Diagnostics Via Status Bits - Festo CPX-FB33 Operating Instructions Manual

Diagnostics
M – parameterisation modified or forcing active
LED Sequence
LED is off
LED illumin-
ated
LED flashes
Tab. 22 CPX terminal status LED – M
The display of the Forcen function (LED M flashing) has priority over the display of the setting for the
system start (LED M on).
10.3

Diagnostics via status bits

The CPX terminal provides 8 status bits - depending on the hardware configuration of the controller.
The status bits are used to display common diagnostic messages (global error messages). 8 status
bits are configured like inputs, the address can be freely selected during configuration. The status bits
are transmitted cyclically to the controller with all other inputs. If all status bits return logic 0, no error
will be registered.
Diagnostics via status bits enables fast access to error messages in the PLC user program.
Festo — CPX-(M)-FB33/34/35/43/44/45 — 2020-04e
Status
– System start with factory
setting (default paramet-
erisation) and current CPX
configuration
– External parameterisation
possible (default)
– System start with saved
parameterisation and saved
CPX configuration
– Parameters and CPX config-
uration are stored perman-
ently; external paramet-
erisation is blocked
– Forcing active
Significance/error handling
–
Caution when replacing a CPX
terminal with saved paramet-
erisation (LED M on):
In case of servicing, such as
with replacement of the CPX ter-
minal, parameterisation is not
created automatically by the
PLC or the higher-order system.
In this case, before replacing
check which settings are
required and adjust them if
necessary.
The Forcen function is enabled;
Force mode, function no. 4402
CPX system description (CPX-
è
SYS- )
...
23