Miyachi IS-120B-00 Series User manual

00-□□
02-□□
03-□□
INVERTER-TYPE WELDING POWER SUPPLY
IS-120B-
OPERATION MANUAL
CONTENTS
1. Special Precautions ･･････････････ 1-1 to 5
2. Features ････････････････････････ 2-1
3. Name and Functions of
Each Section ････････････････････ 3-1 to 6
4. How to Operate Screens ･････････ 4-1 to 22
5. Connection Procedures ･･････････ 5-1 to 3
6. Interface ････････････････････････ 6-1 to 5
7. Basic Operation ･････････････････ 7-1
8. Time Chart ･･････････････････････ 8-1
9. Maintenance ････････････････････ 9-1 to 4
10. Specifications ･････････････････10-1 to 12
11. Outline Drawing ･･･････････････11-1
12. 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
PROGRAM
RESET
TROUBLE
MONITOR
WELD
TROUBLE
WELD
I/O RS-485
INDICATOR
START
READY
POWER
WELD
WELDING POWER SUPPLY
FINE SPOT -
INVERTER
IS-120B
COIL IN
PULL
WELDING POWER SUPPLY

IS-120B
1. Special Precautions
1-1
Denotes operations and practices that
may result in personal injury or damage
to the equipment if not correctly followed.
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.
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.
Denotes operations and practices
that may imminently result in serious
injury or loss of life if not correctly
followed.
DANGER
!
Denotes operations and practices
that may result in serious injury o
r
loss of life if not correctly followed.
WARNING
!
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.
Each symbol with a triangle
denotes that the content
gives DANGER, WARNING
or CAUTION to the operator.
!
DANGER
!
C
A
UTION
！

IS-120B
1. Special Precautions
1-2
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.
WARNING
!
!
!
!
!
!

IS-120B
1. Special Precautions
1-3
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.
CAUTION
!
!
!
!
!
!
!
!

IS-120B
1. Special Precautions
1-4
(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.
Do not put a screw, a coin, etc., in the Power Supply, since they can cause a
malfunction.
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 no
t
use paint thinner, benzine, etc., since they can discolor or deform the Powe
r
Supply.
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.

IS-120B
1. Special Precautions
1-5
(3) Warning Labels for Safety
Location: IS-120B interior, side surface of acrylic cover.
Location: IS-120B interior, side surface of acrylic cover.
Output terminal cover.
Location: Power supply breaker cover.
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.
HIGH
VOLTAGE
DANGER

IS-120B
2. Features
2-1
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.

IS-120B
3. Name and Functions of Each Section
3-1
3. Name and Functions of Each Section
(1) Front Panel
① [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.
PROGRAM
RESET
TROUBLE
MONITOR
WELD
TROUBLE
WELD
I/O RS-485
INDICATOR
START
READY
POWER
WELD
WELDING POWER SUPPLY
IS-120B
COIL IN
TROUBLE
RESET
WELD
POWER
READY
START
WELD
TROUBLE
WELD
ON/OFF
①
②
③
④
⑤
⑦
⑩⑧
⑥
⑪
Front panel
⑨
FINE SPOT - INVERTER
PULL

IS-120B
3. Name and Functions of Each Section
3-2
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. 10-4.)
Duration of the Data Out is approx. 80
ms.
The next Start is disabled during the Data Out (See 8.Time Chart).
When switching the DIP switch, be sure to turn off the power supply
and wait for at least 5 minutes to prevent electric shock.
DANGER
!
PC Board
ＯＦＦ
Data out:YES
Front
Many DIP switches are on the PC board;
select the correct one.
When changing over DIP
switch, take care not
todamage PC board.
１２３４５６７８
ＯＦＦ
Data out:NO
１２３４５６７８
Setting DIP switch

IS-120B
3. Name and Functions of Each Section
3-3
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.
⑪Filter Cover
An air filter is provided inside this cover. To be removed for maintenance of the
air filter (See 9.Maintenance).
The fan motor may hurt your finger.
When replacing / cleaning it, be sure to turn off the power supply.
DANGER
!

IS-120B
3. Name and Functions of Each Section
3-4
(2) Rear Panel
①Connecting 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.
Power supply breaker
cover
PEL3L2L1
UV
POWER OUT
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
14
13
12
11
10
9
8
7
6
5
4
3
2
1
I/O terminal cover
Output terminal cover
(with terminal cover mounted) (with terminal covers removed)
①
Rear panel
I/O
②
③
④
⑤
⑥

IS-120B
3. Name and Functions of Each Section
3-5
(3) MA-627A (Separately sold)
① [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.
WELDING SCHEDULE PROGRAM UNIT
ON
OFF
CURSOR
①②③
④⑤
⑥
MA - 627 A
TROUBLE
RESET ENTER
MENU

IS-120B
3. Name and Functions of Each Section
3-6
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

