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3.4
Local/Remote Control
Local (front panel) control is in effect immediately after the power is applied. The front
panel keypad and display allow manual control of individual module when Load is used in
bench test applications. Remote control goes into effect as soon as the Mainframe receives a
command via GPIB or RS-232C. When the remote control is in effect, only the computer
can control the Load. The front panel keypad has no effect except the
return to local control by pressing
remote state.
Most of the functions that perform remotely can be done locally too at the Mainframe front
panel. The keypads on the module can perform simple functions like short, load on/off,
static/dynamic, and load A/B or display selection R/L.
Details of local operation are given in Chapter 4 Local Operation. Fundamentals of remote
programming are described in the High Speed DC Electronic Load 6330 Series Programming
Manual.
3.5
Modes of Operation
There are three modes of operation: Constant Current (CC), Constant Resistance (CR), and
Constant Voltage (CV).
When you press
ENTER
change of modes the module's input is momentarily disabled before a new mode is enabled.
This ensures the minimum overshoots during mode change. The parameters in current,
resistance or voltage mode can be programmed easily when the mode is selected.
All data set in CC/CR/CV mode will be rescaled to fit the resolution of current/voltage levels
or slew rate. In local mode any value can be set from the keypad. There is no upper and
lower limit that would cause an error. Mainframe automatically selects data, which is
rescaled from the programmed value, truncates and checks high, low boundary before fitting
it into the memory. When the programmed data is over the boundary, Mainframe will set
the maximum or minimum level for Load module. In remote mode the programmed value
cannot be over boundary. An error will occur when the data is over the maximum or
minimum value.
key. The
LCL
key to program a mode, the module will change to a new mode. In
key acts as
SHIFT
LCL
Operation Overview
key. You can
LCL
when Load is in
3-3
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