Chapter 3 Operating In Remote Control; Introduction; Introduction; Reading The Gpib Address - ILX Lightwave LDX-3200 Series User Manual

CHAPTER 3
OPERATING IN REMOTE CONTROL

INTRODUCTION

Everything you learned to do from the front panel can also be done remotely and in some cases with more flexibility.
For instance, in remote mode, you have access to commands for functions not found on the front panel, such as
commands that will increment (INC) and decrement (DEC) the current set point by a pre-defined step value. The
following sections show you the fundamentals of operating your LDX-3200 Series Precision Current Source remotely
through the GPIB interface.

Reading the GPIB Address

Before you can operate the LDX-3200 instrument from a remote location, you need to know its GPIB address. Simply
press the LOCAL switch in the section labeled GPIB on the front panel. The instrument will display the address. The
default address from the factory is address "Adr 01".

Changing the GPIB Address

Every device on the GPIB bus must have a unique address. If it is necessary to change the
address, press and hold in the (PARAMETER) SET switch while displaying the GPIB address.
Turn the ADJUST knob until the desired address value is displayed, then release the SET
switch. The new GPIB address will then be stored in non-volatile memory. The allowable
address range is 0 - 30 for primary GPIB addressing. Extended GPIB addressing is not
implemented on the LDX-3200 Series Precision Current Source at this time.

Changing Operation from Local to Remote

Sending a command over the GPIB will automatically put the instrument in REMOTE mode. The REMOTE indicator
will identify when the Current Source is in remote operation mode. When the instrument is in REMOTE mode,
pressing the LOCAL switch returns the instrument to LOCAL control mode unless the Local Lockout state has been
activated by the host computer. Local Lockout disables all LDX-3200 Series Precision Current Source front panel
switches until this condition is changed by the host computer. When the instrument is put in Local Lockout Mode
by the host computer, the REMOTE indicator will flash at a 1 Hz rate to indicate that the front panel is completely
disabled by Local Lockout.
The TALK/LISTEN indicator is illuminated when the instrument is communicating over the GPIB bus.
OPERATING IN REMOTE CONTROL
CHPT 3
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