Rockwell Automation Publication 1783-UM007G-EN-P - February 2017 209
Configure Switch Features Chapter 7
View Time Sync Information in the Logix Designer Application
In the navigation pane, click Time Sync Information.
The Time Sync Information view shows current information about the real-
time clocks in the network. The CIP Time Synchronization protocol provides
a standard mechanism to synchronize clocks across a network of distributed
devices.
The CIP Sync Time Synchronization feature supports both Boundary and
End-to-End Transparent mode. End to End Transparent mode synchronizes all
switch ports with the grandmaster clock using the IEEE 1588 V 2 End to End
Transparent clock mechanism, and is the preferred mode.
Delay Request Interval Type the recommended to connected devices to send delay request messages when the switch port is in the master state.
Valid values:
• -1—half second
• 0—1 second
• 1—2 seconds
• 2—4 seconds
• 3—8 seconds
• 4—16 seconds
• 5—32 seconds
• 6—64 seconds
Default: 5 (32 seconds)
Announce Timeout Type the number of announce intervals, specified as the logarithmic mean in seconds, that must pass without receipt of an announce message
from the parent or grand master clock before the switch selects a new parent or grand master clock.
Valid values: 2…10
Default: 3 (8 seconds)
Announce Interval Type the time interval, specified as the logarithmic mean in seconds, for sending announce messages.
Valid values:
• 0—1 second
• 1—2 seconds
• 2— 4 seconds
• 3— 8 seconds
• 4—16 seconds
Default: 1 (2 seconds)
Sync Interval Type the time interval, specified as the logarithmic mean in seconds, for sending synchronization messages.
Valid values:
• -1—half second
• 0—1 second
• 1— 2 seconds
Default: 0 (1 second)
Sync Fault Limit Type the maximum clock offset before PTP attempts to reacquire synchronization.
Valid values: 50…500000000 nanoseconds
Default: 50000 nanoseconds
IMPORTANT: We recommend against setting the sync limit below the default (50000 nanoseconds). Use values below 50000 nanoseconds only in
networks with a very high-precision grandmaster clock. These networks have a critical need to keep very sensitive devices synchronized.
Table 39 - NTP-PTP Mode Fields (continued)
Field Description
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