Time Sync view parameters
The
Time Sync
settings provide information related to the CIP Sync clocks in the network or in the local chassis.Information about the clocks is not displayed when the device is offline or CIP Sync Time Synchronization is disabled.
Parameter | Description |
|---|---|
CIP Sync time synchronization | Indicates if Time Synchronization is enabled or disabled on the device. |
UTC system time | Indicates the current system time in Universal Coordinated Time (UTC). The time does not include time zone or daylight savings time offsets. |
Grandmaster Clock | Displays property information for the grandmaster clock. |
Description | Displays information about the clock. The grandmaster clock is controlled by the vendor of the grandmaster clock. Information includes:
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Identity | Displays the unique identifier for the clock. The format depends on the network protocol. Ethernet network encodes the MAC address into the identifier while ControlNet and DeviceNet networks encode the vendor ID and serial number into the identifier. |
Class | Displays the measure of the traceability of the clock to primary reference sources. This is pre-defined by the hardware manufacturer. Values are defined from 0 through 255 with zero (0) as the best clock. Clocks with Class values below 128 may only be master clocks. |
Accuracy | Displays the expected absolute accuracy of the clock relative to the clock epoch of January 1, 1970. The accuracy is specified as a graduated scale starting at 25 nsec and ending at greater than 10 seconds or unknown. The lower the accuracy value, the better the clock. |
Variance | Displays the measure of the inherent stability properties of the clock. The value is represented in offset scaled log units. The lower the variance, the better the clock. |
Source | Displays the time source of the clock. The available values are Atomic clock, GPS, Radio, PTP, NTP, HAND set, Other, and Oscillator. |
Priority 1 / Priority 2 | Displays the relative priority of the clock to other clocks in the system. The priority values range from 0 through 255. The highest priority is zero (0). The default value for both settings is 128. |
Local Clock | Displays property information for the local clock. The definitions for the Identity, Class, Accuracy, Variance, and Source parameters are the same for the local clock and the grandmaster clock. Refer to the descriptions above. |
Synchronization status | Specifies whether the local clock is synchronized or not synchronized with the grandmaster reference clock. A clock is synchronized if it has one port in the slave state and is receiving updates from the time master. |
Offset to master | Displays the amount of deviation between the local clock and the grandmaster clock in nanoseconds, updated every sync interval. |
Backplane | Displays the current state of the backplane. The available values are:
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Ethernet | Displays the state of the Ethernet port. The available values are:
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