9
05.01
9.7 Circuit examples =1 to =10 with SIMODRIVE 611 analog
9-276
Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
Functions
Request protective door release
The drives must first be shut down using pushbutton =4–S31 drive stop or op-
tionally, e.g. at the end of the NC program by the output of an NC auxiliary func-
tion, PLC–A18 controls contactor –K18.
The protective door release is requested using pushbutton –S15. Contactor
–K15 pulls in, logically combined using the PLC logic, if the drives are shut
down and powered down, e.g. contactors =4–K33 and =4–K36 are de–energi-
zed. PLC logic: PLC–A15 = “1”, if =4–E33 and =4–E36 = “0” signal. When ex-
panded using an external MSD speed monitoring, circuit =7, the PLC logic must
be adapted: PLC–A15 = “1”, if =4–E36 = ”0” and =7–E11 = “1” signal.
With the protective door release request, in the secured working zone of the
machine, all of the hazardous motion and other potential hazards associated
with the user’s machine control must be shutdown. Finally, shutdown must be
made in a safety–related fashion via the released or opened protective door.
Protective door release
The protective door is released via contactor –K16 if the following conditions are
fulfilled:
S Contactor –K15 is energized
S Drives, delayed stop, contactors =4–K33 and =4–K36 de–energized
S MSD standstill signal n act < n min via relay =4–K11.
S Interlocking circuit on the user side closed via terminals 601–602.
Optional:
S External standstill monitoring via terminals 77–78 closed.
The interlocking solenoid of the door position switch –S11 is energized and the
safety switching device –K11 and contactors –K13/–K14 de–energized via the
position monitoring of the solenoids. The drives are shut down in a safety–rela-
ted fashion through two channels via interlocking circuit terminals
611–612/613–614. The protective door is initially released but is still closed,
relay –K17 energized. This means that non–hazardous partial–functions of the
user–side machine control can still be executed via the PLC.
Opening the protective door
By opening the protective door, the protective door safety circuit is opened via
the actuator of the door position switch –S11 in parallel to position monitoring of
the solenoids.
Closing the protective door
The protective door must be closed. The contactors –K15/–K16 are de–energi-
zed and the protective door is interlocked again via pushbutton –S16 interlock
protective door. The interlocking circuit is re–closed via terminals
611–612/613–614 which means that in the selected automatic mode, the drives
can be re–released using pushbutton =4–S32 start.
For protective doors, which are only seldomly opened, we recommend that the
control is adapted so that before the drives are powered up, the correct functio-
ning of the position switch is checked by opening and closing the door again.
9 Important Circuit Information
To Next Page
Loading...
Need help?
General
