Siemens SIMATIC S7-400 CP 440 - Technical Specifications of the X27 (RS 422;485) Interface; Technical Specifications of the 3964(R) Procedure

Technical Specifications
A.1 Technical Specifications of the CP 440
Point-to-point connection CP 440 Installation and Parameter Assignment
Manual, 09/2007, A5E00057742-03
139
Technical Specifications of the X27 (RS 422/485) Interface
The following table contains the technical specifications of the X27 (RS 422/ 485) interface of
the CP 440-RS 422/485.
Table A-1 Technical Specifications of the X27 (RS 422/485) Interface
Technical Specifications
Interface RS 422 or RS 485, 15-pin sub D female
RS 422 signals
RS 485 signals
TXD (A), RXD (A), TXD (B), RXD (B), GND
R/T (A), R/T (B), GND
all isolated against the S7-internal power supply (backplane bus) and the
external 24 V DC supply
Max. distance 1200 m
Max. baud rate 115200 baud
Technical Specifications of the 3964(R) Procedure
The following table contains the technical specifications of the 3964(R) procedure.
Table A-2 Technical Specifications of the 3964(R) Procedure
3964(R) procedure with default values
Max. message frame
length
400 bytes (Page 86)
Parameters can be assigned parameters:
• With/without block check character
• Priority: low/high
• Transmission speed: 300, 600, 1200, 2400, 4800, 9600, 19200,
38400, 57600, 76800, 115200 bps
• Character frame: 9, 10, 11 or 12 bits
• Initial state of receive line: none, R(A)5V/R(B)0V, R(A)0V/R(B)5V
• Number of buffered message frames: 1 to 10, use entire buffer
3964(R) procedure, can be assigned parameters
Max. message frame
length
400 bytes (Page 86)
Parameters can be assigned parameters:
• With/without block check character
• Priority: low/high
• Transmission speed: 300, 600, 1200, 2400, 4800, 9600, 19200,
38400, 57600, 76800, 115200 bps
• Character frame: 9, 10, 11 or 12 bits
• Character delay time: 20 ms to 65535 ms in 10 ms increments
• Acknowledgment delay time: 20 ms to 65535 ms in 10 ms increments
• Number of setup attempts: 1 to 255
• Number of transmission attempts: 1 to 255
• Initial state of receive line: none, R(A)5V/R(B)0V, R(A)0V/R(B)5V
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
长沙工控帮教育科技有限公司
www.gkbpx.com