ABB TCC300, User Manual, Page: 682 / 716

Challenge Response Timeout
The range is from 0-100 seconds. This is the response time within which the control is
expecting a response to a challenge.
Duration of Session Key
This duration must be configured in minutes (0-100) and in count 0-65535. This duration
represents the maximum time or the maximum number of challenges a particular session
key is used before key negotiation is again performed.
Aggressive Mode
Full challenge/response exchanges increase the number messages in the protocol, which
affects throughput performance. Therefore, DNP Secure Authentication provides an
aggressive mode in which the data from a single challenge can be used to authenticate
many subsequent messages. The sender of the critical message includes the HMAC at the
end of the critical message without having to be challenged. At least one challenge must
occur, however, before aggressive mode can be used.
Critical Request Function Codes
This represents the function codes that will require authentication if selected. If none is
selected, authentication will not be performed on any function code although
authentication has been enabled.
Example of DNP Configuration Editor Use
The following sequence of steps provides an example of utilizing the DNP Configuration
Editor.
1. From the TCC600® Main Screen select Utility/DNP Configuration Editor .
TCC600 will display the DNP Configuration Editor dialog screen.
Section 12
1VAC388793-MB A
Appendix C DNP Configuration Editor
676 TCC300
User Manual