401
2020/09
Process output data
TXBufNotEmpty 0-1 This bit signalizes that the transmit buffer still contains data.
It is automatically reset when the last character is sent.
The bit can be used as control bit for actively triggering the sending of
the TX data buffer.
BufOvfl; FrameErr; Hnd-
ShErr; HwFailure; PrmErr
0 - 255 Diagnostic information (correspond to the diagnostic information in
the diagnosis telegram).
These diagnostics are always displayed and independent to the setting
of the parameter „Diagnostics”.
Designation Value Description
STATRES 0-1 This bit is set to reset the STAT bit in the process input data.
With the change from 1 to 0 the STAT bit is reset (from 0 to 1).
If this bit is 0, all changes in TX_BYTE_CNT, TX_CNT and RX_CNT_ACK
are ignored. The clearing of the receive and transmit buffer by RXBUF
FLUSH/TXBUF FLUSH is possible.
The value 1 or the transition from 0 to 1 disables the clearing of the
receive and transmit buffer by the RXBUF FLUSH/TXBUF FLUSH.
RX_CNT_ACK 0-3 The value RX_CNT_ACK is a copy of the value RX_CNT. The value
RX_CNT was transferred together with the last data segment of the
process input data.
RX_CNT_ACK has to be set analog to RX_CNT (in the status byte).
RX_CNT_ACK is an acknowledge for the successful transmission of the
data segment with RX_CNT. New data can now be received.
TX_CNT 0-3 This value is transferred together with every data segment. The
TX_CNT values are sequential:
00->01->10->11->00…
(decimal: 0->1->2->3->0…)
Errors in this sequence show the loss of data segments.
TX_BYTE_CNT 0 - 7 Number of the valid bytes in this data segment.
TXBUF FLUSH 0-1 The TXBUF FLUSH bit is used for clearing the transmit buffer.
If STATRES = 1:
A request with TXBUF FLUSH = 1 will be ignored.
If STATRES = 0:
TXBUF FLUSH = 1 will clear the receive buffer.
RXBUF FLUSH 0 - 1 The RXBUF FLUSH bit is used for clearing the receive buffer.
If STATRES = 1:
A request with RXBUF FLUSH = 1 will be ignored.
If STATRES = 0:
RXBUF FLUSH = 1 will clear the receive buffer.
TXBufDis 0-1 Setting this bit deactivates the sending of the TX buffer.
The bit can be used as control bit for actively triggering the sending of
the TX data buffer.
Designation Value Description
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