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Computer Weld Technology, Inc.
10702 Old Bammel N Houston Rd.
Houston, TX 77086
Phone: (713) 462-2118
Fax: (713) 462-2503
Email: [email protected]
ATC II
TM
AUTOMATIC TORCH CONTROL
Operation / Installation Manual
P/N: S8M5018
Revised: September 4, 2009
Table of Contents
4.0 ATC II OFF-LINE SERIAL TERMINAL PORT PROTOCOL...................................... 13
5.0 ATC II PROGRAMMABLE SEQUENCE PROTOCOL .............................................. 16
A.2 MICROSTEP MOTOR CABLE P/N: S3W5034......................................................... 28
A.3 VOLTAGE SENSOR CABLE P/N: S3W5044 ........................................................... 28
A.4 CURRENT SENSOR CABLE P/N: S3W5045........................................................... 29
1.0 OVERVIEW
The Computer Weld Technology Automatic Torch Control (ATC II
) is a compact, lightweight, weld torch manipulation control system comprised of the micro-controller based Automatic Torch Control
(ATC II) and a stepper motor driven Linear Slide Assembly (LSA). This system is capable of providing independent control of all torch movements in the vertical plane.
The ATC II provides automatic torch Height control using Computer Weld Technology's patented Thru-
Arc
sensing technology. The Thru-Arc sensor provides two modes of Torch Height Control. Mode 4 provides Torch Height Control using Arc Voltage Control (AVC). Mode 5 provides torch height control using Arc Current Control (ACC). The entire Torch tracking information is derived from the welding arc.
The arc voltage and welding current is measured with an external voltage probe and Hall-Effect clamp on current sensor provided with the system.
The ATC II provides a user definable 50 sequence Programmable Logic Controller (PLC) with four 24vdc inputs and two N.O. relay contacts. Using the PLC the user can provide external program control and simple power source interface. A RS-232 serial port is provided for off-line programming and system configuration. The RS-232 port can also be used to remote control the ATC II.
The Automatic Torch Control (ATC II) provides the necessary command signals to the stepper motor powered drive to permit the selection of the following functions from the front panel of the ATC Control box.
CONTROL
RUN
TRACK
JOG
SPEED
GAIN
FUNCTION
Enable Slide Home and AVC/ACC operation
Enable/Disable Thru-Arc
AVC/ACC tracking
Jog the Torch slide position p or down
Control the speed of the slide
Provide sensitivity control for all tracking functions
The Linear Slide Assembly (LSA) is a stepper motor driven mechanical assembly that provides the motion for weld torch manipulation. The standard LSA provides 7” of vertical motion and has a weight capacity of 25 lbs @ 3” from the face of the carriage. The Torch Slide Assembly module can be installed in any position using the mounting bracket. The mounting bracket can be installed on the bottom or in the center of the back of the slide.
ATC II™ ENCLOSURE SPECIFICATIONS
Dimensions 6.62”H X 4.12”W X 8.75”L (168mm X 105mm X 222mm)
Weight 5.5 lbs (2.5kg)
Power Requirements 115 vac or 42 vac 50/60 Hz @ 220 va
Velocity
Motor Torque
0.2 - 15 inch/min
120 oz-in max (Holding Torque
LIGHT DUTY SLIDE SPECIFICATIONS
Dimensions
Max Travel
Weight
Velocity
Weight Capacity
13.25”H x 4.7”W x 3.5”D (336mm X 102mm x 89mm)
7.25” (184mm)
7 lbs (3.18kg)
0.2 – 1.5 inch/sec
10 lbs @ 3” from slide face
1
MEDIUM DUTY SLIDE SPECIFICATIONS
Dimensions 16.66”H x 3.38”W x 2.88”D (423mm X 86mm x 73mm)
Max Travel
Weight
Velocity
Weight Capacity
7.25” (184mm)
7 lbs (3.18kg)
0.2 – 1.5 inch/sec
25 lbs @ 3” from slide face
HEAVY DUTY SLIDE SPECIFICATIONS
Dimensions 17.08”H x 5.00”W x 2.63”D (434mm X 127mm x 67mm)
Max Travel
Weight
Velocity
Weight Capacity
7.25” (184mm)
9-1/2 lbs (4.32kg)
0.2 – 1.5 inch/sec
45 lbs @ 3” from slide face
2
2.0 INSTALLATION
The ATC Control assembly should be located to allow easy operator access to the front panel.
The control is provided with four 10-32 captive PEM nuts located on the left side of the enclosure. Figure 1 shows the physical mounting dimensions.
FIGURE 1 - Control Physical Dimensions
3
2.2 ATC SLIDE ASSEMBLIES
See Figure 2, 3 and 4 for mounting locations and physical dimensions for light, medium and heavy duty slides.
FIGURE 2- Light Duty Slide Physical Dimensions
4
FIGURE 3- Medium Duty Slide Physical Dimensions
5
FIGURE 4- Heavy Duty Slide Physical Dimensions
6
2.3 CABLES
Perform the following to install the cables and sensors for the ATC II.
