Micro 1200 Modbus Slave Error Question

Duwop

Member
Join Date
Sep 2007
Location
Alabama
Posts
37
I've got a Micro 1200 setup as a Modbus Slave on an MDS 9810 radio. I haven't had a communications drop that I've seen & no "kiss of death" errors, but when I'm online with the PLC I have noticed in the channel status file that sometimes I get a "Link Layer Error Code 5". I also have other PLC's programmed the same, & also on radios but no errors.?.?
Could someone enlighten me as to what this code is?
I did see something in an AB Manual about "Bad parameter".
Is this correct & if so why aren't the other PLC's showing this as well? (That last one may be a stupid question but there it is anyway.)

As always, THANKS for any & all help.
 
Slave Driver Link Layer Error Codes
Error Descriptions







0




no error 0
1​








no receive buffer available 1



packet too short (< 4 bytes long)2











packet too long (> buffer size)3








UART error (framing, overrun or parity)4







bad CRC 5








CTS timeout (CTS not high within 1 second after RTS high)6








CTS dropped in the middle of transmission (errors 8-13 are Modbus RTU Master only)7








zero data in reply packet 8








bad slave (slave is unable to execute the command) 9








function code mismatch between query and response 10








unsupported function code 11




comms watchdog timeout 13
Catalog Number: 1762L24AWA;1762-L24AWAR;1762L24BWA;1762-L24BWAR;1762L24BXB;1762-L24BXBR;1762L40AWA;1762-L40AWAR;1762L40BWA;1762-L40BWAR;1762L40BXB;1762-L40BXBR;1763-L16AWA;1763-L16BBB;1763-L16BWA;176424AWA;176424BWA;176428BXB;1764LRP;1764LSP;MicroLogix 1500
DocFullNum: Q168129349
CRC error , its trying to write somethin for some reason.


Hardware: The part of the computer that you can kick, Down The Stairs!

there is no 12 in the table for some reason
 
Last edited:
THANK YOU, THANK YOU, THANK YOU!
I been trying to find this info but to no avail.
I guess I could have opened my eyes a little more.

Hardware: .........,How about out the window?
 

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