Safety Integrated - Industry - Siemens

Explanations for the STEP 7 program
Interaction of STEP 7 blocks
The following figure displays the interaction between the
STEP 7 blocks and the connection to the process I/O. The description
of the process signals is available at page 321.
Program Block Name Tasks
Standard program OB1 --- Cyclic program: Call of FB1 (START)
OB35 --- Periodic call of F-runtime group (FCALL)
FB1 START Operational switching:
Generating the start requirement (REQ_START)
Safety program FCALL FCALL F run-time group (FCALL)
F-PB COORDINATION F-program block:
Calls FB2 and FB3
FB2 MODE Call FB215 (F_ESTOP1):
Controlling ACTUATOR and TEST
FB3 REINTEGRATION Display passivation, automatic F-DI reintegration, manual F-DI
and F-DO reintegration,
FB215 F_ESTOP1 F-block from Distributed Safety library:
"Emergency stop up to stop category 1"
Creating ENABLE for emergency stop circuit
Functional Example No. AS-FE-I-011-V10-EN 335
Ex. No.
11