This section contains information on the following topics:
- P_SEND: Sending Data (S7-300, S7-400)
- P_RCV: receiving data (S7-300, S7-400)
- P_PRINT: Print message text with up to 4 variables (S7-300, S7-400)
- P_RESET: Delete receive buffer (S7-300, S7-400)
- V24_STAT_340 / V24_STAT: Reading accompanying signals from the RS232C interface (S7-300, S7-400)
- V24_SET_340 / V24_SET: Writing accompanying signals to the RS232C interface (S7-300, S7-400)
- STATUS parameter (S7-300, S7-400)