Beckhoff EL3413-0000, EL3413-0001, EL3413-0120, EL3433 Documentation
Documentation
EL34x3
3-phase power measurement terminal
Version:
Date:
4.4
2019-03-28
Table of contents
Table of contents
1 Foreword ....................................................................................................................................................7
1.1 Product overview - Power measurement terminals ...........................................................................7
1.2 Notes on the documentation..............................................................................................................7
1.3 Safety instructions .............................................................................................................................9
1.4 Documentation issue status ............................................................................................................10
1.5 Version identification of EtherCAT devices .....................................................................................11
2 Product overview.....................................................................................................................................16
2.1 EL3413 ............................................................................................................................................16
2.1.1 Introduction ...................................................................................................................... 16
2.1.2 Technical data ................................................................................................................. 18
2.2 EL3433 ............................................................................................................................................19
2.2.1 Introduction ...................................................................................................................... 19
2.2.2 Technical data ................................................................................................................. 20
2.3 Basic function principles ..................................................................................................................21
2.3.1 Measuring principle.......................................................................................................... 21
2.3.2 RMS value calculation ..................................................................................................... 21
2.3.3 Effective power measurement ......................................................................................... 22
2.3.4 Apparent power measurement ........................................................................................ 22
2.3.5 Sign for power measurement........................................................................................... 24
2.3.6 Sign of the energy values ................................................................................................ 25
2.3.7 Frequency measurement................................................................................................. 25
2.4 Current transformer .........................................................................................................................25
2.5 Start .................................................................................................................................................26
3 Basics communication ...........................................................................................................................27
3.1 EtherCAT basics..............................................................................................................................27
3.2 EtherCAT cabling – wire-bound.......................................................................................................27
3.3 General notes for setting the watchdog...........................................................................................28
3.4 EtherCAT State Machine.................................................................................................................30
3.5 CoE Interface...................................................................................................................................32
3.6 Distributed Clock .............................................................................................................................37
4 Installation................................................................................................................................................38
4.1 Instructions for ESD protection........................................................................................................38
4.2 Installation on mounting rails ...........................................................................................................38
4.3 Connection ......................................................................................................................................41
4.3.1 Connection system .......................................................................................................... 41
4.3.2 Wiring............................................................................................................................... 44
4.3.3 Shielding .......................................................................................................................... 45
4.4 Installation positions ........................................................................................................................45
4.5 Positioning of passive Terminals .....................................................................................................48
4.6 UL notice .........................................................................................................................................48
4.7 EL34x3 - LEDs and connection .......................................................................................................50
4.7.1 EL3413-0000 ................................................................................................................... 50
4.7.2 EL3413-0001 ................................................................................................................... 53
EL34x3 3Version: 4.4
Table of contents
4.7.3 EL3413-0120 ................................................................................................................... 56
4.7.4 EL3433-0000 ................................................................................................................... 59
5 Commissioning........................................................................................................................................62
5.1 TwinCAT Quick Start .......................................................................................................................62
5.1.1 TwinCAT2 ....................................................................................................................... 65
5.1.2 TwinCAT 3 ....................................................................................................................... 75
5.2 TwinCAT Development Environment ..............................................................................................87
5.2.1 Installation of the TwinCAT real-time driver..................................................................... 87
5.2.2 Notes regarding ESI device description........................................................................... 93
5.2.3 TwinCAT ESI Updater ..................................................................................................... 97
5.2.4 Distinction between Online and Offline............................................................................ 97
5.2.5 OFFLINE configuration creation ...................................................................................... 98
5.2.6 ONLINE configuration creation ...................................................................................... 103
5.2.7 EtherCAT subscriber configuration................................................................................ 111
5.3 General Notes - EtherCAT Slave Application................................................................................120
5.4 Process data..................................................................................................................................128
