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Automated Plasma Interface 458
Multiple Supplies
The Serial Communication Link supported by the CNC can also be extended to multiple power
supplies.
This unique feature is implemented through the use of the serial link and I/O points. It is assumed
that the all systems are configured similarly and will be used simultaneously. If any of the selected
power supplies has a fault, the fault must be cleared before the cut can begin.
Specific hardware and software versions for both the control and the power supply are required.
Please refer to the power supply manual for additional information on operation and installation.
Inputs and Outputs
Raise 1-4 and Lower 1-4
The Raise / Lower inputs will be used to control the Integrated Command™ THC lifters on multi-
dropped supplies for the selected process.
Note: When using this feature with the Sensor™ THCs rather than the Integrated Command™ THCs,
the Sensor™ THC Torch Raise and Torch Lower commands for the selected process may be made
through the software softkeys or through the use of these external inputs to the control.
Cut Sense 1-4
THC Cut Sense Input (arc on feedback) is used to verify that the plasma torch or marker tool has
established the arc for the selected torch. This indicates to the control that motion can begin.
Ready to Fire PS 1-4
This signal is an output from each supply and is used in multiple plasma systems. It notifies the CNC
that the THC has completed the IHS cycle and Preflow is complete. This indicates that the torch is
ready to fire. On the supply this signal is used along with the CNC Plasma Sync Input. The CNC Hold
Ignition output is connected to the supply “CNC Plasma Sync” inputs. When all configured supplies
return active “Ready to Fire” signals, the “Hold Ignition” signals are removed.
Hold Ignition
The Hold Ignition Output is used to delay ignition of the external plasma supply and allow the
individual supplies to complete Preflow and IHS before torch ignition. For this application, the Hold
Ignition would be tied to the Plasma Sync Inputs for multi-dropped supplies.
Reduce Current
Used with the supply to switch the plasma to low current mode. This signal is functionally different
from the Torch Height Disable Output in that it is not active during the initial torch ignition, pierce, and
accelerate to speed after Plasma Start. For this application, the Reduced Current output would be
tied to the Corner Hold Inputs for multi-dropped power supplies.
The Corner Current Parameter located on the Plasma Setup Screen, is a user defined value for
setting the percentage of the corner current.
NOTE HD4070
®
: Proper mult-drop operation requires a Rev C or higher Breakout board in the
HD4070
®
as well as Rev K or higher control software in the HD4070
®
.