Remote Operation
5-3
5.3 GPIB Capability of the Electronic Load
GPIB
Capability
Response
Interface
Functions
Talker/
Listener
All electronic load functions except for setting the GPIB
address are programmable over the GPIB. The elec-
tronic load can send and receive messages over the
GPIB. Status information is sent using a serial poll.
AH1, SH1,
T6, L4
Service
Request
The electronic load will set the SRQ line true if there is
an enabled service request condition.
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 there until it receives a command over the
GPIB. Once the electronic load is in remote mode,
REMOTE
appears on the front panel LCD, all front
panel keys except LCL are disabled, and the load
module display is in normal metering mode. Pressing
the LCL key on the front panel returns the electronic
load to local mode. Local can be disabled using local
lockout, so only the controller or the power switch can
return the electronic load to local mode.
RL1
Device
Clear
The electronic load responds to the Device Clear (DCL)
and Selected Device Clear (SDC) interface commands.
These cause the electronic load to clear any activity
that may prevent it from receiving and executing a
new command. DCL and SDC do not change any
programmed settings.
DCL, SDC
5.4 RS232C in Remote Control
To enable remote control operation, send the command CONFigure: REMote ON. To
return to local operation, send the command CONFigure: REMote OFF.
Terminate the RS232C command string with <nl>. Its ASCII code is hexadecimal 0A
(or decimal 10). The control commands for RS232C are the same as those for GPIB.
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