Siemens SIMATIC Ident System Manual page 283

L
x
Length of a transmission window in the x direction
L
y
Length of a transmission window in the y direction
M
Centerpoint of a field of a transmission window
Metal-free area
Distance/area which must be maintained between the transponder and metal in order to
prevent interference during data transfer between the transponder and read/write device.
Mobile data storage units (MDS)
See transponder
Multi-tag capability
Multi-tag capability means the ability to use several read/write devices which communicate
simultaneously with different data carriers.
Programmable logic controller (PLC)
The programmable logic controllers (PLC) of the SIMATIC S5 system consist of a central
controller, one or more CPUs, and various other modules (e.g. I/O modules).
Read/write devices (SLG)
See readers
Read/write distance
See transmission distance
Readers
Readers ensure fast, secure data transfer between mobile data storage units and higher-
level systems (PLCs, PCs, etc.). The data, energy included, are transmitted inductively
across an electromagnetic alternating field or by radio. This principle enables contact-free
data transmission, ensures high industrial compatibility and works reliably in the presence of
contamination or through non-metallic materials.
SIMATIC RF200
System Manual, 09/2013, J31069-D0227-U001-A8-7618
Glossary
283