Communications
configuring
System- and communication configuring D7-SYS - SIMADYN D
3-281
Edition 12.2003
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For the same reason, this type of block communications can be
principally used for all types of serial and parallel data transfer routes,
where today "virtual communications" are used.
3.24.4.4 Associated function blocks
The blocks which can be used are arranged under the family names
"ZeigrKom" or "PointCom" in the CFC block Catalog.
In order to be able to simply identify and easily assign to this block group,
the blocks, whose function already corresponds to existing blocks, and
which now output a pointer for this application, have a "
_P
" (pointer) at
the end of the name.
Type name
Function
CPY_P
Copying buffer areas
CRV_P
Telegram block, receive (interface
processing)
CTV_P
Telegram block, send (interface
processing)
DB_P Data
block
DRD
Data Read REAL
DRD_D
Data Read DINT
DRD_I
Data Read INT
DRD_8
Data Read 8*REAL
DRD_8D
Data Read 8*DINT
DRD_8I
Data Read 8*DINT
DRD_BY
Data Read BYTE
DWR
Data Write REAL
DWR_D
Data Write DINT
DWR_I
Data Write INT
DWR_8
Data Write 8*REAL
DWR_8D
Data Write 8*DINT
DWR_8I
Data Write 8*INT
DWD_BY
Data Write BYTE
S7RD_P
Receive 128 bytes via a P bus (only
for FM 458-1 DP)
S7WR_P
Send 128 bytes via a P bus (only for
FM 458-1 DP)
BRCV
Block data receive via S7 connection
(only for FM 458-1 DP)
3.24.4.5 Pointer
interface
For pointer-based communications,
a pointer is transferred to the
telegram data buffer
between the blocks involved:
