M_Field_Read - Siemens SIMATIC S7 Operating Instructions Manual

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m_field_read

The function m_field_read reads "amount" of flag bytes from the PLC starting
from flag 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 a_field_read, e_field_read
C-Adapter
int m_field_read (int no,int amount,void * buffer);
m_field_write
The function m_field_write writes "amount" of bytes from the specified storage
area to the PLC starting from flag 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 a_field_write
C-Adapter
int m_field_write (int no,int amount,void* buffer);
Toolbox for Data Link PGs/PCs to SIMATIC S7
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PRODAVE S7