2
Function
Festo – CPX-E-PB-EN – 2017-07 – English
11
2.4.1
LED indicators
This document describes the network-specific LED indicators. The system-specific LED indicators are
described in the documentation for system CPX-E
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1.1 Further applicable documents.
Bus error [BF]
LED (red)
Significance
Remedy
flashes
Station number not correct (e.g. address
assigned twice)
Check address setting of the DIL switches in
the bus module.
Bus interface faulty
Check bus interface of the master.
Bus connection interrupted or short-circuited
Check bus connection.
Faulty configuration
Check configuration of the master.
Bus connection poor or transmission rate not
detected
Reduce transmission rate.
off
No error
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Tab. 2.7
2.4.2
Status bits
System CPX-E provides 8 status bits for displaying global common diagnostic messages.
The status bits are configured like inputs and supply coded diagnostic information in the form of 0 or 1 signals. If all
status bits are supplying a 0 signal, there is no error. If, in contrast, a status bit supplies a 1 signal, there is an error.
In order to make use of the status bits function, the bus module of the system CPX-E must be configured
accordingly.
The status bits are displayed in the process image insofar as set by the selection of the catalogue entry
“CPX-E-PB DP-Slave [Status]” in the hardware configurator.
If different errors occur simultaneously on different module types, errors cannot be assigned.
To clearly determine errors, the I/O diagnostic interface can be used
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2.4.3 I/O diagnostic interface.
You can find detailed information about status bits in the “Description of system CPX-E”
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1.1 Further applicable documents.
2.4.3
I/O diagnostic interface
The system CPX-E provides an I/O diagnostic interface in the form of 16 input bits and 16 output bits for reading
detailed diagnostic information. The I/O diagnostic interface can be used, for example, to precisely determine the
module and channel on which an error has occurred. In order to make use of the I/O diagnostic interface, the bus
module of the system CPX-E must be configured accordingly.
The I/O diagnostic interface is displayed in the process image insofar as set by the selection of the catalogue entry
“CPX-E-PB DP-Slave [DP-V1]” in the hardware configurator.
You can find detailed information about the I/O diagnostic interface in the “Description of system CPX-E”
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