The Sinaut 8FW protocol was the standard protocol used by Siemens for
coupling controls stations and substations before being replaced by IEC 60870-5-101. There are several variants of this protocol in use:
- Sinaut 8FW PDM
for physical layer encoding based on the PLM method
(Pulse Length Modulation)
- Sinaut 8FW PCM
for physical layer encoding based on the PCM method
(Pulse Code Modulation) with start bit, data bits, parity and stop bit. This
protocol variant used the FT1.2 telegram format standardized in the IEC TC57 (IEC 60870-5-1)
- Sinaut 8FW DUST
follows the 3964R procedure on the physical layer mainly used in process
Sinaut 8FW PLM can be operated at baud rates of up to 1200 Baud, it only supports point-to-point operation.
Sinaut 8FW PCM is mainly used in point-to-point operation. But there are also
variants suitable for party-line operation.
In addition to those basic variants already mentioned, there are other
versions which differ in their functional scope and telegram length.
This is why the range of functions needs to be specified in each case.