapter "Technical Data").
•Do not apply any voltages to the connections of the module that do not
correspond to the specifications of the respective connection.
Power supply
•The power supply for the product must be safely disconnected from the
supply voltage. For example, use a car battery or a suitable lab power
supply.
•Use exclusively lab power supplies with double protection to the supply
system (with double insulation / with reinforced insulation (DI/ RI)).
•The lab power supply must be approved for an operating altitude of
5,000 m and for an ambient temperature of up to 120 °C.
•For normal operation of the modules as well as for very long standby
operation, it is possible that the vehicle battery will be drained.
Connection to the power supply
•The power cable may not be connected directly to the vehicle battery or
the lab power supply, but only via a suitable fuse.
•Ensure that the connections of the lab power supply, the power supply at
the module and the vehicle battery are easily accessible!
ES420.1 - User’s Guide10
ETASBasic Safety Notices
•Route the power cable in such a way that it is protected against abrasion,
damages, deformation and kinking. Do not place any objects on the
power cable!
DANGER
Dangerous electrical voltage!
Connect the power cable only with a suitable vehicle battery or with a suitable
lab power supply! The connection to power outlets is not allowed!
To prevent an inadvertent insertion in power outlets, ETAS recommends to
equip the power cables with safety banana plugs in areas with power outlets.
De-energizing the module
The module does not have an operating voltage switch. The module can be deenergized as follows:
•Disconnecting the cables from the measurement inputs
and
•Disconnecting the module from the power supply
– Switching off the lab power supply
or
– Disconnecting the module from the lab power supply
Separating device is the lab plug of the power cable or the plug of the
power cable at the connection of the module
or
– Disconnecting the module from the vehicle battery
Separating device is the lab plug of the power cable or the plug of the
power cable at the connection of the module
or
– Disconnecting the vehicle battery.
Cabling
Approved cables:
•Use exclusively ETAS cables at the connections of the module!
•Adhere to the maximum permissible cable lengths!
•Do not use any damaged cables! Cables may be repaired only by ETAS!
CAUTION
Never apply force to insert a plug into a socket.
Ensure that there is no contamination in and on the connection, that the plug
fits the socket, and that you correctly aligned the plugs with the connection.
CAUTION
Damage possible to connectors of the modules or the ES4xx_BRIDGE!
Fasten the two modules with screws to the stop inside the module without
canting them.
ES420.1 - User’s Guide11
ETASBasic Safety Notices
For detailed information about cabling, see the User's Guide of the module.
CAUTION
Potential equalization in the vehicle is possible via the shield of the
connecting cables of the modules!
Install the modules only at locations with the same electrical potential or isolate the modules from the installation location.
Requirements for the place of installation
•Place the module or the module block on a smooth, even and firm foundation.
•The module or module block must always be securely fastened.
Requirements on the ventilation
•Keep the module away from heat sources and protect it against direct
exposure to the sun.
•The free space above and behind the module must be selected so that
sufficient air circulation is ensured.
Fixing the module on a carrier system
When selecting the carrier system, observe the static and dynamic forces that
could be created by the module or the module block at the carrier system.
CAUTION
Damage or destruction of the module is possible.
The modules of series ES400 are approved only for installation and operation
at components or locations that ensure compliance with the technical data of
the modules, such as:
• the resistance to vibration of the modules (for example, install modules
only on spring-loaded bodies, not on wheel suspensions or directly at the
motor) and
• the temperature resistance of the modules (for example, do not install
modules on the motor, turbocharger, exhaust manifold or their environments).
CAUTION
During the installation of the modules, observe the permissible temperature
range of the cable ties being used!
ES420.1 - User’s Guide12
ETASBasic Safety Notices
Damage of the module and loss of properties acc. to IP67
CAUTION
Loss of Features as defined by IP67!
Water standing at the pressure balance element damages the membrane!
Please observe which way the module is pointing when installing vertically!
