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X20CM4800X - Data sheet V1.04

Name:

TxByte1 to TxByteN

RxByte1 to RxByteN

(The value the number N is different depending on the bus controller model used.)

The Tx and Rx bytes are cyclic registers used to transport the payload data and the necessary control bytes. The number of active Tx and Rx bytes is taken from the configuration of registers OutputMTU and InputMTU, respectively.

In the user program, only the Tx and Rx bytes from the CPU can be used. The corresponding counterparts are located in the module and are not accessible to the user. For this reason, the names were chosen from the point of view of the CPU.

•"T" - "Transmit" →CPU transmits data to the module.

•"R" - "Receive" →CPU receives data from the module.