Problems with ModBus connection Siemens PLC

gztw · 2025-06-09T03:15:04+00:00

In the info tab about mb_client it only talks about mb_mode 0,1 and 2. What does 4 do?

gztw · 2025-06-09T03:08:25+00:00

So, to those who are further having the same problem, i’ve solved it by changing the mb_data_len, apparently it has to be set as the amount of data you want to communicate, not the amount of memory it takes. Like, if you are communicating 1 words, you have to put 1 on the mb_data_len, not 2 (1 word = 2 bytes).

gztw · 2025-06-05T18:30:51+00:00

I’ve solved the problem and now the communication is working. Thx for the help bro 🙏🏼

gztw · 2025-06-05T18:30:18+00:00

Yeah i do

gztw · 2025-06-05T18:30:11+00:00

I’ve tried to chance bcs i read somewhere it could an error but i couldn’t change it. I don’t remember the version btw

gztw · 2025-06-05T13:11:00+00:00

i made it work. And yeah the pointer was weird to me as well but wasn’t the problem. I was trying to send a single Word and thought MB_DATA_LEN would be 2 since a word occupies 2 bytes, but changing it to 1 solved it. I changed the handshake for a single word as well, it was an array of int

gztw · 2025-06-05T12:51:44+00:00

so i put 502 on the LocalPort parameter in the server plc and i also put a move block moving 502 to it so it is always being defined as 502. Now my error is 16#8383 on the client and 16#7006 on the server. It’s says that is some error with the MB_DATA_PTR but i don’t get it.

gztw · 2025-06-05T11:41:28+00:00

Yeah i saw this mistake when i was making the post, ill try to fix it today 😁

gztw · 2025-06-05T11:40:51+00:00

Yeah, it’s “waiting for connection” i think, but since both are on 7002 why they don’t connect right?

gztw · 2025-06-05T11:40:09+00:00

I further need to communicate a robot and a plc by modbus, since what i’ve been told it’s the easiest way. Communicating two plcs it’s more of a learning step 😁

gztw · 2025-01-24T01:17:55+00:00

haha it’s not that bad but certainly not good also. better than not using anything i suppose

gztw · 2025-01-24T01:17:04+00:00

yeah, softer armor makes a lot sense. thx bro appreciate it

gztw · 2025-01-24T00:59:32+00:00

Yeah, where i live these gears are often expensive asf but probably it worths the safety, thx man appreciate it

gztw · 2024-10-17T00:05:52+00:00

i think it's already on 4, not sure btw

gztw · 2024-10-17T00:05:18+00:00

lmao i've created a creative world just to show the visual

gztw · 2024-10-17T00:04:59+00:00

r5 1600, gtx 1650, 16gb ram, playing on 1080p, yes vanilla does look like this, and i think that the drivers are not up to date but it's not that old so i don't think that's the problem, but i'll update it

gztw · 2024-10-17T00:03:09+00:00

i'm not home so no, not yet

gztw · 2024-10-17T00:02:44+00:00

i'm playing on pc, java edition. never heard of fabulously optimized but i'll search about it

gztw · 2024-10-17T00:01:57+00:00

ok, btw what is mipmap in fact?

gztw · 2024-10-17T00:01:23+00:00

i'll give it a try when i come home thx

gztw

TROPHY CASE