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Chapter 8 Using the Serial (RS-232) Interface
8.1 Serial (RS-232) Interface Functions and
Specifications
Receiving Function
Sending Function
RS-232 Interface Specifications
Switching between Remote and Local Modes
IM 755601-01E
LOCAL key
GP-IB connector
All of the parameters that you set with the panel keys can be set through the serial interface
except turning the power switch ON/OFF and setting the communication parameters.
Output requests for measured/statistical data, setup information, and error codes can be
also be received through the serial interface.
Measured/statistical data can be output.
Setup information and status byte can be output.
Error codes that have occurred can be output.
Electrical, mechanical characteristics: Conforms to the EIA-574 standard (for the 9-pin
Connection:
Communication:
Synchronization:
Baud rate:
Start bit:
Data length:
Parity:
Stop bit:
Connector:
Hardware handshaking:
Software handshaking:
When switching from local to remote mode
Receiving a "
:COMMunicate:REMote ON
the local mode causes the instrument to switch to the remote mode.
• The "REMOTE" indicator turns ON.
• All keys other than the LOCAL key are locked.
• The settings that existed in the local mode are maintained even when the instrument
switches to the remote mode.
When switching from remote to local mode
Pressing the LOCAL key when the instrument is in the remote mode causes the instrument
to switch to the local mode. However, this act produces no result if the "
" command has been received from the PC (local lockout condition).
LOCKout ON
When the "
:COMMunicate:REMote OFF
to the local mode regardless of the local lockout condition.
• "REMOTE" indicator turns OFF.
• Key operations are enabled.
• The settings that existed in the remote mode are maintained even when the
instrument switches to the local mode.
interface of the EIA-232 (RS-232) standard)
Point-to-point
Full-duplex
Start-stop synchronization
1200, 2400, 4800, 9600, 19200
1 bit (fixed)
7 or 8 bits
Even, odd, none
1 or 2 bits
For details contact your nearest YOKOGAWA dealer.
User can select whether to fix the CA and CB
signals to TRUE or use the signal for flow control.
User can select whether to use the X-ON and X-
OFF signals to control only the transmitted data
or both transmitted and received data.
X-ON (ASCII 11H)
X-OFF (ASCII 13H)
Received buffer size: 256 bytes
" command from a PC when the instrument is in
" is received from the PC, the instrument switches
8
:COMMunicate:
8-1
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