Safety Integrated - Industry - Siemens

Network 10
In this network, the time delay is assigned to a variable Q1,
which in the last network determines the triggering a collective
error N_ERROR.
Network 11
Operating mode "safe speed" (SG) active at EN_SG=1. SG is
only possible
■ from standstill (#SSTILL=1)
■ at set operating mode switch REQ_SG=1
■ if dead man switch remains DMS remains pressed
■ the plausibility check agrees with the actual speed value
■ if contactor K2 reports no readback error
Networks 12-13
The value of the actual speed value (N_PB_POS) determined
with PROFIBUS and the actual speed value determined with
the count module of ET 200S (N_COUNT) must not exceed the
defined speed value f#or safe speed N_SG. A (parameterizable)
tolerance value N_SG_TOL is added to the N_SG value
(NW 12). The resulting value MAX_SG switches the drive off
safely when exceeded (N_ERR4 in NW 13).
Network 14
The constellation OUT1=0 (is no standard requirement) and
SSTILL=0 (drive spins) can occur in two occasions:
■ During operational stop (drive shutdown)
■ In case of an error (e.g. load causes spinning movement)
In case of an error a spinning movement of the drive detected
in "safe speed" (SG) mode causes a safe drive shutdown.
Note
An undesired electrical startup of the drive is in "safe
speed" (SG) mode prevented with the K80 option by
switching off the power supply for controlling the
power transistors (IGBTs) during standstill (pulse blocking).
More detailed information is available in the description
of the FB1.
Functional Example No. AS-FE-I-012-V10-EN 391
Ex. No.
12