WARNING
Do not connect or disconnect the SLIDE MOTOR CABLE from the Slide or ATC II back panel with Power Applied to the control. Doing so will damage the control and slide assembly.
Connect the ATC Slide Motor Cable to the Motor mating connector on the rear of the control enclosure (Fig 5) and to the Motor mating connector on the Slide Assembly.
Mount sensor (Fig 5). The two RED dots should point toward the power supply for GMAW applications and toward the work piece for GTAW and Plasma applications. Connect the Current Sensor Cable to the Sensor Cable Connector and to the CURRENT mating connector on the rear panel of the ATC II (Fig 5).
CABLE
CONNECTOR
NEGATIVE WELDING
CABLE TO NEGATIVE
TERMINAL OF
WELDING POWER
SUPPLY
FIGURE 5 - Current Sensor Installation
RED DOTS
Connect the RED and BLACK leads of the Voltage Sensor in accordance with Table
1 below. Connect the lead for the Electrode as close as possible to the welding torch.
Connect the Voltage Sensor Cable to the mating connector on the Voltage Sensor and connect the other end to the ATC II rear panel VOLTAGE Connector.
APPLICATION RED (+) LEAD BLACK (-) Lead
P-GMAW Electrode Work
GTAW Work Electrode
P-GTAW Work Electrode
PAW Work Electrode
P-PAW Work Electrode
Table 1 - Voltage Sensor Installation
If the ATC II is to be used to control the welding power source connect the Remote
Control Cable to DB9 I/O connector on the rear panel of the ATC II (Fig 6). (Remote
Control Cable is not part of the base unit and must be purchased separate) Refer to
Appendix D for samples interconnect drawings for various weld power supplies.
7
Connect the ATC II (Fig 6).
This completes the cable installation.
BLACK WIRE
1/2” RING
TERMINAL
VOLTAGE
CABLE
P/N: S3W5044
RED WIRE
1/2” RING
TERMINAL
CURRENT CABLE
P/N: S3W5045
VOLTAGE SENSOR
P/N: S3A5053
VOLTAGE CABLE
P/N: E3W5045
ATC II
ENCLOSURE
P/N: S3A5127
TERM CABLE
P/N: S3W5050
MIRCOSTEP
CABLE
P/N: S3W5034
POWER CABLE
P/N: S3W5043
LINEAR SLIDE
FIGURE 6 – System Layout
8
CURRENT SENSOR
P/N: X3Q5010
The ATC Control has a DB-9S remote control connector located on the rear panel of the ATC
II (Fig 6). The remote inputs can be used to provide remote control of the ATC II and the outputs can be used to control a device through the ATC II (such as Power Source Weld
Contactor to start the weld process). These functions are based on the configuration of the
ATC II PLC Program. Figure 7 shows the pin-out for the remote connector and the
Input/Output configuration for the I/O port.
REMOTE I/O
7
3
8
4
9
5
1
6
2
R1
4.7K 1/2W
1
A
C
16
R2
4.7K
TYPICAL INPUT CIRCUIT
5
8
+ 1
16
RELAY DC24V
TYPICAL OUTPUT CIRCUIT
FIGURE 7 - Remote Input/Output Configuration
2.4 REMOTE CONTROL FUNCTIONS
All input and output functions are defined and controlled using he ATC II PLC Program
The following is a functional description of the remote control specifications:
PIN
1
2
3
4
FUNCTIONS
INP1 - 24 vdc remote input 1 (24vdc @ 5.0 ma. Active High)
INP2 - 24 vdc remote input 1 (24vdc @ 5.0 ma. Active High)
INP COM - Digital input signal common
INP3 - 24 vdc remote input 1 (24vdc @ 5.0 ma. Active High)
5
6
7
8
9
INP4 - 24 vdc remote input 1 (24vdc @ 5.0 ma. Active High)
CR1-A - CR1 relay Normally Open (N.O.) output (Default weld contactor)
CR1-B - CR1 common output (Default Weld contactor)
CR2-A - CR2 relay Normally Open (N.O.) output (Default arc active)
CR2-B - CR2 common output (Default arc active)
9
3.0 OPERATION
3.1 OPERATIONAL SEQUENCES
AVC
The following operational sequence is based on the DEFAULT PLC program provided with the unit. The operation may vary based on user defined PLC code. Refer to Section 5 for
PLC programming information. Figure 8 shows the location of the operator controls.
DISPLAY
AVC SETTING
CONTROL
SPEED
CONTROL
GAIN
CONTROL
RUN
SWITCH
SLIDE JOG
SWITCH
TRACKING
SWITCH
POWER
SWITCH
FIGURE 8 - Front Control Panel Layout
To operate the control, turn the main power switch to the "Up" position. The power switch will illuminate indicating that the unit is operational. The AVC Display will illuminate and display the active AVC setting.
