9
02.98
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Siemens AG 1998 All Rights reserved 6SN1197–0AA00 02.98 Edition
SIMODRIVE 611 (PJ)
Use and mode of operation of setting–up operation
The controlled infeed modules (I/R modules) have, in the control to the step–up
controller–/regenerative feedback power section, a step–up controller start inhi-
bit. This operates in the same fashion as the drive start inhibit (refer to Sections
pp. 1-143, 1-144). When selected via terminal 112, the diode converter is exclusi-
vely effective in a B6 circuit configuration. The DC link voltage is proportional to
the voltage connected at terminals U1, V1 W1.
Corresponding to the reduced infeed voltages through the transformer, lower
DC link voltages are obtained, which in turn influence the maximum possible
motor terminal voltage.
Based on the DC link voltage reduction, setting–up operation can only be
implemented using 1FT5 motors and square–wave current control.
A risk evaluation must ensure, that no inadmissibly high motor speeds are pos-
sible in the setting–up mode due to energy fed back from parallel drives into the
DC link. In this case, for example, vertical drives without self–locking mechani-
cal system have to be investigated, which, when a fault occurs, could increase
the DC link voltage above the permissible setting–up voltage as a result of the
regenerative operation if the axis for instance was too fall. When the setting–up
mode is selected, if there is a connection between P500/M500 to the power DC
link P600/M600, then this must be reliably interrupted through contacts (refer to
below section, "Sequence and Procedure..."). The comments on p. 1-148 must
be observed when engineering the system.
Sequence and procedure when using the start inhibit
The drives must be shutdown before terminal 663 is energized, which initia-
tes the start inhibit.
The speed setpoint input can be externally disconnected and zero speed
setpoint input entered as an additional safety function.
If a fault condition occurs, all drives, machine, system, must be shutdown
and disconnected.
In order that the power DC link is reliably isolated from the supply, it should
be ensured that all connections in parallel to the power infeed are electrically
isolated through switching contacts. In this case, if necessary, the possible
user–specific external connection between the electronics power supply and
power DC link must be taken into account. In order to shut down the drive in
a controlled fashion when the power fails, utilizing the energy stored in the
DC link, a connection can be established, for instance, between terminals
P500/M500 and P600/M600.
This connection between the electronics power supply and the power DC
link must be safely and reliably isolated and remain isolated as otherwise
the power DC link could be charged–up through the auxiliary DC link of the
electronics power supply. The connection between the power supply and
the power DC link is not permissible in the setting–up mode.
When using a monitoring module which is connected to the power DC link
via P500/M500 and is also connected to the line, when the line contactor is
opened, either the connection between the line and the monitoring module
or the connection between P500/M500 and the power DC link must be di-
sconnected reliably and safely via contacts.
9.5.5 Use and mode of operation of setting–up operation
Содержание SIMODRIVE 611A
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