Hardware manual

5 SIEMENS
2-159
Chap.2
5.4.2 S7-300/S7-400
The communication port settings for S7-300 and MICRO/I host port are as follows.
Items Details
Serial Interface RS-232C
Baud Rate (bps)
1200/2400/4800/9600/19200/38400
Data Bits (bit) 8 (Fixed)
Parity Even/Odd/None
Stop Bits (bit)
Use the same
settings as for the
MICRO/I.
1/2
BCC Enable/Disable
Priority Low
MICRO/I type performs communication based on 3964 (R) and RK512 protocol.
CP340 is supporting only the 3964 and 3964R protocol. Therefore when using CP340, it is
necessary to construct the program to realize RK512 protocol in PLC. This is programmed
using the function blocks FB2 and FB3, in SIEMENS PLC.
CP341 is supporting 3964 (R) and RK512 protocol, please choose RK512 by setup PLC.
The program of CP340 refer to a sample program.
The sample program is recorded on CD-ROM after Wind O/I NV2 Ver2.50.
Please refer to the following folder.
(Wind O/I NV2 CD-ROM) /Sample/Host_if/SIEMENS/
Downloading from our Website is possible.