82 Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
Chapter 6 Micro870 Controller Distributed Network Protocol
Hold Time after Class1 Events (x 1s)
This parameter is only for a Class 1 Unsolicited Response. The controller holds the events
during Hold Time after Class1 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 Class1 Events and Hold Time after Class1 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.
Number of Class2 Events
If the controller is configured not to initiate Class 2 Unsolicited Responses, this parameter is
used to limit the maximum number of events, which is generated and logged into the event
buffer for Class 2 events. In this case, value 0 disables Class 2 event generation.
If the controller is configured to generate Unsolicited Responses, and the number of queued
Class 2 events reaches this value, an Unsolicited Response is initiated.
The valid range is 0…10000. Default value is 10.
See DNP3 10K Event Logging
on page 110 for more information
Hold Time after Class2 Events (x 1s)
This parameter is only for a Class 2 Unsolicited Response. The controller holds the events
during Hold Time after Class2 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 Class2 Events and Hold Time after Class2 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.
Number of Class3 Events
If the controller is configured not to initiate Class 3 Unsolicited Responses, this parameter is
used to limit the maximum number of events, which is generated and logged into the event
buffer for Class 3 events. In this case, value 0 disables Class 3 event generation.
If the controller is configured to generate Unsolicited Responses, and the number of queued
Class 3 events reaches this value, an Unsolicited Response is initiated.
The valid range is 0…10000. Default value is 10.
See DNP3 10K Event Logging
on page 110 for more information.
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