Monitoring and Response Times of F-Systems
A.3 F-Related Monitoring Times for S7 Distributed Safety
Safety Engineering in SIMATIC S7
A-6
System Manual, 04/2006, A5E00109529-05
See also
Minimum Monitoring Time for F-Cycle Time (Page A-4)
Minimum Monitoring Time for Safety-Related Communication between F-CPU and F-I/O
(Page A-11)
A.3.3
Minimum Monitoring Time for Safety-Related Master-Master Communication
TIMEOUT Parameter in F_SENDDP and F_RCVDP
Time monitoring takes place in F-application blocks F_SENDDP and F_RCVDP using the
same monitoring time, which must be assigned in both F-application blocks (TIMEOUT
parameter).
To ensure that monitoring does not respond when no faults are present, the selected
TIMEOUT monitoring time must be sufficiently large.
TIMEOUT > T CI,F_ T CI,F 2 ☓ TDP_DLY,F_ 2 ☓
TDP_DLY,F 2 ☓ TTR,F 2 ☓ TTR,F 2 ☓ TCOPY
Definition of Times
Time
Definition
Reference
TCI,F_SENDDP
Maximum cycle time of the OB with
the call of F_SENDDP
"Minimum Monitoring Time for F-
Cycle Time"
TCI,F_RCVDP
Maximum cycle time of the OB with
the call of F_RCVDP
"Minimum Monitoring Time for F-
Cycle Time"
TDP_DLY,F_SENDDP Additional DP time delay of a
PROFIBUS CP (communications
processor) on the side of F_SENDDP
In
HW Config
: Object properties for
CP, "Operating Mode" tab
TDP_DLY,F_RCVDP
Additional DP time delay of a
PROFIBUS CP (communications
processor) on the side of F_RCVDP
Object properties for CP, "Operating
Mode" tab in
HW Config
TTR,F_SENDDP
Maximum target rotation time for the
DP master system on the side of
F_SENDDP
In
HW Config
: Object properties
for DP master system, Bus
parameters
TTR,F_RCVDP
Maximum target rotation time for the
DP master system on the side of
F_RCVDP
In
HW Config
: Object properties
for DP master system, Bus
parameters
TCOPY
Maximum copying time within the
DP/DP coupler
On the Internet at:
http://www4.ad.siemens.de/view/cs/
en/8610397
See also