Transport
•Mount and connect the modules only at the location of their startup!
•Do not transport the modules at the cable of the module or any other
cables.
Maintenance
The product is maintenance-free.
Repair
If a repair of an ETAS hardware product should become necessary, send the
product to ETAS.
Cleaning the module housing
•Use a dry or lightly moistened, soft, lint-free cloth for cleaning the module
housing.
•Do not user any sprays, solvents or abrasive cleaners which could damage the housing.
•Ensure that no moisture enters the housing. Never spray cleaning agents
directly onto the module.
ES420.1 - User’s Guide13
ETASES400 Product Family
Sensor 1
Sensor 2
Sensor 3
Sensor n
Sensor 1
Sensor 2
Sensor 3
Sensor n
Sensor 1
Sensor 2
Sensor 3
Sensor n
Sensor 1
Sensor 2
Sensor 3
Sensor n
Sensor 1
Sensor 2
Sensor 3
Sensor n
3ES400 Product Family
This chapter contains information on the following topics:
•“Wiring Concepts in Test Vehicles” on page 14
•“Features of the ES400 Line” on page 15
•“Housing” on page 16
•“Ports” on page 17
•“LED” on page 18
3.1Wiring Concepts in Test Vehicles
For the test phase, several hundred sensors must be installed in a test vehicle
in various areas, e.g. in the engine compartment and in the floor area. The sensors, which are positioned all over the vehicle, then have to be connected to the
measuring instruments of the test setup.
Today’s standard solutions with their central setup of measuring instruments
inside the vehicle require complex cabling to connect the widely distributed
sensors with the measuring instruments. Numerous, usually long connection
cables between the sensors and the measuring instruments, bundled together
to form several fat wiring harnesses, require a highly modified splash wall of
the test vehicle. This involves long setting-up times as well as high costs.
Fig. 3-1Central and Decentral Sensor Cabling
With the ES400 modules, ETAS provides a decentral solution which consider-
ably simplifies the test setup of the sensors.
The basic idea of this concept is to install the modules of the ES400 family as
close as possible to the sensors, to concatenate the modules with each other
and to connect just the first module of this chain with the laptop in the vehicle.
ES420.1 - User’s Guide14
ETASES400 Product Family
3.2Features of the ES400 Line
3.2.1Advantages of the Decentral Wiring Concept
•The compact ES400 modules can be mounted close to the sensors with
short connection cables.
•The simple assembly and wiring principle (daisy chain topology) of the
modules
– requires only one common cable between the modules for power
supply and data transfer
– considerably reduces the setting-up times for tests
– simplifies the maintenance and the extension of the test setup
•The only item in the vehicle is the laptop which is connected to the mod-
ules with just one cable.
•Test vehicles equipped with an ES400 measurement system can be
used flexibly because the vehicles do not have to be modified for
changed or new test tasks.
3.2.2Further Features
This list provides an overview of the other features of the ES400 line in addition
to decentral cabling:
•The ES400 modules have a very compact design.
•Each module has an LED for localizing the module.
•The Thermo Modules of the ES400 family use a XCP-based protocol
which is compatible to the existing ETAS Ethernet topology.
The concept fulfills the following requirements:
– high bandwidth to be able to realize lots of channels with high resolu-
tions (typical in measuring and calibration applications) with fast
sampling rates
– simple application based on the Ethernet integration in INCA, no com-
plicated setting of bus parameters,
– simple to integrate in measurement and calibration tools manufac-
tured by third-party suppliers due to the use of XCP as application
protocol
– support of all probes and pressure sensors used in the automotive
industry
•Innovative, battery-saving power supply management
– automatic power-saving feature (“Standby”)
– “Wake Up” via the Ethernet interface
•Modules suitable for use in automotive applications; suitable for use in
the development environment and in the vehicle on test drives:
– Housing, connectors and cables waterproof and dustproof in acc.
with IP65 or IP67; designed for use in the engine compartment or the
outside area of the vehicle
– rugged to acceleration or mechanical damage
– rugged to extreme environmental conditions (temperature, damp-
ness, EMC)
– very low temperature coefficients contribute to the reduction in the
number of measurement errors
For the complete technical data of the ES420.1, refer to the chapter “Technical
Data” on page 65.
