Questions tagged [ethercat]

For questions about EtherCAT (Ethernet for Control Automation Technology), an Ethernet-based fieldbus system.

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EtherCAT - Correct Shielding of Slaves

According to Beckhoff, the EtherCAT Standard needs correct shielding to work reliable, since EtherCAT cannot tollerate a lot of jitter: Beckhoff Shielding Correct shielding means, that the shield is ...
HansPeterLoft's user avatar
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1 answer
146 views

EtherCAT Communication Testing

I am working on a device that uses EtherCAT. On one side, I have the standard EtherCAT Connector - an RJ45. On the other side, I would like to experiment with different connectors. For starters, I ...
Marko Jurisic's user avatar
1 vote
2 answers
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Can a ring of etherCAT devices be connected to two ports of an existing Ethernet/IP switch? [closed]

I have a few etherCAT devices which each have a slave controller exposing two etherCAT interfaces, and I would like to connect them to the ethernet switch of my home network. Will I be able to set up ...
Mister Mystère's user avatar
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1 answer
111 views

Use 2 of the 8 cables of an existing ethernet connection

There is an Ethernet cable that runs from a server room to an office. That cable is connected to a router. There are times when ...
Tono Nam's user avatar
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1 vote
2 answers
873 views

Can the USB interface be used in real-time works

USB works similar to the Master and Slave architecture. There is an Host which is manage the bus as like a Master. There can be various "devices" which is managed by host like slaves. I wonder that ...
doner_t's user avatar
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1 answer
278 views

Is hard real time possible with Ethernet technology? [closed]

If I use EtherCAT to control a motor -- say I use RTnet + SOEM to control a servo drive using EtherCAT connectivity -- and the servo drive both controls and reads sensor value, than: is it necessary ...
Dinesh Lama's user avatar
1 vote
2 answers
2k views

Connection to ground for a Cat5e Shielded outdoor rated cable

My ISP installed the cable modem in my entertainment room. I am trying to have internet also in my STUDIO with an access point to broadcast a second WIFI from there to other parts of the house. (My ...
graygoo's user avatar
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1 answer
55 views

How can I set up a chained DAQ system with small off the shelve boards? [closed]

I'm building an exoskeleton in a student team and we're having some trouble finding the right prototyping system for our electronics system. All of the shelve systems are either too slow or too big. ...
Ortix92's user avatar
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1 answer
939 views

Microcontroller as a slave

I want to set up an EtherCAT Network, First I have installed IgH EtherCAT Master in my PC (Ubuntu 14.04) and RTAI 4.1 as RTOS Can I use microcontroller as a slave without any additional devices ...
The Special One's user avatar
1 vote
1 answer
970 views

High speed data from microcontrollers to pc using daisy chain

I have STM32F4 discovery boards. I have 30 such boards supporting maximum data of 128Mbps. The max data at any instance in complete system would be 300Mbps.I need to pick this data and send it to PC. ...
adeelm's user avatar
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10 votes
2 answers
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EMI Filtering on LVDS lines

This question is slightly related to: What's radiating on my PCB? These are Beckhoff's EtherCAT industrial IO modules. Each module is connected to its neighbours by 100mbps LVDS. Each module contains ...
Rocketmagnet's user avatar
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7 votes
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Calculating a simple CRC

In the datasheet for the ET1200 EtherCAT ASIC (page 94), I am told that I need to calculate a CRC of some of the 16-bit data in its EEPROM. The only description of this CRC is: Low byte [of word 7] ...
Rocketmagnet's user avatar
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2 votes
2 answers
2k views

Discrete Ethernet magnetics

Rather than using an Ethernet magnetics component, is it possible / reasonable to simply use individual isolating transformers? Inside the magnetics component, it's clearly made up of individual ...
Rocketmagnet's user avatar
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