3. Diagnosti cs
3-21
Festo P.BE-CTEU-EC-OP+MAINT-EN en 1208NH
Note
Take account of valve behaviour in your EMERGENCY STOP
concept/fail-safe settings!
If the outputs are reset when the controller stops or in case
of network interruption, telegram failure or a terminal
fault, the valves will behave as follows:
– Monostable valves will move to their normal position
– Double-solenoid valves will remain in their current posi-
tion
– Mid-position valves will mo ve to their neutral position
(pressurised, exhausted or closed, depending on valve
type)
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