5.4.1 Sync Manager (SM)....................................................................................................... 128
5.4.2 Operating modes and settings....................................................................................... 131
5.4.3 Predefined PDO Assignment......................................................................................... 133
5.5 Start-up and parameter configuration............................................................................................133
5.5.1 Settings.......................................................................................................................... 133
5.5.2 Measurements ............................................................................................................... 135
5.5.3 Scaling factors ............................................................................................................... 139
5.6 Notices on analog specifications ...................................................................................................140
5.6.1 Full scale value (FSV).................................................................................................... 141
5.6.2 Measuring error/ measurement deviation ...................................................................... 141
5.6.3 Temperature coefficient tK [ppm/K] ............................................................................... 142
5.6.4 Single-ended/differential typification .............................................................................. 143
5.6.5 Common-mode voltage and reference ground (based on differential inputs)................ 148
5.6.6 Dielectric strength .......................................................................................................... 148
5.6.7 Temporal aspects of analog/digital conversion.............................................................. 149
5.7 Object description and parameterization .......................................................................................152
5.7.1 Restore object................................................................................................................ 152
5.7.2 Configuration data ......................................................................................................... 153
5.7.3 Command object............................................................................................................ 153
5.7.4 Configuration data (vendor-specific).............................................................................. 155
5.7.5 Input data....................................................................................................................... 158
5.7.6 Output data .................................................................................................................... 163
5.7.7 Information and diagnostic data..................................................................................... 163
5.7.8 Standard objects............................................................................................................ 165
6 Diagnostics – basic principles of diag messages..............................................................................173
7 Appendix ................................................................................................................................................183
7.1 EtherCAT AL Status Codes...........................................................................................................183
7.2 Firmware compatibility...................................................................................................................183
7.3 Firmware Update EL/ES/EM/ELM/EPxxxx ....................................................................................184
EL34x34 Version: 4.4
Table of contents
7.3.1 Device description ESI file/XML..................................................................................... 185
7.3.2 Firmware explanation .................................................................................................... 188
7.3.3 Updating controller firmware *.efw................................................................................. 189
7.3.4 FPGA firmware *.rbf....................................................................................................... 190
7.3.5 Simultaneous updating of several EtherCAT devices.................................................... 194
7.4 Restoring the delivery state ...........................................................................................................195
7.5 Support and Service ......................................................................................................................196
EL34x3 5Version: 4.4
Table of contents
EL34x36 Version: 4.4
1 Foreword
1.1 Product overview - Power measurement terminals
EL3413 [}16]
3-phase power measurement terminal up to 690 V AC
EL3413-0001 [}16]
3-phase power measurement terminal up to 600 V AC, UL approval
EL3413-0120 [}16]
3-phase power measurement terminal up to 210 V AC
EL3433 [}19]
3-phase power measurement terminal up to 500 V AC, 10A
1.2 Notes on the documentation
Foreword
Intended audience
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
It is essential that the documentation and the following notes and explanations are followed when installing
and commissioning these components.
It is the duty of the technical personnel to use the documentation published at the respective time of each
installation and commissioning.
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.
Disclaimer
The documentation has been prepared with care. The products described are, however, constantly under
development.
We reserve the right to revise and change the documentation at any time and without prior announcement.
No claims for the modification of products that have already been supplied may be made on the basis of the
data, diagrams and descriptions in this documentation.
Trademarks
Beckhoff®, TwinCAT®, EtherCAT®, EtherCATP®, SafetyoverEtherCAT®, TwinSAFE®, XFC® and XTS® are
registered trademarks of and licensed by Beckhoff Automation GmbH.
Other designations used in this publication may be trademarks whose use by third parties for their own
purposes could violate the rights of the owners.
Patent Pending
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, DE102004044764, DE102007017835 with corresponding applications or
registrations in various other countries.
The TwinCAT Technology is covered, including but not limited to the following patent applications and
patents: EP0851348, US6167425 with corresponding applications or registrations in various other countries.
EL34x3 7Version: 4.4
Foreword
EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH,
Germany.
Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The reproduction, distribution and utilization of this document as well as the communication of its contents to
others without express authorization are prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a
patent, utility model or design.
EL34x38 Version: 4.4
Foreword
1.3 Safety instructions
Safety regulations
Please note the following safety instructions and explanations!
Product-specific safety instructions can be found on following pages or in the areas mounting, wiring,
commissioning etc.
Exclusion of liability
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH & Co. KG.
Personnel qualification
This description is only intended for trained specialists in control, automation and drive engineering who are
familiar with the applicable national standards.
Description of instructions
In this documentation the following instructions are used.
These instructions must be read carefully and followed without fail!
DANGER
Serious risk of injury!
Failure to follow this safety instruction directly endangers the life and health of persons.
WARNING
Risk of injury!
Failure to follow this safety instruction endangers the life and health of persons.
CAUTION
Personal injuries!
Failure to follow this safety instruction can lead to injuries to persons.
NOTE
Damage to environment/equipment or data loss
Failure to follow this instruction can lead to environmental damage, equipment damage or data loss.
Tip or pointer
This symbol indicates information that contributes to better understanding.
