Rockwell Automation 1756-SYNCH ControlLogix SynchLink Module User Manual - Manual (Page 133)

1 Publication 1756-UM521C-EN-P - July 2004
Glossary
Buffered data
Data exchanged between SynchLink nodes. The data is appropriately
segmented at the transmitting module and reassembled at the
receiving module. Buffered data cannot be automatically forwarded to
the next node in the daisy chain configuration.
Center node
A node in the SynchLink Daisy Chain or Ring configuration that
receives data and transmits data.
Communications format
Format that defines the type of information transferred between an
I/O module and its owner controller. This format also defines the tags
created for each I/O module.
Compatible match
An electronic keying protection mode that requires the physical
module and the module configured in the software to match
according to vendor, catalog number and major revision. In this case,
the minor revision of the module must be greater than or equal to that
of the configured slot.
Connection
The communication mechanism from the controller to another module
in the control system.
Coordinated system time (CST)
Clock that is used in:
• all modules in a single ControlLogix chassis
or
• all ControlLogix chassis in a distributed control system.
The SynchLink system can synchronize this clock value across chassis.