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  • PCW
  • PCW's Avatar
22 Jun 2025 13:27

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

2.10 or 2.9 will work but you need a recent build.
(newer than 1 month ago)


 
  • tommylight
  • tommylight's Avatar
22 Jun 2025 12:48
Replied by tommylight on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

Seems you would need 2.10 for it to work, see
buildbot.linuxcnc.org
but first try this
buildbot.linuxcnc.org/dists/buster/maste...fd6a133f8b_amd64.deb
download and install with gdebi
  • AdelRTP
  • AdelRTP
22 Jun 2025 10:50 - 22 Jun 2025 10:51
Replied by AdelRTP on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

I try man hm2_modbus, command not found as you see in attachment i have linuxcnc 2.9.4, i check in linuxcnc official site this is the last version, i dont know where is the problem 
  • AdelRTP
  • AdelRTP
22 Jun 2025 08:09
Replied by AdelRTP on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

I try man hm2_modbus
and man mesambccc
not exist in my linuxcnc i have the last version 2.9.4 i see in linuxcnc official site this is the last version, if there is newest version tell me please
 
  • PCW
  • PCW's Avatar
21 Jun 2025 22:25

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

The OP may need to update LinuxCNC to the latest 2.9.4 or 2.10

I'm not an expert in this as I usually use a built from source RIP installation
 
  • tommylight
  • tommylight's Avatar
21 Jun 2025 21:11
Replied by tommylight on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions


man hm2_modbus

man mesambccc

 

You forgot "man"
  • AdelRTP
  • AdelRTP
21 Jun 2025 19:21
Replied by AdelRTP on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

i have LINUXCNC - 2.9.4 the last version but where can i find man hm2_modbus, can you show me how to use hm2_modbus, mesambccc, give me examples please
I use mesambccc --help, it dos not exist
 
  • AdelRTP
  • AdelRTP
21 Jun 2025 18:42
Replied by AdelRTP on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

i have LINUXCNC - 2.9.4 the last version but where can i find man hm2_modbus, can you show me how to use hm2_modbus, mesambccc, give me examples please
  • PCW
  • PCW's Avatar
21 Jun 2025 18:03

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

hm2_modbus is an alternate modbus interface to Mesa FPGA cards with 
PKTUART firmware. It supports additional features such as multiple devices
per interface, one time initialization code etc etc.

You need to have the latest LinuxCNC to have hm2_modbus

if

man hm2_modbus

Gives you a manual page, you have a late enough version of LinuxCNC
to use hm2_modbus.

hm2_modbus will work with your existing firmware.

 
  • 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
 
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