GW Instek GPI-700A Series Programming Manual - Manual (Page 3)

GPI/GPT SERIES PROGRAMMABLE EST
PROGRAMMER MANUAL
⎯ 3 ⎯
DT0 (Device Trigger) : The EST has no Device Trigger interface
function.
C0 (Controller) : The EST can not control other devices.
Notes for GPIB installation
When the programmable EST is set up with a GPIB system, please check
the following things:
z Only a maximum of 15 devices can be connected to a single GPIB
bus.
z Do not use more than 20m of cable to connect devices to a bus.
z Connect one device for every 2m of cable used.
z Each device on the bus needs a unique device address. No two
devices can share the same device address.
z Turn on at least two-thirds of the devices on the GPIB system while
using the system.
z Do not use loop or parallel structure for the topology of GPIB
system.
Computer’s Connection
A personal computer with a GPIB card is the essential facilities in order
to operate the programmable EST via GPIB interface.
The connections between power supply and computer are following:
I. Connect one end of a GPIB cable to the computer.
II. Connect the other end of the GPIB cable to the GPIB port on
the programmable EST.
III. Turn on the programmable EST.
IV. Turn on the computer.
GPI/GPT SERIES PROGRAMMABLE EST
PROGRAMMER MANUAL
⎯ 4 ⎯
The GPIB connection testing
If you want to test whether the GPIB connection is working or not, you
can send a GPIB command from computer. For instance, the query
command
*idn?
should return the Manufacturer, model number, serial number and
firmware version in the following format:
GW.Inc,GPI-745,0,FW1.00
If you do not receive a proper response from the EST, please check if the
power is on, the GPIB address is correct, and all cable connections are
active.
3. CONNECTING THE PROGRAMMABLE EST VIA
RS232 INTERFACE
The RS232 interface capabilities:
The RS232 interface provides a point-to-point connection between two
items of equipment such as a computer and the EST. There are some
parameters you need to set on the both sides. Once you have set these
parameters, you can control the power supply through the RS232
interface.
z Baud rate: You can set rates of 1200, 2400, 4800 or 9600 baud.
z Parity bit: none.
z Data bit: 8 bits.
z Stop bit: 1 stop bit.
z Data flow control: none.