9
05.01
9.7 Circuit examples =1 to =10 with SIMODRIVE 611 analog
9-269
Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
Circuit example =2 “Powering up/powering down/
stopping drives in an emergency”
Application
Drive group comprising an NE module, three FD modules 611 A, control modu-
les with standard interface and analog–setpoint interface for 1FT5 motors. This
circuit concept can, e.g. be used for simple drive controls. When the drives are
powered up and powered down, the complete drive group is switched through
two channels in a safety–related fashion using line contactors and start inhibits.
Functions
Drives on
S Key–actuated switch–S21, control on.
The power–off circuit in front of the EMERGENCY STOP safety switching de-
vice –K21 must be closed by the following conditions:
S Contactor –K25 energized, NE module ready. (ready conditions, NE module,
refer to Section 9.2.2!) When the control is switched–on, the ready signal is
still not present. This means that the PLC output A25 must be set to “1” via
the PLC logic so that the power–off circuit is closed through contactor K25.
After the group has been powered up via contactor –K21, if there is no fault
message, the ready signal is received via PLC input E11. The ready monito-
ring is in the power–off circuit now becomes active through the PLC logic.
The feedback circuit from contactor –K25 is now monitored through PLC–
E25.
S Contact =A1–A25/1–2 NC ready at the NC control must have switched.
S Interlocking circuit, terminal 35–36 closed.
S Feedback circuit, contactor –K21 is closed:
The line contactor, the start inhibits and contactor –K27 for the brake control
are monitored to ensure that they are in the safe off condition at power–up
cycle. When required, safety–relevant functions associated with the user–
side machine control can also be incoroprated in the feedback circuit
S Pushbutton –S23, drives on
Contactor –K21 is energized and latches. The drive group is powered up. After
the DC link has been pre–charged, the line contactor in the NE module is ener-
gized. The ready signal is received as long as there is no fault message.
NC program, start/stop
S Pushbutton –S29/–S28
The axis–specific controller enable signals are activated using pushbutton
–S29 NC–program start – and the NC machining program is started. The
drives are brought to a controlled standstill at the end of the program or
using the pushbutton –S28 stop.
9 Important Circuit Information
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