Siemens 7SJ82, Manual

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Table 3-14 Available Bits - Minimum Constellation Baud Rate 512/2048 kbit/s
Priority 1 Priority 2 Priority 3
Type 1 48 bits 128 bits 384 bits
Type 2 96 bits 200 bits 1024 bits
Table 3-15 Requirement in Bits
Signal Type Size in Bits
SP (single-point indication) 1 bit
DP (double-point indication) 2 bits
IN (metered values) 32 bits
MW (measured values)
8
32 bits
ACT 4 bits
Table 3-16 Possible Dropout Values
Signal Type Dropout Values
SP (single-point indication) Outgoing, Incoming, Hold
DP (double-point indication) On, Off, Intermediate Position, Disturbed Position,
Hold
IN (metered values) 0, Hold
MW (measured values) 0, Hold
ACT Hold
i
i
NOTE
If the protection link fails, these values can be set on the receiver side.
EXAMPLE
2 devices are connected via a 64-kbits channel. This is a type 1 topology. 8 bits are freely available for priority
1. Now, for example, 4 SPS and 2 DPS can be routed:
4 x 1 bit + 2 x 2 bits = 8 bits
i i
NOTE
Measured values are transmitted as primary values.
EXAMPLE
For the rated current display in the receiving device
When I
rated
= 1000 A in the transmitting device and I
Load
= 200 A, the number 200 is displayed in the receiving
device.
Remote Data Transmission: Routing of the Indications and Measured Values to the Protection Interface
The transmission is organized in the form of a data bar which is continuously exchanged between the devices.
For this, see
Figure 3-57 .
A device indication or measured value is allocated to a definite data area of the bar.
8 The complex phasors of a measuring point are pre-routed
System Functions
3.5 Protection Communication
130 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017