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| Search found 4 matches |
| Author | Message |
|---|---|
 Topic: Help with MODBUS and 485 |
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| mikavamp Replies: 7 Views: 8936 |
 Forum: General CCS C Discussion Posted: Wed Jan 08, 2014 12:25 am Subject: Help with MODBUS and 485 |
| Thanks for answering
Well, without the PIC I can't see any response (not even invalid bytes). ==>TX: 21 04 00 00 00 01 36 AA ==>TX: 21 04 00 00 00 01 36 AA If the PIC is connected but ... |
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| Topic: Help with MODBUS and 485 |
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| mikavamp Replies: 7 Views: 8936 |
Forum: General CCS C Discussion Posted: Tue Jan 07, 2014 11:36 am Subject: Help with MODBUS and 485 |
| I've changed the baud rate to 1200 and now I can see my full frame but right after the next poll I can see all those invalid bytes again.
Even if I received the valid frame the software returns an ... |
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| Topic: Help with MODBUS and 485 |
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| mikavamp Replies: 7 Views: 8936 |
Forum: General CCS C Discussion Posted: Tue Jan 07, 2014 10:12 am Subject: Help with MODBUS and 485 |
| Hi
Between A-B pins 120ohm resistor In A-680 ohm resistor to VCC and in B-680ohm resistor to 0V |
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| Topic: Help with MODBUS and 485 |
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| mikavamp Replies: 7 Views: 8936 |
Forum: General CCS C Discussion Posted: Tue Jan 07, 2014 9:34 am Subject: Help with MODBUS and 485 |
| Hello
I'm already working with Modbus on pic (PC as Master and PIC as Slave). The problem I have is that when i'm sending the response to the master it doesn't receive any valid frame, i mean i d ... |
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