Rockwell Automation Publication 1769-UM021I-EN-P - May 2018 287
Develop Integrated Motion over an EtherNet/IP Network Application Chapter 11
If your solution requires more than 16 Position Loop-configured drives,
consider using the ControlLogix® platform. The ControlLogix platform
enables up to 100 Position Loop-configured drives.
Time Synchronization
Integrated Motion over an EtherNet/IP network requires Time
Synchronization, also known as CIP Sync. CIP Sync provides accurate real-
time (real-world time) or Coordinated Universal Time (UTC)
synchronization of CompactLogix 5370 controllers and devices that are
connected over an EtherNet/IP network.
CIP Sync is a time-synchronization protocol that can be applied to various
applications. This chapter focuses on how to use the protocol in applications
with Integrated Motion over an EtherNet/IP network.
In a CompactLogix system, the following devices are CIP Sync-capable:
• All CompactLogix 5370 controllers - Required
All controllers and communication modules must have time synchronization
enabled to participate in CIP Sync.
CIP Sync requires that devices in the system function in the following roles:
• Grandmaster, also known as the coordinated system time (CST) master
- Sets time for entire system and passes the time to a Master
• Master - Sets time for its backplane
• Slave - Uses time set by Master
IMPORTANT While all CompactLogix 5370 controllers are CIP Sync-capable, not
all controllers support Integrated Motion over an EtherNet/IP
network.
A controller must be CIP Sync-capable and synchronized with other
devices on the EtherNet/IP network to support Integrated Motion
over an EtherNet/IP network. However, the condition of being CIP
Sync-capable does not exclusively qualify a CompactLogix 5370
controller to support Integrated Motion over an EtherNet/IP
network.
Table 38 on page 286
lists the CompactLogix 5370 controllers that
support Integrated Motion over an EtherNet/IP network.
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