4.1.4 PLCTxTask

The PLCTxTask waits for the mailbox message of SEND_PLC_DATA. If the task receives the mailbox message, it sends the data over UART to the PLC C2000 device for PLC transmissions and then copies the data into PLC_HoldQueue to handle re-transmissions. When re-transmission happens, the task sends the data in the PLC_HoldQueue through UART.