Safety Integrated - Industry - Siemens

Ex. No.
12 Flowchart
The flowchart below illustrates the functional relations.
"Check of plausibility OK?" in the flowchart involves:
■ checking whether the actual speed value does not exceed
a fixed speed value N_MAX.
■ checking whether the actual speed value determined with
PROFIBUS and the actual speed value determined with the
ET 200S count module are equal.
If both points can be answered with "YES", then the plausibility
check is "OK". For "NO" and "safe speed" mode, the drive is
switched off safely.
Time sequence for different modes
The following time diagrams show the time sequence during:
■ Operational start and shutdown of the drive
■ Emergency stop
■ Operating mode "safe speed" (SG)
Before, the displayed parameters are explained. The names of
the signals correspond to the ones of the S7 program code.
368 Functional Example No. AS-FE-I-012-V10-EN
Symbol Function Convention
ACK Acknowledgement Acknowledgement depending
on edge evaluation
START Start request 1: Start request
STOP Stop request 0: Stop request
ESTP Emergency Stop 0: Activated emergency
stop
SIM_FDOR Simulated safety door 0: Opened safety door
DMS Dead man switch 1: DMS pressed
OUT3 Parameter
MASTERDRIVES
0: Fast stop
K80 Contactor for control- 1: Safety relay of K80
ling the option K80 option is controlled
K2 Line contactor 1: activated
n Speed list value
Operational start and shutdown of the drive
Time Explanation
t1 Acknowledgement required prior to first start obligatory.
t2 Drive is started via START.
t3 Drive is stopped via STOP.
t4 Drive standstill