Safety Integrated - Industry - Siemens

SIMATIC Runtime System
Function Block "F_DRIVE" for safe monitoring of drive functions
The safety-related function block "F_DRIVE" requires the
safety-related Distributed Safety System. The system manual
Safety Engineering in SIMATIC S7" (s. Chapt. 2.2.1) provides a
detailed description of this safety system.
The function block "F_DRIVE" ensures safe monitoring of the
drive functions and establishes safety-related communication
between the SIMOTION/SINAMICS drive system and the failsafe
Simatic CPU. A sin/cos encoder has to be connected to the
SMx20 module issuing signals that will be evaluated.
In the event of an error, safe drive standstill is activated via a
F-DO thus bringing the drive into a safe operational state.
The following safety functions can be implemented depending
on the relevant application:
■ Safe standstill
■ Safe shutdown
■ Safe operating stop
■ Safely limited speed
Caution
Before inserting the fail-safe application block FB300
"F_DRIVE", you have to copy the fail-safe blocks FB186
"F_TOF", FC174 "F_SHL_W" and FC176 "F_BO_W" from
the block container F-Application Blocks of the fail-safe
Distributed Safety library (V1) into the block container
of your S7 program (if not already done).
The blocks must be assigned the above-mentioned
numbers and may not be renumbered.
Caution
The block functions are only ensured by setting the relevant
parameters in the hardware configuration.
Caution
A function test is required to check the block functions.
Notice
The fail-safe monitoring time and the fail-safe mode of
the module are described analogously to the manual
"Safety Engineering in SIMATIC S7 System Description"!
Note
The constants "VKE0" and "VKE1" must be used in the
program block through fully qualified access to
"F_GLOBDB". "VKE0" is reproduced by
"F_GLOBDB".VKE0, "VKE1" by "F_GLOBDB".VKE1.
They are used to permanently connect the inputs of
the function block and may not be modified by the
safety program.
Function Example No. MC-FE-I-004-V11-EN 449
Ex. No.
4