Diagnostics Via Status Bits - Festo CPX-FB37 Translation Of The Original Instructions

5 Diagnostics
5.3

Diagnostics via status bits

The CPX terminal provides 8 status bits if this function is activated using DIL switches
( Section 3.2.6).
The status bits are used for displaying common diagnostic messages ("global" error messages). Status
bits are configured like inputs. If the status bits function is activated, 16 inputs are occupied in the
address range (8 inputs or 8 bits remain unused); (
Note the instructions on addressing and configuration in the sections 4.3 and 4.5.
The following table provides an overview of the available diagnostic information.
Bit Diagnostic information with logic 1
0 Error on valve or pneumatic module
1 Error on output module
2 Error on input module
3 Error on analogue module or technology module
4 Undervoltage
5 Short circuit/overload
6 Wire break
7 Other errors
Tab. 5.10 Overview of diagnostic information: Status bits of the CPX bus node (optional)
If all status bits supply a 0-signal, no fault will be registered . If, in contrast, a status bit supplies a 1 -signal,
there is a fault.
If various faults occur simultaneously on various types of modules, these faults cannot be assigned via
the status bits. In contrast, faults can be uniquely determined via the I/O diagnostics interface.
Diagnostic information or error messages of the status bits functions (or I/O diagnostic interface) can
be read out using the operator unit (CPX-MMI), the Festo Maintenance Tool (CPX-FMT) and via the
EtherCAT network.
Further notes on the function and content of the status bits can be found in the CPX sys-
tem description (P.BE-CPX-SYS...) in the section "Diagnostics and error handling".
64
Tab. 3.3).
Description
Module type in which an error has oc-
curred
Error type
Festo – P.BE-CPX-FB37-EN – 1406NH – English