3.3Housing
A sturdy metal housing is used for the ES420.1; it has ports on the front of the
device so it can fit into tight spaces. The ES420.1 is specifically designed to be
installed in engine compartment, but also in the passenger cell.
The housings of the ES400 family can quickly and easily be connected to one
another to create a measurement system (see section 5.2 on page 33). The
modules can easily be screwed directly to a carrier system or attached to it
using cable fasteners both in the vehicle and in the lab.
These simple and uncomplicated ways of attaching the modules make them
flexible in terms of assembly. These methods of attachment can also be used
in harsh environmental conditions (salt fog, dirt).
CAUTION
Loss of Features as defined by IP67!
Do not open or change the module housing!
Works on the module housing may be executed only by qualified technical
personnel.
ES420.1 - User’s Guide16
ETASES400 Product Family
IN
OUT
Sensor
3.4Ports
All ports of the ES400 measuring modules are on the front of the device (see
Fig. 3-2 on page 17).
The LEMO and Souriau connectors used adhere to protection class IP67. All
ports are reverse-polarity protected due to the exclusive use of coded LEMO or
Souriau connectors.
Fig. 3-2Front
3.4.1“Sensor” Port
The front of the ES420.1 features a 22-pin Souriau port to which four sensors
can be connected using a adapter cable. An individual sensor power supply
port is available for each sensor.
The use of a “cable tail” or “whip” solution with just one connector makes it
possible to change the modules quickly within complex test setups.
3.4.2Daisy Chain Ports (“IN”, “OUT”)
The modules are connected using a daisy chain topology. This means each
module has an explicit input socket and an explicit output socket. The Ethernet
data line and the supply voltage are routed through the daisy chain ports of the
module:
•“IN” (input)
•“OUT” (output)
The PC, the modules ES523, ES59x, ES600.2, ES891, ES910.3 or the Drive
Recorder ES720 are connected at the “IN” port (input). The “OUT” port (output)
is connected to the following module of the ES400 line or remains free on the
last module of the chain.
ES420.1 - User’s Guide17
ETASES400 Product Family
3.5LED
Every module has an LED. It indicates the following states of the module:
3.5.1Operational State
DisplayState
offNo power supply to the mod-
ule
yellow flashing
0,25 s on / 0,25 s reduced
green illuminated
semi bright
yellow illuminated
semi bright
green flashing
0,1 s on / 1,9 s off
Initialization of the module
not yet complete Further modules in a chain
not initialized yet
Normal
At least one sensor supply
voltage is activated.
Standby
No Ethernet connection
established
3.5.2Service State
Display State
red flashing
0,25 s on / 0,25 s reduced
red flashing
0,1 s on / 0,6 s off
Module identification
Update of the firmware /
HDC
3.5.3Functional State
DisplayState
yellow-red flashing
0,5 s yellow reduced /
0,5 s red reduced
red illuminated
fully bright
red illuminated
semi bright
ES420.1 - User’s Guide18
Warning
Overload on a sensor supply
voltage channel
Error during self-test
Internal error
ETASHardware Description
4Hardware Description
This chapter contains information on the following topics:
•“Features of the ES420.1” on page 19
•“Block Diagram” on page 20
•“Sensor Channels” on page 20
•“Measurement Accuracy” on page 21
•“Data Transfer” on page 23
•“Power Supply” on page 28
•“Configuration” on page 31
•“Tool Integration” on page 31
•“Firmware Update” on page 31
•“Calibration” on page 31
4.1Features of the ES420.1
Fig. 4-1ES420.1 Housing
The ES420.1 Thermo Module is a member of the family of ES400 Modules. The
ES420.1 can acquire temperatures at eight input channels.
