ProSoft Technology MVI46-103M - Manual (Page 23)

Functional Overview MVI46-103M ♦ SLC Platform
IEC 60870-5-103 Master Communication Module
ProSoft Technology, Inc. Page 23 of 187
September 12, 2006
Block Format for Read
Word Offset in
Block Data Field(s) Description
4200 Block ID This field contains the block identification code of 9903 for the
block.
4201 Event Count This field contains the number of events present in the block.
Values of 1 to 20 are valid.
4202-4211 Event 1 Event message
4212-4221 Event 2 Event message
4222-4231 Event 3 Event message
4232-4241 Event 4 Event message
4242-4251 Event 5 Event message
4252-4261 Event 6 Event message
4262-4271 Event 7 Event message
4272-4281 Event 8 Event message
4282-4291 Event 9 Event message
The format of each 10-word data region in the block is as follows:
Word Offset Definitions Description
0 Session Index/Sector
Index This field contains the session and sector indices
used to define the controlled unit in the module from
which the event was generated. The MSB contains
the session index and the LSB contains the sector
index.
1 ASDU Type This field contains the ASDU type code for the data
contained in the message.
2 Function Code/Point
Index* This field contains the function code and the point
index associated with the event message. The MSB
contains the function code and the LSB contains the
point index.
3 Fault Number This is the fault number for the event if applicable.
Only valid for ASDU types 2 and 4.
4 Sec/mSec This word contains the seconds and millisecond
values with a range of 0 to 59999 time at which the
message was generated by the slave device.
5 Hr/Min. This word contains the hour and minutes the
message was generated by the slave. The MSB
contains the hour and the LSB contains the minute
value.
6 Invalid/DST This word contains two bits that relate to the time
value recorded in the slave device for the message.
Bit 0 corresponds to the validity of the time (0=valid,
1=invalid) and Bit 1 defines if daylight savings time is
used in the time (0=no, 1=yes).
7 Relative Time This field contains the relative time value if
applicable to the object. Only valid for ASDU types 2
and 4.