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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
Interface
RS 422 signals
RS 485 signals
Max. distance
Max. baud rate
Technical Specifications of the 3964(R) Procedure
The following table contains the technical specifications of the 3964(R) procedure.
Table A-2
3964(R) procedure with default values
Max. message frame
length
Parameters
3964(R) procedure, can be assigned parameters
Max. message frame
length
Parameters
Point-to-point connection CP 440 Installation and Parameter Assignment
Manual, 09/2007, A5E00057742-03
www.gkbpx.com
Technical Specifications of the X27 (RS 422/485) Interface
RS 422 or RS 485, 15-pin sub D female
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
1200 m
115200 baud
Technical Specifications of the 3964(R) Procedure
400 bytes (Page 86)
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
•
400 bytes (Page 86)
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
•
Technical Specifications
A.1 Technical Specifications of the CP 440
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