Amada MIH-200A User manual

AA09OM1158384-07
OPERATION MANUAL
AC INVERTER SEAM WELDING
POWER SUPPLY
MIH-200A

MIH-200A
Contents
1
Thank you for purchasing our AC Inverter Seam Welding Power Supply MIH-200A.
This operation manual describes its method of operation and precautions for use.
Read this operation manual carefully prior to use. Store appropriately for ready reference.
Contents
1. Special Notes
(1) Safety Precautions·································································1-1
(2) Precautions for Handling ·························································1-4
(3) On Disposal ·········································································1-4
(4) Warning Label for Safety ·························································1-5
(5) Operation of the OK Signal ······················································1-5
2. Features ··················································································2-1
3. Name and Functions of Each Section
(1) Front Panel ··········································································3-1
(2) Rear Panel···········································································3-3
(3) MA-627A (Sold Separately) ·····················································3-4
4. How to Operate Screens
(1) MENU Screen·······································································4-1
(2) POWER SUPPLY STATE Screen··············································4-1
(3) SCHEDULE Screen ·······························································4-3
(4) MONITOR1/MONITOR2 Screen ···············································4-6
(5) MONITOR SET Screen···························································4-8
(6) COPY SETUP DATA Screen ····················································4-9
(7) MODE SELECT Screen ··························································4-11
(8) MONITOR MODE Screen ·······················································4-15
(9) I/O CHECK Screen ································································4-16
(10) RESET TO DEFAULT Screen·················································4-17
(11) PROGRAM PROTECT MODE Screen ·····································4-17
(12) OVER WRITE / DOWN LOAD Screen······································4-19
5. Connection Procedures
(1) Basic Configurations ······························································5-1
(2) Connecting···········································································5-2
6. Interface
(1) Connection Diagram for External Input/Output Signals ··················6-1
(2) Description of External I/O Signals ············································6-3
(3) Connection of Input Signals ·····················································6-6
7. Basic Operation········································································7-1
8. Timing Chart ············································································8-1
9. Specifications
(1) Specifications ·······································································9-1
(2) Options (Sold Separately) ·······················································9-3
(3) Duty Cycle Graph ··································································9-4
(4) Schedule Data Table ······························································9-5
10. Outline Drawing ······································································10-1
11. Troubleshooting
(1) Fault Code List······································································11-1
(2) When a Welding Does not Start Even if the 2ND Signal is Input ······11-3

MIH-200A
1. Special Notes
1-1
1. Special Notes
(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 except as instructed.
The interior of this Power Supply carries high voltage. It is very dangerous to
touch any parts except as instructed. Do not touch.
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, attempt to repair, or modify the Power Supply.
These actions can cause electric shock and fire. Perform only the
maintenance described in the operation manual.
Never burn, destroy, cut, crush or chemically decompose the Power
Supply.
This product incorporates parts containing gallium arsenide (GaAs).
DANGER
!
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 or
loss of life if not correctly followed.
WARNING
!
Denotes operations and practices that
may result in personal injury or
damage to the equipment if not
correctl
y
followed.
CAUTION
！
!
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.

MIH-200A
1. Special Notes
1-2
Do not insert your fingers or hands between the electrodes.
When welding, keep your fingers and hands away from the electrodes.
Do not touch any welded part or electrode during welding or just after
completion of welding.
The welded parts of a workpiece, electrodes, and the arm are very hot.
Do not touch them; burns may result.
Ground the equipment.
If the Power Supply is not grounded, you may receive an electric shock in
the event of malfunction or current leak.
!
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 apply force to any cable. Doing so may cause the
power cable and connecting cables to become broken, leading to electric
shock and fire.
Do not use any damaged power cable, connecting cable, or plug.
Failure to observe this precaution can lead to electric shock, short circuit, or
fire. If any part must be replaced or requires repair, consult us 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 us 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 site 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 get in your eye, you may lose your
eyesight.
WARNING
!

MIH-200A
1. Special Notes
1-3
!
Apply the specified supply voltage.
Application of a voltage outside the specified range may result in fire or
electric shock.
Do not allow water to come in contact with the equipment.
Water on the electric parts can cause electric shock and short circuit.
!
Use proper tools (wire strippers, pressure wire connectors, etc.) for
terminal treatment of the connecting cables.
Do not cut the wire conductor; fire or electric shock may result.
!
Install the equipment on a firm and level surface.
Injury may result if the equipment falls or is dropped.
Do not sit on or place objects on the Power Supply.
Failure to observe this precaution may lead to malfunction.
!
Keep combustible matter away from the Power Supply.
Surface flash and expulsion may ignite combustible matter. If it is
impossible to remove all combustible matter, cover it with non-combustible
material.
Do not cover the Power Supply with a blanket, cloth, etc.
Do not cover the Power Supply with a blanket, cloth, etc. while it is in use.
The cover may be overheated and burned.
Do not use this Power Supply for purposes other than welding.
Use of this Power Supply 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 case of fire.
!
Maintain and inspect the Power Supply periodically.
Maintain and inspect the Power Supply periodically, and repair any damage
nearby before starting operation.
CAUTION
!

