Glossary - Siemens SIMATIC ET 200SP Manual

Glossary

"Protected operation"
In "protected operation", the AS-i master only exchanges data with the configured AS-i
slaves. "Configured" means that the slave addresses and configuration data stored in the
AS-i master agree with the values of existing AS-i slaves.
APF
AS-i Power Fail. Flag or LED display that indicates that the supply voltage on the AS-i cable
is too low or has failed, e.g., failure of the AS-i power supply unit.
AS-i (AS-Interface)
Actuator-Sensor-Interface. A networking system for the plant-floor automation layer. It is
suitable for networking sensors and actuators with controllers.
AS-i analog slave
AS-i analog slaves are special AS-i standard slaves that exchange analog values with the
AS-i master; see also CTT.
AS-i master
The AS-i master monitors and controls simple digital or analog sensors and actuators via
AS-i modules or AS-i slaves.
AS-i slave
All devices that can be addressed by an AS-i master are referred to as AS-i slaves. AS-
i slaves are distinguished according to their design (AS-i modules as well as sensors or
actuators with integrated AS-i connection) and their addressing type (AS-i slave with
standard address in the range 0 ... 31 and AS-i slave with A/B address in the range 0,
1A ... 31A, 1B, 31B) or their functionality (standard slave for non-safety-related data
transmission and ASIsafe slave for safety-related data).
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
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