Siemens SIMATIC S5 Manual page 318

T
ID2
Token
Token ring
Token runtime
T
QUI
T
RDY
T
SET
T
SL
T
TR
UNFREEZE
UNSYNC
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
A bus parameter; idle time 2 is the idle time which elapses after sending of a
call without response.
A telegram representing the send authorization in a network. The token
signals the states "seized" and "free". The token is passed from master to
master.
Each master physically interconnected by a bus receives the token and passes
it to the next master in turn. The masters participate in what is known as a
token ring.
The time that elapses between the receipt of two consecutive
Quiet time for modulator; the time for switching from send to receive. The
quiet time for modulator allows for the operation of switching off the
transmitter and switching on the receiver.
Ready time for acknowledgment or response.
Setup time. The setup time is the time that may elapse between reception of a
telegram and the associated reaction.
Slot time. The slot time is the maximum time the transmitter allows for a
response from the station it addresses.
Target rotation time. Each master compares the target rotation time with the
actual token runtime. The difference is the factor which determines the time
that the DP master can use to send its data telegrams to the slaves.
FREEZE
SYNC
Glossary
tokens.
Glossary-11