5.9 Configurable statistic thresholds and statistic
information object addresses
Name Default value of statistic Configured value of statistic
threshold
Information object address
of the integrated total for
the statistic
Unexpected Messages 3 3 (Configurable) Configurable
Authorization Failures 5 5 (Configurable) Configurable
Authentication Failures 5 5 (Configurable) Configurable
Reply Timeouts 3 3 (configurable) Configurable
Rekeys Due to Authentication
Failure
3 3 (configurable) Configurable
Total Messages Sent 100 100 (Configurable) Configurable
Total Messages Received 100 100 (Configurable) Configurable
Critical Messages Sent 100 - Configurable
Critical Messages Received 100 100 (Configurable) Configurable
Discarded Messages 10 10 (Configurable) Configurable
Error Messages Sent 10 10 (Configurable) Configurable
Error Messages Rxed 10 10 (Configurable) Configurable
Successful Authentications 100 100 (Configurable) Configurable
Session Key Changes 10 10 (Configurable) Configurable
Failed Session Key Changes 5 5 (Configurable) Configurable
Update Key Changes 1 1 (Configurable) Configurable
Failed Update Key Changes 1 1 (Configurable) Configurable
Rekeys Due to Restarts 3 - Configurable
5.10 Critical functions
This table shows which functions are considered critical by the device as it is
presently configured. An “M” in the “M/O” column means it is mandatory to consider
this Type to be critical. An “O” means it is optional. A “-“ in the “Configured as
Critical” column means the type is not supported.
Table 17: Critical functions
Type identification Description IEC 60870-5-101 IEC
60870-5-104
M/O Configured as
critical (Y/N/-)
<1> M_SP_NA_1 Single-point information without
time tag
Yes Yes O N
<2> M_SP_TA_1 Single-point information with time
tag
Yes No O -
<3> M_DP_NA_1 Double-point information without
time tag
Yes Yes O N
<4> M_DP_TA_1 Double-point information with
time tag
Yes No O -
<5> M_ST_NA_1 Step position information Yes Yes O -
<6> M_ST_TA_1 Step position information with
time tag
Yes No O -
<7> M_BO_NA_1 Bitstring of 32 bits Yes Yes O -
Table continues on the next page
Secure authentication conformance
statement
2NGA001859 A
50 REX615
IEC 60870-5-104 Communication Protocol Manual
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