Network Time Service Diagnostics
(Original Document)
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Diagnosing the Network Time Service
Use the Network Time Service Diagnostic page to display dynamically generated data describing the operation of the network time protocol (NTP) service that you configured in the NTP Client page in Control Expert.
NOTE: Before you can open the Diagnostic window, connect the DTM for the target communication module to the physical module itself. To do this, select the module node in the DTM Browser, then select Edit → Connect.
The Network Time Service Diagnostic page looks like this:
Click the Reset Counter button to reset the counting statistics on this page to 0.
To open this page:
Step
Action
1
In the DTM Browser, select the communication module and click the right mouse button. A pop-up menu opens.
2
In the menu, select Device menu → Diagnostic. The Diagnostic window opens.
3
In the left pane of the Diagnostic window, select the communication module node.
4
Click on the NTP Diagnostic tab to open that page.
Network Time Service Diagnostic Parameters
Time synchronization service parameters are in the table:
Parameter
Description
Refresh Every 500ms
Select this to dynamically update this page every 500ms. The number of times this page has been refreshed appears immediately to the right (in this example, 785).
Network Time Service
Operational status of the service in the module:
  • green = Operational
  • orange = Service Disabled
Network Time Server Status
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
System time in hh:mm:ss format
DST Status
The actual working status of the automatic daylight savings service:
  • ON = automatic adjustment of daylight savings is enabled and the current date and time reflect the daylight savings time adjustment
  • OFF = automatic adjustment of daylight savings is disabled; or automatic adjustment of daylight savings is enabled, but the current date and time may not reflect the daylight savings time adjustment
Quality
The correction, in seconds, applied to the local counter at every NTP server update.Numbers greater than 0 indicate increasingly excessive traffic condition or NTP server overload.
Requests
Total number of client requests sent to the NTP server
Responses
Total number of server responses sent from the NTP server
Errors
Total number of unanswered NTP requests
Last Error
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
  • 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 address of the primary and the secondary NTP server
NOTE: A green LED to the right of the primary or secondary NTP server IP address identifies the currently active server.
Auto Adjust Clock for Daylight Savings
The configuration setting of the daylight savings adjustment service:
  • enabled
  • disabled
DST Start / DST End
Specifies the day that daylight savings time begins and ends:
Month
The month daylight savings time starts or ends
Day of Week
The day of the week daylight savings time starts or ends
Week#
The occurrence of the specified day within the specified month.
Time Zone
Time zone plus or minus Universal Time, Coordinated (UTC)
Offset
The time, in minutes, to be combined with the selected Time Zone selection to produce the system time.
Polling Period
The frequency the NTP client requests time updates from the NTP server