ArcGlide THC Instruction Manual 806450 271
B – ArcGlide THC Serial Communication Installation
Limitations
An ArcGlide THC that uses RS-422 serial communication has the following configuration limitations:
Real-time signals are not supported over serial RS-422 connections. Therefore, True Hole™ technology and other
interactive cutting commands and signals are not always supported. However, it is possible to implement True Hole
technology in some Command THC installations by using the discrete I/O signals in addition to the RS-422
connection.
It cannot be configured with an HPR plasma system that uses Hypernet for communication.
When the system is turned ON, only ArcGlide default values are used:
ArcGlide THC standard lifter setup (9.40-inch, 25-pound breakaway)
Loop gains for speed, position, and voltage
Puddle Jump and Transfer Height features are not available
There are no Automatic mode settings
The HMI can only be used for monitoring and manual control functions unless you have removed the jumper between
pins 14 and 15 in Connector A on the Plasma I/O split cable (Z) (223253). For more information, see Adjusting
ArcGlide parameters with the HMI on page 283.
RS-422 serial protocol
The serial protocol supports the 19,200 baud, 8 data, 1 stop, no parity format. It does not support the older Command
THC 9600 baud format. This basic protocol supports all Command THC instructions with the exception of the following:
Real Time revision (RR) returns the ArcGlide firmware revision number.
I/O revision (RI) returns the ArcGlide firmware revision number.
Error code (EC) returns the nearest equivalent Command THC error code.
Lifter test (LT) is not supported.
When the ArcGlide THC replaces a Command THC, the CNC receives error and status messages as Command THC
messages.
If the ArcGlide THC is installed in a new system, extensions to the serial protocol are available to allow programmers to
edit the parameter settings for the following:
Lifter setup: length, motor current, encoder counts
Speed setup: maximum, fast, slow, IHS
Loop gains: speed, position, voltage
Height settings: Crossover, Transfer, Cut, Pierce, Puddle Jump
Sample Voltage mode
HMI language
Relative kerf detect level
When the extended command set is used, both the CNC and the ArcGlide control module display ArcGlide error
messages. See ArcGlide THC Serial Communication Protocol on page 249 for the ArcGlide serial protocol command
set.
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