Siemens SIMATIC S7 - D_Field_Read

SIEMENS AG PRODAVE S7
Toolbox for Data Link PGs/PCs to SIMATIC S7
30
d_field_read
The function d_field_read reads “ amount“ of data bytes from the PLC starting
from data byte "no" and stores the read values in a variable field of the PG/PC.
If there were no errors, the function supplies 0 as the return value otherwise an
error message which can be evaluated in accordance with the error table (see
error_message).
☞
☞☞
☞
See also d_field_write
C-Adapter (mini)
int d_field_read
(int bstno, int no,int amount,void * buffer);
d_field_write
The function d_field_write writes "amount“ of bytes from the specified storage
area to the PLC, starting from data byte "no".
If there were no errors, the function supplies 0 as the return value otherwise an
error message which can be evaluated in accordance with the error table (see
error_message).
☞
☞☞
☞
See also d_field_read
C-Adapter (mini)
int d_field_write
(int bstno, int no,int amount,void* buffer);