Double-Point Indication (Dp, Input) / Double Command (Dc, Output); Measured Value (Signed Integer); Figure 5-3 Data Type Double-Point Indication / Double Command; Figure 5-4 Data Type Measured Value (Signed Integer) - Siemens SIPROTEC4 7SJ61 Manual
Multifunction protection with control; input/output unit with local control; multifunctional machine protection;
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5.3
Double-point indication (DP, Input) / Double command (DC, Output)
7
2
Message head...
Figure 5-3
Data type double-point indication / double command
5.4
Measured value (signed integer)
S
Message
head...
Figure 5-4
Data type measured value (signed integer)
Meaning of the status bits:
S
- Sign bit, active: negative measured value (two's complement)
7SJ61/62/63, 6MD63, 7UM61 PROFIBUS-DP – Communication profile
C53000-L1840-B001-02
Number of byte-values : ¼ (2 bits)
Range of values
0 (bit 1 = 0 and bit 0 = 0) - „Not applicable" for DP,
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) - Error status/Intermediate position for DP,
Note
•
„Not applicable": double-point indication is not configured (not
assigned to a binary input).
•
The value „11" ist transmitted for intermediate position „00" too.
4
3
2
...2
2
2
...
Bit 1
Bit 0
DP/DC 1
max. 4 DP/DC per octet/byte
Number of byte-values : 2
Range of values
Measured value
Byte 1
: 0 to 3
Quiescent status for DC
not permissible for DC
1
0
2
2
Bit 1
Bit 0
DP/DC 2
:
-32768 to +32767
(-32768 = "Overflow" or "Invalid")
Byte 0
Data type definitions
...Message end
...Message
end
5-3
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