Operating instructions

Introduction
9
Table 1-1. GPIB Capabilities of Electronic Loads
GPIB Capabilities Response Interface
Function
Talker/Listener All electronic load functions except for setting the GPIB address are
programmable over the GPIB. The electronic load can send and receive
messages over the GPIB. Status information is sent using a serial poll. Front
panel annunciators indicate the present GPIB state of the electronic load.
AH1, SH1, T6. L4
Service Request The electronic load sets the SRQ line true if there is an enabled service
request condition. Refer to Chapter 5 - Status Reporting for more
information.
SR1
Remote/Local In local mode, the electronic load is controlled from the front panel but will
also execute commands sent over the GPIB. The electronic load powers up
in local mode and remains in local mode until it receives a command over
the GPIB. Once the electronic load is in remote mode the front panel RMT
annunciator is on, all front panel keys (except
) are disabled, and the
display is in normal metering mode. Pressing
on the front panel
returns the electronic load to local mode.
can be disabled using
local lockout so that only the controller or the power switch can return the
electronic load to local mode.
RL1
Device Trigger The electronic load will respond to device trigger function. DT1
Device Clear
The electronic load responds to the Device Clear (DCL) and Selected
Device Clear (SDC) interface commands. They cause the electronic load to
clear any activity that would prevent it from receiving and executing a new
command (including *WAI and *OPC?). DCL and SDC do not change
any programmed settings.
DCL, SDC