Interface Setup > RS232C Interface

GPIB Interface (Option)
USB Interface (Option)

RS232C Interface (Standard Equipped)

RS232C connection

Turn off the POWER switch on the PCR-M and the computer.

Use a D-sub 9-pin female-to-female AT type cross cable for the RS232C cable. Fig. 1 shows the connector pin assignments.

The PCR-M does not use hardware handshaking (Cross cable example2).

 

Fig.1    9-pin AT type connector

RS232C configuration

1.      Press the CONFIG switch several times to select IntF (interface).

2.      Turn the rotary knob to select 232 (RS232C).

3.      Press the CONFIG switch to select bAUd (baud rate).

4.      Turn the rotary knob to select the baud rate.
The selectable baud rates are 1.2, 2.4, 4.8, 9.6, or 19.2 (in unit of kBPS).

5.      Press the CONFIG switch to select F.CTL (Xon/Xoff flow control).

6.      Turn the rotary knob to select ON or OFF.

7.      Wait at least five seconds after CONFIG operation, then turn the power off and on again.
The setting changes will take effect.

Protocol

Table 1 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
Baudrate 1 200 bps/ 2 400 bps/ 4 800 bps/ 9 600 bps/ 19 200 bps
Data length Fixed to 8 bits
Stop bit Fixed to 1 bit
Parity Fixed to none
XON/XOFF control XFLOW/NONE

Break signal

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

RS232C communication

Use XON/XOFF flow control for RS232C communication. DC (device control) codes are used as control codes.

Transmission/reception may not work correctly through unilateral transmission.

 

Table 2    DC codes

Code Function ASCII Code
DC1 Transmission request 11H
DC3 Transmission stop request 13H

 

Fig.2    RS232C terminal and transmission control of the PCR-M