Drive Switch Off / Stop - TDE MACNO MINIOPD EXP User Manual

5.3.3 DRIVE SWITCH OFF / STOP

By default, the drive switch off instantaneously as soon as one of the switch on functions is disabled
(immediate shutdown); that may also cause an almost immediate rotation shutdown, if the motor is
loaded and the inertia is low, while coasting if the motor is without load and mechanical inertia is high.
Using the connection C28, it is possible to choose to switch off the drive only with motor at minimum
speed. With C28=1, 0=immediate switch off by default, when SWITCH ON/RUN function is disable,
the speed reference is brought to zero, thus the motor starts to slowdown following the ramp (the
drive is still switched on). The system is switched off /STOP (offline) only once the motor absolute
speed goes below the threshold set in P50 (2.0% default), that is when the motor is almost
motionless (shutdown for minimum speed).
Calibrating P50 may coincide the drive block with the motionless motor. The state of speed above
the minimum is signaled from the logical output function o.L.2, moreover the output function o.L.16 is
available, that signals the drive speed (absolute value) is above the threshold speed level P47. In
every way, whichever is the chosen type of shutdown, there is an immediate drive block in presence
of any alarm condition, oL.0 = L.
5.3.4 SAFETY STOP
The OPEN drive converters have the possibility to give the separated IGBT supply. This supply
voltage can be see like safety STOP input and there are two different managements for this input,
selectable with C73 connection:
For OPEN DRIVE versions with Safe Torque Off safety function (STO) according to EN 61800-
5-2 and EN 13849-1 see STO installation manual
5.3.4.1 MACHINE SAFETY (C73=0)
Setting C73=0 (default) the Safety STOP is compatible with EN945-1 specification against accidental
starts. When this input is at low logical level the IGBT power bridge isn't supplied and the motor
couldn't run more than 180°/motor poles couple for brushless motor (for asynchronous motors the
movement is zero), also if there is a brake in the power bridge.
The converter signals this state with the alarm A13.1, the output o17 "Power electronic not
supplied" goes at high level, the output o0 "Drive ready" goes at low level and the Power Soft start
command is taken off.
To recover the normal converter state, follow this steps:
Give +24V to the IGBT driver supply input (Safety STOP). At this point the converter
goes at low level the output o17 "Power electronic not supplied".
Reset the converter alarms for eliminate the alarm A13.The normal converter state is
recovered.
After 500ms the converter is able to start the Soft start sequence
5.3.4.2 POWER PART ENABLE INPUT (C73=1)
Setting C73=1 the Safety STOP is like a Power part enable input. Like in the preceding case,
when this input is at low logical level the IGBT power bridge isn't supplied and the motor couldn't run
more than 180°/motor poles couple for brushless motor (for asynchronous motors the movement is
zero), also if there is a brake in the power bridge.
The converter signals this state with the output o17 "Power electronic not supplied" that goes at
high level, the Power Soft start command is taken off, but unlike before no alarms goes at active
state. To recover the normal converter state, follow this steps:
Give +24V to the IGBT driver supply input (Safety STOP). At this point the converter
goes at low level the output o17 "Power electronic not supplied".
After 500ms the converter is able to start the Soft start sequence
In this case it isn't necessary to reset the alarms after take back at high level the Safety STOP input,
it will be sufficient to wait 500ms + soft start time, after that the converter could be goes on run.
User's manual
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