88 Rockwell Automation Publication 2080-UM002M-EN-E - April 2022
Chapter 6 Micro870 Controller Distributed Network Protocol
When the selection is Enabled (Checked), the controller always sends
Response packets with the CON bit set in its header, which causes the DNP3
Master to send replies confirming that it received each Response packet
without error.
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.
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