16.1.8 SFC 235 - SYNCHRON - Synchronization page frame
The SYNCHRON block initializes the synchronization between CPU and CP during the
boot process. For this it has to be called from the starting OBs. Simultaneously the transi-
tion area of the interface is deleted and predefined and the CP and the CPU agree about
the block size.
Parameters
Name Declaration Type Description
SSNR IN INT Interface number
BLGR IN INT Block size
PAFE OUT BYTE Parameterization error
To avoid long cycle run-times it is convenient to split large data amounts into smaller
blocks for transmitting them between CP and CPU. You declare the size of these blocks
by means of "block size". A large block size = high data throughput, but also longer run-
times and therefore a high cycle time strain. A small block size = smaller data throughput,
but also shorter run-times of the blocks. Following block sizes are available:
Value Block size Value Block size
0 Default (64byte) 4 128byte
1 16byte 5 256byte
2 32byte 6 512byte
3 64byte 255 512byte
Parameter type: Integer
Valid range: 0 ... 255
Description
Block size
VIPA SPEED7
System Blocks
Fetch/Write Communication > SFC 235 - SYNCHRON - Synchronization page frame
HB00 | OPL_SP7 | Operation list | en | 18-30 902
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