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+--- Thread: FC21 (/showthread.php?tid=4846)
FC21 - Erwin van der Zwart - 27.06.2023
Do we support Modbus function code 21 (Write File Record)?
RE: FC21 - admin - 27.06.2023
It's not supported directly but there are send/receive functions for raw payloads.
RE: FC21 - Erwin van der Zwart - 27.06.2023
Is there a sample of how to use it with raw data?
RE: FC21 - admin - 27.06.2023
It simply sends whatever data you want to the port. CRC16 is added automatically. Data must be supplied as a string.
This script uses it: https://forum.logicmachine.net/showthread.php?tid=4288