Overview of the major features of the ES420.1:
•8 galvanically isolated measurement channels for thermocouples
•Measuring range from -210 °C to +1,820 °C (depending on type of thermocouple)
•Measurement channels galvanically isolated from each other and from
the supply voltage
•Settable acquisition rate per channel
•Parameterized software filters for signal smoothing with adaptive cutoff
frequency
•High resolution
For the complete technical data of the ES420.1, refer to the chapter “Technical
Data” on page 65.
ES420.1 - User’s Guide19
ETASHardware Description
FPGA
OpenTC
Detection
Channel 8
Channel ...
Channel 1
ES42 0
Ethernet
Phy
Ethernet
Traf f ic
Detect ion
100
MBit/s
Ethernet
Connector
(Host
direction )
Synchronous Sampling
.
.
.
Measurement Controller
24-Bit A/D
Converter
24-Bi t A/ D
Converter
Splitt er
Cab l e
Connector
Splitt er cable
CBATx4xx
TEDS
Open TC
Detect ion
Diagnosti c
Unit
TEDS
Interf ace
Tim e
Synchronizatio n
Unit
Eth e r n et
Phy
100
MBit/s
Eth e r n et
Connector
On
Automatic
On-board
temp erature
Prot ocol Engine
Fr am e
Gen er at or
Co ld Junction
Voltage
Regulator
5...50V
4.2Block Diagram
Fig. 4-2Block Diagram
The ES420.1 is a module with eight identical sensor channels with common
Cold Junction Compensation, two shared Ethernet interfaces and a power supply.
4.3Sensor Channels
All sensor channels of the ES420.1 are identical. The thermocouple cold junction channels have a resolution of 24 bits. You can use thermocouple cold junctions of types B, E, J, K, N, R, S and T. The maximum measurement range,
distributed over all thermocouple cold junction types, is -210 °C to +1820 °C.
To operate different thermocouple cold junctions on the ES420.1, you can
order special splitter cables from ETAS for the relevant thermocouple cold
junction types (see the section 9.2.1 on page 93).
The special splitter cables for the individual thermocouple cold junction types
are made of the same material combination as the thermocouple cold junctions. To ensure a high level of accuracy over the entire temperature range,
thermo lines of the relevant type are used with the splitter cables (e.g. NiCr and
Ni with the splitter cable CBATK).
The material transition from the thermo line to the gold-plated contacts of the
master plug is the cold point. The cold point is measured together for all channels with a PT100 embedded in a solid copper core. The copper core ensures a
very even distribution of the cold point temperature of all channels. The cold
point is protected against fast or erratic temperature changes of the environment with a thermally highly isolating design. The design of the master plug
guarantees that the measure result is only influenced by a few tenths of a Kel-
ES420.1 - User’s Guide20
vin even with fast temperature changes or uneven temperature distribution
(e.g. if installed near the exhaust system or air vents).
The thermocouple channels are galvanically isolated from one another, from
the supply voltage and from the device ground. This makes it possible to use
non-isolated thermocouple cold junctions in non-potential-free systems without any negative effect on the accuracy.
ETASHardware Description
The combination of thermocouple cold junction, replaceable splitter cable and
ES420.1 enables temperatures to be measured highly precisely and virtually
independently of environmental influences.
4.4Measurement Accuracy
While measuring temperatures with thermocouples the total measurement
inaccuracy is determined by different parts. These parts are:
•Basic accuracy T
•Temperature drift of thermocouple inputs T
g
d
•Inaccuracy depending on the internal resistance of the thermocouple T
•Inaccuracy of cold junction compensation T
•Temperature drift of cold junction compensation T
cjc
dcjc
The maximum total inaccuracy is the sum of all parts.
T
T =
+ Td + Ti + T
g
cjc
+ T
dcjc
The amount of the parts depends on the type of thermocouple. The figures are
listed in table “Sensor Inputs” on page 72.
