Installation
3.1.4
“
Safe standstill
”
function
The
“
Safe standstill
“
function is activated by pressing the key
“
S1
“
(OFF):
•
Opening the NO contact of K3 (t3) via terminal E1 or E2 at X5 immediately triggers a quick
stop (QSP) at the controller.
•
The motor is decelerated to standstill (t4) by the controller with t
QSP
along the QSP ramp.
–
the external pulse inhibit is activated with delay (t5) in the controller (terminal 34, X11) after
the time set in time relay K2a.
–
opening the NO contact of K2b enables the controller again (t5).
The external pulse inhibit of the controller (safety relay K
SR
) ensures that the motor cannot start
unexpectedly if the safety doors are opened.
3.1.5
“
Emergency off
”
function
If
“
S3
”
(EMERGENCY STOP) is pressed, the drive will be braked to a controlled standstill according
to stop category 1 of EN 60204-1:
•
The Quick Stop input (QSP) is set immediately at the controller by opening the NO contact of
K3 (t3) via terminal E1 or E3 at the controller.
•
The controller brakes with t
QSP
until the motor is brought to a controlled standstill (t4).
•
The mains contactor (K4) safely disconnects the controller (A3) from the power supply with a
delay (t
A1
) if
–
the external pulse inhibit (safety relay K
SR
, terminal 34, plug X11) is set with a time delay
through the normally open contact of K2a (t5),
–
the controller is enabled again via the NO contact of K2b at terminal 28 at the same time
(t5).
The feedback contact of K4 prevents the switching of the enable contacts at the emergency off unit
(A1) when the power supply is switched on again if the switching contacts
’
stick
’
.
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