3/24/2019 12:56 AM | |
Joined: 4/4/2016 Last visit: 1/14/2020 Posts: 52 Rating: (1) |
Now the same issue but for modbus / TCP. .... I have mapped the parameter On Time and on the node-red side using modbus node i can write and read VMs , the value changes but the format does not match the BCD time format ? Any possible explanation ? Regards, MD ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 3/25/2019 10:09:33 AMNew subject after splitting |
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3/24/2019 10:11 PM | |
Joined: 4/4/2016 Last visit: 1/14/2020 Posts: 52 Rating: (1) |
Hi Scorp, In attachment a summary about raw data and a short description of my steps. I thought i would get the same decimal value 4660 corresponding to time 12:34. Why the values are different in Modbus / TCP ? Regards, MD AttachmentModbus TCP V1.pdf (371 Downloads) |
3/25/2019 6:16 AM | |
Joined: 2/22/2008 Last visit: 8/6/2024 Posts: 2698 Rating: (207) |
The problem seems to be the wrong byte order or endianness, you need big-endian and node-red use the little-endian format. Try to find settings for these formats in Modbus node-red and how to change them. Read this for more information of the byte order. Regards, Scorp |
3/25/2019 10:10 AM | |
Joined: 4/4/2016 Last visit: 1/14/2020 Posts: 52 Rating: (1) |
Data table Fig.5 shows values on Words VW 100 , VW 101 , VW 102 , VW 103 . I´ve only mapped the VW 101. Where the other values come from ? I have used a PLC instead of node-red to read values ihn LOGO the values i have received were the same as in node-red Fig -4 . This values are generated by LOGO , right ? Is this a LOGO bug ? Regards, MD AttachmentModbus TCP V1.pdf (356 Downloads) |
3/25/2019 10:12 AM | |
Joined: 4/4/2016 Last visit: 1/14/2020 Posts: 52 Rating: (1) |
Data table Fig.5 shows values on Words VW 100 , VW 101 , VW 102 , VW 103 . I´ve only mapped the VW 101. Where the other values come from ? I have used a PLC instead of node-red to read values in LOGO . The values i have received in PLC were the same as in node-red Fig -4 . This values are generated by LOGO , right ? Is this a LOGO bug ? Regards AttachmentModbus TCP V1.pdf (369 Downloads) |
Last edited by: AutoGen_5957274 at: 3/25/2019 10:12:55 AM |
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