Status word
Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Name | IL7 | IL6 | IL5 | IL4 | IL3 | IL2 | IL1 | IL0 | - | OVERRUN ERR | FRAMING ERR | PARITY ERR | BUF_F | IA | RR | TA |
Key
Bit no. | Name | Description | |
|---|---|---|---|
15 ... 8 | IL7 ... IL0 | 1dec .. 22dec | The number of input bytes available for the transmission from the box to the controller. |
|
7 |
reserved | ||
|
6 |
OVERRUN ERR |
0 .. 1 |
An overrun error has occurred. The data concerned is not loaded to the receive FIFO of the box and is lost. |
|
5 |
FRAMING ERR |
0 .. 1 |
A framing error has occurred. The data concerned is not loaded to the receive FIFO of the box and is lost. |
|
4 |
PARITY ERR |
0 .. 1 |
A parity error has occurred. The data concerned is not loaded to the receive FIFO of the box and is lost. |
3 | BUF_F | 1 | The number of bytes in the receive buffer exceeds the value of parameter 8010:1A "Rx buffer full notification" (factory setting: 864 bytes). |
|
2 |
IA |
1 |
The initialization has been executed by the box. |
|
0 |
The box is ready again for serial data exchange. | ||
|
1 |
RR |
toggle |
Via a change of state of this bit the box notifies the controller that the DataIn bytes contain the number of bytes indicated via the IL bits. The controller has to acknowledge receipt of the data in the control byte via a change of state of bit CW.1 (RA). Only then can new data be transferred from the box to the controller. |
|
0 |
TA |
toggle |
The box acknowledges the receipt of data by changing the state of this bit. Only then can new data be transferred from the controller to the box. |