
Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
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Chapter 6 Micro870 Controller Distributed Network Protocol
Enable Time Synchronization
Valid selections are Enabled (Checked) and Disabled (Unchecked). Default value is Disabled
(Unchecked).
This parameter used with Time Synchronization Interval (x1 mins).
When the selection is Disabled (Unchecked), the controller does not perform any time
synchronization.
When the selection is Enabled (Checked), the controller sets the NEED_TIME Internal Indication
bit (IIN1.4) on power up and every interval configured in Time Synchronization Interval (x1
mins).
Time Synchronization Interval (x1 mins)
This parameter is used with Enable Time Synchronization. Only valid when Enable Time
Synchronization is Enabled (Checked).
The valid range is 0…32767. Default value is 0. If the value is 0, the NEED_TIME Internal
Indication (IIN1.4) bit are set at startup and then after every Time Synchronization Interval
minutes if the value is greater than 0.
When the parameter Enable Time Synchronization is Disabled (Unchecked), the IIN1.4 bit is
never turned on.
Max Response Size
The controller sends Application Layer frame to fit in Max Response Size. If the Response
packet size is larger than this value, the controller fragments the Response packet.
The valid range is 27…2048 in bytes. Default value is 2048.
Confirmation Timeout (x1 ms)
When Enable Confirmation is enabled, the controller waits for Application Layer Confirmation
until the Confirmation Timeout (x1 ms) has expired.
The valid range is 100…65535 in 1 ms increments. Default value is 10000.
Number of Retries
This parameter is only for Unsolicited Response. If this value has the maximum which is
65535, it means infinite retries of the Unsolicited Response.
The valid range is 0…65535. Default value is 0.
Number of Class1 Events
If the controller is configured not to initiate Class 1 Unsolicited Responses, this parameter is
used to limit the maximum number of events, which is generated and logged into the event
buffer for Class 1 events. In this case, value 0 disables Class 1 event generation.
If the controller is configured to generate Unsolicited Responses, and the number of queued
Class 1 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.