10
To initialize the slide, turn the "RUN" switch to the "On" position. The Torch slide will move to the upper slide limit switch and stop. Turn the “RUN” switch to the “Off” position. This operation must be performed every time the ATC II is powered on.
The front panel controls will remain inoperable until the slide is initialized.
To change the Slide speed, adjust the "SPEED" control.
To change the AVC set point value adjust the "AVC" control.
To move the Torch Slide use the "JOG" switch. Holding the "JOG" switch in the
"UP" direction will move Torch Slide in the up direction. Holding the "JOG" switch in the "DOWN" position will move the torch slide in the down direction. The "JOG" switch is disabled when the "TRACKING" Switch is on and the "ARC IS ACTIVE".
How to Set and Save the Torch Start Weld Position.
1. With the "RUN" switch in the "OFF" position use the "JOG" Switch to move the Torch to the desired START WELD position.
2. To Save the START WELD position set the “RUN” switch to the “ON” position. By performing this operation the ATC will store the START WELD position of the torch slide.
After the START WELD position is saved it can be restored to the saved START
WELD position by toggling the “RUN” switch to the “Off” position. After the START
WELD position has been restored move the "RUN" switch back to the "ON" position.
To operate the ATC II without saving a START WELD position place the “RUN” switch in the “ON” position.
Using the “JOG” switch set the torch to the desired weld start position.
To enable the AVC tracking set the “TRACKING” switch to the “ON” position.
Start the welding arc and the AVC control will begin operation when the arc is detected. To adjust the AVC set point, adjust the “AVC” control to the desired level.
To halt the AVC torch tracking toggle the “TRACKING” switch to the “OFF” position.
When the Tracking switch is “OFF” the “JOG” switch will be enabled and the operator can manually adjust the torch position.
To start a welding sequence using the DEFAULT PLC PROGRAM:
Turn the "RUN" switch to the "ON" position.
The ATC II will activate the CR1 output relay (connected to the Power Source
Contactor through the optional Remote I/O Cable) and will wait for an arc on condition.
An arc on condition is set when the current is greater than 8 amps and the voltage is greater than 3.0 volts as detected by the Voltage and Current Sensor
of the ATC II. The arc active signal will be reset if current or voltage falls below preset values and tracking will stop.
When the arc is active CR2 will be set.
11
To activate the selected tracking mode set the "TRACKING" switch to the "ON" position. To disable the selected tracking mode set the "TRACKING" switch to the
"OFF" position.
While tracking the "GAIN" control can be used to adjust the sensitivity of the tracking.
If the Torch is moving UP and DOWN too much the GAIN may be too HIGH. If the
Torch moves too little the GAIN is too LOW. Adjust the GAIN until the Torch movement is stable.
NOTE: If excessive "GAIN" is used the torch slide will over-correct and the weld bead will wander. Decrease the gain to obtain stable torch tracking.
The control will start the tracking from the last position as determined when the "RUN" switch is set to the "ON" position.
When the "TRACKING" switch is set to the "OFF" position the AVC control will be disabled. When the "TRACKING" switch is in the "OFF" position the Torch position can be moved by activating the "JOG" switch in the "UP" or "DOWN" position. When the "JOG" is returned to the center position the control will use the new torch position as the new start location.
12
4.0 ATC II OFF-LINE SERIAL TERMINAL PORT PROTOCOL
4.1 SERIAL TERMINAL PORT INTERFACE
The RS-232 communications port is used to off-line program the ATC II PLC sequences drive motor parameters and the operating parameters for the ATC II. The Protocol is a simple ASCII command string that allows the user to up-load or download the various parameters. The serial port is configured for the following data format:
Baud Rate: 9600, Full Duplex
Word Length: 8 Data Bits, One Stop and no parity
Hand Shaking: None
The Protocol consists of a command string and optional data bytes. The command string is an
Alpha character and option number followed by a "=" or "?" followed by optional data and terminated with an ASCII "cr" (0dh). The "=“ will indicate that data is being sent to the select parameter by the host controller. The "?" will indicate a request for data from the ATC II to the
Host controller. If the host is up-loading data to the ATC II the data will be placed after the "=" character and will be an ASCII string terminated with an ASCII "cr" (0dh). The following is an example of sending a new step motor speed to the ATC II:
V1=1000(cr) - Sent from Host
To read the ATC II step motor speed, send the following command:
V1?(cr)
1000(cr)
- Sent from Host
- Received from ATC II
The following is a summary of the RS-232 serial Commands supported by the ATC II:
COMMAND DESCRIPTION
A1 - A4 Read ATC II Analog Inputs. The following is a summary of the analog command functions:
A1 - AVC Control Pot input (1 to 255 = 0.01 to 25.5 on the display).
A2 - Speed Pot input (255 = 5.12 vdc Step Rate = Value * Rate Multiplier (M5)).
A3 - Not Used.
A4 - Not Used.
A5 - Not Used.
A6 - Gain Pot analog input (255 = 5.12 vdc).
A7 - Current sensor excitation current (255 = 255 ma.)
