...
** -
ASDU 17 and
38: the value of SEP byte sets the attributes FLA (0.bit), FLB (1.bit) up-to FLH (7.bit), following 2 bytes (CP16Time2a) are interpreted as a positive number (0-60 000) into the value of I/O tag with value type Ci/Ai or as a relative time (0-60 seconds) into the value of I/O tag with
TiR value type
TiR.
*** -
ASDU 18,
39 and
40: value of SPE(ASDU 18,39) or OCI (ASDU 40) byte sets the attributes FLI (0.bit), FLJ (1.bit) up-to FLP (7.bit). The value of byte QDP sets the attributes FLA (0.bit), FLB (1.bit) up-to FLH (7.bit), following 2 bytes (CP16Time2a) are interpreted as a positive number (0-60 000) into the value of I/O tag with value type Ci/Ai or as a relative time (0-60 seconds) into the value of I/O tag with
TiR value type
TiR.
Note 2: When using the system and line redundant categories of lines, the status of line and station is formed by a logical sum of all used lines. It means, that if the redundant system consists of four lines and just one line is working, the status of the station and line is all right. The status of lines is presented with the help of special input or output I/O tag (of integer and real type, i.e. Ai/Ao/Ci/Co). The name of this I/O tag has this format: [line_name]_SystemStatus (e.g. for line L.Test it is M.Test_SystemStatus). The value of the I/O tag represents the binary format of the status of N-tuple lines. If the first three lines are okay but the last one does not work (SystemB/SecondaryLine) i.e. [FALSE, TRUE, TRUE, TRUE], I/O tag has the value 0b0111, i.e. 7.
The order of lines mapped to individual bits is [SystemB/SecondaryLine, SystemB/PrimaryLine, SystemA/SecondaryLine, SystemA/PrimaryLine].
...
| Info |
|---|
|
You can read blogs about about the IEC 870-5-101 protocol (for now, in Slovak language only): |
...