Halo - Advanced Energy MDX II User Manual

ASCII:
Request from the host:
30h 38h 43h
'0' '8' 'C'
Header Command
Acknowledge and data from the MDXII:
06h 30h 42h
AC '0' 'B'
Ack Header
Acknowledge from the host:
06h
Ack

HALO

The HALO (high accuracy at low output levels) feature reduces the full-scale output by one-
tenth so that you can achieve greater accuracy at the lower output levels. When you need a
low-power or low-current output of 0 to 1.5 kW (or 0 to 4.8 A) or 0 to 3 kW (or 9.6 A), HALO
allows you to specify a setpoint within those ranges by providing tighter output regulation.
You can use HALO only when in current or power regulation mode. Voltage remains
unchanged.
Note: If you specify a setpoint from the control panel that is greater than the maximum
HALO range (1.5 kW or 4.8 A for an MDXII 15k unit; 3 kW or 9.6 A from an MDXII
30k unit) and then select HALO from the menu, the setpoint lowers automatically to the
maximum power (or current) level available when HALO is active (1.5 kW or 4.8 A; 3
kW or 9.6 A).
You can use HALO only in current and power regulation modes. Voltage remains
unchanged. You can enable the HALO feature from a control panel and through the serial port
or User port interfaces.
Note: A HALO signal assertion from the User port overrides selections from other control
modes, which allows the MDXII unit to be run from the User port and serial port
simultaneously.
If you select the HALO feature at the time you program a recipe, you must turn on HALO
before you run that recipe. If you turn off HALO and you start this recipe, the output turns off
and the message "Halo Mode Incorrect" displays. Press the STOP switch to clear the message;
then turn on HALO and start the recipe again.
The opposite is also true. If HALO is turned off when you program the recipe, you must turn
it off before the recipe begins running.
Note: The HALO and VHALO features are independent and cannot be available in the same
unit.
5700262-R
36h 43h 45h 0D
'6' 'C' '5' CR
Checksum (Optional)
43h 36h 34h 31h
'C' '6' '4' '1'
Command Data - 'A'
Operation Overview
0A
LF
33h 30h 33h 35h
'3' '0' '3' '5'
Data - '0' Data - '5'
MDXII Power Supplies
38h 39h 0D 0A
'8' '9' CR LF
Checksum
5-19