Target Controls - Advanced Energy MDX II User Manual

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Advanced Energy
The output control signal (Slave pins 15 and 34) from the master unit determines the output for
the system. Each slave is told what percentage of its maximum output to produce. For
example, a 15 kW slave unit produces 7.5kW when commanded to produce 50%; a 30 kW
slave produces 15 kW. The master unit calculates and controls the total output by monitoring
the slaves' feedback on the amount of current each one is actually producing.
Once the system is properly connected, it appears to function like a single MDXII unit. This
transparency of operation is ensured by the level of information that is provided to the units in
the system.
The master communicates the following information through the Slave port:
• Tap setting for the system.
• Enable/disable contactor hold.
• Setpoint for the system.
• Specific slave unit on/off.
• System on/off.
The slaves provide the following feedback to the master unit:
• An arc has been detected by a slave unit.
• A fault has occurred in a slave unit.
• Current at output of slave unit.
• Identification of slave unit (slave1, slave2, or slave 3).
• Contactor is closed and slave is ready to deliver power.

Target Controls

Target control functions allow you to choose an operating target, set the length of life for the
target, and monitor target life left while the process is running. The target life value is entered
(and displayed) in kilowatt-hours. The maximum target life setting is 15,000 kWh for an
MDXII 15 kW and 30,000 kWh for an MDXII 30 kW and 45,000 kWh for a MDXII 45kW,
etc. If the end of the target life is reached, the message "EOTL" (end of target life) is displayed
on the control panel, but output is not turned off. The only way to clear this message is to press
the STANDBY switch, which also turns off the output.
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