B&R BRCOMP1-0 Anwenderhandbuch Seite 209

Status Register
The status register delivers information about the status of the serial interface and about possible errors.
The status of the status register must be checked for every send or receive procedure.
Status register
7
DS TR RF OV FE PE
P 101 / P 301
Data Register
The data register has two different functions:
- Frames to be received are read from the data register
- Frames to be sent are written to the data register
Data register
7
DATA
P 100 / P 300
DS DSR Line Status
TR Transmit ready
0
RF Receive frame
OV Overrun error
FE Framing error
PE Parity error
0
DATA Data to be sent or received
B&R COMPACT PLC
0 ... DSR low - Other station ready
1 ... DSR high - Other station not ready
0 ... Transmitter sends frame (character)
1 ... Send register empty. Sender ready
to send a frame
0 ... No frame (character) received
1 ... Frame received
0 ... No error
1 ... Error. The receiver was not properly read
before a new frame (character) was
received
0 ... No error
1 ... Error. Stopbit not recognized.
0 ... No error
1 ... Parity test error
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