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Data type definitions
3.3
Double-point indication (DP, Input) / Double command (DC, Output)
Number of
byte-values
Range of values
Message head ...
Figure 3-3 Data type: Double-point indication / Double command
48
1
/
(2 bits)
4
0 (bit 1 = 0 and bit 0 = 0) - "Not applicable" / Intermediate position for DP,
1 (bit 1 = 0 and bit 0 = 1) -
2 (bit 1 = 1 and bit 0 = 0) -
3 (bit 1 = 1 and bit 0 = 1) - Intermediate position for DP, not permissible for DC
Note:
• Depending on the type, selected in DIGSI, the values 0 and 3 for double-point indi-
cations have the following meaning:
• Type DP: 0 = "Not applicable", 3 = Intermediate position "00" or "11",
• Type DP_I: 0 = "Not applicable" or Interm. position "00", 3 = Interm. position "11".
• "Not applicable": Double-point indication is not configured (not assigned to a binary
input).
7
4
3
2
...2
2
...
Bit 1
DP/DC 2
max. 4 DP/DC per octet/byte
Attention!
The data type double command in this chapter presupposes that the associated
checkback indication is parameterized as a double-point indication.
A double command with a single-point indication as checkback indication or without
checkback indication is controlled via PROFIBUS-DP like a single command (ref. to
chap. 3.2), because the treatment of a double command via PROFIBUS-DP depends
on the type of the associated checkback indication.
Quiescent status for DC
OFF
ON
2
1
2
2
Bit 0
Bit 1
DP/DC 1
SIPROTEC PROFIBUS-DP - Communication profile
0
2
Bit 0
... Message end
C53000-L1840-B001-03
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