Transmission Concept - Siemens SWT 3000 Equipment Manual

9.2

Transmission Concept

On the DLE, a data stream is generated at the transmit side from the protection commands, RM, SC, and the
system-internal control information. The data stream is sent with the periodic transmission of 4 message types
with constant length. The data stream is split up again at the receive side into protection commands, RM, SC,
and system-internal control information.
The messages have the following elements:
Priority 1 = Tripping command
information
Priority 2 = Service channel
Priority 3 = Remote mainte-
nance
Priority 4 = System-internal
control information
Table 9-1
Byte 1
Frame alignment signal
Frame alignment signal
Frame alignment signal
Frame alignment signal
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020
Type 3
Type 2
Type 1
Type 0
Composition of Messages
Byte 2
Type code 0
Type code 1
Type code 2
Type code 3
Byte 3 Byte 4
User data User data
RM data RM data
SC data SC data
Device address Command informa-
tion
Digital Line Equipment
9.2 Transmission Concept
Byte 5
User data
RM data
SC data
Checksum
333