Voltage Arc Trip Level; Tcc Algorithm Enable - Advanced Energy Pinnacle 20 kW Manual

In addition to shipping with arc handling enabled, the Pinnacle ships with these arc handling
defaults: metal target, 50 V trip level. These settings provide the highest through-put with
minimal arc damage to metal targets. You can change these and other arc handling settings
through the Pinnacle Remote Active Panel or the serial port. But before changing any arc
handling settings, first take some time to understand them:

• Voltage arc trip level

• TCC algorithm enable

• Target type
– Metal
– Non-metal
– Custom
• Arc detect delay time
• Arc shutdown time
The following paragraphs describe what the arc handling settings are and how they might
interact with each other, with your system, and with your process.
Voltage Arc Trip Level
By setting the voltage arc (V-arc) trip level you are indicating the voltage threshold at which
the Pinnacle recognizes an arc. The best value for a voltage arc trip level is somewhere
between your process's normal operating voltage and the typical low voltage that occurs when
your system experiences a hard arc. The latter depends on your target type, but typical low
voltages for hard arcs are between 10 and 25 V. Thus a reasonable voltage arc trip level might
be 50 V. Note, however, that some target types experience hard arcs at 100 V, so do not
assume that 50 V is right for all processes. To set the V-arc trip level, use the ARC menu on
the Pinnacle Remote Panel or AE Bus/Profibus Command 10 (see Chapter 4).
TCC Algorithm Enable
When the Target Condition Cycle (TCC) algorithm is enabled and the unit receives an on
command, the Pinnacle microprocessor sets the arc detect time to 20 μs and initiates a series of
trials (or "steps") to reach your desired setpoint ("the final setpoint"). To begin, the
microprocessor sets an initial setpoint equal to 50% of the final setpoint. After 10 ms, the
microprocessor checks the output level and sets a new interim setpoint equal to 125% of the
output level. The microprocessor continues to check the output level and to set a new interim
setpoint (always 125% of the averaged output level) every 10 ms until the output level is equal
to 80% of the final setpoint. When 80% of the final setpoint is reached, the interim setpoint is
set equal to the final setpoint, and the TCC algorithm ends. You can enable TCC mode
through the ARC menu on the Pinnacle Remote Panel or through AE Bus/Profibus Command
79 (see Chapter 4).
Note: You cannot enable the TCC algorithm if you have already set up ramping recipes.
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Operation
Pinnacle™ 20 kW
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