BECKHOFF KL6001 - Manual (Page 11)

Register description
KL6001 11
Terminal-specific register description
Process variables R0: Number of data bytes in the send FIFO
The number of data items in the send FIFO is in the low byte. The high
byte is not used.
R1: Number of data bytes in the receive FIFO
The low byte contains the number of data in the receive FIFO. The high
byte is not used.
R2 - R5: no function
R6: Diagnostic register
High byte: not used
Low byte: status of the receive channel (bits 0 – 7)
Bit No. Meaning
Bit 0 1 The receive buffer has overflown and arriving
data is lost.
Bit 1 1 Parity error has occurred.
Bit 2 1 Framing error has occurred.
Bit 3 1 Over run error has occurred.
Bit 4 1 Buffer is full
Bits 5 - 15 - not used, don't change
Manufacturer parameters
R18: Buffer size
[0x0080]
Register R18 defines the number of data items in the receive FIFO as from
which the BUF_F bit is set in the status byte.
Low byte: BUF_F is set in the status if this value is reached.
High byte: not used
User parameters R32: Baud rate:
[0x0006]
Bit No. Baud rate
Bit 2 Bit 1 Bit 0
0 1 1 1200 Baud
1 0 0 2400 Baud
1 0 1 4800 Baud
1 1 0 9600 Baud [1 1 0]
1 1 1 19200 Baud
Bits 3 - 15 - not used, don't change
The baud rate can also be set in accordance with the following equation:
Baud rate = 4 MHz/(16*(HB+1))
At the same time, 0xFF must be written into the low byte and the high byte
(HB) specifies the operator.