MIH-200A
1. Special Notes
1-4
(2) Precautions for Handling
Any work on this Power Supply must be performed only by the personnel with
sufficient knowledge and experience regarding an inverter-type welding power
supply.
Install this Power Supply on a firm and level surface. Operation on an incline
may result in malfunction.
For ventilation, provide 10-cm clearances at the intake and exhaust.
Transporting this Power Supply requires a minimum of two people. Be sure to
hold the underside when transporting. Holding a projection such as the
terminal cover may cause damage.
Do not install the Power Supply in the following locations:
Damp areas (where the humidity is higher than 90%),
areas where temperatures are above 40°C or below 5°C
areas near a high noise source,
areas where chemicals are handled,
areas where water may condense,
dusty areas, and
areas exposed to large amounts of vibration or shock.
Clean the exterior of the Power Supply using a soft, dry cloth or one slightly
dampened with water. If the Power Supply is very dirty, use diluted neutral
detergent or alcohol. Do not use paint thinner, benzine, etc., as they may
discolor or deform the Power Supply.
Do not insert a screw, coin, etc. into the Power Supply, as they may cause
malfunction.
Operate the Power Supply in accordance with the method described in this
operation manual.
Press switches/buttons carefully by hand. Handling them roughly (using a
screwdriver or the tip of pen) may result in a malfunction or failure.
Press switches/buttons one at a time. Pressing more than one switch/button at
a time may result in a malfunction or failure.
(3) On Disposal
This product incorporates parts containing gallium arsenide (GaAs). At the time of
disposal, separate it from general industrial waste or domestic waste and carry
out the disposal in accordance with applicable laws and regulations.

MIH-200A
1. Special Notes
1-5
(4) Warning Label for Safety
On the main body is warning label for safety. Its location and meaning are as
noted below.
Location: Output terminal cover.
Meaning: Shock hazard.
(5) Operation of the OK Signal
For products shipped in or after December 2014, the OK signal is not output at
WELD OFF. Other signals remain the same.
To check the product oepration at WELD OFF, use the END signal.
The OK/CAUTION signal is output at WELD ON as before.
For the output operation of the OK signal, see 4.(7)(f) OUT MODE (OK) and
Terminal 29 in 6.(2) Description of External I/O Signals.

MIH-200A
2. Features
2-1
2. Features
The MIH-200A is an inverter-controlled power supply for AC welding. In
combination with an AC transformer and a welding head, it can perform excellent
welding with less surface flash and expulsion and burns.
Function to monitor current, voltage, power and pulse width for judgment of weld
quality
Use of an inverter allows for high power factor and stable power conditions
Easy setting of a variety of items through the menu selection system
High thermal efficiency, reduced weld time and less thermal effect on the
surroundings are obtained because this power supply does not have
no-current-carrying time as in thyristor phase control.
Peltier effect (polarity effect) and uneven wear of electrodes, which are the problems
in DC welding, seldom occur, because this power supply performs AC welding.
Finer weld time setting in 0.2
ms and fine processing are possible, because the
control frequency is 5
kHz.
Stable welding current is always obtained, because this power supply is primary
constant-current controlled.
This power supply can be used for various purposes, because not only weld time but
also upslope and downslope can be set for the welding takt.

MIH-200A
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 when the power is supplied to the Power Supply.
2) [READY] lamp (Green LED)
This lamp lights when the system is ready to start welding.
To turn on this lamp:
・[WELD ON/OFF] key
・WELD ON/OFF setting for program unit MA-627A and
・External WELD ON signal
must all be on.
POWER
ON
OFF
RESET
TROUBLE
WELD
POWER
WELD
ON/OFF
READY
START
WELD
TROUBLE
INDICATOR
PROGRAM
MONITOR
I/O
RS-232C/485
10)
9)
8)
1)
2)
3)
4)
5)
6)
7)
ＯＮ／Ｏ Ｆ Ｆ
ＷＥ ＬＤ
ＳＴＡＲＴ
ＰＯＷ Ｅ Ｒ
ＲＥＡＤ Ｙ
ＷＥ ＬＤ
ＷＥ ＬＤ
ＴＲＯＵＢ ＬＥ
ＴＲＯＵＢ ＬＥ
ＲＥＳＥ Ｔ

MIH-200A
3. Name and Functions of Each Section
3-2
3) [START] lamp (Green LED)
This lamp remains lit while the 2ND signal is input.
4) [WELD] lamp (Green LED)
This lamp remains lit while the welding current is flowing.
5) [TROUBLE] lamp (Orange LED)
This lamp lights when an error is detected. At this time, the program unit emits a
beeping sound, and the Power Supply operation is interrupted.
6) [TROUBLE RESET] key
If this key is pressed while the [TROUBLE] lamp is lit, the lamp is turned off.
The [TROUBLE] lamp lights up again, however, as long as the error remains
uncorrected. Eliminate the cause of the error before pressing this [TROUBLE
RESET] key.
If the [TROUBLE] lamp lights up during operation, press the [TROUBLE
RESET] key, then input the 2ND signal again; operation will then resume.
7) [WELD ON/OFF] key
This key is one of those required to activate the [READY] lamp.
Pressing this key alternately lights and shuts off this lamp. When the key is
toggled on, the [READY] lamp lights, and when the key is toggled off, the lamp is
turned off. Hold down this key to toggle ON and OFF.
8) Welding Current Input Breaker Lever
Raise the lever to supply power and lower it to shut off power.
9) [RS-232C/485] connector
For external communication. This is not used on this Power supply.
10) [PROGRAM MONITOR I/O] connector
Connects to Program Unit MA-627A. Used for welding schedule setting and/or
reviewing monitor results.