CPU ADAM 821x
Chapter 7 Integrated OBs, SFBs and SFCs
ADAM 8000 Manual CPU 821x – Rev 1.1
7-41
SFC 235 - SYNCHRON
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 transition area of the interface is deleted and
predefined and the CP and the CPU 821x agree about the block size.
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 this 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
Parameter
Block size
11
x
21
x
51
x