Fail State Behaviour - Festo CTEU-DN Description, Functions And Maintenance

A. Technical appendix
A.3

Fail state behaviour

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