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EM, feedback circuit-
monitoring
355
02/16 MN05013001Z EN
Operation of the function block
Precondition: The Manual Start (MST) operating mode is set.
The picking up of function block coil EM..OC activates the
monitoring function and the enable contact closes after the
Reset coil EM..RE picks up.
• If the actuator is switched on, the easySafety checks
whether the feedback loop at the EM..FL coil opens within
the monitoring time.
• If the actuator is switched off, the easySafety checks
whether the feedback circuit at the EM..FL coil closes
within the monitoring time.
If the actuator indicates a change in its switch position
within the monitoring time, the enable contact EM..QS stays
closed and enables operation.
If the feedback signal of the switch position is not generated
or outside of the monitoring time, the enable is removed and
the enable contact EM..QS opens. Any further enable is not
generated before the function block is reset at EM..RE.
Error detection and acknowledgement
Precondition: The Manual Start (MST) operating mode is set.
The feedback loop function block detects the timing out of
the monitoring time.
General information on Errors and how the easySafety reacts
to them is provided in section “Diagnostics using the ER
contact” on page 622.
Error
Error acknowl-
edgement
Monitoring time FT timed out
EM..RE picks up
Содержание easySafety
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