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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 
 
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