INVERTER-TYPE WELDING POWER SUPPLY IS-120B- OPERATION MANUAL

Transcription

1 INVERTER-TYPE WELDING POWER SUPPLY IS-120B- OPERATION MANUAL CONTENTS INDICATOR WELD POWER READY START WELD TROUBLE TROUBLE RESET WELD WELDING POWER SUPPLY FINE SPOT - INVERTER IS-120B PULL PROGRAM MONITOR I/O COIL IN RS Special Precautions 1-1 to 5 2. Features Name and Functions of Each Section 3-1 to 6 4. How to Operate Screens 4-1 to Connection Procedures 5-1 to 3 6. Interface 6-1 to 5 7. Basic Operation Time Chart Maintenance 9-1 to Specifications 10-1 to Outline Drawing Troubleshooting 12-1 to 3 EC Declaration of Conformity Thank you for purchasing the Miyachi Technos IS-120B Inverter-type Welding Power Supply. This operation manual explains its method of operation and precautions for use. Before using, read this operation manual carefully. After reading, save it in a proper place where you can easily access to. I04M0607E-06

2 1. Special Precautions (1) Safety Precautions Before using, read "Safety precautions" carefully to understand the correct method of use. These precautions are shown for safe use of our products and for prevention of damage or injury to operators or others. Be sure to read each of them, since all of them are important for safety. The meaning of the words and symbols is as follows.! DANGER Denotes operations and practices that may imminently result in serious injury or loss of life if not correctly followed.! CAUTION Denotes operations and practices that may result in personal injury or damage to the equipment if not correctly followed.! These symbols denote "prohibition". They are warnings about actions out of the scope of the warranty of the product. These symbols denote actions which operators must take.! WARNING Denotes operations and practices that may result in serious injury or loss of life if not correctly followed. Each symbol with a triangle denotes that the content gives DANGER, WARNING or CAUTION to the operator.! DANGER Do not touch the inside of the Power Supply unnecessarily. Since very high voltages are applied to the inside of this Power Supply, it is very dangerous to touch it unnecessarily. You may touch it only when you replace the fuse or battery. When inspecting the interior of the Power Supply, be sure to turn off the power source of the Power Supply and wait for at least 5 minutes. Never disassemble, repair or modify the Power Supply. These actions can cause electric shock and fire. Do not do anything other than the maintenance described in the operation manual. 1. Special Precautions 1-1

3 ! WARNING Do not put your hands between the electrodes. When welding, keep your fingers and hands away from the electrodes. Do not touch any welded part or electrodes during welding and just after welding finished. The welded part of a workpiece, electrodes and arm are very hot. Do not touch them; otherwise you may be burnt. Ground the equipment. If the Power Supply is not grounded, you may get an electric shock when there is trouble, or when electricity leaks.! Connect the specified cables securely. Cables of insufficient current capacities and loose connections can cause fire and electric shock. Do not damage the power cable and connecting cables. Do not tread on, twist or tense any cable. The power cable and connecting cables may be broken, and that can cause electric shock and fire. Do not use any damaged power cable, connecting cable and plug. That can cause electric shock, short circuits and fire. If any part needs to be repaired or replaced, consult Miyachi Technos Corp. or your distributor.!!!! Stop the operation if any trouble occurs. Continuous operation after occurrence of a trouble such as burning smell, abnormal sound, abnormal heat, smoke, etc. can cause electric shock and fire. If such a trouble occurs, immediately consult Miyachi Technos Corp. or your distributor. Persons with pacemakers must stay clear of the welding machine. A person who uses a pacemaker must not approach the welding machine or walk around the welding shop while the welding machine is in operation, without being permitted by his/her doctor. The welding machine generates a magnetic field and has effects on the operation of the pacemaker while it is turned on. Protective gear must be worn. Put on protective gear such as protective gloves, long-sleeve jacket, leather apron, etc. Surface flash and expulsion can burn the skin if they touch the skin. Wear protective glasses. If you look at the flash directly during welding, your eyes may be damaged. If any Surface flash and expulsion gets in your eye, you may lose your eyesight. 1. Special Precautions 1-2

4 ! CAUTION! Apply the specified source voltage. Application of a voltage out of the specified range can cause fire and electric shock. Do not splash water on the equipment. Water splashed over the electric parts, can cause electric shock and short circuits.!! Use proper tools (wire strippers, pressure wire connectors, etc.) for termination of the connecting cables. Do not cut the conductor of wire. A flaw on it can cause fire and electric shock. Install the equipment on firm and level surface. If the equipment falls or drops, injury may result. Do not sit on, do not put things on it. Sitting on it, or putting things on it may cause malfunction.! Keep combustible matter away from the welding machine. Surface flash and expulsion can ignite combustible matter. If it is impossible to remove all combustible matter, cover them with non-combustible material. Do not cover this equipment with a blanket, cloth, etc. If such a cover is used, it may be heated and burn. Do not use this Power Supply for purposes other than welding. Use of this equipment in a manner other than specified can cause electric shock and fire.!!! Use ear protectors. Loud noises can damage hearing. Keep a fire extinguisher nearby. Keep a fire extinguisher in the welding shop in the case of fire. Maintain and inspect the equipment periodically. Maintain and inspect the equipment periodically, and repair any damage nearby before starting operation. 1. Special Precautions 1-3

5 (2) Precautions for Handling Install this Power Supply on a firm and level surface. If it is inclined, malfunction may result. For ventilation, provide 10 cm clearances to the intake and exhaust (See 9.(3)). Do not install this Power Supply in the following places: Damp places (where humidity is 90% or higher), dusty places, places where chemicals are handled, places near a high-frequency noise source, places where it is subjected to vibration and shock, hot or cold places (where temperatures are above 40 or below 5 ), and places where water will be condensed. Clean the outside of the Power Supply with a soft, dry cloth or one wet with a little water. If it is very dirty, use diluted neutral detergent or alcohol. Do not use paint thinner, benzine, etc., since they can discolor or deform the Power Supply. Do not put a screw, a coin, etc., in the Power Supply, since they can cause a malfunction. Operate the Power Supply according to the method described in this operation manual. Operate the switches and buttons carefully by hand. If they are operated roughly or with the tip of a screwdriver, a pen, etc. they may be broken. Operate the switches and buttons one at a time. If two or more of them are operated at a time, the Power Supply may have trouble or may be broken. 1. Special Precautions 1-4

