15-8
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2600AS-901-01 Rev. B / September 2008
Section 15: Communications Interfaces
Series 2600A System SourceMeter® Instruments Reference Manual
LOCAL key
The
LOCAL
(
EXIT
) key cancels the remote state and restores local operation of the instrument.
Pressing the
LOCAL
key also turns off the REM indicator and returns the display to normal if a
user-defined message was displayed.
If the LLO (Local Lockout) command is in effect, the
LOCAL
key is also inoperative. For safety
reasons, the
OUTPUT OFF
key can be used to turn the output off while in LLO. Note that pressing
LOCAL
or
OUTPUT OFF
will also abort any commands or scripts that are being processed.
RS-232 interface operation
Setting RS-232 interface parameters
Front panel RS-232 parameters
To set interface parameters:
1.
Press
MENU
>
RS232
and then press
ENTER
the
navigation wheel
.
2.
Select and enter the following interface parameters:
•
Baud rate
•
Number of bits
•
Parity
•
Flow control
(See the following section for details)
3.
Press
EXIT
as needed to back out of the menu structure.
Remote RS-232 parameters
Commands to set RS-232 parameters are listed in
for more
information.
Note that changing the serial port settings take effect when the command is processed. Any
response messages generated after processing these commands will be sent with the new
settings. If command messages are being queued (sent before these commands have executed),
the new settings may take effect in the middle of a subsequent command message, so care should
be exercised when setting these attributes from the RS-232 interface.
Table 15-2
RS-232 interface commands
Command
Description
serial.baud = baud
serial.databits = bits
serial.flowcontrol = flow
serial.parity = parity
Set baud rate (300, 600, 1200, 2400, 4800, 9600,
19200, 38400, 57600, or 115200)
Set number of bits (7 or 8)
Set flow control:
serial.FLOW_NONE(no flow control)
serial.FLOW_HARDWARE (hardware flow control)
Set parity:
serial.PARITY_NONE (no parity)
serial.PARITY_EVEN (even parity)
serial.PARITY_ODD (odd parity)