CST Multicast Messages
The ControlLogix5550 controller sends a CST
multicast message to the
I/O modules at a periodic rate to synchronize the timer hardware in all of the modules.
controller
A device that controls machines or processes elements (for example, a programmable controller or relay panel).
multicast
A mechanism by which a module can produce data on a network simultaneously received by more than one listener. This term is used to describe a feature of the ControlLogix I/O line. It supports multiple controllers receiving input data from the same I/O module at the same time.
I/O (input/output)
Devices that provide and/or receive data from the controller.
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