Safety Integrated - Industry - Siemens

Ex. No.
4
Safe Monitoring of Drive Functions
SIMOTION D/ SIMATIC S7-F
Overview
Concept
Our objective is to introduce a safety concept comprising the
SIMOTION D motion controller, a sin/cos encoder equipped
with encoder module SMx20 and a fail-safe SIMATIC S7-F controller,
which has been designed to implement the following
safety functions using an encoder system:
■ Safe standstill
■ Safely limited speed
■ Safe operating stop (standstill monitoring)
■ Safe shutdown (via Stop categories)
Safety concept
SIMOTION D:
Drive function
monitoring OFF3
(rapid stop) selected
internally in the event of
an error or when the
limit threshold is violated
PROFIsafe: sign of life, CRC,
communication time
monitoring
DP MASTER
436 Function Example No. MC-FE-I-004-V11-EN
S
PROFIBUS with secure data transmission
SH selected via
terminal
In this concept, the Simatic F-CPU controller - equipped
with the function block "F_DRIVE" certified according to
DIN EN 954-1 and IEC 61508 - monitors the above-mentioned
drive functions and activates the "Safe standstill" (SH) resp.
Safe Torque Off (STO) safety function in the drive each time
that a monitoring threshold is violated in order to bring the
drive into a safe state.
“Safe” actual encoder
value (redundant
coarse position)
DRIVE-CLiQ
“Safe” actual encoder
value (redundant
coarse position)
S
DP Slave
SIMATIC (z.B. IM151-7 F-CPU):
Applicative evaluation:
protective doors, EM. Stop
Safe drive function
monitoring SH is
triggered in the event of an
error or when the limit
threshold is violated
Protective doors
Emergency stop button
Valves
etc.