A8 - Set motor Excitation current reference (255 = 2.55 amps).
13
M0 - M5 Set system control mode functions:
M0 - Set programmable sequence number to value.
M1 - Read Switch input status (1 = on, 0 = off)
M2 -
BIT 0 = Remote INP1 (value= 1).
BIT 1 = Remote INP2 (value= 2).
BIT 2 = Slide Home Limit (value= 4).
BIT 3 = Remote INP4 (value= 8).
BIT 4 = "JOG UP" switch input (value= 16).
BIT 5 = "JOG DOWN" switch input (value= 32).
BIT 6 = "RUN" switch input (value= 64).
BIT 7 = “Track” switch input (value= 128).
Set output relays CR1 - CR2 (1=on, 0=off).
BIT 0 = Relay CR1 (value= 1)
BIT 1 = Relay CR2 (value= 2)
M3 - Set Step motor current value #.## amps (.55 - 2.55 amps).
M4 - Set Current sensor excitation value (1 - 255).
M5 - Set motor step rate multiplier value. Motor speed = [1 / (Value x Rate)].
Step motor scale factor (Steps / Distance). M6 -
M7 - Analog input automatic scan starting parameter (0 - 5). When the value is set to zero the front panel pot values will be used. To disable the pot controls set the scan value to 6. This will enable off-line programming of the oscillator parameters.
M8 - CWT LAN ID number. Setting a LAN ID value will disable the RS-232 communications and enable the LAN communications routines (Range 1 - 4).
M9 - Enable ATC II auto sequence routines.
Command Function
M9=1 Enable Auto sequence input
M9=2
M9=3
Clear Auto sequence input
Set Initialize sequence input
M9=4
M10- Tracking gain.
Calculate maximum position based on external limit switch inputs.
M11- Set the Auto Arc On detection current level (0 – 255 amps).
M12- Enable/Disable tracking data up-load (1 = Enable, 0 = Disable).
M13- Set Tracking mode: 0 = Center line Tracking.
1 tracking.
= Tracking width side with
********* Firmware Version 1.22 or higher *********
4 = AVC torch height control (Ver 1.22 or greater)
5 = ACC Torch Height control (Ver 1.22 or greater)
M14- Depth of penetration value used for tracking modes 1 - 2. The value controls the depth of penetration of the arc into the sidewall of the welding bevel.
M15 Torch height correction sample time period (10 – 255 msec)
S1 - S50 Programmable Sequence Commands - See Section 5.0 for description of programmable sequence commands and data format.
14
V1 - V9 Write/Read double byte variables:
V1 = Motor speed value.
V2 = Current Drive Position (Scaled step motor count).
V3 = Move position value. Decrement by the step motor drive command.
V4 = Maximum oscillator position limit.
V5 = Slide center position.
V6 = Slide Oscillator width.
V7 = Maximum Slide Oscillation width limit used by the adaptive width tracking mode 1.
V8 = Minimum Slide Oscillation width limit used by the adaptive width tracking mode 1.
V9 = Current torch to work position.
V10= Maximum cross seam correction limit.
V11= Maximum torch to work correction limit.
***************** Firmware Version 1.22 or higher *******************************
V12= Torch to work reference voltage used in tracking mode 4 and 5
V13= Torch to work reference current used in tracking mode 4 and 5
V14= Actual Arc Voltage value (0.1 volt increments, 100 = 10.0 volts)
V15= Actual Arc Current value (1 amp increment, 100 = 100 amps)
In addition to the terminal commands the ATC II supports several special control key functions.
These functions are used to save the programmed data in the EEPROM and to clear any pending terminal commands. The following commands are generated by pressing the CTRL" and specified letter key at the same time. When sending any of the following control codes, the ATC II will respond with an ASCII "CR". The following is a summary of the special control character function supported by the ATC II:
Control Code Command Function
^W Save current parameters and sequence values to ATC II EEPROM
^C
^S
^R
Reset the terminal serial port and clear any pending terminal commands
Up-load stored sequence commands from ATC II to terminal.
Load sequence commands from EEPROM to RAM
15
5.0 ATC II PROGRAMMABLE SEQUENCE PROTOCOL
The ATC II programmable sequence consists of a 3-byte command. The First byte is the command byte followed by a two-byte value:
{Byte1}, {Byte2 (MSB)(:)Byte3 (LSB)}
The value bytes must be set even if not required by the command. The value bytes may be branch addresses or real data passed to the selected function. The Command and value must be separated by a comma. The MSB byte and LSB byte of the value may be separated by a colon (":"). The colon will cause the MSB and LSB byte to concatenate to form a single twobyte value.
