Allen-Bradley Stratix 8300 User Manual

Rockwell Automation Publication 1783-UM003G-EN-P - December 2012 137
Manage the Switch via RSLogix 5000 Software Chapter 4
Accuracy N/A Indicates the expected absolute accuracy of the
Grandmaster clock relative to CIP Sync time
synchronization epoch (31 December, 1969
23:59:51.99918 UTC). The accuracy is specified as a
graduated scale starting at 25 nanoseconds and ending
at greater than 10 seconds or unknown.
For example, a GPS time source will have an accuracy of
approximately 250 nanoseconds. A hand-set clock will
typically have accuracy less than 10 seconds. The lower
the accuracy value, the better the clock.
Variance N/A Displays the measure of inherent stability properties of
the Grandmaster clock. The value is represented in offset
scaled log units. The lower the variance, the better the
clock.
Source • Atomic Clock
• GPS
• Terrestrial Radio
• CIP Time Synchronization
• NTP
• HAND Set
• Other
• Internal Oscillator
Displays the clock time source.
Priority 1
Priority 2
N/A Displays the relative priority of the Grandmaster clock to
other clocks in the system. The value is between 0…255.
The highest priority is 0.
Local Clock N/A Displays properties for the local clock.
Sync Status • Synchronized
• Asynchronized
Displays whether the local clock is synchronized or
asynchronized with the Grandmaster clock.
Identity N/A Displays the unique identifier for the local clock. The
format depends on the network protocol.
• The Ethernet protocol encodes the MAC address into
the identifier.
• The DeviceNet and ControlNet protocols encode the
Vendor ID and serial number into the identifier.
Class N/A Displays a measure of the quality of the local clock.
Values are defined from 0…255 with 0 as the best clock.
Accuracy N/A Indicates the expected absolute accuracy of the local
clock relative to CIP Sync time synchronization epoch (31
December, 1969 23:59:51.99918 UTC). The accuracy is
specified as a graduated scale starting at 25
nanoseconds and ending at greater than 10 seconds or
unknown.
For example, a GPS time source will have an accuracy of
approximately 250 nanoseconds. A hand-set clock will
typically have accuracy less than 10 seconds. The lower
the accuracy value, the better the clock.
Variance N/A Displays the measure of inherent stability properties of
the local clock. The value is represented in offset scaled
log units. The lower the variance, the better the clock.
Source • Atomic Clock
• GPS
• Terrestrial Radio
• CIP Time Synchronization
• NTP
• HAND Set
• Other
• Internal Oscillator
Displays the clock time source.
Time Sync Information
In this field Values are Comments

Allen-Bradley Stratix 8300 Specifications

General

Brand	Allen-Bradley
Model	Stratix 8300
Category	Switch
Language	English