Siemens SIMATIC S7 Configuration And Programming Manual page 69

Block size of all automatically generated F blocks
To make sure that the automatically compiled F-blocks do not exceed the
maximum possible size in the particular F-CPU, remember the following:
•
The maximum size of an F-FB/F-FC/F-PB should be a quarter of the max. size
of the FBs or FCs (see Technical Specifications in the manual of the F-CPU
you are using).
•
For F-FBs (including the F-PB), the following must apply:
2 x number of all parameters or static data of the data type BOOL
+ 4 x number of all parameters or static data of the data type INT
+ 6 x number of all parameters or static data of the data type TIME
< maximum size of the data blocks in bytes
(see Technical Specifications in the manual of the F-CPU you are using)
•
The following must apply to F-DBs:
2 x number of all tags of the F-DB of the data type BOOL
+ 4 x number of all tags of the F-DB of the data type INT
+ 6 x number of all tags of the F-DB of the data type TIME
< maximum size of the data blocks in bytes
(see Technical Specifications in the manual of the F-CPU you are using)
If you receive the message "The block x could not be copied" when you download
your safety program to the F-CPU, check whether these conditions are met and
reduce:
•
the size of the F-FB/F-FC/F-PB or
•
the number of parameters and static data of the F-FBs/F-PBs or
•
the number of tags of the F-DBs.
Section 5.6.3, "Inserting Application Templates"
Prior to inserting the application template F_ESTOP (FBD) or F_ESTOP (LAD),
you must copy the F-application block F_TOF from the block container
F-Application Blocks\Blocks of Distributed Safety F-Library (V1) to the block
container of your S7 program, if it is not already present.
Section 5.7.3, F Application Blocks
Safety Note
!
You must use a separate instance DB for each call of one of the following
F application blocks:
F_TP, F_TON, F_TOF, F_ACK_OP, F_2HAND, F_MUTING or F_1oo2DI
Each call for the F application blocks listed must only be processed once in a cycle
of the F run-time group.
Product Information for the S7 Distributed Safety, Configuring and Programming Manual
A5E00169432-02
69