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SE, Start element
463
02/16 MN05013001Z EN
Error detection and acknowledgement
If the function block detects on activation that the coils I1
and RE are already activated, it prevents the automatic start.
General information on Errors and how easySafety reacts to
them, is provided in the section “Diagnostics using the ER
contact” on page 622.
Example
Safe Start enable if the marker contact MS03 is closed and
the external Reset button S1 (connected at the device input
IS2). The Start enable should only be initiated when the
Reset button is released and is retained until the MS03
marker contact is closed. The Start enable is assigned to the
marker coil MS10 for further processing.
The circuit diagram in easySafety only has three rungs:
Figure 237:
Example of Start element circuit diagram in
easySafety
The safety marker MS03 is associated with the function
block coil SE011 and the Reset coil SE01RE with the device
terminal IS2. The enable contact SE01QS of the function
block switches the marker MS10 directly.
The enable parameter stays in the default setting, the mode
is set to CST (Controlled Start).
The signal diagram of the function block for this application
shows the dependence of the enable contact SE01QS on the
status of coil SE01I1 and SE01RE:
Error
Error acknowledge-
ment
I1 and RE are on when the func-
tion block is activated
Dropping out of I1 and RE
MS03---------------------------
Ä
SE01I1
IS02---------------------------
Ä
SE01RE
SE01QS-------------------------
Ä
MS10
SE01 NEN CST *
*** ***
Содержание easySafety
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