The Control System (CS) will initiate ALL communications with the ST100 except as noted below. The ST100 will respond to CS commands within 20 milliseconds after complete receipt of a command.
Customer-programmable devices that operate as an event-driven device
Transmits information to the External Control System (ECS) when a change is detected
The ECS may poll a control panel at any time for current status information
Used for machine control, file maintenance, clip control, etc
Available in the ST100, ST300, ST400, ST420, ST450 platforms