6 (3) Warning Labels for Safety DANGER WHEN INSPECTING INTERNAL, MAKE SURE TO TURN OFF MAIN CIRCUIT BREAKER AND WAIT FOR AT LEAST 5 MINUTES NOT TO GET AN ELECTRIC SHOCK. Location: IS-120B interior, side surface of acrylic cover. Location: IS-120B interior, side surface of acrylic cover. Output terminal cover. DANGER HIGH VOLTAGE Location: Power supply breaker cover. 1. Special Precautions 1-5

7 2. Features The Miyachi Technos FINE SPOT-INVERTER IS-120B is an inverter-type power supply, large in capacity and specially designed to be used for spot welding and fusing. (*) In addition, it is small in size and convenient to move or shift. Monitor function is provided, which enables judging defective or non-defective welding. Has a welding current monitoring function for judgment of the weld quality. Has six control systems (Primary constant-current effective value control, secondary constant-current effective value control, secondary constant-power effective value control, primary constant-current peak value control, secondary constant-voltage effective value control and constant-phase control) for stable weld quality. Has an interrupting function([interrupt]) to interrupt fusing current by externally inputting a displacement of the electrode, etc., for stable fusing. Since an inverter is used, the power factor is high and the power condition is stabilized. Various items can be set easily by the menu selection system. Applicable to inverter transformers manufactured by various companies by changing the frequency (600Hz/800Hz/1000Hz). With four protective functions, the operator can work at his/her ease. Overcurrent detecting function No-current / no-voltage detecting function Thermostat fault detecting function Self diagnostics Small and light, but having a capacity rating of 48kVA (at 440VAC input) and maximum setting of 20kA. (*) IS-120B has three types, IS-120B-00, IS-120B-02 and IS-120B-03. Refer to 10.(2) for the differences of specifications between the models. 2. Features 2-1

8 3. Name and Functions of Each Section (1) Front Panel Front panel 1 WELD POWER 2 READY INDICATOR WELDING POWER SUPPLY FINE SPOT - INVERTER IS-120B WELD POWER 3 START READY START 4 WELD WELD TROUBLE 5 TROUBLE TROUBLE RESET PULL 6 TROUBLE RESET WELD PROGRAM MONITOR I/O COIL IN RS WELD ON/OFF [WELD POWER] lamp (Green LED) This lamp lights up when the power is supplied to IS-120B. 2 [READY] lamp (Green LED) This lamp lights up when the system is ready to start welding. To turn on this lamp: [WELD ON/OFF] key WELD ON/OFF setting of program unit MA-627A and External WELD ON/OFF signal must all be turned on. 3 [START] lamp (Green LED) This lamp stays lit while the start signal is input. 3. Name and Functions of Each Section 3-1

9 4 [WELD] lamp (Green LED) This lamp stays lit while the welding current is flowing. 5 [TROUBLE] lamp (Red LED) This lamp lights up when trouble is detected. At this time, the program unit makes a peeping sound, and the work done by IS-120B is interrupted. 6 [RESET] key If this key is pressed while the [TROUBLE] lamp is lit, that lamp is turned off. The [TROUBLE] lamp lights up again, however, as long as there is trouble. Accordingly, remove the cause of the trouble before pressing this [RESET] key. If the [TROUBLE] lamp lights up while work is being done, press the [RESET] key, then input the start signal again, and the work continues. 7 [WELD ON/OFF] key This key is one of those which are required for turning on the [READY] lamp. Each time this key is pressed, it is turned ON and OFF alternately. If it is turned on, [READY] lamp lights up, and if the key is turned off, the lamp goes off. 8 [RS-485] connector For external communication. Data Out "YES/NO" is selectable by setting DIP switch on the internal PC board (Factory default is "YES"). This PC board is mounted rear left of the IS-120B (See the figure of the bottom). When the DIP switch is turned on, weld time, current, count, etc., are output after HOLD has ended through the RS-485 serial interface. (For transmission format, see Serial Interface Specifications on p ) Duration of the Data Out is approx. 80 ms. The next Start is disabled during the Data Out (See 8.Time Chart).! DANGER When switching the DIP switch, be sure to turn off the power supply and wait for at least 5 minutes to prevent electric shock. Many DIP switches are on the PC board; select the correct one. Setting DIP switch When changing over DIP switch, take care not todamage PC board. Data out:no Data out:yes 1O1F2FF OF234567PC Board Front 3. Name and Functions of Each Section 3-2

10 9 [TOROIDAL COIL] connector For a toroidal coil connection. Used for secondary constant-current effective value control and secondary constant-power effective value control. (Toroidal coil is an option.) 10 [PROGRAM UNIT] connector Connects to Program Unit MA-627A. Used for welding schedule setting and/or reviewing monitor result. 11 Filter Cover An air filter is provided inside this cover. To be removed for maintenance of the air filter (See 9.Maintenance).! DANGER The fan motor may hurt your finger. When replacing / cleaning it, be sure to turn off the power supply. 3. Name and Functions of Each Section 3-3

11 IS-120B (2) Rear Panel Rear panel Power supply breaker cover I/O terminal cover 1 L1 L2 L3 PE I/O U V POWER OUT Output terminal cover (with terminal cover mounted) (with terminal covers removed) 1 Connecting terminal block for external input/output signal This terminal block is used to input the schedule signals and output trouble signals. 2 Welding Power Supply Breaker For three-phase power supply. 3 Welding Power Supply Breaker Lever Pulling up this Lever supplies power; pushing down, disconnect power supply. 4 Trip Button of Welding Power Supply Breaker Checks trip operation of the Breaker. Periodic checks are recommended. 5 Welding Transformer [I/O] connector For connecting [SENS] cable of welding transformer manufactured by Miyachi Technos Corp. 6 Terminal block for welding power output This terminal block is used to connect to the input of the welding transformer. 3. Name and Functions of Each Section 3-4

