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  • AdelRTP
  • AdelRTP
21 Jun 2025 16:58
Replied by AdelRTP on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

I dont understand what is hm2_modbus new firmware ?
How to use it, what i should do ?
in mesa modbus i just find this
PktUART
MB2HAL
vfdmod
Classic Ladder
i want to use Classic ladder but i dont know how
  • PCW
  • PCW's Avatar
21 Jun 2025 16:34

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

The original modbus driver only supports one device per interface
(its basically for VFD spindles or just single devices)

For multiple devices, use hm2_modbus

man hm2_modbus

man mesambccc
 
  • AdelRTP
  • AdelRTP
21 Jun 2025 15:37
Replied by AdelRTP on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

At the end those two adresses are not readable and i change them according the the mitsubishi datasheet with two other adresses and it works thank you so much for your help
i have one last question please now i want to read data from different slaves (3 servo dirvers) how can i do that , i've tried to add a second device initialization on the hal file and i created a new comp file but the problem is one of them connect and the second slave doesn't respond
  • 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"? 
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