Festo CTEU-PB Electronics Description page 13

Contents and general safety instructions
Term/abbreviation
Bus nodes
CLEAR_DATA
DI, DO, DX
DIL switches
DP
F0
h
Fail state
FREEZE
GSD
Hold last state
I & M
Load voltage
Festo P.BE-CTEU-PB-OP+MAINT-EN en 1208NH English
The following product and fieldbus-specific terms and abbre-
viations are used in this description:
Significance
create the connection to certain fieldbuses/networks, pass on control
signals to the connected devices/modules and monitor their functioning.
This command, sent by the master, resets all outputs of the addressed
slave.
Digital inputs (DI) or outputs (DO) or digital inputs and outputs (DX)
Dual-In-Line switches usually comprise several switch elements that can
be used to make hardware settings.
PROFIBUS protocol for decentralised peripheral equipment, such as
sensors and actuators, and their cyclical communication functions (data
exchange and diagnostic messages) through DPV0-protocol or acyclic,
need-dependent data exchange and alarm handling through DPV1-pro-
tocol.
Hexadecimal numbers are marked by a low-set "h".
This is a function which can automatically activate the "Hold last state" in
the event of connection errors (program abort or timeout of the fieldbus
connection) and is also designated "fail safe" in some cases.
This command, sent by the master, freezes all inputs of the slave. The
slave now sends a constant image of all inputs, independent of their fur-
ther change in status. The input image is updated with each further trans-
mission of the FREEZE command.
A FREEZE command is cancelled with UNFREEZE.
General Station Description (or Gerätestammdatei - device master file)
stands for the individual electronic data sheet of the device type. It is
made available by the device manufacturer.
defines the status which outputs/valves are to assume after fieldbus
and/or communication errors
stands for 'Identification and Maintenance' and represents the electronic
name plate of the bus node.
includes the power supply for connected devices and (digital) outputs,
e.g. solenoid coils of valves
XI