12 (3) MA-627A (Separately sold) WELDING SCHEDULE PROGRAM UNIT CURSOR ON MENU MA-627A TROUBLE RESET OFF ENTER [TROUBLE RESET] key If this key is pressed while the [TROUBLE] lamp of IS-120B is lit, the lamp goes off. It has the same function as the [RESET] key of IS-120B. 2 [CURSOR] keys These keys are used to move the cursor ( or ) to select an item. 3 [+ON/-OFF] keys These keys are used to change the value of a selected item or turn it on and off. When the [+ON] key is pressed, the selected value increases, and if the [-OFF] key is pressed, the value decreases. The selected item is turned on by pressing the [+ON] key, and turned off by pressing the [-OFF] key. To switch the range for [CURR RANGE] (See 4.(8)(f)), press [+ON] for [LOW]; [-OFF] for [HIGH]. 4 [ENTER] key This key is used to write the set or changed value and [ON/OFF] data in MA-627A. After any data is set or changed, be sure to press this [ENTER] key to write that data before moving the cursor. If this [ENTER] key is not pressed, MA-627A does not recognize the set data. 5 [MENU] key This key is used to display the [MENU] screen. Press this key to return to [MENU] screen from any other screens. 3. Name and Functions of Each Section 3-5

13 6 Connector This connector is used to connect the circuit cable. Connect the other end of the cable to the [PROGRAM UNIT] connector of IS-120B. CAUTION Setting and change for each item cannot be done from the start signal receiving to the weld sequence end. If the setting is done during the weld sequence, the following screen appears. Press 1 [TROUBLE RESET] key. IS-120B IS BUSY OR NOT CONNECTED Please RESET key in 3. Name and Functions of Each Section 3-6

14 4. How to Operate Screens Letters used in the following explanation Hatched letters (000) An item for which a value must be input or ON/OFF is set. Move the cursor ( ) to the number or ON (or OFF) to be set or changed, and press [+ON/-OFF] key. Outline letters ( ) An item which is indicated on the screen but cannot be changed by any operation. (1) MENU Screen MA-627A has various functions, which are set in the respective screens. [MENU] screen displays those functions in a menu form. Move the cursor ( ) to an item you desire; press [ENTER] key to go to the selected screen except MODE SWITCH screen. The numbers of (1) to (11) show the paragraph No. in the chapter. (1) (2) (3) (4) (5) [MENU] POWER SUPPLY STATE SCHEDULE MONITOR MONITOR SET COPY SETUP DATA SCHEDULE MODE MODE SWITCH STEPPER COUNT HEAT INCREASE (6) (7) (8) (*) (9) (10) INITIALIZE (11) Note: To go to (8) MODE SWITCH screen, press [MENU] key and [TROUBLE RESET] key on the program unit panel simultaneously for 4 seconds. (2) POWER SUPPLY STATE Screen This screen is used to display and set the information on IS-120B. -POWER SUPPLY STATE (a) (b) (c) (d) (e) (f) CONTROL # 0001 PROGRAMED DATE POWER SOURCE FREQUENCY WELD POWER FREQUENCY MA-627A ROM VERSION # [ ] IS-120B ROM VERSION # [ ] 4. How to Operate Screens 4-1

15 (a) CONTROL # Input the identification No. of your IS-120B. If you have two or more units of IS-120B, input 0001 for the first one, 0002 for the second one, 0003 for the third one, and so on. (b) PROGRAMED DATE Input the date when the data is set. (c) POWER SOURCE FREQUENCY The frequency of the welding power is measured and indicated automatically. (d) WELD POWER FREQUENCY Change the output frequency of the inverter power supply of IS-120B with dip switches in the body. The frequency set with the dip switches is indicated as the WELD POWER FREQUENCY. (It is set to 1000Hz when delivered.) When changing the output frequency of inverter, be sure to check that the output frequency of inverter power supply is higher than the frequency of welding transformer. If the frequency of transformer is higher, it will cause damage to the device. IS-120B rear! Make sure the DIP switches are set correctly. Printed circuit board OFFDANGER Setting to 1000Hz board. 8O FFDIP switch setting When changing over DIP switch, take care not to damage circuit Setting to 800Hz Setting to 600Hz O1F2F34567(e) MA-627A ROM VERSION # The ROM version No. of program unit MA-627A is indicated. Number goes into mark and alphabet goes into mark. (f) IS-120B ROM VERSION # The ROM version No. of IS-120B is indicated. Number goes into mark and alphabet goes into mark. 4. How to Operate Screens 4-2

16 (3) SCHEDULE Screen Up to 15 welding schedules can be set on IS-120B. Those schedules are indicated as SCHEDULE #1 to #15. This screen is used to set the schedule No., length of weld time, welding current, and so on. This data can be indicated in the 12 modes as shown below, but the indicated items are the same in all the modes. The indication mode, ms mode or CYC mode, can be changed with CYC WELD (See (8)(d)) on the MODE SWITCH screen. HEAT has two setting modes, HIGH and LOW ranges. Change the ranges to be able to obtain more precise setting. And the switchover of the ranges makes the displayed values changed. See CURR RANGE on (8)(f) for details. Each screen shows initial settings in HIGH range mode. 1 IS-120B-03- Primary constant-current effective value control ms mode Primary constant-current effective value control CYC mode (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) -SCHEDULE #01 CTRL 0 PRIMARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE ms DOWN SLOPE 000 ms HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Secondary constant-current effective value control ms mode -SCHEDULE #01 CTRL 1 SECONDARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE ms DOWN SLOPE 000 ms HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF -SCHEDULE #01 CTRL 0 PRIMARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE CYC DOWN SLOPE 00 CYC HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Secondary constant-current effective value control CYC mode -SCHEDULE #01 CTRL 1 SECONDARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE CYC DOWN SLOPE 00 CYC HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Each item of (a) to (j) indicated at the left-hand of the top screen is described from Page How to Operate Screens 4-3

