Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 83
Chapter 6 Micro870 Controller Distributed Network Protocol
Hold Time after Class3 Events (x 1s)
This parameter is only for a Class 3 Unsolicited Response. The controller holds the events
during Hold Time after Class3 Events (x 1s) before initiating an Unsolicited Response.
The valid range is 0…65535. Default value is 5.
The value of 0 indicates that responses are not delayed due to this parameter.
The parameters Number of Class3 Events and Hold Time after Class3 Events (x 1s) are used
together so that if either one of the criteria are met, an Unsolicited Response is transmitted.
By default, the Hold time is re-triggered for each new event detected.
Select Timeout (x 1s)
The valid range is 1…65535. Default value is 10.
This parameter is used for controlling CROB (Control Relay Output Block) and AOB (Analog
Output Block). After receiving the request with the function code FC_SELECT(3), DNP3 Master
should send the request with the function code FC_OPERATE(4) within this configured time.
DNP3 Object Data and Config
The DNP3 Mapping selection under DNP3 Slave in the controller properties allow you to define
the mapping of the listed DNP3 object and object properties (class number, online/offline
status, object quality flags, deadbands, and/or thresholds) to controller variables.
See DNP3 Objects and Controller Variables
on page 96 for more information.
DNP3 Secure Authentication
The controller implements the DNP3 Secure Authentication based on the DNP3 Specification,
Supplement to Volume 2, Secure Authentication,
Version 2.00 and 5.00.
DNP3 Secure Authentication has been implemented in the DNP3 Application Layer of the
controller system. If you configure any parameters regarding DNP3 Secure Authentication in
the DNP3 Slave Application Layer configuration, it affects all ports which are configured for
DNP3 protocol in the controller.
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