Siemens SIMATIC S7 FH - F_M_DI8

Fail-Safe Blocks
Fail-Safe Systems
8-58 A5E00085588-03
8.6.2 F_M_DI8
Function
The F module driver reads the digital values and error information of an 8-channel,
fail-safe digital input module and makes the data available to the associated F
channel driver (F_CH_DI).
If there is a redundant module, the digital values of both modules are evaluated.
The F module driver is automatically inserted at the beginning of the run-time
group which also contains the associated F channel driver F_CH_DI. The I/Os of
the F module driver are automatically interconnected and supplied with values.
The outputs DIAG_1 and DIAG_2, at which error information is output, are
important.
I/Os
Name Data Type Explanation Default
Inputs:
CRC_IMP1 WORD CRC via implicit data SM1 Supplied
automatically
CRC_IMP2 WORD CRC via implicit data SM2
(only when RED = 1)
Supplied
automatically
DISC_ON BOOL Carry out discrepancy analysis Supplied
automatically
DISCTIME DINT Discrepancy time in ms Supplied
automatically
TIMEOUT F_DINT Monitoring time in ms for vital-
sign monitoring
Supplied
automatically
SENS_RED F_BOOL 1=1oo2 evaluation of the
sensors
Supplied
automatically
RED F_BOOL Module Redundancy
0: SM configured as non-
redundant
1: SM configured as redundant
Supplied
automatically
LADDR INT Logical address of the module
(SM1)
Supplied
automatically
LADDR_R INT Address of the configured
redundant SM2 module (only
when RED = 1)
Supplied
automatically