When setting MSB and LSB bytes for specific command function the MSB and LSB byte may be separated by a ":" or the total value may be specified by the decimal equivalent of the two bytes. To set the decimal value for the MSB and LSB bytes use the following equation:
Decimal Value = (MSB x 256) + LSB
The following is an example of how to set sequence 4 to the "SWITCH ON" command (1) and branch to sequence number 10 when "OFF" (MSB) and to test switch input 1 (LSB):
Decimal Value = (MSB x 256)+LSB = (10 x 256)+1 = 2561
Decimal Command sent to ATC II: S4=1,2561
Optional Command format: S4=1,10:1
When Setting / Resetting the relay outputs the individual relays are selected by setting the decimal value for each relay and use the result as the value for the command. The following is an example of programming sequence 5 to set relay CR1 and CR2 using the "SET RELAY" command (2):
Decimal Value for CR1 = 1 and CR6 = 3
Decimal Value = 1 + 2 = 3
Command sent ATC II: S5=2,3
16
The following is the decimal value for individual bits used for the relay outputs and switch inputs:
BIT NUMBER DECIMAL RELAY
INP1
INP2
N/A
INP4
N/A
N/A Switch
N/A
“TRACK” Switch
The following is summary of the available commands and the required values:
COMMAND DESCRIPTION
Example: S20=0,0 ;Skip sequence - No operation. if switch is "OFF". If MSB is zero, function will wait for switch "ON" condition then increment to next sequence.
Example 1:
Example 2:
S20=1,0:1
S20=1,40:1
;Wait for input 1 "ON".
;If input 1 is "OFF" branch to SEQ40. If "ON" increment to next sequence
3 switch is "ON". If MSB is zero, function will wait for switch "OFF" condition then increment to next sequence.
Example 1:
Example 2:
S20=2,0:1
S20=2,40:1
;Wait for input 1 "OFF".
;If input 1 is "ON" branch to SEQ40. If "OFF" increment
to next sequence
SET RELAY - Set relay output specified by LSB byte (CR1 = 64 and CR2 = 128).
Example 1:
Example 2:
S20=3,2
S20=3,3
;Set CR2 relay output.
;Set CR1 and CR2 relay output
4 CLEAR RELAY - Clear relay output specified by LSB byte (CR1 = 64 and CR2 =
128).
S20=4,2
S20=4,3
;Reset CR2 relay output.
;Reset CR1 and CR2 relay output
Example 1:
Example 2:
specified is in 10 msecond increments. (Example: 13,50 Set delay time to 0.50
seconds)
Example: S20=5,20 ;Delay for 0,20 seconds.
17
Auto Execute input is not active branch to sequence number specified by the MSB. If
MSB is 0 the function will wait until the input becomes active. If input is active the function will branch to the sequence number specified by the LSB byte. If the LSB is
0 the function increment to the next sequence.
Example: S20=6,10:20 ;If the auto active flag is set jump to SEQ 20 else jump to
7 INITIALIZE - If the Initialize input is active branch to LSB sequence. If the Initialize input is not active branch to sequence number specified by the MSB. If MSB is 0 the function will wait until the input becomes active. If input is active the function will branch to the sequence number specified by the LSB byte. If the LSB is 0 the function increment to the next sequence.
Example: S20=7,10:20 ;If the initialize flag is set jump to SEQ 20 else jump to SEQ
10.
Example: S20=8,0 ;Clear Initialize Flag.
Example:
Example:
S20=9,0 ;Halt current move command and stop motor drive.
S20=10,20 ;Set motor speed to low speed ( [1 / (Value * Rate)] ).
Example: S20=11,1000 ;Set current position to 1000. register and increment to next sequence.
Example: S20=12,0 ;Save current position.
14 increment to next sequence.
Example: S20=13,0 ;Restore save position and move oscillator to the saved position.
MOVE TO POSITION - Move to position and increment to next sequence.
Example: S20=14,1000 ;Move oscillator to position specified.
15 SET MAXIMUM POSITION - Set maximum position limit to value specified.
Example: S20=15,10000 ;Set oscillator maximum to position 10000.
Example: position.
S20=16,0 ;Load current oscillator position to Max position.
18
Example: S20=17,100 ;Jog current position 100 steps in the CW direction. new position.
Example: S20=18,100 ;Jog current position 100 steps in the CCW direction.
21
20 is set the function will jump to the selected sequence number if the move is not complete. If the LSB byte is zero the function will wait for the move to be completed then increment to the next sequence or branch to the sequence number set by the
LSB.
Example 1:
Example 2:
S20=19,0 ;Wait for oscillator move complete
S20=19,40:0 ;Is oscillator move complete? No - Branch to SEQ 40
SET LOOP COUNTER - Load selected loop counter (0-4) with starting value. MSB byte is the value to load and the LSB byte is the selected counter. There are 5 Loop counters available.
Example: S20=20,25:1 ;Load Loop counter 1 with a value of 25.
INCREMENT LOOP COUNTER - Increment the selected counter (0 - 4) and set the condition code register. The LSB byte selects the loop counter to Increment.
Example: S20=21,1 ;Increment Loop counter 1 and set condition code register.
23
24 the condition code register. The LSB byte selects the loop counter to decrement.
Example: S20=22,1 ;Decrement Loop counter 1 and set condition code register.
