Chapter 13 RS-232C function of K200S MASTER-K
13-1
13 RS-232C function of K200S
13.1 Introduction
The K200S A and C type (K3P-07AS and K3P-07CS) have built-in RS-232C communication
function and those CPU modules can perform RS-232C communication without external Cnet
I/F module. Although the all functions of external Cnet I/F module are not supported, it is very
useful function for users who want to construct simple and low-cost RS-232C network. The
K200S A and C type CPU provide following RS-232C communication functions;
- Individual reading
- Continuous reading
- Individual writing
- Continuous writing
- CPU operation status monitoring
- Register monitoring number
- Monitoring execution
Because the built-in RS-
232C communication functions only support a part of all functions of
external Cnet module, there are some limitations as followings;
1. Only RS-232C protocol is supported. ( K200S B type CPU, K3P-07BS, supports RS-
422/485 protocol )
2. Only 1:1 communication is available.
3. The K200S CPU module has only one RS-232C connector, loader (KGL-
loader) communication and the built-in RS-232C communication shares the RS-
connector. Please refer chapter 13.3 for detail pin-out of RS-232C connector.
4. Some error codes of external Cnet module and built-in RS-
different each other. Therefore, please be sure to refer an error code list of the user’
manual of corresponding unit.
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