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Configuration
4.4 S7 Distributed Safety
Inputs
Parameters
QBAD
ACK_REQ
S7_MP_RES
S7_ACK_ERR
MP_DATA
MP_RNG
MP_STAT
Outputs
Parameter
ACK_REI
MP_DATA_Q
MP_RNG_Q
64
Data type
Description
Bool
QBAD indicates if the F-I/O has been
passivated.
Bool
Acknowledgement required
After a communication error, the fail-safe
system sets QBAD = 1 and ACK_REQ = 0.
ACK_REQ = 1 indicates that the PROFIsafe
message frames are being exchanged again.
Bool
This input is set so that the F-CPU resets the
status of F_FB_MP to its "original state", i.e.:
The HMI device has the status "removed"
•
If a rampdown or shutdown was set, it is
•
reset.
If the HMI device was logged on to an
•
effective range, it is enabled again.
The input is only evaluated if Q_BAD = 1.
Setting the input S7_MP_RES is necessary if
the HMI device cannot return itself to a
defined state, for example when a system
error occurs or the battery is dead.
Bool
Communication errors may not be
acknowledged automatically.
This input is set to have the F-CPU to
acknowledge a communication error during
ongoing PROFIsafe communication.
F_FB_MP only reacts to a rising edge.
Word
User data of the fail-safe process image's
inputs
Word
ID of the effective range in which the HMI is
included.
Word
Data are exchanged through F_DB_STATES
to F_FB_RNG_n via this input/output.
Data type
Description
Bool
Acknowledgement for reintegration
The automatic reintegration is regulated via
the F-I/O DB through this output.
Word
User data of the fail-safe process image's
inputs:
Word
The effective range ID is transmitted to the
HMI device through this output.
Interconnection
F-I/O DB:
DBx2.1 = QBAD
F-I/O DB:
DBx2.2 = ACK_REQ
Must be specifically
interconnected for
plant.
The security program
must ensure that after
S7_MP_RES is set,
automatic restart of
the plant is not
possible. The operator
must strictly ensure
that he executes a
separate operator
action to commence
the restart.
Must be specifically
interconnected for
plant.
PII:
Word 1 = MP_DATA
PII:
Word 2 = MP_RNG
F_DB_STATES
Interconnection
F-I/O DB:
DBx0.2 = ACK_REI
PIO:
Word 1 = MP_DATA
PIO:
Word 2 = MP_RNG
Fail-safe operation of the Mobile Panel 277F IWLAN
Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
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