Festo CPX-FB6 Manual page 15

Contents and general safety instructions
Term/abbreviation
I/Os
I/O diagnostic interface
I/O modules
Midi/maxi
MPA
O
Parameter data
PCP channel
Peripheral faults (PF)
PLC/IPC
Pneumatics interface
Process data
Remote bus
Festo P.BE-CPX-FB6-EN en 1207c
Significance
Digital inputs and outputs
The I/O diagnostic interface is a bus-independent diagnostic interface at
I/O level, permitting access to internal data of the CPX terminal.
Common term for the CPX modules which provide digital inputs and out-
puts (CPX input modules and CPX output modules).
Pneumatic modules/valve terminal type 03
Pneumatic modules/valve terminal type 32
Digital output
Data for parametrisation, diagnostics and configuration which are trans-
mitted acyclically in a multiplex procedure via the PCP channel.
Stations that can also process parameter data are also known as PCP
stations. Communication between these stations and the interface mod-
ule takes place via the Peripheral Communication Protocol (in brief: PCP
or PCP channel). PCP is an integral part of the Interbus protocol.
Malfunctions in the peripherals of Interbus stations are shown by means
of peripheral faults (dependent on station), e.g.:
– load voltage failure
– short circuit at the outputs, etc.
The peripheral fault is a common error message and does not contain any
module-specific information.
Programmable logic controller/industrial PC
The pneumatics interface is the interface between the modular electrical
peripherals and the pneumatics.
I/O data from the Interbus stations transmitted cyclically via the Interbus,
e.g. for:
– light barriers, sensors
– valves, contactors
– diagnostic I/Os.
The remote bus bridges long distances within an Interbus system (main
string). With baud rates of 500 kBd and 2 MBd, it can be up to 12.8 km
long (from the interface module to the last connected remote bus sta-
tion). Individual segments can be up to 400 m long.
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