Interface Setup > RS232C Interface

GPIB Interface
USB Interface

RS232C Interface

RS232C connection

Turn off the POWER switch on the KFM2005/KFM2030 and the computer.

Use a D-sub 9-pin female-to-female AT type cross cable for the RS232C cable. Figure shows the connector pin assignments.

The KFM2005/KFM2030 does not use hardware handshaking (Cross cable example2).

 

9-pin AT type connector

RS232C configuration

1.   Check that the LOAD ON LED is turned off.

If it is on, press the OFF key to turn it off.

2.   Press the SYSTEM key.

The LCD switches to the Interface setup screen.

3.   Press the F1 key repeatedly until Interface is set to RS232C.

4.   Turn the rotary knob to set the bit rate.

5.   Press the rotary knob.

6.   Turn the rotary knob to set the data length.

7.   Press the rotary knob.

8.   Turn the rotary knob to select the acknowledge.

9.   Turn the power off and on again.

The setting changes will take effect.

Protocol

Table shows the RS232C protocol.

Underline indicates factory default condition.

 

Table 1    RS232C protocolI

Item Setting
Connector 9-pin D-sub terminal on the rear panel
Bit rate 2 400 bps/ 4 800 bps/ 9 600 bps/ 19 200 bps
Data length 7 bits or 8 bits
Stop bit Fixed to 2 bit
Parity Fixed to none
Acknowledge ON/ OFF

Transmission / Reception via the RS232C

Control the transmission / reception via the RS-232C using X-flow control or acknowledge function.

Transmission / reception may not work correctly through unilateral transmission.

Acknowledge

When set to acknowwledge ON, the string OK or ERROR is sent to the host for set commands. For query commands, the response data is sent to the host as usual.

X-Flow control

If acknowledge is OFF, X-Flow control is always used.

Break signal

The break signal functions as a substitute for the IEEE488.1 dcl / sdc (Device Clear, Selected Device Clear) message.