Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 261

8 Important Circuit Information
8.5 Start inhibit in the drive modules/safe standstill
8.5.7 Example, "safe standstill" for several drive groups
Function
8-260
The concept of the "safe standstill" function with higher–level main contactor as
shown in Fig. 8-10 is implemented on an electrical injection molding machine.
a
Enable
Protective door A
Protective door A
Protective door B
Protective door B
Main contactor
Fig. 8-10 Example, "safe standstill" function with several drive groups
The machine comprises three functional drive groups. The feedback signal con-
tacts of each control unit AS1/AS2 within a drive group are connected in series.
Every drive group is secured using a moving protective device. Interdependen-
cies according to Table 8-2 apply between the drive groups and moving protec-
tive devices.
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
b
c
For a protective device with tumbler mechanism:
a
An enable signal is issued, if n=0, and
simultaneously inhibit the pulses via
the control unit
Instantaneous contact at the
b
start inhibit, terminal 663
Delayed contact at the
c
interlocking logic
AS1
Drive 1.1
AS2
AS1
Drive 1.2
1
AS2
AS1
Drive 1.3
AS2
Moving protective device
AS1
Drive 2.1
AS2
2
AS1
Drive 2.2
AS2
AS1
Drive 3.1
3
AS2
EN+
48 Start
Line supply infeed NE
© Siemens AG 2012 All Rights Reserved
02.03
05.01
1 2 3