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3.9
SERIAL INTERFACE OPERATION DIFFERENCES
The 2307/2367's serial interface is factory set to operate at 9600 baud, with
8 data bits, 1 stop bit and no parity. For user convenience, serial commands
that change the UART or Network settings do not take affect until the next
power turn-on or until a *RST, *RCL 0, or SYST:COMM:SER:UPdate
command is received. To change the serial settings, send the 2307/2367 the
new serial parameters, verify them by querying the unit and then save the
configuration with the *SAV 0 command. Turn power off and back on or
use the *RCL 0 or SYST:COMM:SER:UPdate command to update the
UART.
NOTE: You must change the controller's serial settings
before sending the 2307/2367 the next command.
3.9.1
Echo and Prompts
The 2307/2367 provides echos and prompts on its RS-232 interface. The
2307/2367 defaults to echo on at power turn-on for keyboard operation.
The echo function can be disabled for computer operation by sending the
unit a CNTL-F. A CNTL-E turns the echo function on.
For terminal operation, use CNTL-E to turn echo on. If echo is on, the unit
will echo back the command or query, output a response if one is required
and a prompt.
For program operation, use CNTL-F as the first command to turn echo off.
The unit will respond to a command by returning a response if one is called
for and a prompt when ready for the next command. The user's program
should check and wait for the expected response and then the prompt before
sending the unit another command. The following examples show the unit's
response to user commands in bold type. The prompt formats are:
Echo
RS-232
RS-485 Message
Prompt
back
Prompt
Prompt Terminator Sent
On
CR LF > sp
n/a
CR LF
Yes
Off
> LF
>LF
LF
Yes
