Wavelength Electronics LFI-3751, User Manual

Page: 89 / 132

89
4
Chapter 4 - Remote Interface Reference
Starting RS-232 Communication with the LFI-3751
Starting RS-232 Communication with the LFI-3751
Once you have connected a computer and at least one LFI-3751, set the
unit’s RS-232 address from the front panel.
P ACT T
LIM I
AUX T
TE V
SET T
TE I
B
C
I
A
D
HOLD FOR LOCAL
RS-232 ERROR
STATUS
TEMP LIMIT
REMOTE
T LIMIT LIMIT I
SENSOR
decrease
increase
Hold in for
3 seconds
•
Press and hold the Shift Button . After three seconds, the RS-232
address will be displayed.
•
The REMOTE RS-232 LED will light solid to indicate the address is
displayed and can be adjusted.
•
Continue to hold the Shift Button and rotate the Digi-Pot Adjust Knob
to change the value from 1 to 99.
•
Release the Shift Button to save the displayed RS-232 address.
•
The RS-232 address can only be changed via the front panel.
Display RS-232 Address
Release the SHIFT Button to
save the displayed
RS-232 address.
Then, simply send a Command Packet to that instrument’s address.
•
The REMOTE RS-232 LED will fl ash to indicate communication is
occuring. The LED will light solid if the unit has not reverted to LOCAL
mode, and no communication with the host computer is ongoing.
The following sections detail how to operate the LFI-3751 via RS-232
communication.
1. Set RS-232 address
2. Send a Command Packet