CLEAR LOOP COUNTER - Clears the selected loop counter (0 - 4). The LSB byte selects the desired loop counter to be cleared and sets the condition code register.
Example: S20=23,1 ;Clear Loop counter 1 and set condition code register.
JUMP TO SEQUENCE - Jump to sequence specified by LSB byte.
Example: S20=24,40 ;Jump to sequence S40.
26
27 sequence subroutine must be terminated with a return from subroutine command
(32). The ATC II allows nesting of up to 5 subroutines. All commands may be used in subroutines.
Example: S20=25,40 ;Jump to subroutine at sequence S40.
RETURN FROM SUBROUTINE - Returns the sequence counter to the "jump subroutine " sequence number plus 1. If a return subroutine command is executed with out a "jump subroutine " the sequence counter will be incremented to the next sequence.
Example: S20=26,0 ;Return from subroutine.
COMPARE VALUE TO POSITION - Compares the value (MSB, LSB) to the current position and set the condition code register. The comparison is a subtraction of the current position from the command value (CURRENT POSITION - COMMAND
19
28
Example: S20=27,1000 ;Compare current position to 1000 and set condition register.
COMPARE SWITCH INPUT - Compares the current ATC II switch inputs to the binary value specified in the LSB byte (SWITCH - VALUE) and sets the condition code register.
Example: S20=28,3 ;Compare input to 3 (Input 1 and 2 active) and set
condition code register.
VALUE).
Example: S20=29,10:1 ;Compare Loop counter 1 to 10 and set condition code registers.
31
30 BRANCH EQUAL - Branch to sequence specified by LSB byte as a result of the previous parameter value not being equal to command value or not equal zero. As specified by the condition code register. If not zero increment to next sequence number.
Function: (Parameter != Compare) then Branch to Seq #
Example: S20=30,40 ;If comparison parameter is not equal to value branch to
SEQ 40.
RANCH IF LOWER - Branch to sequence specified by LSB as a result f the previous parameter value being less than the command value. As specified by the condition code register. If not less than stored value increment to next sequence number.
Function: Parameter < Compare then Branch to Seq #
Example: S20=31,40 ;If comparison parameter < value branch to SEQ 40.
previous parameter value being greater than the command value. As specified by the condition code register. If not greater than parameter value increment to next sequence number.
Function: Parameter > Compare then Branch to Seq #
Example: S20=32,40 ;If comparison parameter > value branch to SEQ 40.
34 previous parameter value being equal to the command value (Note: result of comparison is zero). As specified by the condition code register. If not equal to parameter value increment to next sequence number.
Function: Parameter = Compare then Branch to Seq #
Example: S20=33,40 ;If comparison parameter = value branch to SEQ 40.
BRANCH IF HIGHER OR EQUAL - Branch to sequence specified by LSB byte as a result of the previous parameter value being greater than or equal to the command value. As specified by the condition code register. If not greater than command value increment to next sequence number.
Function: Parameter >= Compare then Branch to Seq #
20
35
Example: S20=34,40 ;If comparison parameter => to value branch to SEQ 40.
BRANCH IF LESS THEN OR EQUAL - Branch to sequence specified by LSB byte as a result of the previous parameter value being less than or equal to the command value (Note: result of comparison is zero). As specified by the condition code register.
If not equal to parameter value increment to next sequence number.
Function: Parameter <= Compare then Branch to Seq #
Example: S20=35,40 ;If comparison parameter <= to value branch to SEQ 40.
speed, and dwell parameters. oscillation.
center position. oscillation.
byte. The following are the valid tracking mode commands: 0 = Centerline tracking,
1 = Width control tracking, 2 = Right side tracking, 3 = Left side tracking.
Example 1: S20=38,0
Example 2: S20=38,1
Example 3: S20=38,2
Example 4: S20=38,3
Start tracking using the centerline mode
Start tracking using the width mode
Start tracking using the Right side mode
Start tracking using the Left side mode
Example: S20=39,1 Disable center line tracking active set CR1,. If the [LSB] byte specified input is inactive reset CR1.
Example: S20=38,1 ;Set/Reset CR1 based on input 1 status active set CR2,. If the [LSB] byte specified input is inactive reset CR2.
Example: S20=39,1 ;Set/Reset CR2 based on input 1 status
If the [LSB] input is active start the Oscillator. If the [LSB] byte specified input is inactive stop the oscillator.
Example: S20=40,1 ;Start/Stop the oscillator based on input 1 status
[LSB] specified input. If the [LSB] input is active, start the tracking mode specified by the [MSB] byte. If the [LSB] byte is inactive disable the tracking function. The following are the valid tracking mode [MSB] values: 0 = Centerline tracking, 1 = Width control tracking, 2 = Right side tracking, 3 = Left side tracking.