EL34x3 9Version: 4.4
Foreword
1.4 Documentation issue status
Version Comment
4.4 • Update chapter "LEDs and connection"
• Update structure
• Update revision status
4.3 • Update chapter "Technical data"
• Update chapter "Connection system" -> "Connection"
• Update structure
• Update revision status
4.2 • Update revision status
• Update structure
4.1 • Update chapter "Technical data"
• Update structure
4.0 • Update chapter "Technical data"
• Update chapter "Basic function principles"
• Update chapter "Process data"
• Update chapter "Start-up and parameter configuration"
• Update chapter "Object description and parameterization"
• Update revision status
• Update structure
3.9 • Update chapter "Technical data"
• Update structure
3.8 • Update chapter "Technical data"
• Update chapter “Measurements”
• Update structure
3.7 • Update chapter "Technical data"
• Update chapter “Measurements”
• Addenda chapter "Instructions for ESD protection"
• Update chapter "Notices on Analog specification"
• Update chapter "Diagnostics - basic principles of diag messages"
• Update revision status
3.6 • Update chapter "Start-up and parameter configuration"
3.5 • Update chapter "Notes on the documentation"
• Correction of Technical data
• Addenda chapter "TwinCAT Quick Start"
• Update chapter "Diagnostics – basic principles of diag messages"
3.4 • Update chapter "Object description"
• Update revision status
• Update structure
3.3 • Update chapter "Object description"
• Update structure
3.2 • Update chapter "process data, setting"
• Update structure
3.1 • Update chapter "scaling factors"
• Update structure
EL34x310 Version: 4.4
Version Comment
3.0 • Migration
• Update structure
• Update revision status
2.2 • Update chapter "Object description and parameterization"
• “Technical data” section updated
• Update revision status
• Update structure
2.1 • “Technical data” section updated
• Update revision status
• Update structure
2.0 • Update chapter "Introduction"
• Update chapter "Current transformer"
• Update structure
1.9 • Addenda chapter "LEDs and connection"
• Update chapter "Process data"
• Update chapter "Measurements"
• Update chapter "Object description and parameterization"
• Update chapter "Scaling factors"
• Update revision status
• Update structure
1.8 • Addenda chapter "LEDs and connection"
1.7 • Update chapter "Scaling factors"
1.6 • Update structure
• Addendum EL3413-0001, EL3413-0120, EL3433
1.5 • Update "Technical data"
1.4 • Update "Technical data"
1.3 • Update "Object description"
1.2 • Update "Object description"
1.1 • Update "Technical data"
1.0 • Addenda, 1st public issue
0.1 • Provisional documentation for EL3413
Foreword
1.5 Version identification of EtherCAT devices
Designation
A Beckhoff EtherCAT device has a 14-digit designation, made up of
• family key
• type
• version
• revision
Example Family Type Version Revision
EL3314-0000-0016 EL terminal
(12 mm, nonpluggable connection
level)
ES3602-0010-0017 ES terminal
(12 mm, pluggable
connection level)
CU2008-0000-0000 CU device 2008 (8-port fast ethernet switch) 0000 (basic type) 0000
3314 (4-channel thermocouple
terminal)
3602 (2-channel voltage
measurement)
0000 (basic type) 0016
0010 (high-
0017
precision version)
EL34x3 11Version: 4.4
Foreword
Notes
• The elements mentioned above result in the technical designation. EL3314-0000-0016 is used in the
example below.
• EL3314-0000 is the order identifier, in the case of “-0000” usually abbreviated to EL3314. “-0016” is the
EtherCAT revision.
• The order identifier is made up of
- family key (EL, EP, CU, ES, KL, CX, etc.)
- type (3314)
- version (-0000)
• The revision -0016 shows the technical progress, such as the extension of features with regard to the
EtherCAT communication, and is managed by Beckhoff.
In principle, a device with a higher revision can replace a device with a lower revision, unless specified
otherwise, e.g. in the documentation.
Associated and synonymous with each revision there is usually a description (ESI, EtherCAT Slave
Information) in the form of an XML file, which is available for download from the Beckhoff web site.
From 2014/01 the revision is shown on the outside of the IP20 terminals, see Fig. “EL5021 EL terminal,
standard IP20 IO device with batch number and revision ID (since 2014/01)”.
• The type, version and revision are read as decimal numbers, even if they are technically saved in
hexadecimal.
Identification number
Beckhoff EtherCAT devices from the different lines have different kinds of identification numbers:
Production lot/batch number/serial number/date code/D number
The serial number for Beckhoff IO devices is usually the 8-digit number printed on the device or on a sticker.
The serial number indicates the configuration in delivery state and therefore refers to a whole production
batch, without distinguishing the individual modules of a batch.
