Festo CTEU-PB Electronics Description page 14

Contents and general safety instructions
Term/abbreviation
Master
O, I
OB
Operating voltage
PLC
Power supply
PROFIBUS DP
Slave
Station address
Status bits
PLC/IPC
SYNC
Tab. 0/1: Terms and abbreviations
XII
Significance
The master/DP master is an active device that determines the data traffic
in the fieldbus system PROFIBUS-DP and may send messages/commands
without external request if there is a transmission authorisation.
The DP master can be an individual device or part of a programmable logic
controller (PLC).
Digital output, digital input
Output byte
also designated signal voltage : includes the power supply for electronics
and sensors
Programmable Logic Controller (German: Speicherprogrammierbare
Steuerung (SPS))
Heading term for operating and load voltage supplies
is the PROFIBUS variant for speed-optimised, serial data exchange with
decentralised stations and is performed cyclically with the protocol DPV0.
The slave/DP slave is a passive peripheral device that receives messages/
commands of the master, implements and acknowledges them or re-
sponds with a message on request of a master.
Address of the fieldbus station, also designated PROFIBUS address or
station number
Internal inputs, which supply coded common diagnostic messages
programmable logic controller/industrial PC, also designated system
controller or controller (German: SPS)
A SYNC command causes all slaves addressed by the master to freeze
their own output data and buffer the data transferred from the master,
which will be switched through to the physical outputs at the next SYNC
command.
A SYNC command is cancelled with UNSYNC.
Festo P.BE-CTEU-PB-OP+MAINT-EN en 1208NH English