Rockwell Automation Publication 1766-UM001O-EN-P - September 2021 255
Appendix F MicroLogix 1400 Distributed Network Protocol
These two timers are synchronized by the following conditions:
•power up
• a request for time synchronization from DNP3 Master.
At power up, the DNP3 subsystem gets the time from an RTC function file in
the controller. For the RTC function file to acquire the correct time, the RTC
module should be enabled before a power cycle to acquire the correct time
from the RTC function file.
In this example RTC function file, the RTC module is disabled. To enable it,
click Set Date & Time while it is online.
When there is a write request for time synchronization from a DNP3 Master,
DNP3 subsystem synchronizes its timer with the time from DNP3 Master and
the time in RTC module is synchronized with the time from DNP3 Master.
This table shows RTC Accuracy. Configure the NEED_TIME IIN bit according
to this table, so that a DNP3 Master can send the time synchronization request
for more accurate times in the controller.
Download a User Program
via DNP3 Network
Using File-Control/Status of Requested Operation objects, a user program can
be downloaded/uploaded/initialized via DNP3 communication. Also, Serial
Channel 0 Status File, Ethernet Channel 1 Status File, and Serial Channel 2
Status File can be uploaded from the controller.
All File-Control/Status of Requested Operation objects and supported File-
Control/Status of Requested Operation objects are listed in this section.
Unsolicited Response for File-Control/Status of Requested Operation objects
is not supported. All the responses are sent to DNP3 Master with Function
Code 129 (81h).
• g70v1 File-Control – File identifier: superseded, not supported
• g70v2 File-Control – Authentication: supported
• g70v3 File-Control – File command: supported
• g70v4 File-Control – File command status: supported
• g70v5 File-Control – File transport: supported
RTC Accuracy
Ambient Temperature
RTC Accuracy
(1)
(1) These numbers are maximum worst case values over a 31-day month.
0 °C (32 °F) -13...-121 seconds/month
25 °C (77 °F) 54...-5 seconds/month
40 °C (104 °F) 29...-78 seconds/month
55 °C (131 °F) -43...-150 seconds/month
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