Structure of the serial number: KKYYFFHH
KK - week of production (CW, calendar week)
YY - year of production
FF - firmware version
HH - hardware version
Example with
Ser. no.: 12063A02: 12 - production week 12 06 - production year 2006 3A - firmware version 3A 02 hardware version 02
Exceptions can occur in the IP67 area, where the following syntax can be used (see respective device
documentation):
Syntax: D ww yy x y z u
D - prefix designation
ww - calendar week
yy - year
x - firmware version of the bus PCB
y - hardware version of the bus PCB
z - firmware version of the I/O PCB
u - hardware version of the I/O PCB
Example: D.22081501 calendar week 22 of the year 2008 firmware version of bus PCB: 1 hardware version
of bus PCB: 5 firmware version of I/O PCB: 0 (no firmware necessary for this PCB) hardware version of I/O
PCB: 1
Unique serial number/ID, ID number
In addition, in some series each individual module has its own unique serial number.
See also the further documentation in the area
EL34x312 Version: 4.4
• IP67: EtherCAT Box
• Safety: TwinSafe
• Terminals with factory calibration certificate and other measuring terminals
Examples of markings
Fig.1: EL5021 EL terminal, standard IP20 IO device with serial/ batch number and revision ID (since
2014/01)
Foreword
Fig.2: EK1100 EtherCAT coupler, standard IP20 IO device with serial/ batch number
Fig.3: CU2016 switch with serial/ batch number
EL34x3 13Version: 4.4
Foreword
Fig.4: EL3202-0020 with serial/ batch number 26131006 and unique ID-number 204418
Fig.5: EP1258-00001 IP67 EtherCAT Box with batch number/ date code 22090101 and unique serial
number 158102
Fig.6: EP1908-0002 IP67 EtherCAT Safety Box with batch number/ date code 071201FF and unique serial
number 00346070
Fig.7: EL2904 IP20 safety terminal with batch number/ date code 50110302 and unique serial number
00331701
EL34x314 Version: 4.4
Foreword
Fig.8: ELM3604-0002 terminal with unique ID number (QR code) 100001051 and serial/ batch number
44160201
EL34x3 15Version: 4.4
Product overview
2 Product overview
2.1 EL3413
2.1.1 Introduction
Fig.9: EL3413
Fig.10: EL3413-0001
EL34x316 Version: 4.4
Fig.11: EL3413-0120
Product overview
3-Phase Power Measurement Terminal
The EL3413 EtherCAT power measurement terminal is a further development of the EL3403. With up to
690VAC the voltage inputs are optimized for direct monitoring of high-performance generators, as used in
the wind power industry, for sample.
The full scale value for the current can be set to 0.1 A, 1 A or 5 A via the CoE directory.
No upstream voltage transformer is required. The current inputs are electrically isolated so that the terminal
can be used in all common grounded current transformer configurations such as 2- or 3-transformer
configurations with star or delta connection.
Like all measured terminal data, the harmonic content can be read via the process data.
The EL3413-0001 has a maximum input voltage of 600 V AC and is additionally UL-certified.
In the case of the EL3413-0120 the voltage range is limited to 210 V AC.
Quick links
• EtherCAT basics
• Basic function principles EL34x3 [}21]
• CoE object description and parameterization [}152]
• Process data and operating modes [}128]
EL34x3 17Version: 4.4
Product overview
2.1.2 Technical data
Technical data EL3413-0000 EL3413-0001 EL3413-0120
Measured values Current, voltage, effective power, apparent power, frequency
Calculated values Reactive power, energy, power factor (cosφ), harmonic frequencies,
phase angle
Measuring voltage max. 690VAC3~
(ULX-N: max. 400VAC)
Fed-in voltages must comply with overvoltage category II
Measuring current max. 5A (AC) (configurable), via measuring transformerxA/5A
Input resistance voltage circuit
(typ.)
Input resistance current circuit
(typ.)
Fuse protection Voltage circuit: according to the connected conductor size
Resolution 0.1µA, 0.1mV, 10mW
Measuring accuracy 0.5% in relation to the full scale value (U/I),
Frequency range 45Hz to 65Hz
Signal type any (taking into account the frequency range and the limit frequency)
Measuring procedure True RMS calculation with 16,800 (2,800 per channel)samples/s
Measuring cycle time 200ms per measured value preset, freely configurable, mains-
Electrical isolation 4500V (connection terminal/E-bus)
Supply voltage for electronic via the E-bus
E-Bus current consumption typ. 160mA
Configuration via TwinCAT System Manager
Dimensions (W x H x D) approx. 27mm x 100mm x 70mm (width aligned: 24mm)
Weight approx. 75g
Mounting [}38]
Operating temperature -25°C ... +60°C (extended temperature range)
Storage temperature -40°C ... +85°C
Relative humidity 95 % no condensation
Vibration/shock resistance conforms to EN 60068-2-6 / EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2 / EN 61000-6-4
Protect. class / installation pos. IP20/any
Approvals CE CE
1MΩ
<3mΩ
Current circuit: primary side of the current transformer, according to the
connected conductor size
(0.1A measuring
range)
1µA, 0.1mV, 10mW
(1A measuring range)
5µA, 0.1mV, 10mW
(5A measuring range)
1% calculated value (P)
Notice:
For the EL3413, an accuracy of 2% FSV (full scale value) of the largest
measuring range of the terminal is valid referring to the neutral conductor
current measurement. The neutral conductor current measurement is only
possible for this measuring range.
