User Manual

Table Of Contents
Glossary • 225
WAGO-I/O-SYSTEM 750
I/O Modules
Signal strength
The signal strength is an indicator of reception quality. The higher the signal
strength, the better the reception.
Slave
A slave (also end device) does not accept any administrative tasks in a de-
vice network. Opposite: Master (also Coordinator).
Slot
For this module: A slot represents a part of the process image (PI) that is re-
served for data exchange with a specific remote device.
SMA
SMA (Sub-Miniature-A) indicates a special design for coaxial connectors.
SMAs are used, for example, to connect external antennas.
SPP
The "Serial Port Profile" is a specific Bluetooth
®
profile.
Stack
Function libraries that implement protocols and interfaces with high-level
languages are known as stacks. Stacks are generally available on the market.
They simplify and accelerate the development of new devices, as protocol
communication at the lowest level is already implemented by the stack, ena-
bling the developer to build directly upon the application level.
Status byte
For this module: A specific byte of the cyclic process image input (PII) that
provides information on the system status for the run time.
Subsystem
Part of a whole system with which it is connected over defined interfaces.