Siemens SIMATIC S7 - Functions for Data Transfer to S7 200; Functions for Data Handling in PG;PC

SIEMENS AG PRODAVE S7
Toolbox for Data Link PGs/PCs to SIMATIC S7
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1.1.2 Functions for Data Transfer to S7 200
- read output bytes from PLC (as200_a_field_read).
- write output bytes (as200_a_field_write).
- read input bytes from PLC (as200_e_field_read).
- read data bytes from variable memory (as200_vs_field_read).
- write data bytes to variable memory (as200_vs_field_write).
- read flag bytes from PLC (as200_m_field_read).
- write to flag bytes in PLC (as200_m_field_write).
- read special flag bytes from PLC (as200_sm_field_read).
- write to special flag bytes in PLC (as200_sm_field_write).
- status test of a flag (as200_mb_bittest).
- set and reset flag (as200_mb_setbit, as200_mb_resetbit).
- read timer words from PLC (as200_t_field_read).
- read counter words from PLC (as200_z_field_read).
- overwrite counter words in PLC (as200_z_field_write).
- read mixed data (as200_mix_read).
- write mixed data (as200_mix_write).
1.2 Functions for Data Handling in PG/PC
- error text output relating to error number (error_message).
- format conversion of S7 data (gp_to_float, float_to_gp).
- format conversion of S5 data (kg_to_float, float_to_kg).
- byte conversion of a byte to eight logical values and vice versa (boolean_byte,
byte_boolean).