Block Numbers And Signatures; Integration In Cyclic Interrupts - Obs - Siemens Simatic Manual

Fail-safe function blocks for storage and retrieval machines
3.1.4

Block numbers and signatures

Block
Block name
number
FB
F_SAFE_POS
200
FB
F_SLP_MONITOR
201
FB
F_BRAKE_TEST
203
FB
F_LOAD_MONITOR
204
FB
F_SBR_MONITOR
207
FB
F_SCALE_DINT
208
FB
F_ENDZONE_DB16000
210
FB
F_ENDZONE_DB15999
211
FB
F_ENDZONE_DB15998
212
FB
F_ENDZONE_DB511
213
FB
F_ENDZONE_DB510
214
FB
F_ENDZONE_DB509
215
FC
F_MIN_MAX
206
FC
SCALE_DINT
208
Figure 8: Block signatures
In the following chapter, unique FB/FC numbers are assigned for the blocks to be implemented. When
required, these can be adapted to address the requirements of the specific machine; this means that
the blocks can be freely renumbered and the blocks do not refer to one another.
3.1.5

Integration in cyclic interrupts - OBs

Safety notes and instructions
Blocks
F_SBR_MONITOR may only be integrated in an F-runtime group, which is called
from a cyclic interrupt OB 3
The cycle time of the cyclic interrupt OBs is parameterized in the HW Config
(CPU parameter "Cyclic interrupts, execution").
Safety notes and instructions
The cycle time of the safety program is configured to specifically address the
requirements derived from the risk assessment for the machine in which the
blocks are used. The user is responsible for correctly performing the risk as-
sessment and appropriately configuring the times.
Note
We recommend that the SCALE_DINT block is called in the same cyclic interrupt
OB as the safety program, e.g. immediately before the F_CALL block.
S7-Distributed Safety/SIMATIC Safety - fail-safe function blocks for storage and retrieval machines
SIMATIC S7 Distributed
Safety Programming
Block signa-
ture
980B
8DE4
610B
2644
2935
0797
5796
7CE3
FB9B
7AA8
FDD0
7459
6A25
None, as
standard
block
F_SAFE_POS, F_BRAKE_TEST,
x
. It is not permissible to integrate them in the OB 1.
SIMATIC STEP 7 Safety
Initial value Block signa-
signature ture
B06D 51BB
5896 E66B
64F3 610B
129F 2644
A68E 2935
8DF7 0797
222F 0884
222F 23F1
222F A489
222F 25BA
222F A2C2
222F 2B4B
None, as FC 6A25
None, as None, as
standard standard
block block
F_LOAD_MONITOR
Advanced
Initial value
signature
B06D
5896
64F3
129F
A68E
8DF7
222F
222F
222F
222F
222F
222F
None, as FC
None, as
standard
block
and
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