NI 9145 with NI 9476 + 9375 on TwinCAT doest work

[Gabriel Utomo]

Hi all,

 

I need to control a NI 9145 EtherCAT chassis using TwinCAT as the Master. In short,

This setup [1] works:

Slot 1: NI 9476 (wired only 1x DO to a simple Solenoid Valve, VSup & COM to 24V supply)
Slot 2-8: Empty

 

This setup [2] doesn't work:

Slot 1: NI 9476 (same as setup [1])
Slot 2: NI 9375 (no wire at all, only slotted in)

Slot 3-8: Empty

 

I generated the TwinCAT ESI files using the NI Slave XML Creator, from NI Industrial Comm for EtherCAT 2023.

Based on those 2 setup case, I don't think there is any problem on the electrical side.

 

On setup [2], everything looks fine for me on the TwinCAT side, NI 9145 state can change to "OP" and I can set the Online value, but there is no change on the actual DO output. 9476 = sourcing output, so I'm expecting a 24V, which is present if I use setup [1]).

I can read the CoE online data, and can also use the AoE - Online tab to read them manually.

https://forums.ni.com/t5/image/serverpage/image-id/357407iD344B63133C2AFBD/image-size/medium?v=v2&px=400

 

Tried:

1. Wire the NI 9375 (setup [2]). The Digital Input worked just fine, but the Output didn't work (both NI 9375 & 9476).

2. Swap the modules with a spare, didn't work.

3. Swap slot 1 & 2 (with their respective ESI files), didn't work.

 

Anyone encounter similar problem, or have any experience using NI 9476 + 9375 together in NI 9145 chassis (maybe using cRIO as the master)?

Attached is the ESI file i used for 9476 + 9375.

 

Thank you.

Gabriel.

DO_DIO.xml

[Neil Pate]

@Gabriel Utomo there is not much activity on LAVA these days. You might have more success if you post on the LabVIEW Discord http://discord.gg/labview

[ShaunR]

2 hours ago, Neil Pate said:

@Gabriel Utomo there is not much activity on LAVA these days. You might have more success if you post on the LabVIEW Discord http://discord.gg/labview

Unlikely.

[Neil Pate]

26 minutes ago, ShaunR said:

Unlikely.

Because of the people on Discord or because of NI's implementation of EtherCAT? 😉

 

[Rolf Kalbermatter]

On 9/14/2026 at 4:20 PM, Neil Pate said:

Because of the people on Discord or because of NI's implementation of EtherCAT? 😉

 

Both! NI's implementation of EtherCAT leaves a lot to be desired. As to Discord, it's not really the people on there but I just can't seem to manage and keep an overview on the various threads in Discord. Partly that is because I mostly look at it on mobile, but in a webbrowser on the PC it's not that much better, despite the bigger screen.

Edited 23 hours ago by Rolf Kalbermatter

[Neil Pate]

5 hours ago, Rolf Kalbermatter said:

Both! NI's implementation of EtherCAT leaves a lot to be desired. As to Discord, it's not really the people on there but I just can't seem to manage and keep an overview on the various threads in Discord. Partly that is because I mostly look at it on mobile, but in a webbrowser on the PC it's not that much better, despite the bigger screen.

It is a pity you don't get on so well with Discord, your presence over there is sorely missed.

[ShaunR]

19 minutes ago, Neil Pate said:

It is a pity you don't get on so well with Discord, your presence over there is sorely missed.

Discord is a poor support platform and I view Discord with the same contempt as IRC (and for similar reasons). If one thinks Lavag.org is a sub-optimal platform with little activity; answer the question or suggest posting the same question on NI.com. EtherCAT is a niche expertise and if you can't find help here or on NI.com, I very much doubt you will find it on your Discord server.

[Gabriel Utomo]

Hi all,

Thanks for the input. Sorry I missed the first few replies.

As for now, I've already create an NI technical support case on this problem. I also tried NI forum before with no luck.

[Neil Pate]

16 hours ago, ShaunR said:

Discord is a poor support platform and I view Discord with the same contempt as IRC (and for similar reasons). If one thinks Lavag.org is a sub-optimal platform with little activity; answer the question or suggest posting the same question on NI.com. EtherCAT is a niche expertise and if you can't find help here or on NI.com, I very much doubt you will find it on your Discord server.

IRC? Wow there is a blast from the past. Thank you for digging up some good old memories of many well spent nights spent at my university computer lab arguing with other randos on the internet about alien activity and other tin foil hat stuff 🤣
I did not realise that is where all the LabVIEW developers had gone...

 

Edited 1 hour ago by Neil Pate

[Rolf Kalbermatter]

1 hour ago, Neil Pate said:

IRC? Wow there is a blast from the past. Thank you for digging up some good old memories of many well spent nights spent at my university computer lab arguing with other randos on the internet about alien activity and other tin foil hat stuff 🤣

I never did the IRC thing, but started with mailing lists as the main support channel. I have quite fond memories of the Info-LabVIEW mailing list started by Tom Coradeschi and currently maintained by Scott Hannahs for posterity. Back when you had to actually connect a modem through your main telephone line in order to go onto the big, friendly (back then at least) internet, mailing lists were very handy as one could respond to the mails offline and then connect to the internet provider to send off all the mails in one batch.

Edited 27 minutes ago by Rolf Kalbermatter

[ShaunR]

23 minutes ago, Rolf Kalbermatter said:

I never did the IRC thing, but started with mailing lists as the main support channel. I have quite fond memories of the Info-LabVIEW mailing list started by Tom Coradeschi and currently maintained by Scott Hannahs for posterity. Back when you had to actually connect a modem through your main telephone line in order to go onto the big, friendly (back then at least) internet, mailing lists were very handy as one could respond to the mails offline and then connect to the internet provider to send off all the mails in one batch.

Mailing lists were great for maintainers, horrendous for users. Waiting a week to see if your question was answered and trawling through the archives in case you missed a response. I'm glad the days of IRC, Mailing Lists and, hopefully, Discord, are way behind us.