Siemens CP 243-1 - Page 98

Programming
4.3 ETHx_XFR
CP 243-1
98 Operating Instructions, 03/2012, C79000-G8976-C244-02
Call
ETHx_XFR
START
EN
DONE
Done
Chan_ID
CHANNEL
ERR
Error
Data
DATA
Abort
ABORT
Always_On
START_BIT
Figure 4-3 Calling the ETHx_XFR subroutine
Input parameters
Name Type Meaning
START BOOL Input condition for triggering a
read/write request
0: Do not trigger read/write request
1: Trigger read/write request
Chan_ID BYTE Number of the channel via which the
data will be be accessed. This channel
must be configured as client.
Value range: 0 .. 7
Data BYTE Number of the channel-specific data
block from the configuration that
describes the read/write request to be
executed.
Value range: 0 .. 31
Abort BOOL Input condition for aborting a data
access
0: Do not abort data access
1: Abort data access
Input parameters (ETHx_XFR)