synchronous
on 35mm mounting rail conforms to EN 60715
max. 600VAC3~
(ULX-N: max. 346VAC)
1µA, 0.1mV, 10mW
(1A measuring range)
5µA, 0.1mV, 10mW
(5A measuring range)
cULus [}48]
max. 210 VAC3~
(ULX-N: max. 120VAC)
0.1µA, 0.1mV, 10mW
(0.1A measuring
range)
1µA, 0.1mV, 10mW
(1A measuring range)
5µA, 0.1mV, 10mW
(5A measuring range)
CE
EL34x318 Version: 4.4
2.2 EL3433
2.2.1 Introduction
Product overview
Fig.12: EL3433
3-phase power measurement terminal, 500 V AC, 10 A
The EL3433 EtherCAT power measurement terminal is a further development of the EL3403.
Currents of up to 10A can be directly measured with the internal current transformers. Hence, there are no
additional costs for external current transformers. The external bridges 5&1', 6&2' and 7&3' are already
pre-wired. As a result it is possible to directly connect the supply voltage (5', 6' and 7') and the consumer (1,
2 and 3).
The EL3433 can deal with simple network analysis up to the 21stharmonic analysis. Like all measured
terminal data, the harmonic content can be read via the process data.
Quick links
• EtherCAT basics
• Basic function principles EL34x3 [}21]
• CoE object description and parameterization [}152]
• Process data and operating modes [}128]
EL34x3 19Version: 4.4
Product overview
2.2.2 Technical data
Technical data EL3433
Measured values Current, voltage, effective power, apparent power, frequency
Calculated values Reactive power, energy, power factor (cosφ), harmonic frequencies,
phase angle
Measuring voltage max. 500VAC3~ (ULX-N: max. 288VAC)
Fed-in voltages must comply with overvoltage category II
Measuring current max. 10A (AC) (configurable)
Input resistance voltage circuit
(typ.)
Input resistance current circuit
(typ.)
Fuse protection Voltage circuit: according to the connected conductor size
Resolution 1µA, 0.1mV, 10mW
Measuring accuracy 0.5% in relation to the full scale value (U/I) (at 0°C…55°C)
Frequency range 45Hz to 65Hz
Signal type any (taking into account the frequency range and the limit frequency)
Measuring procedure True RMS calculation with 16,800 (2,800 per channel)samples/s
Measuring cycle time 200ms per measured value preset, freely configurable, mains-
Electrical isolation 4500V (connection terminal/E-bus)
Supply voltage for electronic via the E-bus
E-Bus current consumption 200mA typ.
Configuration via TwinCAT System Manager
Dimensions (W x H x D) approx. 27mm x 100mm x 70mm (width aligned: 24mm)
Weight approx. 100g
Mounting [}38]
Operating temperature -25 °C ... +60 °C (extended temperature range)
Storage temperature -40 °C ... +85 °C
Relative humidity 95 % no condensation
Vibration/shock resistance conforms to EN 60068-2-6 / EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2 / EN 61000-6-4
Protect. class / installation pos. IP20/any
Approvals CE
1MΩ
<3mΩ
Current circuit: primary side of the current transformer, according to the
connected conductor size
1% in relation to the full scale value (U/I) (when the extended temperature
range is used)
1% calculated value (P)
Notice:
For the EL3433, an accuracy of 2% FSV (full scale value) of the largest
measuring range of the terminal is valid referring to the neutral conductor
current measurement. The neutral conductor current measurement is only
possible for this measuring range.
synchronous
on 35mm mounting rail conforms to EN 60715
cULus [}48]
EL34x320 Version: 4.4
Product overview
2.3 Basic function principles
2.3.1 Measuring principle
The EL34x3 terminals operate with 1 analog/digital converter for measuring the current and voltage variables
of all three phases.
The measurement and processing of the three phases take place successively (45 µs offset) in exactly the
same way. The signal processing for one phase is described below. This description applies correspondingly
for all three phases.
Fig.13: Voltage u and current i curves
2.3.2 RMS value calculation
The rms value for voltage and current is calculated over a measuring interval, in this case the period T. The
following equations are used:
u
: instantaneous voltage value
(t)
i
: instantaneous current value
(t)
n: number of measured values
Measuring interval
The choice of the right measuring interval is important for the quality of the measurement. The default setting
for the measuring interval is 10periods (10 x 20ms). Experience shows that this is a good compromise
between measuring speed and stability. Deviations from this value are only advisable in the event of
particular measurement requirements (e.g. high measuring speed).
EL34x3 21Version: 4.4
Product overview
2.3.3 Effective power measurement
The EL34x3 measures the effective power P according to the following equation
P: Active power
n: Number of samples
u
: Instantaneous voltage value
(t)
i
: instantaneous current value
(t)
Fig.14: Power s
In the first step, the power s
curve
(t)
is calculated at each sampling instant:
(t)
The mean value over the measuring interval is calculated. Here too, the correct choice of the intervals is
important, as described in section RMS value measurement (the interval can only be changed
simultaneously for U, I and P).
The power frequency is twice that of the corresponding voltages and currents.
2.3.4 Apparent power measurement
In real networks, not all consumers are purely ohmic. Phase shifts occur between current and voltage. This
does not affect the methodology for determining the rms values of voltage and current as described above.
The situation for the effective power is different: Here, the product of effective voltage and effective current is
the apparent power.
The effective power is smaller than the apparent power.
EL34x322 Version: 4.4
S: Apparent power
P: Active power
Q: Reactive power
φ: Phase shift angle
Product overview
Fig.15: u
, i
, p
(t)
curves with phase shift angle φ
(t)
(t)
In this context, further parameters of the mains system and its consumers are significant:
• apparent power S
• reactive power Q
• power factor cos φ
The EL34x3 determines the following values:
EL34x3 23Version: 4.4
Product overview
• effective power P
• effective voltage U
• effective current I
• apparent power S
• reactive power Q
• power factor cos φ
• harmonic
• phase shift λ
2.3.5 Sign for power measurement
The sign of the active power P and of the power factor cos φ provide about information the direction of the
energy flow. A positive sign indicates the motor mode, a negative sign indicates generator mode.
In addition, the sign of the reactive power Q indicates the direction of the phase shift between current and
voltage. Fig. Four-quadrant representation of active/reactive power in motor and generator mode illustrates
this. In motor mode (quadrant I & IV) a positive reactive power indicates an inductive load, a negative
reactive power indicates a capacitive load. In generator mode (quadrant II & III), an inductive acting
generator is indicated by a positive reactive power, a capacitive acting generator by a negative reactive
power.
Fig.16: Four-quadrant representation of active/reactive power in motor and generator mode
EL34x324 Version: 4.4
2.3.6 Sign of the energy values
Name Index Variant Value AUX channel CoE
Energy
difference
Energy
negative
Energy
positive
Energy
difference
(automatically
saved)
Energy
negative
(automatically
saved)
Positive
energy
(automatically
saved)
Sum (Ch 0) Channel ac-
cess (Ch
11/12/13)
2 |E+| - |E-| ∑ |E+| - ∑ |E-| |E+| - |E-| N/A N/A
5 -|E-| ∑ |E-| |E-| |E-| |E-|
30 |E+| ∑ |E+| |E+| |E+| |E+|
32 |E+| - |E-| ∑ |E+| - ∑ |E-| |E+| - |E-| N/A N/A
35 -|E-| ∑ |E-| |E-| |E-| |E-|
31 |E+| |E+| |E+| |E+| |E+|
0x90n0 0xF801
Product overview
*)
*) Access only possible from PLC
2.3.7 Frequency measurement
The EL34x3 can measure the frequency of the input signals at a voltage circuit (L1, L2 or L3).
Held frequency
The last frequency is displayed via indexes 46, 47 and 48, "Held Frequency", before one or more channels
report an "Undervoltage" or "Missing Zero Crossing" error.
The values may not represent the actual mains frequency (see also last note in chapter "PM Inputs Channel
1/2/3 [}137]").
2.4 Current transformer
In principle, the choice of current transformer for the EL34x3 is not critical. The internal resistance within the
current circuit of the EL34x3 is so small that it is negligible for the calculation of the total resistances of the
current loop. The transformers must be able to supply a secondary rated current in accordance with the set
measuring range. The primary rated current Ipn can be selected arbitrarily. The common permissible overload
of 1.2 x Ipn is no problem for the EL34x3, but may lead to small measuring inaccuracies.