17 Secondary constant-power effective value control ms mode Secondary constant-power effective value control CYC mode -SCHEDULE #01 CTRL 2 POWER RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE ms DOWN SLOPE 000 ms HEAT kw PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF -SCHEDULE #01 CTRL 2 POWER RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE CYC DOWN SLOPE 00 CYC HEAT kw PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Primary constant-current peak value control ms mode Primary constant-current peak value control CYC mode -SCHEDULE #01 CTRL 3 PRIMARY LIMIT SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE ms DOWN SLOPE 000 ms HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF -SCHEDULE #01 CTRL 3 PRIMARY LIMIT SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE CYC DOWN SLOPE 00 CYC HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Secondary constant-voltage effective value control ms mode Secondary constant-voltage effective value control CYC mode -SCHEDULE #01 CTRL 4 VOLTAGE RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE ms DOWN SLOPE 000 ms HEAT V PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF -SCHEDULE #01 CTRL 4 VOLTAGE RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE CYC DOWN SLOPE 00 CYC HEAT V PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Constant-phase control ms mode Constant-phase control CYC mode -SCHEDULE #01 CTRL 5 FIXED PULSE SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE ms DOWN SLOPE 000 ms HEAT % PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF -SCHEDULE #01 CTRL 5 FIXED PULSE SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE CYC DOWN SLOPE 00 CYC HEAT % PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF 4. How to Operate Screens 4-4

18 (a) (b) (c) (d) (e) (f) (g) (h) (i) 2 IS-120B-00-. IS-120B-02- Primary constant-current effective value control ms mode -SCHEDULE #01 CTRL 0 PRIMARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE 000 ms DOWN SLOPE 000 ms HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF (j) Secondary constant-current effective value control ms mode -SCHEDULE #01 CTRL 1 SECONDARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE 000 ms DOWN SLOPE 000 ms HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Secondary constant-power effective value control ms mode -SCHEDULE #01 CTRL 2 POWER RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE 000 ms DOWN SLOPE 000 ms HEAT kw PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Primary constant-current peak value control ms mode -SCHEDULE #01 CTRL 3 PRIMARY LIMIT SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE 000 ms DOWN SLOPE 000 ms HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Primary constant-current effective value control CYC mode -SCHEDULE #01 CTRL 0 PRIMARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE 00 CYC DOWN SLOPE 00 CYC HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Secondary constant-current effective value control CYC mode -SCHEDULE #01 CTRL 1 SECONDARY RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE 00 CYC DOWN SLOPE 00 CYC HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Secondary constant-power effective value control CYC mode -SCHEDULE #01 CTRL 2 POWER RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE 00 CYC DOWN SLOPE 00 CYC HEAT kw PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Primary constant-current peak value control CYC mode -SCHEDULE #01 CTRL 3 PRIMARY LIMIT SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE 00 CYC DOWN SLOPE 00 CYC HEAT ka PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF 4. How to Operate Screens 4-5

19 Secondary constant-voltage effective value control ms mode -SCHEDULE #01 CTRL 4 VOLTAGE RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE 000 ms DOWN SLOPE 000 ms HEAT V PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Secondary constant-voltage effective value control CYC mode -SCHEDULE #01 CTRL 4 VOLTAGE RMS SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE 00 CYC DOWN SLOPE 00 CYC HEAT V PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF Constant-phase control ms mode Constant-phase control CYC mode -SCHEDULE #01 CTRL 5 FIXED PULSE SQD SQZ WE1 COOL WE2 HOLD OFF TIME ms UP SLOPE 000 ms DOWN SLOPE 000 ms HEAT % PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF -SCHEDULE #01 CTRL 5 FIXED PULSE SQD SQZ WE1 COOL WE2 HOLD OFF TIME CYC UP SLOPE 00 CYC DOWN SLOPE 00 CYC HEAT % PULSATION 1 GAIN(1-9) 1 VALVE # 1 WELD ON/OFF OFF (a) SCHEDULE # Select one of #1 to #15 for the SCHEDULE to be set. Under ordinary circumstances, select #1 first, then select the other in order. (b) CTRL Select one from the following six welding current control methods. 0 <PRIMARY RMS> Primary constant-current effective value control 1 <SECONDARY RMS> Secondary constant-current effective value control 2 <POWER RMS> Secondary constant-power effective value control 3 <PRIMARY LIMIT> Primary constant-current peak value control 4 <VOLTAGE RMS> Secondary constant-voltage effective value control 5 <FIXED PULSE> Constant-phase control ATTENTION When using another maker's transformer and <SECONDARY RMS>, <POWER RMS> or <FIXED PULSE>, connect the toroidal coil (sold separately) to the secondary of the transformer. If it is not connected, the no connection of the toroidal coil will be judged as non-current and error message E-05 (12. Troubleshooting) is displayed.! DANGER Even though E-05 (no-current error) is displayed, current is flowing. Take care in handling. 4. How to Operate Screens 4-6

20 (c) TIME Set the time for each operation during the welding. The unit of the time is ms or CYC. For each operation, see the time chart. SQD / Squeeze delay time SQZ / Squeeze time WE1 / Weld 1 time COOL / Cooling time WE2 / Weld 2 time HOLD / Hold time OFF / Off time Length of time added to SQZ only for the first weld after start signal in repeat operation Length of time until proper squeeze is applied to workpiece Length of time to supply welding current Length of time to cool workpiece after turning off welding current Length of time to supply welding current Length of time to hold workpiece after turning off welding current Length of time to turn off valve signal during repeated operation (No repeat operation if set to "0") Time chart SQD SQZ WE1 COOL WE2 HOLD OFF Valve output UPSLOPE DOWNSLOPE (*) (*) Welding current (*) Only for IS-120B-03 (d) UPSLOPE Set the upslope time (to increase the welding current gradually) (See the figure of Time chart in the above). (e) DOWNSLOPE Set the downslope time (to decrease the welding current gradually) (See the Time chart in the above). 4. How to Operate Screens 4-7