Two examples show you how to calculate the maximum total inaccuracy.
Example 1
A thermocouple of type K with an internal resistance Ri of less than 50 is
used to measure a temperature Tm of 200 °C (473.15 K; 392 °F) at an ambient
temperature T
= ( | Tm - T0 | * 0.025 %) + 0.25 K
T
g
Tg = ( | 473.15 K - 298.15 K | * 0.025 %) + 0.25 K
= 0.29 K
T
g
Td = 0.005 K/K * | Ta - T0 |
= 0.005 K/K * | 25 °C - 25 °C |
T
d
= 0.00 K
T
d
= 0 because the internal resistance is less than 50
T
i
T
= 1 K
cjc
= 0.008 K/K * | Ta - T0 |
T
dcjc
T
= 0.008 K/K * | 25 °C - 25 °C |
dcjc
= 0.00 K
T
dcjc
The maximum total inaccuracy is:
of 25 °C (77 °F).
a
i
T
T =
+ Td + Ti + T
g
cjc
+ T
dcjc
T = 0.29 K + 0.00 K + 0.00 K + 1 K + 0.00 K
T = 1.29 K
In this example the maximum total inaccuracy is determined by the inaccuracy
of the cold junction compensation.
ES420.1 - User’s Guide21
ETASHardware Description
Example 2
A thermocouple of type K with an internal resistance Ri of 150 is used to
measure a temperature T
ture Ta of 50 °C (122 °F).
= ( | Tm - T0 | * 0.025 %) + 0.25 K
T
g
Tg = ( | 673.15 K - 298.15 K | * 0.025 %) + 0.25 K
= 0.34 K
T
g
= 0.005 K/K * | Ta - T0 |
T
d
Td = 0.005 K/K * | 50 °C - 25 °C |
= 0.13 K
T
d
Ti = 0.004 K/ * Ri
= 0.004 K/ * 150
T
i
= 0.60 K
T
i
T
= 1 K
cjc
= 0.008 K/K * | Ta - T0 |
T
dcjc
T
= 0.008 K/K * | 50 °C - 25 °C |
dcjc
= 0.20 K
T
dcjc
The maximum total inaccuracy is:
of 400 °C (673.15 K; 752 °F) at an ambient tempera-
m
T
T =
+ Td + Ti + T
g
cjc
+ T
dcjc
T = 0.34 K + 0.13 K + 0.60 K + 1 K + 0.20 K
T = 2.27 K
In this example the maximum total inaccuracy is determined by the inaccuracy
of the cold junction compensation and the part of the inaccuracy that depends
on the internal resistance of the thermocouple.
ES420.1 - User’s Guide22
ETAS
SA
48
UDP Header
IFG
min. 96
IP Header
DA
48
Pr e56So F
8
CRC
32
Typ e
16
DATA
n*8
X CP M e ssag e 1X CP M e ssa g e n
...
XCP on Ethernet Message
XCP HeaderXCP Package
DATATIM E STA MPDAQFIL LPIDCTRLEN
Embedd ed UDP/IP
Embedded XCP
IEEE80 2.3 (Et hernet)
4.5Data Transfer
For data transfer, the ES930.1 as well as the ES4xx and ES63x modules use a
100 Mbit/s Ethernet network connection in duplex operation. The data transfer
can be adapted flexibly to suit the test setup and the measurement task.
TIP
The complete Ethernet bandwidth is available for both measure data and
control variables.
Calibration procedures can take place in a Rapid Prototyping application without delay with measure data being acquired at the same time.
4.5.1Communication Protocols
The universal ASAM measure and calibration protocol XCP is used for serial
communication. On the Ethernet transport and network layer, the UDP/IP protocol is used (see Fig. 4-3 on page 23).