Accuracy
Please note that the overall accuracy of the set-up consisting of EL34x3 and current transformers to a large
degree depends on the accuracy class of the transformers.
No approval as a billing meter
A set-up with a class 0.5 current transformer cannot be approved or authenticated. The EL34x3 is
not an approved billing meter according to the electricity meter standard (DIN43856).
EL34x3 25Version: 4.4
Product overview
Current types
The EL34x3 terminals can measure AC currents with a frequency of 45 Hz to 65 Hz and up to their 21
harmonic. Since such currents are frequently created by inverters and may contain frequencies of less than
50 Hz or even a DC component, electronic transformers should be used for such applications.
Overcurrent limiting factor FS
The overcurrent limiting factor FS of a current transformer indicates at what multiple of the primary rated
current the current transformer changes to saturation mode, in order to protect the connected measuring
instruments.
st
NOTE
Attention! Risk of damage to the device!
The EL34x3 terminals may not be continuously loaded with more than 5 A [EL3413-xxxx] or 10A [EL3433xxxx] respectively! Additional intermediate transformers must be used in systems in which the overcurrent
limiting factors of the transformer allow higher secondary currents!
Protection against dangerous touch voltages
During appropriate operation of the EL34x3 with associated current transformers, no dangerous voltages
occur. The secondary voltage is in the range of a few Volts. However, the following faults may lead to
excessive voltages:
• Open current circuit of one or several transformers
• Neutral conductor cut on the voltage measurement side of the EL34x3
• General insulation fault
WARNING
WARNING Risk of electric shock!
The complete wiring of the EL34x3 must be protected against accidental contact and equipped with associated warnings! The insulation should be designed for the maximum conductor voltage of the system to be
measured!
The EL3413-xxxxx [}18] or EL3433-xxxx [}20] allows the maximum voltage for normal conditions as specified
in the technical data. The conductor voltage on the current side must not exceed this value! For higher
voltages, an intermediate transformer stage should be used!
An EL34x3 is equipped with a protective impedance of typically 1MΩ on the voltage measurement side. If
the neutral conductor is not connected and only one connection is live on the voltage measurement side, the
resulting voltage against earth in a 3-phase system with a specific line-to-line voltage [}18] is reduced by
the factor √3. This should also be measured on the side of the current measurement using a multimeter with
an internal resistance of 10 MΩ, which does not represent an insulation fault.
Additional measuring instruments in the current circuit
Please note that the addition of additional measuring instruments (e.g. ammeters) in the current circuit can
lead to a significant increase in the total apparent power.
2.5 Start
For commissioning:
• mount the EL34x3 as described in the chapter Mounting and wiring [}38]
• configure the EL34x3 in TwinCAT as described in the chapter Commissioning [}62].
EL34x326 Version: 4.4
Basics communication
3 Basics communication
3.1 EtherCAT basics
Please refer to the EtherCAT System Documentation for the EtherCAT fieldbus basics.
3.2 EtherCAT cabling – wire-bound
The cable length between two EtherCAT devices must not exceed 100 m. This results from the FastEthernet
technology, which, above all for reasons of signal attenuation over the length of the cable, allows a maximum
link length of 5 + 90 + 5 m if cables with appropriate properties are used. See also the Design
recommendations for the infrastructure for EtherCAT/Ethernet.
Cables and connectors
For connecting EtherCAT devices only Ethernet connections (cables + plugs) that meet the requirements of
at least category 5 (CAt5) according to EN 50173 or ISO/IEC 11801 should be used. EtherCAT uses 4 wires
for signal transfer.
EtherCAT uses RJ45 plug connectors, for example. The pin assignment is compatible with the Ethernet
standard (ISO/IEC 8802-3).
Pin Color of conductor Signal Description
1 yellow TD + Transmission Data +
2 orange TD - Transmission Data 3 white RD + Receiver Data +
6 blue RD - Receiver Data -
Due to automatic cable detection (auto-crossing) symmetric (1:1) or cross-over cables can be used between
EtherCAT devices from Beckhoff.
Recommended cables
Suitable cables for the connection of EtherCAT devices can be found on the Beckhoff website!
E-Bus supply
A bus coupler can supply the EL terminals added to it with the E-bus system voltage of 5V; a coupler is
thereby loadable up to 2A as a rule (see details in respective device documentation).
Information on how much current each EL terminal requires from the E-bus supply is available online and in
the catalogue. If the added terminals require more current than the coupler can supply, then power feed
terminals (e.g. EL9410) must be inserted at appropriate places in the terminal strand.
