Which is the exact RS485 data format used for a TMC module?

TMC modules use the standard 8N1 bit format with a default telegram pause time of zero. The communication uses a Master-Slave pattern. So a PC/MCU (Master) sends a 9 Byte request command and the module (Slave) answers with a 9 Byte reply command. Afterward, the Master can send the next command.

=> MSB or LSB?
For a first try, please use the TMCL-IDE ( https://www.trinamic.com/support/software/). There you can connect e.g. with a USB-to-RS485 adapter with the module and try all available commands in the "Direct mode". Thereby, a command history mode is available to see which commands  are sent


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