Data type definitions
54
SIPROTEC PROFIBUS-DP - Communication profile
C53000-L1840-B001-03
3.9 Message block for event list via PROFIBUS-DP
Number of
byte-values
10
The complex data type "Message block" defines an entry in the event list via PROFI-
BUS-DP and contains an identification for the annunciation in the event list including
the associated time stamp information.
Further information regarding the properties as well as the retrieval methods of the
event list via PROFIBUS-DP can be found in chapter 2.5.
Figure 3-9 Data type: Message block for event list via PROFIBUS-DP
Byte 1:
Identification
The identification byte identifies a single-point/double-point indication by means of the
set position "Byte offset" and "Bit mask" (ref. to chap. 4.2 "Customization of the
allocations") for the cyclic data exchange.
Instead of the "Bit mask" the bit position (0 to7) is set in the identification byte, in the
event of double-point alarms the least significant bit position in the byte.
For this purpose, the lower 3 bits of the identification byte define the bit position
(0 to 7) and the remaining higher order bits define the byte offset (0 to max. 31).
Message head...
...Message end
Byte 3 (MSB) Byte 4 (LSB)
Milliseconds (0 ... 59999)
Byte 5 Byte 6
Hours (0 ... 23) Minutes (0 ... 59)
Byte 7 Byte 8
Month (1 = Jan. ...12 = Dec.) Day (1 ... 31)
Byte 9 Byte 10
Clock status Year (0 = 1900)
Byte 1 Byte 2
Identification Value
Time stamp
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