Within the XCP protocol, the modules transfer, among other things, module ID,
time stamp and measure and/or stimulation data in an extremely precise and
predictable time pattern. The communication protocol used for the modules
avoids repeated transfer of protocol data, which takes place, for example, in
handshake-based systems. This makes a high bandwidth available for reference data.
Fig. 4-3Message Format “XCP on UDP” (Schematic)
Using the UDP/IP standard for data transfer makes it possible to connect the
modules directly to a PC, a router or a switch. In XCP communication, the PC
has the master function.
ES420.1 - User’s Guide23
ETAS
No real-time requirements are made. Data acquisition on a PC, which generally
does not have to fulfil high real-time requirements, can thus be connected
directly to an ES400 chain. With a real-time-capable master, such as, for example, a Rapid Prototyping system, lots of different kinds of I/O signal can be
accessed with extremely short cycle times.
TIP
The communication protocol used by the ES400 family makes it possible for
third-party suppliers to use the communication protocol for their own, nonETAS applications once the modules have been configured with the „ES4xx
Configuration Tool from ES4xx_DRV_SW“ .
4.5.2Realization
4.5.2.1Time Slice Procedure
The modules in the daisy chain transfer the data to the master using a
100 MBit/s Ethernet connection time-controlled, i.e. without being prompted.
The PC assumes the function of the master. In the network, the modules
respond like a single Ethernet device with one MAC address.
All daisy chained modules have a generator which is only activated in the last
module of each chain after the test setup has been connected to the PC. The
frequency of the generator or the period duration of the time slices generated
can be set in the application program. It corresponds to the measuring frequency of the measurement channel with the highest acquisition rate in the
chain.
A binary counter linked to the generator periodically counts the time slices generated (value range: 2
vant number of time slices in the IP header. The Ethernet frames are
transferred from module to module within the chain.
Each module in the chain receives bandwidth to transfer its measure data in
freely selectable time slices assigned within the period of the binary counter.
The module uses the number of the time slice to determine whether it can
insert an XCP message with its measure data into the current time slice.
The fastest module, which determines the period duration of the time slices
generated, transfers data in every time slice. An Ethernet frame then contains
at least one XCP-on-Ethernet data package. The length of the Ethernet frame
transferred inside a time slice increases with the number of modules which can
insert their data into this time slice.
The numbering of the time slices ensures, for example, that two modules which
work with half the sampling rate of the generator never attach their data to the
same Ethernet frame. One module uses only the odd frame numbers and the
other only the even ones. This mechanism also ensures for certain that the
assigned frames do not exceed the length of a time slice.
16
= 65536). The last module in the chain sends the rele-
The measure data is automatically distributed to the frames so that the available bandwidth is used perfectly.
ES420.1 - User’s Guide24
ETAS
The time slice procedure makes both measurements of fast signals and the
acquisition of a large number of channels with a low sampling rate possible.
If a few fast signals and lots of slow ones are acquired in a chain, the slow
signals can be transferred in time multiplex procedure.
TIP
Due to data transfer by Ethernet, there are virtually no limitations in terms of
the number of modules in a module chain even with fast sampling rates.
4.5.2.2Clock Generator for Synchronizing Modules
The clock generator for the synchronization of the modules is either the first
module in an module chain or the network module ES600. In both cases, the
measure data is synchronized with a tolerance of one microsecond. Using an
ES600 network module, several ES4xx/ES63x/ES93x chains can be synchronized with each other or with the modules of the ES600 series. The ES4xx/
ES63x/ES93x and ES600 modules add the relevant time stamp to the Ethernet
data package for every measure value. The exact assignment in terms of time
of the measure data of the ES4xx/ES63x/ES93x and ES600 modules used
resulting from this makes precise analysis of the correlations of measure signals possible.
4.5.2.3Synchronizing the Modules and INCA Signal Processing
Data transfer does not require synchronization of the local timebases of the
ES4xx/ES63x/ES93x modules. The time stamps are still synchronized by the
system to be able to correlate measure data and sampling times of different
modules in terms of time after data transfer. A precise time and drift synchronization takes place in the modules via a hardware connection.