IS-120B
4. How to Operate Screens
4-1
4. How to Operate Screens
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 COPY SETUP DATA
SCHEDULE SCHEDULE MODE
MONITOR MODE SWITCH
MONITOR SET STEPPER COUNT
HEAT INCREASE
INITIALIZE
(6)
(7)
(8) (*)
(9)
(10)
(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.
Letters used in the following explanation
-POWER SUPPLY STATE
CONTROL #0001
PROGRAMED DATE 2000. 12. 03
POWER SOURCE FREQUENCY
WELD POWER FREQUENCY
MA-627A ROM VERSION #[]
IS-120B ROM VERSION #[]
(a)
(b)
(c)
(d)
(e)
(f)

IS-120B
4. How to Operate Screens
4-2
(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.)
(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 .
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.
DIP switch setting
Printed circuit board
ＯＦＦ
１２３４５６７８
Setting to 1000Hz
ＯＦＦ ＯＦＦ
Setting to 800Hz Setting to 600Hz
IS- 120B
rear
Make sure the DIP switches
are set correctly. When changing
over DIP switch,
take care not to
damage circuit
board.
１２３４５６７８ １２３４５６７８
DANGER
!

IS-120B
4. How to Operate Screens
4-3
(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.
①IS-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)
-SCHEDULE #01 CTRL 0 〈 PRIMARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01CTRL 0 〈 PRIMARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
(j)
Secondary constant-current
effective value control ms mode
Secondary constant-current
effective value control CYC mode
-SCHEDULE #01 CTRL 1 〈 SECONDARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 1 〈 SECONDARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
Each item of (a) to (j) indicated at the left-hand of the top screen is described
from Page 4-6.
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.

IS-120B
4. How to Operate Screens
4-4
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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kW
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 2 〈 POWER RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kW
PULSATION 1GAIN(1-9) 1
VALVE #1WELD 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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 3 〈 PRIMARY LIMIT 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD 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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 000 ms
DOWN SLOPE 000 ms
HEAT 10.0 10.0 V
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 4 〈 VOLTAGE RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 00 CYC
DOWN SLOPE 00 CYC
HEAT 10.0 10.0 V
PULSATION 1GAIN(1-9) 1
VALVE #1WELD 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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 000 ms
DOWN SLOPE 000 ms
HEAT 10.0 10.0 %
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 5 〈 FIXED PULSE 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 00 CYC
DOWN SLOPE 00 CYC
HEAT 10.0 10.0 %
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF

IS-120B
4. How to Operate Screens
4-5
②IS-120B-00-□□. IS-120B-02-□□
Primary constant-current
effective value control ms mode
Primary constant-current
effective value control CYC mode
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
-SCHEDULE #01 CTRL 0 〈 PRIMARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01CTRL 0 〈 PRIMARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
(i) (j)
Secondary constant-current
effective value control ms mode
Secondary constant-current
effective value control CYC mode
-SCHEDULE #01 CTRL 1 〈 SECONDARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 1 〈 SECONDARY RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kW
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 2 〈 POWER RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kW
PULSATION 1GAIN(1-9) 1
VALVE #1WELD 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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 ms
DOWN SLOPE 000 ms
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 3 〈 PRIMARY LIMIT 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 CYC
DOWN SLOPE 00 CYC
HEAT 00.1 00.1 kA
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF

IS-120B
4. How to Operate Screens
4-6
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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 ms
DOWN SLOPE 000 ms
HEAT 10.0 10.0 V
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 4 〈 VOLTAGE RMS 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 CYC
DOWN SLOPE 00 CYC
HEAT 10.0 10.0 V
PULSATION 1GAIN(1-9) 1
VALVE #1WELD 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 0000 0000 000 000 000 000 0000 ms
UP SLOPE 000 ms
DOWN SLOPE 000 ms
HEAT 10.0 10.0 %
PULSATION 1GAIN(1-9) 1
VALVE #1WELD ON/OFF OFF
-SCHEDULE #01 CTRL 5 〈 FIXED PULSE 〉
SQD SQZ WE1 COOL WE2 HOLD OFF
TIME 000 000 00 00 00 00 00 CYC
UP SLOPE 00 CYC
DOWN SLOPE 00 CYC
HEAT 10.0 10.0 %
PULSATION 1GAIN(1-9) 1
VALVE #1WELD 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.
Even though E-05 (no-current error)is displayed, current is flowing.
Take care in handling.
D
A
NGER
！

IS-120B
4. How to Operate Screens
4-7
(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 Length of time added to SQZ only for the
first weld after start signal in repeat operation
SQZ / Squeeze time Length of time until proper squeeze is
applied to workpiece
WE1 / Weld 1 time Length of time to supply welding current
COOL / Cooling time Length of time to cool workpiece after turning
off welding current
WE2 / Weld 2 time Length of time to supply welding current
HOLD / Hold time Length of time to hold workpiece after turning
off welding current
OFF / Off time
Length of time to turn off valve signal during
repeated operation
(No repeat operation if set to "0")
(＊) 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).
SQD
SQZ
WE1
COOL
WE2
HOLD
OFF
UP SLOPE
DOWN SLOPE
Valve output
Welding current
Time chart
(＊) (＊)