Siemens SIMATIC S7-400H Manual page 289

Table 13-1 Run times of the blocks for redundant I/O, continued
Block
FB 452 RED_DIAG
FB 453 RED_STATUS
Notice
These are typical and not absolute values. The actual value may deviate from
these specifications in some cases. This overview is intended as a guide and
should help you estimate how the use of the RED_IO library may change the cycle
time.
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Run time in single/single mode
m
Invoked in OB 72: 160 s
Invoked in OB82, 83, 85:
m m
250 s + 5 s / configured module
pairs
The run time of FB RED_DIAG is
always increased by addresses which
are not located at the beginning of the
DB.
If these are interrupt trigger addresses
that do not belong to the redundant
I/O, the run time may increase up to
approx. 1.5 s. This is the case when
m
the working DB is 60 Kb or larger.
m m
160 s + 4 s / configured module
pairs
The run time depends on the (random)
position of the module being searched
for in the working DB.
When a module address is not
redundant, the entire working DB is
searched. This results in the longest
run time of FB RED_STATUS.
Maximum run time = 160
configured module pairs * total
number of module pairs)
The number of module pairs is based
either on all inputs (DI/AI) or all outputs
(DO/AO).
Run time in redundant mode
Invoked in OB 72: 360
Invoked in OB82, 83, 85:
m
430 s (basic load) + 6
module pairs
The run time of FB RED_DIAG is
always increased by addresses which
are not located at the beginning of the
DB.
If these are interrupt trigger addresses
that do not belong to the redundant
I/O, the run time may increase up to
approx. 1.5
the working DB is 60 Kb or larger.
m
350 s + 5
pairs
The run time depends on the (random)
position of the module being searched
for in the working DB.
When a module address is not
redundant, the entire working DB is
searched. This results in the longest
run time of FB RED_STATUS.
m m
s + 4 s/ Maximum run time = 350
configured module pairs * total
number of module pairs)
The number of module pairs is based
either on all inputs (DI/AI) or all outputs
(DO/AO).
Technical Specifications
m
s
m
s / configured
s. This is the case when
m
m
s / configured module
m m
s + 5 s/
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