No bandwidth is required for this, unlike time synchronization in acc. with
IEEE1588 (Precision Time Protocol). The modules add the time stamp to the
Ethernet data package for every measure date.
The combination of time stamp synchronization, full duplex and time slice procedure results in a very high reference data rate of the modules.
ES420.1 - User’s Guide25
ES420.1 - User’s Guide26
Stellgrößen
Messdaten
M1
Rate: 10 kHz
Ei nkoppler
Auskoppler
Fr am e
Generator
(in akti v)
MODUL 1
St ellgrößen
Messdaten
M2
Rate: 10 kH z
Ein koppler
Auskoppler
Fr am e
Gen era to r
(in akti v)
MODUL 2
St e l l g r ö ß e n
Messdaten
M3
Rate: 10 kHz
Einkoppler
Auskoppler
Fr am e
Gene rat or
(10 kHz)
MODUL 3
Et h e r n e t
100 M bi t/ s
PC
Ethernet-Frame 1
M3 M2 M1HRM3 M2 M1HRM3 M2 M1HR
t [µs]
2000100
Ethernet -Frame 2Ethernet -Fr ame 65536
Perio dendauer Frame-Generator
M3 M2 M1HR
Ethernet -Fram e 3
M3 M2 M1HR
Ethernet -Fr ame 4
M3 M2 M1HR
Ethernet-Frame 5
300
500
400
H UDP/IP Header
R
Reserviert für zusät zliche
Kommunikation
Mn Messdaten von Modul n
ETAS
4.5.3Examples
4.5.3.1Example 1
Fig. 4-4 on page 26 shows an example of an application with three concatenated ES400 modules with the same acquisition rates. The transfer
scheme for this configuration is shown in Fig. 4-5 on page 26.
Fig. 4-4Time-Multiplex Data Transfer Between an ES400 Module Chain and a PC
Fig. 4-5Transfer Scheme for Example 1 (Simplified, Not True to Scale)
In this example, the third module periodically generates 2
16
(65536) time slices each 100 microseconds long. Modules 1, 2 and 3 acquire measure-
ments with the same rate of 10 kHz each. Module 1, Module 2 and Module 3 link their measurements to each time slice (see Fig. 4-5 on page 26).
Independently of this, control variables can be transferred at the same time from the PC to the modules.
ES420.1 - User’s Guide27
Stellgrößen
Messdaten
M1
Rate: 10 kHz
Ei nkoppler
Auskoppler
Fr am e
Generator
(in akti v)
MODUL 1
Et h e r n e t
100 M bi t/ s
PC
St ellgrößen
Messdaten
M2
Rate: 2 kHz
Ein koppler
Auskoppler
Fr am e
Gen era to r
(in akti v)
MODUL 2
St e l l g r ö ß e n
Messdaten
M3
Rat e: 5 kHz
Einkoppler
Auskoppler
Fr am e
Gene rat or
(10 kHz)
MODUL 3
Ethernet-Frame 1
M1HRM1HRM3 M2 M1HR
t [µs]
2000100
Frame 2Fr. 65536
Perio dendauer Frame-Generator
M3 M1HR
Frame 3
M1HR
Frame 4
M3 M2 M1HR
Ethernet-Frame 5
300
500
400
H UDP/IP Header
R
Reserviert für zusät zliche
Kommunikation
Mn Messdaten von Modul n
ETAS
4.5.3.2Example 2
Fig. 4-6 on page 27 shows an example in which three modules with different acquisition rates are linked to each other. The transfer scheme for
this configuration is shown in Fig. 4-7 on page 27.
Fig. 4-6Time-Multiplex Data Transfer Between an ES400 Module Chain and a PC
Fig. 4-7Transfer Scheme for Example 2 (Simplified, Not True to Scale)
16
In this example, the third module periodically generates 2
ules 1, 2 and 3 acquire measurements at a rate of 10 kHz, 2 kHz and 5 kHz. Module 1 links its measurements to each Ethernet frame, module 2 to
every fifth Ethernet frame and module 3 to every second Ethernet frame (bottom figure).