The pre-calculated theoretical maximum E-Bus current is displayed in the TwinCAT System Manager. A
shortfall is marked by a negative total amount and an exclamation mark; a power feed terminal is to be
placed before such a position.
EL34x3 27Version: 4.4
Basics communication
Fig.17: System manager current calculation
NOTE
Malfunction possible!
The same ground potential must be used for the E-Bus supply of all EtherCAT terminals in a terminal block!
3.3 General notes for setting the watchdog
ELxxxx terminals are equipped with a safety feature (watchdog) that switches off the outputs after a
specifiable time e.g. in the event of an interruption of the process data traffic, depending on the device and
settings, e.g. in OFF state.
The EtherCAT slave controller (ESC) in the EL2xxx terminals features 2 watchdogs:
• SM watchdog (default: 100 ms)
• PDI watchdog (default: 100 ms)
SM watchdog (SyncManager Watchdog)
The SyncManager watchdog is reset after each successful EtherCAT process data communication with the
terminal. If no EtherCAT process data communication takes place with the terminal for longer than the set
and activated SM watchdog time, e.g. in the event of a line interruption, the watchdog is triggered and the
outputs are set to FALSE. The OP state of the terminal is unaffected. The watchdog is only reset after a
successful EtherCAT process data access. Set the monitoring time as described below.
The SyncManager watchdog monitors correct and timely process data communication with the ESC from the
EtherCAT side.
PDI watchdog (Process Data Watchdog)
If no PDI communication with the EtherCAT slave controller (ESC) takes place for longer than the set and
activated PDI watchdog time, this watchdog is triggered.
PDI (Process Data Interface) is the internal interface between the ESC and local processors in the EtherCAT
slave, for example. The PDI watchdog can be used to monitor this communication for failure.
The PDI watchdog monitors correct and timely process data communication with the ESC from the
application side.
The settings of the SM- and PDI-watchdog must be done for each slave separately in the TwinCAT System
Manager.
EL34x328 Version: 4.4
Basics communication
Fig.18: EtherCAT tab -> Advanced Settings -> Behavior -> Watchdog
Notes:
• the multiplier is valid for both watchdogs.
• each watchdog has its own timer setting, the outcome of this in summary with the multiplier is a
resulting time.
• Important: the multiplier/timer setting is only loaded into the slave at the start up, if the checkbox is
activated.
If the checkbox is not activated, nothing is downloaded and the ESC settings remain unchanged.
Multiplier
Multiplier
Both watchdogs receive their pulses from the local terminal cycle, divided by the watchdog multiplier:
1/25 MHz * (watchdog multiplier + 2) = 100 µs (for default setting of 2498 for the multiplier)
The standard setting of 1000 for the SM watchdog corresponds to a release time of 100 ms.
The value in multiplier + 2 corresponds to the number of basic 40 ns ticks representing a watchdog tick.
The multiplier can be modified in order to adjust the watchdog time over a larger range.
EL34x3 29Version: 4.4
Basics communication
Example "Set SM watchdog"
This checkbox enables manual setting of the watchdog times. If the outputs are set and the EtherCAT
communication is interrupted, the SM watchdog is triggered after the set time and the outputs are erased.
This setting can be used for adapting a terminal to a slower EtherCAT master or long cycle times. The
default SM watchdog setting is 100 ms. The setting range is 0..65535. Together with a multiplier with a range
of 1..65535 this covers a watchdog period between 0..~170 seconds.
Calculation
Multiplier = 2498 → watchdog base time = 1 / 25MHz * (2498 + 2) = 0.0001seconds = 100µs
SM watchdog = 10000 → 10000 * 100µs = 1second watchdog monitoring time
CAUTION
Undefined state possible!
The function for switching off of the SM watchdog via SM watchdog = 0 is only implemented in terminals
from version -0016. In previous versions this operating mode should not be used.
CAUTION
Damage of devices and undefined state possible!
If the SM watchdog is activated and a value of 0 is entered the watchdog switches off completely. This is
the deactivation of the watchdog! Set outputs are NOT set in a safe state, if the communication is interrupted.
3.4 EtherCAT State Machine
The state of the EtherCAT slave is controlled via the EtherCAT State Machine (ESM). Depending upon the
state, different functions are accessible or executable in the EtherCAT slave. Specific commands must be
sent by the EtherCAT master to the device in each state, particularly during the bootup of the slave.
A distinction is made between the following states:
• Init
• Pre-Operational
• Safe-Operational and
• Operational
• Boot
The regular state of each EtherCAT slave after bootup is the OP state.
EL34x330 Version: 4.4
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