Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 288

05.08
05.01
S
Drives, start (drive modules)
S
S
S
NC program, start/stop
S
Stop drives
S
S
S
Start inhibit monitoring function
The start inhibit monitoring function for terminals 37–38 is effective in the
EMERGENCY STOP circuit of contactor –K21. Normally, when the drives stop,
the NC contacts AS1–AS2 of the start inhibit relays in the drive modules must
always be closed before the NO contact of contactors –K33 and –K36 open. In
order to realize this, the coils of these contactors must be equipped with a diode
to extend the contactor drop–out delay. If the start inhibit function is incorrect,
the monitoring circuit opens, EMERGENCY STOP contactor –K21 drops out
and shuts down the complete drive group through the line contactor. The start
inhibits are actively monitored in a cyclic manner after every stop operation.
© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
8.7 Circuit examples =1 to =9 with SIMODRIVE 611
Pushbutton –S23, drives on
Contactor –K21 closes and latches. Initially, only the NE module is powered
up. After the DC link pre–charging has been completed, the line contactor is
closed. The ready signal is issued as long as there is no fault signal at the
NE module and at the FD modules (switch, ready/fault signal is set to fault
signal).
The NE module must be powered up. The stop circuit in front of safety relay
–K31 must be closed. The interlocking circuits of the following expansions of
circuit =5 are jumpered.
Using pushbutton –S32 – drives, start (monitored start) – with the feedback
circuit closed, safety relay –K31 with expansion device –K32 and contactors
–K35, –K33, –K36 are closed and latch.
Simultaneously, terminal 63 central pulse enable, terminal 64 "drive enable"
at the NE module and terminal 663 "pulse enables " for the drive modules
are energized and therefore the start inhibit functions are withdrawn.
Pushbutton –S29/–S28
The axis–specific controller enable signals are activated and the machining
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.
Using the two–channel pushbutton –S31, drives stop – the drives are
braked and stopped as quickly as possible at the selected current limit of the
drive modules if these have not already been stopped by the NC program.
Terminal 64 – drive enable – is de–energized by the instantaneous contact
of contactor –K31. After the drives have come to a standstill, terminal 663 is
inhibited and the start inhibit functions become active via the off delay con-
tacts of the safety relays –K32 and –K35.
The shutdown times are adapted to the various braking times of the MSD
and FD drives and must safely overlap these from a time perspective, e.g.
MSD 5 s; FD 0.5 s.
8 Important Circuit Information
8-287
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