21 (f) HEAT Set the welding current for WE1 and WE2 respectively. When CTRL is changed, the items to be set are changed. Primary constant-current effective value control Effective value of current Secondary constant-current effective value control Effective value of current Secondary constant-power effective value control Effective value of electric power Primary constant-current peak value control Peak value of current Secondary constant-voltage effective value control Effective value of voltage Constant-phase control Fixed % of pulse width (g) PULSATION Set the number of repeating time in weld time of WE2 (See the figure below). The welding current will flow by the set number of time. Time chart obtained when PULSATION is set to "3" SQD SQZ WE1 COOL WE2 HOLD VALVE output Welding current HEAT (WE1) 1st time 2nd time 3rd time HEAT (WE2) (h) VALVE # Up to two valves (welding heads) can be connected to IS-120B. Set the valve to use. (i) GAIN (1-9) Sets the amount of feedback correction in various controls. Though 1 is normally used, the larger value will give the shorter rise time. (j) WELD ON/OFF This is one of the settings required to turn on [READY] lamp of IS-120B (See 3.(1)2). 4. How to Operate Screens 4-8

22 (4) MONITOR Screen In this screen, you can confirm the working condition during welding. The monitored data in each schedule are displayed. (c) (d) (a) (e) -MONITOR SCHEDULE # 01 (b) (g) (h) TIME CURR VOLT POWER PULSE WELD1 ms ka V kw % WELD2 ms ka V kw % VALVE1 VALVE2 STEPPER COUNT WELD COUNT STEP # (f) (i) This screen shows initial settings in HIGH range mode. In LOW range mode, [CURR] and [POWER]are 0.00 ka and 0.00 kw, respectively (a) SCHEDULE # Set the No. of SCHEDULE to monitor. The measured values such as the welding current, voltage, etc. for the welding in that SCHEDULE are displayed. IS-120B stores the latest measured values of each Schedule No. For example, even if the all SCHEDULE #1 to #15 are executed at random, if #3 is input to the screen, the latest measured values in SCHEDULE #3 are displayed. Since the stored measurement values are not erased even when the power is turned off, they can be displayed for the next job. (b) TIME The lengths of times of WELD1 and WELD2 during which the current was supplied are displayed. As the unit of the time, ms and CYC are selectable. Either of them can be selected on the MODE SWITCH screen (See (8).(d)). (c) CURR The welding current is displayed. (d) VOLT The measured voltage is displayed when the voltage detection cord is connected and the secondary voltage is input. (e) POWER The measured electric power is displayed when the toroidal coil and voltage detection cord are connected and the secondary current and secondary voltage are input. (f) PULSE The widest pulse among the supplied primary pulse current is displayed by the percentage to the pulse width in the full wave mode. The pulse width in the full wave mode varies with setting of the frequency (WELD POWER FREQUENCY). 4. How to Operate Screens 4-9

23 (g) STEPPER COUNT The number of welds at the present step is displayed when the STEPPER (See (8).(e)) on the MODE SWITCH screen is turned on. (h) STEP # The present number of steps is displayed when the STEPPER on the MODE SWITCH screen is turned on. (i) WELD COUNT The present number of welds is displayed when the WELD COUNT (See (8).(b)) on the MODE SWITCH screen is turned on. (5) MONITOR SET Screen Set the conditions such as the welding current from which good or bad weldment is judged, secondary voltage, etc. If the monitored welding current, secondary voltage, etc., are out of those conditions, a trouble signal is output, and it can be used to activate an alarm buzzer, alarm lamp, and so on. (b) (c) (a) (d) (e) -MONITOR SET SCHEDULE #01 CURRENT VOLT POWER PULSE WELD1 HIGH 99.9kA 9.99V 99.9kW 100% WELD1 LOW 00.0kA 0.00V 00.0kW WELD2 HIGH 99.9kA 9.99V 99.9kW 100% WELD2 LOW 00.0kA 0.00V 00.0kW (a) SCHEDULE # Input the No. of the SCHEDULE to monitor (to set the schedules). (b) CURRENT HIGH/LOW Set the upper limit (HIGH) and lower limit (LOW) of the welding current for each of WELD1 and WELD2. (c) VOLT HIGH/LOW Set the upper limit (HIGH) and lower limit (LOW) of the secondary voltage for each of WELD1 and WELD2. (d) POWER HIGH/LOW Set the upper limit (HIGH) and lower limit (LOW) of the electric power for each of WELD1 and WELD2. (e) PULSE HIGH If the percentage of the welding current pulse to the pulse width in the full wave mode exceeds the percentage set in the PULSE HIGH, ERROR signal is output. 4. How to Operate Screens 4-10

24 (6) COPY SETUP DATA Screen MA-627A has two memories to store the data (See the figure below). When MA-627A is connected to IS-120B, the data stored in the memory of IS-120B are displayed on the Monitor Panel. When the data are changed and the [ENTER] key is pressed, the contents of the memory of IS-120B are rewritten to the new setting. MA- 627A stores 2 kinds of data in its Memory 1 and Memory 2, respectively. IS-120B stores one data, independently from MA- 627A. Memory 1 Memory 2 IS- 120B Memory INDICATOR WELDING POWER SUPPLY FINE SPOTO INVERTER IS-120B WELD POWER Data are not stored only by changing data on screen. Be sure to press [ENTER]. MA-627A Screen READY START WELD TROUBLE TROUBLE RESET PULL WELD PROGRAM MONITOR I/O COIL IN RS-485 When two or more units of IS-120B are used and the contents of the memory of the first unit need to be copied to the second unit, copy the data of the first unit to the memory of MA-627A temporarily, then copy those data to the second unit. 4. How to Operate Screens 4-11

