This document introduces the communication parameters of DOP-A/AE/AS, DOP-B series HMIs with Siemens S7 300.
The manual describes the Siemens S7 300 programmable logic controller when used with a PC adapter. It covers RS‑232 pin assignments, data area structures (DBW, DBD, DBX), and communication parameters such as baud rate and supported speeds.
The document is revision V1.00 dated October 2009 and spans two pages, presenting tables of address ranges, timer and counter definitions, and notes on PC‑adapter wiring.
| Baud rate | 19200 |
|---|---|
| Data bits | 8 |
| Parity | Even |
| Stop bits | 1 |
| RS‑232 connector | 9‑pin D‑sub male and female |
| Supported communication speed | 19.2 kbps |
RXD is pin 2, TXD is pin 3, GND is pin 6, and RTS/CTS are pins 7 and 8 (cross‑linked).
The manual is revision V1.00 dated October 2009.