Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 285

8 Important Circuit Information
8.7 Circuit examples =1 to =9 with SIMODRIVE 611
Application
Functions
8-284
Circuit example =2 "Drives on/off/stopping in an
emergency"
Drive group, comprising an NE module, three 611 FD modules with High Stan-
dard control boards. This circuit concept can be used, for example, for basic
drive controls. When the drives are powered up and powered down, the com-
plete drive group, including the line contactor and start inhibit terminals, is
switched in a safety–related fashion through two channels.
Drives On
S
Key–operated switch –S21, control on.
The power–off circuit before the EMERGENCY STOP safety relay –K21 – with
the expansion devices –K22, –K23 – must be switched–in taking into account
the following conditions:
S
Contactor –K25 closes, ready signal from the NE module. (ready conditions,
NE module, refer to Section 6.2.5!) When the control is powered–up, the
ready signal is still not present. This means that the PLC output O25 must
be set to "1" using the PLC logic so that the power–off circuit is closed
through contactor –K25. After the drive group is switched in via the switching
devices –K21, –K22, and –K23, the ready message is issued via PLC input
I11, provided no error messages are pending.. The ready monitoring is now
activated in the power–off circuit by means of the PLC logic.
The feedback circuit from contactor –K25 is monitored using PLC I25.
S
Contact =A1–A25/1–2 NC ready (ready signal) must be switched through to
the NC control.
S
Interlock circuit terminal 35–36 is closed.
S
The expansion devices –K22, –K23, the line contactor, the start inhibit func-
tions/terminals and contactor –K27 for the brake control are now monitored,
at each power–on cycle for the safety–related off switching condition. When
required, safety–relevant functions of the machine control on the user side
can also be incorporated in the feedback circuit.
S
Pushbutton –S23, drives on
Contactors –K21, –K22, –K23 are closed and power–up the drive group.
After the DC link pre–charging has been completed, the line contactor in the
NE module is closed. The ready message is issued as long as there is no
error message present.
NC program, start/stop
S
Pushbutton –S29/–S28
The axis–specific controller enable signals are activated and the NC ma-
chining program is started using pushbutton –S29 NC program start. At the
end of the program or using pushbutton –S28 – stop – the drives are
brought to a controlled standstill.
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
© Siemens AG 2012 All Rights Reserved
02.03
05.01