Example 1: S20=43,0:1
Example 2: S20=43,1:1
Example 3: S20=43,2:1
Example 4: S20=43,3:1
If INP 1 is active start tracking using the centerline mode
If INP 2 is active start tracking using the width mode
If INP 1 is active start tracking using the Right side mode
If INP 2 is active start tracking using the Left side mode
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44
45
JOG CW ON/OFF - Jog the oscillator center position in the CW direction by the value specified in the [MSB] byte. The [LSB] specifies the input to test. If the [LSB] specified input is active jog the center position by the value specified in the [MSB] byte. If the [LSB] byte is inactive the change center position is unchanged.
Example: S20=41,10:1 ;If INP 1 is active increment center position 10 steps in the CW direction
JOG CCW ON/OFF - Jog the oscillator center position in the CCW direction by the value specified in the [MSB] byte. The [LSB] specifies the input to test. If the [LSB] specified input is active jog the center position by the value specified in the [MSB] byte. If the [LSB] byte is inactive the change center position is unchanged.
Example: S20=42,10:1 ;If INP 1 is active increment center position 10 steps in the CCW
direction
46 WAIT ARC ON CONDITION - Wait for valid arc condition defined by arc voltage greater then 2.5 volts and current greater then 10 amps. If MSB byte is set the function will branch to the selected sequence number while the ARC ON Flag is clear.
If the LSB is set and the "ARC ON" flag is set the function will branch to the specified sequence. If the LSB is zero the function will increment to next sequence.
Example 1: S20=46,0
Example 2: S20=46,40:30
Wait for Arc Active.
If Arc is not active branch to SEQ 40. If Arc is active branch to SEQ 30 used to set a default width Pot value when the auto scan function is set to 5 to disable user Pot controls.
Example: S20=47,20 ;Set oscillation width to LSB value.
************ Only Available In Firmware Version 1.21 Or Greater *************
48 SET RIGHT DWELL - Set oscillation Right Dwell control to [LSB] (0 - 255) value. This function is used to set a default Right Dwell Pot value when the auto scan function is set to 5 to disable user Pot controls.
Example: S20=48,20 ;Set oscillation Right Dwell to LSB value.
50
51 function is used to set a default Left Dwell Pot value when the auto scan function is set to 5 to disable user Pot controls.
Example: S20=49,20 ;Set oscillation Left Dwell to LSB value.
SET CENTER DWELL - Set oscillation Center Dwell control to [LSB] (0 - 255) value.
This function is used to set default Center Dwell Pot value when the auto scan function is set to 5 to disable user Pot controls.
Example: S20=50,20 ;Set oscillation Center Dwell to LSB value.
SET TRACKIN GAIN - Set Cross Seam Tracking Gain control to [LSB] (0 - 255) value. This function is used to set default Tracking Gain Pot value when the auto scan function is set to 5 to disable user Pot controls.
Example: S20=51,20 ;Set Tracking Gain to LSB value.
********************************
Firmware Version 1.22 or Higher
*********************************
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52 SET VOLT REFERANCE - Set Voltage reference to the value and increment to the next sequence. This value is used as a reference for torch height control tracking mode 4 or 5. The units are in 0.1-volt increments (i.e. 100 = 10.0 volts)
Example: S20=52,230 ;Set Torch tracking voltage to 23.0 volts. the next sequence. This value is used as a reference for torch height control tracking mode 4 or 5. The units are in 1-amp increments (i.e. 100 = 100 amps).
Example: S20=53,220 ;Set Torch height to 220 amps.
54 TOUCH-RETRACT – This command provides an automatic touch retract torch routine. The [MSB} byte sets the retract distance and the [LSB] sets the step down increments. When this command is executed the Torch slide will be move down until the sensed arc voltage falls below 0.8 volts. The command will then halt the down ward motion and back up the number of steps set in the [MSB] byte. This routine requires an external voltage source be applied to the torch and is normally used with
GTAW application.
Example: S20=54,100:2 ; 100 step retract and 2 step down increment .
56 external N.C. upper limit switch to indicate home position. The [LSB] byte specifies the remote input used to indicate the Home position. This command will set the current slide position to the user defined V4 max position limit and will move the slide up until the selected remote input [LSB] is inactive or the max position step count has been reached.
Example: S20=55,1 ;Home vertical slide using INP1 as home limit.
SET VOLT REF TO POT - Set Volt reference, for torch height tracking, to the Pot value specified by the [LSB]. This function is used to set torch Tracking reference voltage to the value controlled by the selected control panel pot. The auto scan function must be enabled. The [LSB] sets the control pot that is used (0 = A1… 5
=A6).
Example: S20=56,1 ;Set Volt Reference to the Width Pot.
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57
58
SET CURRENT REF TO POT - Set Current reference, for torch height tracking, to the
Pot value specified by the [LSB]. This function is used to set torch tracking reference current to the value controlled by the selected control panel pot. The auto scan function must be enabled. The [LSB] sets the control panel pot that is used (0 = A1…
5 =A6).
Example: S20=56,3 ;Set Current Reference to the Center Dwell Pot.
