Siemens SIMATIC S7 F Manual page 184

Safety
•
The specified I/Os must be checked in the case of the following fail-safe
blocks:
Fail-Safe Block
F_CYC_CO
F_SENDBO, F_RCVBO
F_SENDR, F_RCVR
F_R_R, F_R_BO
F_M_DI8
F_M_DI24
F_M_DO10
F_M_DO8
F_M_AI6
F_M_DI8
F_M_DI24
F_M_DO10
F_M_DO8
F_M_AI6
F_M_AI6
F_CH_DI,
F_CH_DO, F_CH_AI
F_LIM_HL
F_LIM_LL
F_RS_FF
F_SR_FF
F_CTUD
Switched output parameters are marked with an asterisk (*) on the printout.
Checking the Signatures
Overall signature: After the program has been downloaded to the CPU (see the
sections entitled "Downloading the Whole Safety Program" and "Downloading
Changes"), you have to compare the overall signature of the program in the CPU
with the overall signature in the accepted printout. In the case of S7 FH systems,
you have to make this comparison for both CPUs.
Signatures and initial-value signatures of the F-Blocks: The signatures and
initial-value signatures of all the fail-safe blocks must be identical with those in
Annex 1 of the certificate report. When you use newly created F-Block types, you
must carry out this comparison for all the F-Blocks called in the F-Block type.
7-18
I/O
MAX_CYC
TIMEOUT
TIMEOUT
TIMEOUT
LADDR
LADDR_R
MODE_00 to MODE_05
ACK_NEC
QH
QL
Q
Q
CV
Description
Maximum permissible
F cycle time
Monitoring time during
communication between F-
CPUs
Monitoring time during
communication between F-
run-time groups
Monitoring time for
PROFIsafe communication
with F-I/O
Logical address of the
module (SM1)
Logical address of the
redundant module (SM2)
Measurement range coding
in the case of an analog
input module
Acknowledgment required
for reintegration
1: Upper limit violated
1: Lower limit violated
Output
Output
Current count value
Fail-Safe Systems
A5E00085588-03