25 -COPY SETUP DATA (a) (b) (c) (d) (e) IS-120B -----> MA-627A (MEMORY 1) IS-120B -----> MA-627A (MEMORY 2) IS-120B <----- MA-627A (MEMORY 1) IS-120B <----- MA-627A (MEMORY 2) SCHEDULE [01] -----> SCHEDULE [01]-[01] This screen shows initial settings. Move the cursor ( ) to a necessary item among (a) to (d), then press [ENTER] key; the data will be copied. (a) IS-120B --> MA-627A (MEMORY 1) The data in IS-120B are copied to MEMORY 1 of MA-627A. (b) IS-120B --> MA-627A (MEMORY 2) The data in IS-120B are copied to MEMORY 2 of MA-627A. (c) IS-120B <-- MA-627A (MEMORY 1) The data in MEMORY 1 of MA-627A are copied to IS-120B. (d) IS-120B <-- MA-627A (MEMORY 2) The data in MEMORY 2 of MA-627A are copied to IS-120B. (e) SCHEDULE[ 01 ] --> SCHEDULE[ 01 ]-[ 01 ] This function is used to copy the SCHEDULE (welding condition). IS-120B can set up to 15 schedules. They are indicated as SCHEDULE #1 - #15. This function is also used to "change the setting of SCHEDULE #1 and perform welding according to another schedule". For an example, SCHEDULE #2 can be set by modifying SCHEDULE #1 as follows: SCHEDULE [ 01 ] --> SCHEDULE [ 02 ]-[ 02 ] (Be sure to press the [ENTER] key before moving the cursor) Move the cursor to the left of the letters of SCHEDULE and press the [ENTER] key. The data of SCHEDULE #1 are copied to SCHEDULE #2 by this operation. Call #2 on the SCHEDULE screen, and change the values, if necessary. For another example, SCHEDULE #1 can be copied to SCHEDULE #2 through SCHEDULE #4 at once by setting: SCHEDULE [ 01 ] --> SCHEDULE [ 02 ]-[ 04 ] 4. How to Operate Screens 4-12

26 (7) SCHEDULE MODE Screen (a) (b) (c) (d) (e) (f) -SCHEDULE MODE MONITOR FIRST TIME 15ms DELAY-START SET 20ms NON-CURRENT PULSE COUNT 9 CURRENT MONITOR NUMBER 1 WELD COUNT 00 VALVE 1 VALVE 2 P/S RATIO This screen shows initial settings. (a) MONITOR FIRST TIME MONITOR FIRST TIME sets the time to begin the measurement of monitored value (current, voltage, wattage, and pulse width). Setting range is 1-15ms. This function is used to exclude the initial slope from the measurement. When the welding time is shorter than MONITOR FIRST TIME, although a monitor value is indicated, the judgment of a monitor value is not performed.! CAUTION In IS-120B-00 and IS-120B-02, the current during UP SLOPE and DOWN SLOPE is also monitored in the control methods excluding the Primary constant-current peak value control. So, if the set period in UP SLOPE and DOWN SLOPE is longer than MONITOR FIRST TIME, the monitored current may be displayed less than the set value. In the Primary constant-current peak value control of IS-120B-00 and IS-120B-02 and all control methods of IS-120B-03, no current during UP SLOPE and DOWN SLOPE is monitored. In the occasion, if the period of WELD1 and WELD2 is equally set to the period of UP SLOPE and DOWN SLOPE, the monitored value is displayed as 0. ~ t Monitor measurement t: MONITOR FIRST TIME Weld Time WELD1, WELD2 4. How to Operate Screens 4-13

27 (b) DELAY-START SET DELAY-START SET sets the length of time after the schedule signals are input until SQD (Squeeze delay time) starts. The setting range is 5 20 ms. Schedule Signal IS-120B selects one from SCHEDULES #1 through #15 according to the combination of the four schedule signals which are externally input. For binary format, see the following table. SCHEDULE Schedule signal 1 Schedule signal 2 Schedule signal 4 Schedule signal Closed Blank Open The SCHEDULE No. is determined according to the state of the schedule signals after the time to which DELAY-START SET is set (See the figure below). Schedule signal 1 Schedule signal 2 Schedule signal 4 Schedule signal 8 5~20ms Open Open Closed Closed Determined at this point. SCHEDULE #12 is selected in this example. DELAY- START SET time 4. How to Operate Screens 4-14

28 (c) NON-CURRENT PULSE COUNT If the flowing current (or voltage) drops to a certain level, IS-120B judges that no current (or no voltage applied) flows. Then, [TROUBLE] lamp turns on (when the [TROUBLE] lamp comes on, operation stops automatically.). In the early period of supply of the power, the current does not flow freely due to the high secondary resistance of the welding transformer and the IS-120B may judge that no current flows (or no voltage is applied). To prevent such troubles, NON-CURRENT PULSE COUNT is used to set the number of current pulses less than or equal to the specific level (0.8kA in HIGH Range, 0.08kA in LOW Range) at which IS-120B judges that no current flows (no voltage is applied). The setting range of this item is 1 through 9. The set number of weak current pulses is the number obtained by multiplying the number of this item by 10. Example: When the system is used at 1000Hz and the above item is set to 2, the set number of weak current pulses is 2 x 10 = 20. Since the length of 1 pulse at 1000Hz is 0.5ms, if the current is not detected for 20 x 0.5ms = 10ms, IS-120B judges it as non-current. (d) CURRENT MONITOR NUMBER Set the monitor value of the current which is displayed when Miyachi Technos Monitor Unit MA-628A is connected. 1 Monitor value of WELD1 is displayed. 2 Monitor value of WELD2 is displayed. (e) WELD COUNT If the number of welds performed while the external WELD COUNT signal is input is less than the WELD COUNT setting, the COUNT ERROR signal is output (See the figure below). For example, if the number of weld is set to 5 on a PLC, for example, set WELD COUNT to 5. This function can be turned on and off with WELD COUNT (See (8)(b)) on the (8) MODE SWITCH screen. When trouble occurs Normal operation Number of weld Weld count Count trouble Trouble reset 4. How to Operate Screens 4-15

