Festo CTEU-DN, Description, Functions And Maintenance

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A. Technical appendix
A-11
Festo P.BE-CTEU-DN-OP+MAINT-EN en 1206NH
A.3 Fail state behaviour
The parameterisation of the fail state mode regulates the
behaviour of the bus node and the connected I-port devices
in the event of communication errors (
Section 4.3.4 and
5.3).
Note
The fail state mode requires the corresponding DeviceNet
function to be activated in the PLC.
Behaviour Settings Processing Diagnostics
of the bus
node/field-
bus of the connec-
ted I-port
device of the fail state
mode (DIL
switches) of the incoming PLC
control signals for
OUT/VAL
OK Timeout OFF I/Os are reset – Bus nodes LED
X1
and/or LED X2 illu-
minate/illuminate
red
– Master controller re-
ports a connection
fault
ON I/Os remain set
(“Hold last state”)
Timeout OK OFF I/Os are reset – Bus node LED MNS
illuminates red
ON I/Os remain set
(“Hold last state”)
Timeout OFF I/Os are reset – Bus nodes LED X1
and/or LED X2 illu-
minate/illuminate
red
– Bus node LED MNS
illuminates red
ON I/Os remain set
(“Hold last state”)
Tab. A/9: Fail state behaviour in dependence of bus nodes/field bus, I-port device and
fail state mode setting