KL6031 – Basic function principles

The KL6031 serial interface terminal enables the connection of devices with an RS232 interface (e.g. bar code scanners). Data can be exchanged with the controller in full duplex mode, independent of the higher-level bus system. The receive buffer has 1024 bytes, the transmit buffer 16 bytes. The data transfer between terminal and controller is handled via a handshake in the status and control byte. The factory setting of the terminal is 9600 bit, 8 data bits, 1 stop bit, no parity, RTS/CTS control active.

LED display

The Run LED indicates the operating state of the terminal.

On – normal operation
Off – Watchdog timer overflow has occurred. If no process data is transmitted from the Bus Coupler for 100 ms, the green LED goes out.

The TxD and RxD LEDs indicate the states of the signal lines.

Process data - alternative output format

In the alternative output format, 4 or 5 bytes (3 bytes for data and 1 or 2 control/status byte(s)) are mapped in the Bus Coupler. The KL6031 is delivered in the alternative format. The mapping of the terminal in the alternative format is described in more detail in the chapter "Terminal configuration".

Process data - standard output format

In the standard output format, 4 bytes of user data (3 bytes of user data and 1 Control/Status byte) are mapped by default in the Bus Coupler. By changing the parameters of the KL6031, up to 5 bytes of user data can be transferred.

Reference

The chapter "Access from the user program" provides an overview of the possible mapping configurations depending on the adjustable parameters.