20 | ESP302-GPIB-ADPT
A1387A0-EDH0429En1010 11/21
USER's MANUAL
3.5.2
Starting communication
•
Launch your usual interactive program and verify it found your GPIB Controller.
•
Apply power to the ESP302-GPIB-ADPT module while watching the LEDs. After internal
self-test (during which each LED sequentially turns on and off), it then shows its current
GPIB device address by blinking the appropriate front panel LEDs for about 2 seconds.
The LED bit weights are:
RDY
TALK
LSTN
SRQ
ERR
16
8
4
2
1
The LSTN LED should blink for new units which are factory set to GPIB address 4.
Then PWR and RDY LEDs should be on.
Figure 8: LEDs
•
Set the ESP302-GPIB-ADPT’s GPIB address in your interactive program.
•
Send the 488.1 "GET" Trigger command to the ESP302-GPIB-ADPT module to switch to
Command mode (Advanced menu / Triggers tab / Assert Trigger button in VISA Test
Panel).
•
Provide a short 30 millisecond pause after the Device Trigger before sending the unit a
command or query.
•
Send the 488.2 *IDN? query and read the IDN message to be sure you are talking to the
ESP302-GPIB-ADPT:
Write:
*IDN?
Read:
NEWPORT
, ESP302-GPIB-ADPT, S/N 501001, rev x1
(example)
•
If you do not get a response, power the ESP302-GPIB-ADPT off and repeat this sequence
until you can read the IDN message.
•
If the ESP302-GPIB-ADPT’s red ERR LED comes on, send an *ESR? query to clear the
error. The ESR query returns an error code that you can look up in Table 4 to see what
was wrong with the command. Correct the command and resend it until you can do it
without generating an error (commands should terminate by LF (10) and/or EOI asserted
with last character).
