Network Time Service Diagnostics
Original instructions
About us
Introduction
Use the Network Time Service Diagnostic page to display dynamically generated data describing the operation of the simple network time protocol (SNTP) service that you configured in the network time server page in Control Expert.
NOTE: Before you can open the diagnostics page, make the connection between the DTM for the target communication module and the physical module.
Refer to the System Time Stamping User Guide for detailed diagnostic information.
Open the Page
Access the NTP Diagnostic information:
Step
Action
1
In the DTM Browser, find the name that is assigned to your Ethernet communications module.
2
Right-click on the module name.
3
Scroll to Device menu → Diagnosis.
4
In the left pane of the Diagnosis window, select the communication module node.
5
Select the NTP Diagnostic tab to open that page.
Click the Reset Counter button to reset the counting statistics on this page to 0.
Network Time Service Diagnostic Parameters
This table describes the time synchronization service parameters:
Parameter
Description
Refresh Every 500ms
Check this box to dynamically update the page every 500ms. The number of times this page has been refreshed appears immediately to the right.
Network Time Service
Monitor the operational status of the service in the module:
  • green: operational
  • orange: disabled
Network Time Server Status
Monitor the communication status of the NTP server:
  • green: The NTP server is reachable.
  • red: The NTP server is not reachable.
Last Update
Elapsed time, in seconds, since the most recent NTP server update.
Current Date
System date
Current Time
The system time is presented in the hh:mm:ss format.
DST Status
Set the status of the automatic daylight savings service:
  • ON: The automatic adjustment of daylight savings is enabled. The current date and time reflect the daylight savings time adjustment.
  • OFF: The automatic adjustment of daylight savings is disabled. (The current date and time may not reflect the daylight savings time adjustment.)
Quality
This correction (in seconds) applies to the local counter at every NTP server update. Numbers greater than 0 indicate increasingly excessive traffic condition or an NTP server overload.
Requests
This value represents the total number of client requests sent to the NTP server.
Responses
This value represents the total number of server responses sent from the NTP server.
Errors
This value represents the total number of unanswered NTP requests.
Last Error
This value indicates the last detected error code received from the NTP client:
  • 0: good NTP configuration
  • 1: late NTP server response (can be caused by excessive network traffic or server overload)
  • 2: NTP not configured
  • 3: invalid NTP parameter setting
  • 4: NTP component disabled
  • 5: primary and secondary IP addresses that are not NTP server address
  • 7: unrecoverable NTP transmission
  • 9: invalid NTP server IP address
  • 15: invalid syntax in the custom time zone rules file
Primary / Secondary NTP Server IP
The IP addresses correspond to the primary and secondary NTP servers.
NOTE: A green LED to the right of the primary or secondary NTP server IP address indicates the active server.
Auto Adjust Clock for Daylight Savings
Configure the daylight savings adjustment service:
  • enabled
  • disabled
DST Start / DST End
Specify the day on which daylight savings time begins and ends:
Month
Set the month in which daylight savings time starts or ends.
Day of Week
Set the day of the week on which daylight savings time starts or ends.
Week#
Set the occurrence of the specified day within the specified month.
Time Zone
Select the time zone plus or minus Universal Time, Coordinated (UTC)
Offset
Configure the time (in minutes) to be combined with the time zone selection (above) to produce the system time.
Polling Period
Set the frequency with which the NTP client requests an updated time from the NTP server