Safety Integrated - Industry - Siemens

Ex. No.
12 S7 program of DP Slave
Standard user program of the DP Slave CPU
(IM 151-7F-CP)
OB 1
The networks of OB1 of the F-CPU describe the address transfer
area to provide necessary information to the master CPU.
Timed alarm (OB 35):
In OB 35 the program for the count module of ET 200S is
called up:
The count module receives pulses from the SBM2 module of
MASTERDRIVES. OB 35 forms the interface for the S7 program
by evaluating these pulses. The variable N_SBM2 delivers the
actual speed value which in the F-program is used for standstill
detection of the drive. The speed value determined by the
count module is always displayed as a positive value.
Furthermore, the OB35 calls the F-runtime group (F-CALL).
F-program of the DP Slave (IM 151-7F-CP)
F-CALL (FC 1)
The F-runtime group F-CALL (FC 1) is called from the cyclic interrupt
OB (OB 35). From here, the FC "COORDINATION" (FC 2)
is processed first.
FC "COORDINATION" (FC 2)
The FC2 successively processes the following F-blocks:
■ FB "STANDSTILL_AND_SAFETY_V" (FB 2, DB 2)
■ FB "EMSTP_AND_FDOOR" (FB 1, DB 1)
■ FC "REINT" (FC 10)
FB "STANDSTILL_AND_SAFETY_V" (FB 2, DB 2)
Tasks of the FB "STANDSTILL_AND_SAFETY_V" (FB 2, DB 2)
■ Standstill detection
■ Enable operating mode "safe speed" (SG)
■ Perform plausibility check of the determined actual speed
values (via PROFIBUS and count module of the ET 200S).
388 Functional Example No. AS-FE-I-012-V10-EN