60 Rockwell Automation Publication ENET-UM004B-EN-P - November 2015
Chapter 6 Module Diagnostics
Time Sync Category
The Time Sync displays information that is related to CIP Sync time
synchronization. The information appears only if the project is online and CIP
Sync is enabled.
Table 5 - Time Sync Parameters
Grandmaster Clock
Description Displays information about the Grandmaster clock. The vendor of the Grandmaster
device controls this information. The following information is specified:
• User Name
• User Location
• Protocol Address
• Physical Address
• Clock Type
• Manufacturer Name
• Model
• Serial Number
• Hardware Revision
• Firmware Revision
• Software Revision
• Profile Identity
• Physical Protocol
• Network Protocol
• Port Number
Use the vertical scroll bar to view the data.
Identity Displays the unique identifier for the Grandmaster clock. The format depends on the
network protocol. Ethernet network encodes the MAC address into the identifier.
Class Displays a measure of the quality of the Grandmaster clock. Values are defined from
0…255 with zero as the best clock.
Accuracy Indicates the expected absolute accuracy of the Grandmaster clock relative to the PTP
epoch. The accuracy is specified as a graduated scale that starts at 25 nsec and ends at
greater than 10 seconds or unknown. The lower the accuracy value, the better the
clock.
Variance 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.
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