Reaction To Errors In The Control System - Festo CP-FB11-E Programming Manual

3. Diagnosis
3.3

Reaction to errors in the control system

PLC/protocol
DeviceNet
Festo P.BE−CP−FB11−E−EN en 0802d
Reaction of the CP system
after PLC stop
Valves and electric
outputs are reset.
Please note
If all the outputs are reset in the event of a PLC stop, field
bus interruption or field bus fault, the following pneu
matic rules" must be observed.
Unilaterally−actuated valves move to the basic position.
Double−solenoid valves remain in the current position.
Mid−position valves move to the mid−position and
(depending on valve type) are pressurized, exhausted or
blocked.
to field bus faults
Valves and electric
outputs are reset when
timeout has expired.
to field bus
interruption
Valves and electric
outputs are reset
immediately.
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