Unit Control Hierarchy - Advanced Energy MDX II User Manual

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Advanced Energy

Unit Control Hierarchy

The MDXII unit gives default operation control to one of the above three interfaces based on
the following hierarchy:
1. Control panel (if your MDXII unit has an active front panel or an active remote panel)
2. User port (if your MDXII unit has a passive panel)
If your MDXII unit has an active front panel or an active remote panel, this panel is given
default control. You can give control to a different interface as follows:
1. First turn off the output power.
Note: You cannot change the control mode if the MDXII unit is producing power. Any
attempt to change mode is ignored; however, you may turn off output power at any
time from any interface regardless of the selected control mode. If the User port
has control, and you turn off the output from the control panel or serial interface,
you must toggle User pin 14 (RMT OFF.D) before you can turn the output back on
from the User port.
2. Then press either the LOCAL, HOST, or ANALOG switch located on the control panel.
• LOCAL gives control to the control panel.
• ANALOG gives control to an analog controller connected through the User port.
• HOST gives control to a host computer connected through the serial port.
Note: Also, you can give the serial interface control by issuing Command 14 (see page
7-1).
When you press one of the above switches, control is transferred to the mode you selected.
The most recently selected control mode is stored in nonvolatile memory. This means that if
input power is interrupted, the same control mode is active when power is restored. The
amount of control each interface has is determined by the program source feature (see page
5-16).
2-4 Product Overview 5700262-R