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  • PCW
  • PCW's Avatar
21 Jun 2025 14:53

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

Are holding registers at 0003 and 0004 readable?
  • AdelRTP
  • AdelRTP
21 Jun 2025 14:09

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

Hello Bro's;
I m trying to control (read/write ) data from MR-JE mistubishi servo drive using the 7I76EU mesa board, using PKTUART, i could reveive data from mitsubishi HMI but when i tried reading the data from the servo drive, it seems like the connection happened but there is not data reed and when i run the linuxcnc it take time to open not like usual time and two type of error appear as shown on the pic bellow. you will find also the .HAL configuration file and the C file where i put the adresse i wanted to read 
 
  • AdelRTP
  • AdelRTP
20 Jun 2025 21:34

Mesaflash 3.4.9 shows "Unsupported ethernet device 7I76EU" despite successful pi

Category: Driver Boards

Thanks bro, I try to download it several times but didn't work, until i use an other pc problem in my pc
 
  • PCW
  • PCW's Avatar
20 Jun 2025 20:49 - 20 Jun 2025 20:50

Mesaflash 3.4.9 shows "Unsupported ethernet device 7I76EU" despite successful pi

Category: Driver Boards

You would load the 7I76eu firmware that includes PKTUart support

7i76eu_7i76x1_pktv3d.bin

This file is in the 7i76eu.zip archive downloaded from Mesa's store (in the specifications tab)

You program it with mesaflash, something like:

mesaflash --device 7i76eu --addr 10.10.10.10 --write 7i76eu_7i76x1_pktv3d.bin --reload

 
  • AdelRTP
  • AdelRTP
20 Jun 2025 20:34

Mesaflash 3.4.9 shows "Unsupported ethernet device 7I76EU" despite successful pi

Category: Driver Boards

Hi andypugh,
i dont know how to flash the pktUART, i dont know how to download it, i want to use it to control mr-je driver from Mitsubishi
 
  • andypugh
  • andypugh's Avatar
20 Jun 2025 20:08

Mesaflash 3.4.9 shows "Unsupported ethernet device 7I76EU" despite successful pi

Category: Driver Boards

thanks a lot Tommy,
i’m trying to control two servo drives (Modbus RTU) with a Mesa 7i76EU in LinuxCNC, but I can’t use Classic Ladder or PktUART

Have you spotted the new Modbus / PktUART driver? It's more flexible that mesa_modbus. (but only exists in the dev version of LinuxCNC) 

linuxcnc.org/docs/devel/html/man/man1/mesambccc.1.html
linuxcnc.org/docs/devel/html/man/man9/hm2_modbus.9.html

 
  • AdelRTP
  • AdelRTP
20 Jun 2025 19:39

Mesaflash 3.4.9 shows "Unsupported ethernet device 7I76EU" despite successful pi

Category: Driver Boards

thanks a lot Tommy,
i’m trying to control two servo drives (Modbus RTU) with a Mesa 7i76EU in LinuxCNC, but I can’t use Classic Ladder or PktUART
  • tommylight
  • tommylight's Avatar
20 Jun 2025 15:57
  • AdelRTP
  • AdelRTP
20 Jun 2025 15:04

Mesaflash 3.4.9 shows "Unsupported ethernet device 7I76EU" despite successful pi

Category: Driver Boards

Using 
mesaflash 3.4.9
 with a Mesa 7i76EU (IP 
192.168.1.121
). Ping works, but:mesaflash --device 7i76eu --addr 192.168.1.121 --readhmid
Unsupported ethernet device 7I76EU at 192.168.1.121
No 7I96S board found
Also tried with IP 
10.10.10.10
 after moving jumper W14 up
mesaflash --device 7i76eu --addr 10.10.10.10 --readhmid
Unsupported ethernet device 7I76EU at 10.10.10.10
No 7I96S board found
Is the 7i76EU supported? How to fix "Unsupported device"? 
  • knipknap
  • knipknap
20 Jun 2025 11:09
Replied by knipknap on topic MESA 7i76E burning out issue

MESA 7i76E burning out issue

Category: Driver Boards

I finally found the real cause.

Today i got the amplifier fault on another joint (joint 0) and I found that it the problem happened whenever I turned on the spindle.

After several attempts to measure the ground connections the machine stopped in a position where I found the machine frame was not grounded.

The reason: The spindle connector got loose. The machine frame was grounded through the spindle cable, and that cable had become loose.

All I had to do was tighten the screw of the connector. Ground connection works reliably again and the machine runs well. Phew.
  • bcorley
  • bcorley
19 Jun 2025 16:49

Laser Head Height Sensor – Looking for a Beta Tester

Category: Plasma & Laser

So, has there been any progress on getting this sensor to market? 

I'm trying to get a laser machine built, but, this is one of the toughest issues I'm facing.  I have a MESA 7i76EU that I have been trying to interface a BCL-AMP output to.  I have the BCL-AMP connected to a Raytools BT210S002A cutting head sitting on the bench with a chunk of steel in front of it and grounded to the case of the Raytools cutting head.  Between the BCL-AMP and the 7i76EU, I have a TI SN74HCS74DR dual Schmidt Trigger Flip Flop that I'm using to divide the BCL-AMP output frequency by 2 and "clean it up" at the same time.  However, it's just not very stable.  The velocity measured by the 7i76EU jumps around about 600-700 hz.  The velocity range only seems to be around 6500 hz from 0-10mm (3/8") sensing distance, so, my positional sensitivity sucks at around 0.1 inches.  Just for giggles, I ran the signal through 4 Flip Flops to see if the 'jumping around' would decrease.  It didn't.  Which leads me to believe the instability is introduced somewhere in my circuitry or wiring.  I even tried connecting Q and Q not outputs into the MESA card as differential signals and twisted the wires.  No help.

Anyhow, This CV2 height sensing device sounds very promising.  
  • directandrew
  • directandrew
16 Jun 2025 00:34

New to linuxcnc, basic question for DRO modes with encoded handwheels

Category: General LinuxCNC Questions

Based on what im reading, it does seem ill need a larger card to handle all the limit switches and 3 encoders, one for each hand-wheel. I will prob go RJ45 as the parallel ports are less and less these days.

Thinking this guy, not cheap but one stop shop correct?
store.mesanet.com/index.php?route=produc...id=399&search=7I76EU
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