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2
Function
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 è 1.1 Further applicable documents.
Bus error [BF]
LED (red)
Significance
Station number not correct (e.g. address
assigned twice)
flashes
Bus interface faulty
Bus connection interrupted or short-circuited
Faulty configuration
Bus connection poor or transmission rate not
detected
No error
off
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 è 2.4.3 I/O diagnostic interface.
You can find detailed information about status bits in the "Description of system CPX-E"
è 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"
è 1.1 Further applicable documents.
Festo – CPX-E-PB-EN – 2017-07 – English
Remedy
•
Check address setting of the DIL switches in
the bus module.
•
Check bus interface of the master.
•
Check bus connection.
•
Check configuration of the master.
•
Reduce transmission rate.
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11
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