(65536) time slices (Ethernet frames) each 100 microseconds long. The ES400 mod-
Independently of this, control variables can be transferred at the same time from the PC to the modules.
ETAS
4.6Power Supply
4.6.1Supply Voltage
DC/DC converters in every module guarantee both the operation as well as the
launch of the ES400 modules with supply voltages between 5 V and 50 V DC
over the entire temperature range.
With the power supply management of the ES420.1, you can use an automatic
power-saving feature (“Standby”) as well as a “Wake Up” function via the Ethernet interface.
4.6.2Supplying the ES400 Modules via the Connecting Line
In the simplest application case, the modules are directly linked to one another.
They are connected to the supply voltage via the previous module all the way.
4.6.3Additional Supply of the ES400 Modules via a Y-Boost Cable
If the supply voltage at the input of a module is too low because of the current
consumption of the previous modules, multiple feeding of the supply voltage
can guarantee this and the following modules sufficient supply voltage in longer module chains.
In this application case, you have to split the module chain. Swap the existing
connection cable between the two modules for a Y boost cable for additional,
direct feeding of the supply voltage. The module chain is now closed again and
the power supply of the following modules guaranteed.
The special design of the Y boost cable avoids reverse feeding into the front
parts of the module chain and thus arising potential differences.
When is it necessary to use a Y boost cable?
An exact calculation of the current consumption of a module chain is only possible if numerous variables are known:
•supply voltage of the first module at the input
•minimum supply voltage at the last module of the chain
•number and type of the modules
•consumption of sensor power supply of the connected sensors
•cable length
•cable type
•ambient temperature
The necessary minimum voltage for supplying power to the system must be
determined individually for each test set-up.
TIP
Please contact our local experts to discuss your particular ES420.1 configurations.
ES420.1 - User’s Guide28
ETAS
Example 1:
For module chains which are equipped exclusively with ES410.1 or ES441.1,
ETAS recommends the use of Y boost cables if the length of the module chain
is longer than 10 modules.
Example 2:
For module chains which are equipped exclusively with ES411.1 or ES413.1 or
ES421.1, ETAS recommends the use of Y boost cables if the length of the module chain
•is longer than 16 modules (without sensor feeding) or
•is longer than 10 modules (with sensor feeding).
Example 3:
For module chains which are equipped exclusively with ES415.1 or ES420.1,
ETAS recommends the use of Y boost cables if the length of the module chain
•is longer than 8 modules (without sensor feeding) or
•is longer than 5modules (with sensor feeding).
Example 4:
With a minimum voltage of 7.7 V, no additional feeding is necessary with a Y
cable if the module chain consists of the following modules:
•nine ES420.1 or ES421.1 and
•four ES410.1 or ES411.1 or ES413.1 (without sensor feeding) and
•one ES441.1
Example 5:
With a minimum voltage of 7.7 V, no additional feeding is necessary with a Y
cable if the module chain consists of the following modules:
•five ES420.1 or ES421.1 and
•two ES415.1 (without sensor feeding) and
•one ES441.1
Example 6:
With a minimum voltage of 9 V, no additional feeding is necessary with a Y
cable if the module chain consists of the following modules:
•nine ES420.1 or ES421.1 and
•four ES410.1 or ES411.1 or ES413.1 (with sensor feeding) and
•one ES441.1
ES420.1 - User’s Guide29
ETAS
Example 7:
With a minimum voltage of 9 V, no additional feeding is necessary with a Y
cable if the module chain consists of the following modules:
•five ES420.1 or ES421.1 and
•two ES415.1 (with sensor feeding) and
•one ES441.1
TIP
All examples apply at 85 °C ambient temperature.
ES420.1 - User’s Guide30
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