29 (f) P/S RATIO Set the turn ratio of the welding transformer (The ratio of the primary voltage to the secondary voltage). Its setting range is ATTENTION When using <PRIMARY RMS> or <PRIMARY LIMIT>, be sure to set the turn ratio of the welding transformer properly. If incorrect value is set, normal control can not be expected. (8) MODE SWITCH Screen To go to the MODE SWITCH Screen, press [MENU] key and [TROUBLE RESET] key on the program unit panel simultaneously for 4 seconds. -MODE SWITCH (a) (b) (c) (d) (e) (f) START SIG.MODE OFF RE-WELD OFF WELD COUNT OFF END SIG.MODE OFF RESET MODE OFF 4-START OFF CYC WELD OFF PARITY CHECK OFF STEPPER OFF INTERRUPT OFF CURR. RANGE HIGH This screen shows initial settings. (g) (h) (i) (j) (k) (a) START SIG. MODE Set the input method for the schedule signals to operate IS-120B. ON (Operation by pulse input) OFF (Operation continued while signal is input) If schedule signal which is longer than DELAY-START SET setting is input, operation is continued from SQD to HOLD. If an emergency stop signal is input externally, operation stops. If schedule signal input is interrupted during SQZ time, operation is interrupted. Operation cannot be interrupted after SQZ time ends and operation of WE1 starts. Operation is continued until HOLD. (b) WELD COUNT Set ON/OFF of WELD COUNT function (See (7)(e)). When it is turned on, you can see whether or not the welding of the set number is performed each time. ON OFF WELD COUNT function is turned on. WELD COUNT function is turned off. 4. How to Operate Screens 4-16

30 (c) RESET MODE Set the reset method to be applied when any ERROR signal is output (when the current or voltage is out of the conditions set on (5)MONITOR SET Screen). If the ERROR signal is not reset, the next workpiece cannot be welded. ON OFF Input ERROR RESET signal to reset trouble. Input SCHEDULE signal or ERROR RESET signal to reset trouble. (d) CYC WELD Change the unit of TIME, UP SLOPE and DOWN SLOPE set on (3)SCHEDULE Screen. ON OFF CYC ms 1 CYC = 20ms at 50Hz 1 CYC = 16.6ms at 60Hz (e) STEPPER Turn on and off the step-up(down) operation (See (9)STEPPER COUNT Screen). ON OFF Step-up(down) operation is turned on. Step-up(down) operation is turned off. (f) CURR. RANGE Switches the range of HEAT that is set on SCHEDULE Screen. Range Current setting Power setting HIGH (Initial setting) Maximum setting 20.0 ka Minimum setting 00.1 ka Maximum setting 20.0 kw Minimum setting 00.1 kw LOW Maximum setting 9.99 ka Minimum setting 0.10 ka Maximum setting 9.99 kw Minimum setting 0.10 kw ATTENTION In accordance with the Current Ranges, the value of detecting No Current Error differs respectively. That is: 0.8kA or less in HIGH Range, 0.08kA or less in LOW Range Therefore, if the current is set to 0.8kA or less in the operation of HIGH Range, No Current Error is detected. Beforehand, change to LOW Range to perform the operation. HIGH and LOW ranges do not affect Secondary constant-voltage effective value control and Constant-phase control. 4. How to Operate Screens 4-17

31 (g) RE-WELD When any current monitor trouble is detected, the welding current can be supplied again to the same point, if this item is set so. The welding current supplied at the second time is 5% larger than the set value. ON Current is re-supplied. OFF Current is not re-supplied. SQD SQZ WE1 COOL WE2 Time chart of RE-WELD HOLD Interval for re-welding (Fixed to 200ms) 200ms Valve output Welding current HEAT (WE1) HEAT (WE2) HEAT 5% larger than(we1) HEAT 5% larger than(we2) (h) END SIG. MODE Set the end signal to be output when any monitor trouble signal is output. ON OFF End signal is not output when IS-120B finishes operation. End signal is output when IS-120B finishes operation. (i) 4-START ON OFF Four single schedules are available. Only one of schedule signals 1, 2, 4 and 8 is acceptable. If two or more schedule signals are input, one of lowest number is accepted. Binary-numbered 15 schedules are available. Up to 15 schedules can be used by combining schedule signals 1, 2, 4 and 8. For combination, see 7.(b). 4. How to Operate Screens 4-18

32 coating)electrodelecdisplacementetrodis-120b (j) PARITY CHECK When this item is turned on, the parity check is performed to see if the schedule signals are input correctly. SCHEDULE Schedule signal 1 Schedule signal 2 Schedule signal 3 Schedule signal 4 Parity signal ( Closed, Blank Open) As shown in the above table, a parity signal is added to the four schedule signals so that the number of input signals is always becomes odd. If the number of input signals is even, the error signal is output. When this item is turned off, the parity check is not performed. (k) INTERRUPT When the interrupt function is used, the current is turned off to avoid excessive displacement, for example, when displacement reaches a certain level in the fusing (See the figure below). ON OFF Interrupt function is used. Interrupt function is not used eworkpiece (With insulation When displacement reaches set value, interrupt function works to turn off fusing current. This device is connected to Miyachi Technos Weld Checker (MM-720A/MM-730A, etc.) and displacement is set. When fusing current starts flowing, insulation coating is melting... Electrode mores by distance equal to melted depth (displacement). 4. How to Operate Screens 4-19

33 START input WE1 STOP input INTERRUPT input SQD T1 SQZ WE1 COOL WE2 HOLD When [WE1 STOP] signal is input, WE1 stops and COOL or WE2 will follow. When [INTERRUPT] signal is input, welding current is turned off and HOLD will follow (only for IS-120B-02). T1: Time that is set to [DELAY-START SET] When the INTERRUPT function is turned on, the functions of the external input signal are changed. See the following table and Connection Diagram for External Input/Output Signals (6. Interface). Terminal No When INTERRUPT is turned off When INTERRUPT is turned on Used for inputting of both schedule signal and start signal. Used for parity check signal (See (8)(j)). Used for weld count signal for WELD COUNT function (See (7)(e)). Used for inputting of only schedule signal. Used for start signal. Used for INTERRUPT signal. 4. How to Operate Screens 4-20

