Siemens SIPROTEC 7ST61 - Single Command (SC, Output)

Data type definitions
47
SIPROTEC PROFIBUS-DP - Communication profile
C53000-L1840-B001-03
3.2 Single command (SC, Output)
Number of
byte-values
1
/
4
(2 bits)
Range of values 0 (bit 1 = 0 and bit 0 = 0) - Quiescent status
1 (bit 1 = 0 and bit 0 = 1) - OFF
2 (bit 1 = 1 and bit 0 = 0) - ON
3 (bit 1 = 1 and bit 0 = 1) - not permissible
Figure 3-2 Data type: Single command
Note:
• Single commands of the SIPROTEC device are controlled via PROFIBUS-DP by
two bits (equivalent to double commands, ref. to chap. 2.2.1).
• The switching direction OFF for single commands with pulse output is not permitted
and is rejected in the SIPROTEC device.
Bit 1
SC 1SC 2
max. 4 SC per octet/byte
2
0
2
1
2
2
2
7
...2
4
Message head ... ... Message end
Bit 0 Bit 1 Bit 0...
2
3