MOVE SLIDE CW BY INPUT VALUE – Move slide in CW direction based on Input
Value specified by the [LSB] at the speed specified by the [MSB]. This function moves the slide in the CW Direction when the Input Value is equal to the Value in the [LSB] at the speed indicated in the [MSB].
Example: S20=58,200:16 ;If Input Value Equals 16 (Input 5 is Active) Move
Slide Down at Speed of 200.
MOVE SLIDE CCW BY INPUT VALUE – Move slide in CCW direction based on
Input value specified by the [LSB] at the speed specified by the [MSB]. This function
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Example: S20=58,200:16 ;If Input Value Equals 16 (Input 5 is Active) Move
Slide UP at Speed of 200.
As shipped from the factory the ATC II has a basic operation PLC program. The PLC code allows the user to start/stop the welding process using the "RUN" switch. By connecting the
CR1 relay output to the "Gun Switch" input on the wire feeder the ATC II will activate the welding system. When an arc is established the oscillator will be activated. The centerlinetracking mode will be activated when the operator activates the "TRACKING" switch. The
PLC code is divided into three sections. The first section is the non-welding routine and consists of Sequence 1 - 5. This section checks the various input control switches and will jog the oscillator center, start/stop the oscillator and start the welding sequence. The second section is the welding routines. When the "RUN" switch is active the CR1 relay is set and the
PLC code will wait for an arc on condition. When the arc is established the oscillator will automatically start. When the "TRACKING" switch is activated the ATC II will begin centerline tracking. To change the mode of tracking the user will need to change line S10 to reflect the desired tracking mode. The operator can also jog the oscillation center position using the
"JOG" control switch. The following is a listing of the default PLC program provided:
;======== ATC II AVC TRACKING SYSTEM CONFIGURATION PARAMTERS ========
;
;
;
;
CR1 - Cycle Start Latch Relay Output
CR2 - ARC Active Travel Start Relay
INP1 - Not Used
INP2 - Not Used
;
;
INP3 - Slide Home Input
INP4 – Not Used
;
;=========================== ATC II Default PLC ===========================
S1=25,30 ; Jump to Initialize Subroutine S30
;=============== Idle Switch Test Routine===================================-
S2=25,25 ; Jump to Jog Up/Down Subroutine S25
S3=1,2:64 ; IS RUN SWITCH ON - NO GO TO SEQ 2
;================== WELD "ON" ROUTINE =================================
S4=12,0
S5=3,1
; Save Current Position
; SET RELAY 1 "CYCLE ON"
S6=1,16:64
S7=25,25
S8=46,6:9
; Is RUN Switch still active? No End Weld
; Check JOG switch inputs
; IS ARC ACTIVE? NO - GO TO S8 AND RECHECK
;------------------- ARC Active Scan Routine --------------------------
S9=3,2
S10=43,4:128
S11=2,13:128
S12=25,25
S13=56,0
; SET ARC ACTIVE RELAY CR2
; START/STOP CENTER LINE TRACKING BASED ON SWITCH?
; IF Tracking on THEN skip Jog Switch Test
; ELSE - Check for Jog Switch Command
; Load A1"Volt" pot to Volt Reference
; IS WELD SWITCH STILL ON - NO GOTO S16 END WELD
; IS ARC STILL ACTIVE - NO GOTO S22 ELSE GOTO S16
S14=1,16:64
S15=46,16:9
;=================== END WELD CYCLE ==================================
S16=39,4 ; STOP CENTER LINE TRACKING
S17=4,2
S18=2,6:64
; RESET CR2 "ARC ACTIVE" RELAYS
; Wait for Input Off
S19=3,1
S20=10,255
S21=13,0
S22=19,0
S23=24,2
; Reset "Cycle On" Relay
; Set Speed
; Restore Position
; Wait for Move Complete
; JUMP TO SEQ 2
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;=============== Jog Up/Down Subroutine ===================================
S25=58,200:32 ; IF CW SWITCH ON - JOG CW
S26=5,5
S27=59,200:16 ; IF CCW SWITCH ON - JOG CCW
S28=26,0 ; Return from Subroutine
;=============== Initialize Routine =========================================-
S30=1,64
S31=4,3
S32=5,1
; Wait for "RUN" switch on
; Reset all Relays
S33=55,4
S34=19,0
S35=11,1
S36=2,64
S37=26,0
; Home Slide and wait for Input 3
; Wait for Move Complete
; Reset position Register
; Wait for Run Switch Off
; Return from Subroutine
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APPENDIX A ATC II SYSTEM DRAWINGS
A.1 ATC II CONTROL ENCLOSURE
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A.2 MICROSTEP MOTOR CABLE P/N: S3W5034
A.3 VOLTAGE SENSOR CABLE P/N: S3W5044
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A.4 CURRENT SENSOR CABLE P/N: S3W5045
A.5 POWER CABLE P/N: S3W5043
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A.6 TERM CABLE P/N: S3W5050
A.7 REMOTE I/O CABLE P/N: E3W5045
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