M HARISH Member M Join Date Aug 2020 Location hyderabad Posts 6 Aug 13, 2020 #1 Hello, i am connected l&t energy meter to PLC through RS485 in tia portal v15. i was reading values in plc. my problem is how to check crc 16 in plc tia portal. kindly support me any one konws the solution
Hello, i am connected l&t energy meter to PLC through RS485 in tia portal v15. i was reading values in plc. my problem is how to check crc 16 in plc tia portal. kindly support me any one konws the solution
baref00t25 Member B Join Date Feb 2006 Location Central Wisconsin Posts 177 Aug 13, 2020 #2 I don't believe you can examine the actual CRC of the MODBUS messages. Look up the help file on MB_MASTER in TIA Portal. You will get an error bit if there is an error, and Error code 8380 for a CRC error.
I don't believe you can examine the actual CRC of the MODBUS messages. Look up the help file on MB_MASTER in TIA Portal. You will get an error bit if there is an error, and Error code 8380 for a CRC error.
drbitboy Lifetime Supporting Member Join Date Dec 2019 Location Rochester, NY Posts 8,107 Aug 13, 2020 #3 https://ctlsys.com/support/how_to_compute_the_modbus_rtu_message_crc/ In case you do actually see the CRC.
https://ctlsys.com/support/how_to_compute_the_modbus_rtu_message_crc/ In case you do actually see the CRC.