Power Supply Enhancements; Lock; Program Source - Advanced Energy MDX II User Manual

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Advanced Energy

POWER SUPPLY ENHANCEMENTS

Several configuration choices help increase the flexibility of the MDXII power supply.

Lock

The lock function provides security for your system. When the control panel is locked, only
people who know the unlock code can get access to the menu and make changes. When
locked, you cannot turn on the MDXII unit from the control panel, and all the settings are
protected from unauthorized changes.
The MDXII unit is shipped without an unlock code, so you must enter one before you can lock
the control panel and be able to unlock it later. If you try to use the lock function before you
enter a code, the message "Enter code first" displays and you are returned to the output display
screen.
You can set the code and lock the panel only through the control panel. See "Locking the
Control Panel" on page 6-12 for step-by-step instructions. You can request the lock code
through the serial port. You cannot use the lock function through the User port.

Program Source

The program source function specifies whether the source of the parameters that the MDXII
unit uses is internal or external.
If you set program source to internal, the MDXII unit uses the setpoint and regulation
information for output regulation mode, setpoints, and ramp/run times that you entered either
from the control panel or through the serial port and which are stored internally in nonvolatile
memory. Also, the MDXII unit uses either 1) a ramp/run recipe (if one has been programmed,
see page 5-4) or 2) a manually set value (if the number of recipe steps is set to zero). If the
source is internal and no recipe is active, the "Setpoint = nn.nn" line on the output display
screen is preceded by "Int" ("Int Setpoint = nn.nn").
If you set the program source to external, the MDXII unit uses the setpoint, regulation, and
ramp time that you specify externally through pins 27, 5 or 6, and 26 (respectively) on the
User port.
Note: If the source is external, you will not be able to set a run time, because that feature is
not available on the User port connector; therefore the unit will run until you turn it off.
If the source is external (and no recipe is active), the "Setpoint = nn.nn" line on the output
display screen will be preceded by "Ext" ("Ext Setpoint = nn.nn"). If a recipe is active, the
message "Timers Active' will be displayed instead, indicating that you cannot change the
setpoint.
When the MDXII unit is set to operate in local or host mode, the default program source for its
parameters, setpoints, and ramp/run sequences is internal.
When the MDXII unit is set to operate in analog mode, the default program source for its
setpoints and ramp times is external.
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