Receiving And Archiving The Data Records In S7-300, S7-400 And Winac - Siemens S7-200 Manual

Micro Automation Set 14
4.3 Receiving and archiving the data records in S7-300, S7-400 and
WinAC
Table 4-3
No.
1. The central processing units of S7-300,
S7-400 and WinAC station receive data
from S7-200 "Basis" in a receive buffer.
2. The archive data block has room for 90
data records consisting of 20 data fields.
One data field consists of 8 bytes user
data. Using self-defined data types
(UDTs), this structure is emulated for the
archive data block. The eight bytes user
data can be handled as a data type and
copied as often as desired.
Due to a relative addressing of the data
3.
records in the archive data block, a new
data record is added to the already
existing data records during each new
write procedure. If the archive data block
is full, the oldest archive data are
overwritten.
4. The job for archiving the 20 data fields at
the receive buffer in the archive data
block is issued if all 20 data fields have
been received and if consistency is
ensured.
V2.0
Entry ID 21062588
Function
05/18/05
Principle of Operation
Comment
Input buffer
DB1
55
55 78 98
78
98
Data field1 Archive
Hour;Byte Datafield1;UDT1
Minute;Byte Datafield2;UDT1
Second;Byte Datafield3;UDT1
Day;Byte Datafield4;UDT1
Month;Byte Datafield5;UDT1
Year;Byte
Value; Word
Variable name Data type
Data type
Variable name
Data available: OK
Create pointer
Consistency: OK
Copy data
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