Festo CPX-CMAX - Faults and Warnings

6 Diagnostics and error handling
Festo – P.BE-CPX-CMAX-SYS-EN – en 2017-09b – English 67
6.4 Faults and warnings
The CMAX permanently monitors the operating status and issues corresponding diagnostic messages
in the event of deviations from the nominal status.
Diagnostic messages for malfunctions are categorised as faults or warnings, depending on the cause
and effect, and can be evaluated in detail and processed.
Malfunctions Effect Acknowledge
Faults
Events and statuses that jeo
pardize or prevent correct op
eration of the CMAX.
– Red fault LED is illuminated
– Fault number E... is shown on the display
– SCON.FAULT = 1 is set
– Effect on the sequence control dependent
on the error level è Section 6.4.1
Required
è Section 6.4.2
Warnings
Events and statuses that may
impair operation.
– SCON.WARN = 1 is set
– The sequence control and the axis are not
affected
Not required
Tab. 6.5 Faults and warnings
List of faults and warnings è Section 6.4.4.
Some diagnostic messages can be classified optionally as warning or fault with FCT or
PNU 228:03. Section 6.4.4 shows the step assigned at the plant (e.g. F2). Alternative
steps that can be set are listed in brackets. F2 (W) therefore means “factory setting step
F2, alternative step W”.
6.4.1 Effect on the sequence control and axis – error level
Dependent on the error level, faults and warnings have the following effect:
Error level Effects on SCON
1)
Sequence control Axis FAULT WARN
W (Warning) – (None) – 1
F1 (Fault 1) Transition to the “fault” status Stop 1 –
F2 (Fault 2) Drive blocked 1 –
FS (System fault) System fully stopped x x
1) Status of status bits: – = no effect; 0 = logic 0, 1 = logic 1; x = no updating
Tab. 6.6 Error levels
– F1 (fault 1): The axis is stopped. Behaviour with stop è Communication profile description.
– F2 (fault 2): Controller inactive, the drive moves using residual energy until it comes to rest. If com
munication with the displacement encoder/sensor interface fails, the possibility exists that homing
may be lost (SPOS.REF = 0).
– FS (system fault): It may no longer be possible to update the I/O data.
Switching off/on required.