Hypertherm HD4070 Rev.1 - Manual (Page 276)

APPENDIX E – COMMAND THC AND CNC SOFTWARE – SUPPLEMENTAL INFORMATION
e-2 HyPerformance HD4070 Instruction Manual
CommandTHC serial protocol
Commands can be sent over a serial link to control the function of the torch height control. The interface is 4 wire
RS422 on the Machine Interface Cable (pins (1) RX-, (20) RX+, (2) TX-, (21) TX+). The serial frame runs at 19200
baud, 8 data bits, 1 stop bit, and no parity. All bytes in a serial message are ASCII characters. A message consists
of a start of message character (>, 0x3E), 2 byte message ID (all message ID’s should be capitalized), variable
length data, 2 byte checksum, and end of message character (<, 0x3C). For example: to put the THC into remote
mode >RM1D0<. ‘RM’ is the message ID, ‘1’ is the data field, and 0xD0 is the checksum (2 hex digits sent as 2
ASCII characters). The response to an accepted command is (^, 0x5E) and the response to an invalid command is
(#, 0x23).
Some of the commands can be queried by using (?, 0x3F) as the data. For example: to query the actual arc
voltage >AV?D6<. The response to this query would be >AV100058<, which represents an actual arc voltage of
100.0 volts with a checksum of 0x58.
Errors can be retrieved over the serial link. There is a discrete output on the machine interface cable (THC Error
pins 14,33) which indicates an error has occurred. Using the command >CL8F< errors can be cleared and
retrieved. A typical response might be >ERR-Motor Current Fault46< or if there is no error (^, 0x5E) is returned.
Command listing:
Command ID Data Query Notes
Pierce Delay PD 0 – 9000 (0 to 9.000 seconds) yes Delay before motion output
Pierce Height Factor PH 50 – 300 (50% to 300%) yes Used to set pierce height
Preflow During IHS PF 0,1 (0 = off, 1 = on) yes Improves cycle time
IHS Stall Current SC 1 – 10 (1 = least force) yes Used to set stall force
IHS Speed IV 1 – 10 (1= slowest) yes Used to set IHS speed
IHS Test IH 0,1 (0 = run, 1 = test) no Perform IHS test
Nozzle Contact Active NC 0,1 (0 = off, 1 = on) yes Enable nozzle contact IHS
Machine Acceleration MA 0 – 9000 (0 to 9.000 seconds) yes Delay voltage control
Maintenance Mode MT No data no Maintenance mode
Auto Kerf AK 0,1 (0 = off, 1 = on) yes Disable voltage control in kerf
Actual Arc Voltage AV ? (query only) yes Returned value is 1/10 volts
Automatic Voltage Control AA 0,1 (0 = manual, 1 = auto) yes Voltage control or manual
Retract RE 0,1 (0 = full, 1 = partial) yes Full or partial retract
Retract Distance RH 0 – 8000 (0 to 8.000 inches) yes Must be in partial retract
Remote Mode RM 0,1 (0 = off, 1 = on) yes Must be ON to use serial link
IO Rev RI ? (query only) yes IO revision
RT Rev RR ? (query only) yes Real Time revision
Homing Speed HS 1 – 10 (1 = slowest) yes Home speed
Unit Conversion UN 0,1 (0 = inches, 1 = metric) yes Units
Lifter Test LT No data no Perform lifter test
Cut Height CH 0 – 1000 (0 to 1.000 inches) yes Used to set cut height
Arc Voltage Set-point VS 500 – 3000 (50.0 to 300.0 volts) yes Used to set voltage control
Step Up S+ No data no Move up fixed increment
Step Down S- No data no Move down fixed increment
Jog Up J+ No data no Continuous movement up
Jog Down J- No data no Continuous movement down
Clear Error CL No data no Clear error, send error string
Flush Buffers FL No data no Reset RX and TX buffers
Error code EC ? (query only) yes Send error code number