Rockwell Automation 1756-SYNCH ControlLogix SynchLink Module User Manual - Manual (Page 136)

Publication 1756-UM521C-EN-P - July 2004
Glossary 4
Remote axis data
Motion data used by the motion planner in the controller. The
1756-SYNCH module can consume an Axis tag from a controller and
pass it over SynchLink. A controller in another chassis can then
consume axis tags passed over SynchLink from the 1756-SYNCH
module in that chassis.
Removal and insertion under power (RIUP)
A ControlLogix feature that allows a user to install or remove a
module while power is applied.
Requested packet interval (RPI)
A configurable parameter which defines when the module will
multicast data.
Ring Configuration
SynchLink configuration that begins with the master node.
Unidirectional data passes from the master node to up to nine other
nodes and then back to the master node.
RSLogix 5000
The programming software for any ControlLogix system.
Star configuration
A SynchLink topology where a hub is the physical center of the link,
and SynchLink nodes are connected to the hub. Each node has its
own direct, dedicated line to the hub. The hub acts as a multi-port
repeater and contains one receive and up to 16 transmit ports. The
Producer/Master node transmitter is connected to the hub receiver.
The receiver of each of the Consumer/Slave nodes is connected to an
appropriate hub transmitter. The Producer/Master node receiver and
Consumer/Slave node transmitters are not connected. Messages
transmitted by the Producer/Master node are retransmitted (repeated)
simultaneously to all Consumer/Slave nodes by the hubs.
SynchLink
A unidirectional fiber optic communications link that provides time
synchronization and data broadcasting. These functions are used for
distributed motion and coordinated drive control systems based on
ControlLogix and PowerFlex™ 700S products.