Safety Integrated - Industry - Siemens

Ex. No.
1
F-CALL (FC1)
F-CALL (FC1) is the F runtime group and is called from the cyclic
interrupt OB (OB 35). F-CALL calls the F-programe block
(here: FC2).
FC "COORDINATION" (FC2)
For modularity reasons all further failsafe blocks are called
from here.
FB "ESTOP" (FB1, DB1)
The emergency stop is implemented as follows:
#ACK
#N
N
#ESTP
#EN_ESTP
SR
S
R Q
#COND1
#ACTUATOR
=
The signal status of #COND1 is defined in the user program
(see FC 10 or OB 35). #COND1="1" is the first condition for a
start of the "machine" (#ACTUATOR="1"). The second condition
is the acknowledgement required before the start. The
flipflop is set with #ACK="1" (#EN_ESTP="1"). In the standard
user program (FC 10) the static variable #EN_ESTP is read as
bit of the instance DB of FB1 and ensures, that only after acknowledgment
the COND bit (or COND1 in the safety program)
is set there by the start signal.
By pressing the emergency stop button #ESTP becomes ="0"
which sets the flipflop of the output Q back to "0" (resetting
has the priority at this flipflop procedure), which makes #AC-
TUATOR also "0". ("machine" is switched off).
FC "REINTEGRATION" (FC3)
This FC ensures the reintegration of the passivated failsafe
modules (F-DI and/or F-DO). For the F-DO a memory bit REINT
is prepared. With a positive flank of REINT the F-DO will be reintegrated.
A passivation is indicated at the failsafe module
via LED. The reintegration of an F module may take approx.
one minute.
Note
In this example, the reintegration of passivated
modules occurs automatically. Use the automatic reintegration
for your application only if it will not
cause any hazards.
178 Functional Example No. AS-FE-I-001-V10-EN
&
G_FB_XX_081
Operating instructions
The table below will help you during operation.
No. Instruction Result/Note
1 Press the acknowledgement
push button
ACK and release it.
–
2 Press the push button
for START instruction
and release it.
3 Press the emergency
stop push button.
4 Unlock emergency
stop push button.
Indicator light goes on
("machine" active).
Indicator light goes off. The output of
the failsafe digital output module is
reset.
Perform action 1.