Safety Integrated - Industry - Siemens

Settings of the fail-safe F-DO
The settings are displayed after double-clicking "4 F-DO
DC24V/2A" (see "Overview picture").
DIL switch settings
This value has to be set on the module (F-DO).
F monitoring time
It has to be observed that the F monitoring time must be
larger than the call time of OB 35.
Activate used channels, deactivate channels which are not
used. The indicator light ACTUATOR has been connected to
channel 0.
The read-back time defines the duration of the switch-off procedure
for the respective channel. If the respective channel
switches high capacity loads, the read back time should be set
sufficiently large. We recommend setting the read back time
as small as possible, however large enough so that the output
channel does not become passive.
Settings of the LS4
Select the LS4 and then double-click the line which appears
(see following figure):
Click the PROFIsafe tab.
Mark first...
...then doubleclick
this line
F_Dest_Add:
This value always results from the PROPIBUS address (here: 4)
plus 500
F_WD_Time:
The default value of 10 ms is usually too small.
A valid current safety frame must be received from the F-CPU
within the watchdog time period. Otherwise, the DP standard
slave goes to the safe state.
The selected watchdog time should be long enough to tolerate
frame delays in communication, but also short enough for
your process to run without interference.
Functional Example No. AS-FE-I-010-V11-EN 309
Ex. No.
10