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| Search found 11 matches |
| Author | Message |
|---|---|
 Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
 Forum: General CCS C Discussion Posted: Fri Aug 27, 2021 11:18 am Subject: RS485 Modbus |
| Indeed. That's why I suggest replacing the demos initialization with your own as I show in the fix. (Delete the use with pc and use only what I needed). I saw different topics with this problem but wi ... | |
| Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
Forum: General CCS C Discussion Posted: Fri Aug 27, 2021 9:31 am Subject: RS485 Modbus |
| You are missing the point.
The RX signal has to go _both_ to INT_EXT, and the receive pin. The INT_EXT is used to 'trigger' the start of the receive, but the data still has to actually be received ... |
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| Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
Forum: General CCS C Discussion Posted: Thu Aug 26, 2021 2:57 pm Subject: RS485 Modbus |
| As I have already pointed oot in another thread, 'USE_WITH_PC' means
the modbus will be setup to use INT_EXT to trigger the receive, not INT_RX. I already try that. I used INT_EXT and INT_RDA ... |
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| Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
Forum: General CCS C Discussion Posted: Tue Aug 24, 2021 12:53 pm Subject: RS485 Modbus |
| Seeing the adapters you are using, I assume the PIC side would be handled well by the library which will switch TX/RX direction as needed by the code.
On the Python side, you would always be in rec ... |
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| Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
Forum: General CCS C Discussion Posted: Tue Aug 24, 2021 9:00 am Subject: RS485 Modbus |
| You are selecting USE_WITH_PC. This is designed for when the PIC
system is being attached via RS232 to a PC, and it then has to handle the RS485, using INT_EXT, not the UART. Is this what you are d ... |
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| Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
Forum: General CCS C Discussion Posted: Tue Aug 24, 2021 8:15 am Subject: RS485 Modbus |
| re: ...I have a RS482 to usb adapter and a HW-97 RS482 for the pic
I have to ask HOW do the adapters control the direction of RS-485 data ? BTW I didn't find HW-97 to be an adapter...seems to b ... |
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| Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
Forum: General CCS C Discussion Posted: Tue Aug 24, 2021 7:25 am Subject: RS485 Modbus |
| I have a RS482 to usb adapter and a HW-97 RS482 for the pic. Whit that I can convert normal serial communication to rs485. That works ok. Now I want to implement Modbus on that communication.
Since ... |
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| Topic: RS485 Modbus |
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| Warday Replies: 17 Views: 55251 |
Forum: General CCS C Discussion Posted: Mon Aug 23, 2021 1:59 pm Subject: RS485 Modbus |
| Hi, I’m trying a simple Modbus communication using RS485. I have already used RS485 to communicate thru serial without problem. Now I want to implement Modbus protocol. I only required to read and e ... | |
| Topic: qei configuration to solve overflow encoder |
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| Warday Replies: 5 Views: 17483 |
Forum: General CCS C Discussion Posted: Tue May 25, 2021 12:55 pm Subject: qei configuration to solve overflow encoder |
| Thanks Ttelmah it works!!!
with QEIval.whole don't you mean QEIval.total? QEIval.whole give me error Thank temtronic. As it is a test version i have not yet applied your advice. I will apply it o ... |
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| Topic: qei configuration to solve overflow encoder |
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| Warday Replies: 5 Views: 17483 |
Forum: General CCS C Discussion Posted: Sat May 22, 2021 12:18 pm Subject: qei configuration to solve overflow encoder |
| Thanx for the reply. I will modify the code and when it is done I will comment the result. Thanx!! | |
| Topic: qei configuration to solve overflow encoder |
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| Warday Replies: 5 Views: 17483 |
Forum: General CCS C Discussion Posted: Fri May 21, 2021 2:59 pm Subject: qei configuration to solve overflow encoder |
| Hi. I’m using an dsPIC30f4012 to control a motor on a robot. Unfortunately, my encoder doesn’t have index and I reach more than 2^16 on counter. I read on the documentation that in that cases is r ... | |
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