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| Search found 8 matches |
| Author | Message |
|---|---|
 Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
 Forum: General CCS C Discussion Posted: Sun Mar 11, 2018 2:52 pm Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| Thanks Ttelmah, I do have a scope and logic analyzer. That's how I found out what it was doing. I have modified my program a few times since Friday. So far my test program is still running 24 hours a ... | |
| Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
Forum: General CCS C Discussion Posted: Fri Mar 09, 2018 7:28 pm Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| Believe it or not it's working correctly now. Even using RS485. It looks like the issue is there has to be two stop bits in the #use statement even though it signifies the parity as 'None'.
#use ... |
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| Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
Forum: General CCS C Discussion Posted: Fri Mar 09, 2018 2:43 pm Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| note...The normal protocol for the serial port on the PLC is 9600,8,N,1. Using this I get no return however if I change the PLC to 9600,8,E,1 it then starts communicating except all I get is an except ... | |
| Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
Forum: General CCS C Discussion Posted: Fri Mar 09, 2018 2:31 pm Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| Well..What I am trying to do is have a PLC communicate with my interface board. I have no control over how data is sent from the PLC other than setting up the port settings. I have been using this par ... | |
| Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
Forum: General CCS C Discussion Posted: Fri Mar 09, 2018 1:51 pm Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| The gap between the bytes is the only thing I see different.
This is a new PIC I started working with on the Microchip Explorer 1632 board so I believe it is a hardware UART. I am using the serial i ... |
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| Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
Forum: General CCS C Discussion Posted: Fri Mar 09, 2018 1:15 pm Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| Thanks Ttelmah.. My bad.. I changed over to a MAX3232EEUE+ a few months back which is a 3.3 to 5 volt chip. I am running it at 3.3 volts. I can simulate the exact same procedure with the exact same s ... | |
| Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
Forum: General CCS C Discussion Posted: Fri Mar 09, 2018 1:00 pm Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| Thanks PCM programmer.. I know what the problem is I am just stumped on how to adjust it. Using the data analyzer with the USB the gap between received bytes in a frame is 0.2083ms which works great. ... | |
| Topic: Modbus comm problem with a PIC24FJ1024GB610 |
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| JMH Replies: 13 Views: 26854 |
Forum: General CCS C Discussion Posted: Fri Mar 09, 2018 11:23 am Subject: Modbus comm problem with a PIC24FJ1024GB610 |
| Hey guys I am new to this forum. I am kind of old school compared to you guys. Back in the day I developed many projects using the PIC16C series. All in assembly. I am semi retired now and trying to g ... | |
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