34 (9) STEPPER COUNT Screen IS-120B can change the level of the welding current depending on the welding condition. The function to increase the welding current is called the step-up function, and that to decrease the welding current is called the step-down function. Set the timing for step-up (step-down) by the number of welds. (a) (b) -STEPPER COUNT (FOR ALL SCHEDULES) STEP # VALVE1=3 VALVE2=4 VALVE1 VALVE2 VALVE1 VALVE2 STEP STEP STEP STEP STEP STEP STEP STEP STEP This screen shows initial settings. Current Set value of STEP 5 Set value of STEP 4 Set value of STEP 3 Set value of STEP 2 Set value of STEP 1 (Fixed to 100%) ~ STEP1 STEP2 STEP3 STEP4 STEP5 Number of welds As shown in the above figure, the current is stepped up(down) to the value for STEP2 when the number of welds for STEP1 finishes. Similarly, the current is stepped up(down) to the value for STEP3 when the number of welds for STEP2 finishes. (a) STEP # VALVE1/VALVE2 Counting of weld is started at the step set here. If VALVE1 is set to 3 as shown above, counting of weld is started at the first weld of STEP3, even at the first operation. The welding current is increased (or decreased) by the value set to STEP3 on the HEAT INCREASE % screen. Set the desired STEP No. 1-9 for VALVE1, 2 respectively. (b) STEP 1-9 Set the number of welds for each step. After performing weld by the set number at each step, the system proceeds to the next step. 4. How to Operate Screens 4-21

35 (10) HEAT INCREASE % Screen Set the increase (or decrease) rate of the welding current for the step-up (or step-down) function. The welding current at STEP1 is to be 100%. Set the increase (or decrease) rate for each step depending on change of the welding condition. -HEAT INCREASE % SCHEDULE # 01 STEP1 % FIXED STEP6 100% STEP2 100% STEP7 100% STEP3 100% STEP8 100% STEP4 100% STEP9 100% STEP5 100% This screen shows initial settings. (11) INITIALIZE Screen This screen is used to initialize the ordinary work area of MA-627A (Memory in IS-120B) to the initial settings. Even when initialized, memory of MA-627A is not erased. Move the cursor ( ) to YES or NO, and press [ENTER] key. WELDING CONDITIONS INITIAL FORMAT (a) (b) YES NO (a) YES (b) NO Memory is initialized (returned to the initial settings). Screens after initializing show the same settings which appear on the screens in the chapter of 4. How to Operate Screens. Memory is not initialized, and [MENU] screen appears. 4. How to Operate Screens 4-22

36 ogrou1 2 3 nd (G8 9 IS-120B 5. Connection Procedures (1) Basic Configuration MA-627A IS- 120B Front WELDING POWER SUPPLY INDICATOR FINE SPOT - INVERTER IS-120B MENU WELD POWER READY Welding head START WELD MA-627A TROUBLE TROUBLE RESET Circuit cable WELD PROGRAM MONITOR I/O PULL COIL IN RS-485 Noise filter * Secondary cable Toroidal coil leakage breaker )Earth Input cable Match the designations of cable and termanals L1 IS- 120B Rear L2 U V POWER OUT L3 I/O PE transformertwelding [SENS] cable (Refer CAUTION) Primary Output cable Secondary NOTE: All items are separately sold except IS-120B (See 10.(3)Separately Sold Items). (*) Noise filter: Prepare a noise filter of the following A or B for the CE Marking compliance. A B Manufacturer TIMONTA Okaya Electric Ind. Co., LTd. Model FMAC-0954-H110 3SUP-HK150-ER-6 Specification 440VAC, 50/60 Hz, 3 x 110A 500VAC, 50/60 Hz, 3 x 150A 5. Connection Procedures 5-1

37 MADE IN JAPAN SERIAL NO IS-120B! CAUTION Be sure to use SK [SENS] cable, to connect IS-120B with Weld trans ITH-651A6W, ITG-1050A6W, or ITF-1800A6W (See 10.(3)Separately Sold Items). (2) Connecting! WARNING Be sure to ground the equipment. Be sure to install the terminal cover after wiring. Be sure to install an earth leakage breaker of 60A rated current or more to prevent electric shocks. 1) Connecting the transformer. Connect the output cable from the primary of the welding transformer to the Terminal block for welding transformer on the rear panel. When using IT-510B/IT-511B with IS-120B, connect the output cable to No. 1, 3 and 5 of the terminal block on the transformer rear. (See figure at right.) SENS MIYACHI TECHNOS CORP. When using ITH-651A6W, ITG-1050A6W, or ITF-1800A6W, connect [SENS] cable from the transformer to the Welding Transformer [I/O] connector. NB: Ensure two notes written below before connecting [SENS] cable i) Do NOT connect toroidal coil to Toroidal coil connector on the front panel. ii) Be sure to keep thermostat input terminal (No.26) of External Input /Output Signal open (See 6.Interface). When using another manufacturer's welding transformer, follow 5) and 6). 5. Connection Procedures 5-2

38 2) Connecting the power cable. Connect the power supply to the Welding Power Supply Breaker on the rear panel and ground the [PE] terminal (See 10.(3)Separately Sold Items). 3) Connect the necessary cables to Connecting terminal block for external input/output signal (See 6.Interface). 4) Connecting the program unit. Connect the control cable to the [PROGRAM UNIT] connector on the front panel. Observe the following procedures only when other manufacturer's transformer is used. 5) Connecting a toroidal coil for secondary current detection. Connect a toroidal coil to [TOROIDAL COIL] connector on the front panel. (Do not connect a toroidal coil when Miyachi's transformer is used.) 6) When there is thermo sensor in weld trans. Connect to thermo input terminal (Terminal No.26) of External Input /Output Signals (See 6. Interface). 5. Connection Procedures 5-3