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Safety function blocks
366
02/16 MN05013001Z EN
Operation of the function block
The safety function of the function block is based on the
following contact mirror variants of the enable switch:
Figure 181:
Contacting of the enable switch with three stages
0, 1, 2 and two contacts A, B
These allow the enable to be initiated as soon as the func-
tion block coil EN..SA activates the monitoring and the
enable switch is in position 0.
Pressing the enable switch to position 1 closes the enable
contact EN..QS.
Position 2 (panic position, for example caused by clenching
of the hand) removes the enable and opens EN..QS.
The enable contact stays open when switch position 0 is
restored, also when passing through switch position 1.
Error detection and acknowledgement
The enable switch function block detects the timing out of
the enable 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 acknowledgement
Wire break or interruption of
the activation of EN..I1 and
EN..I2.
Return of the enable switch to
position 0.
Timing out of the enable time
ED.
Return of the enable switch to
position 0.
A
B
0
1
2
Содержание easySafety
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