Yokota WU-1 User manual

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Wireless Unit for battery pulse tools
WU-1
Instruction Manual
Thank you for purchasing YOKOTA products.
Before use, please read this Instruction Manual carefully and use the product
properly after fully understanding the Manual.
Please be sure to keep this Instruction Manual.
YOKOTA INDUSTRIAL CO., LTD
Head Office/Factory 5-55 Nishiiwata 3-chome, Higashiosaka City, 578-0947 Osaka, Japan
TEL.: [phone] FAX. [phone]
http://www.yokota-kogyo.co.jp

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目次
1. SAFETY CARE.............................................................................................................................3
2. GLOSSARY ..................................................................................................................................8
3. SPECIFICATION.........................................................................................................................11
4. EACH PART DESCRIPTION.......................................................................................................12
5. PAIRING .....................................................................................................................................14
6. SETTING METHOD ....................................................................................................................16
7. SETTING ITEMS.........................................................................................................................19
8. JUDGEMENT OF TIGHTENING .................................................................................................29
9. ASSIGNMENT OF OUTPUT RELAY AND INPUT TERMINAL....................................................31
10. MAINTENANCE AND INSPECTION...........................................................................................32
11. TROUBLESHOOTING ................................................................................................................34
12. EXTERNAL VIEW.......................................................................................................................36

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1. Safety Care
Warning
Please be sure to thoroughly read this Operation Manual and fully understand the instruction to use
correctly, before installation, operation and inspection.
In this Instruction Manual, safety precautions prefix either of the following safety alert pictograms.
All are important items relating to safety and must be observed.
Warning･･･ Cases where mishandling induces a potentially hazardous situation, which, if not
avoided, could result in a death or serious personal inquiry.
Caution･･･ Cases where mishandling induces a potentially hazardous situation, which, if not
avoided, may result in minor or moderate personal injury or property damage.
※Notes: Even items described in “Caution”may lead to serious consequences depending on
circumstances.
・Retain this instruction Manual in a place where it is always available for anyone who needs to use it.
・In cases where you lost this Instruction Manual or the warning label affixed to the product or made it dirty,
immediately contact us or your YOKOTA representative to obtain the Manual or the warning label, and
then properly retain the Manual or replace the warning label.
・In cases where you transfer or rent this product, be sure to attach this Instruction Manual to it.
・Should you have any questions about the product you purchased or this Instruction Manual, please
contact us or your YOKOTA representative.
■Please use this product by connecting with the power supply supplied from "Electric work for the
business" decided by the Article 38 of Electric Business Act. It is not possible to use it by
connecting with "Electric work for general" (generally, commercial power source in the home, the
shop, etc.).
1.1. Working Environment
Warning
・Ensure that the workplace is sufficiently light.
Working in a dark place may result in accident or injury.
・Do not operate the tool and charge the battery in explosive atmospheres, such as in the presence of
flammable liquids, gases or dusts.
There is fear of fire.
・Keep anyone, particularly children, other than those involved in the work away from the work site.
Not doing so could induce a hazardous situation.
Otherwise, it may cause injury.

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・Take drop preventive measures such as use of safety wire to work in high places. Also be careful for the
falling-off accident, by confirming surely the safety of scaffolding.
・Do not install this product in a place likely to be exposed to water, direct sunlight, much dust, heat, oil, or
moving parts of industrial equipment. Otherwise, it may cause fire, electric shock, or accident.
1.2. Electrical Safety
Warning
・This product is for the indoor exclusive use. Do not use it in rain, in a damp place and a wet place.
Moreover, never use it in the place with the fear of the ignition and the explosion, because those are
hazardous situation.
・Do not move by holding the power cord. Do not pull the cord to remove the plug from the socket-outlet.
Avoid damage of cord due to stepping, entangling, or unreasonable force.
・Avoid pinching of power cord in the object to be tightened or surrounding facility in the tool operation and
avoid the contact with rotating parts. The power cord may be damaged and it may results in accident.
・Use the battery charger at rated supply voltage (AC 100-240 V).
Do not use DC power supply, engine generator, or power transformer.
・Keep away from sources generating large electromagnetic noise, such as welder, DC brush motor.
・Be sure to use the provided power supply cord. Use of other power supply cord may cause malfunction,
heat generation, or fire.
・Be sure to fully insert the power plug.
Failure to do so may result in electric shock or fire due to heat generation.
・If you do not use the product, unplug from the receptacle.
Wipe out dust or stain accumulated on the power plug or receptacle with a dry cloth.
Failure to do so may result in electric shock or fire.
・Do not insert or remove the power plug from the receptacle with wet hand.
Doing so may result in electric shock.
・Do not operate the switch with wet hand. Doing so may result in electric shock.
1.3. Human Safety
Warning
・Do not use the tool when you are tired or under influence of drugs, alcohol or medication.
A moment of inattention during the use of tool may result in serious personal injury.
・To protect yourself, wear personal protective equipment such as a hard hat(helmet), safety glasses,
safety shoes.
And depending on work environment, wear earplugs, a dust mask etc.
・Working in unusual positions is dangerous. Hold the tool securely and carry out working in stable posture,
preparing for accidental movement at the same time.

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・Dress properly. When working, do not wear loose clothes or jewellery such as necklace. If your hairs are
long, bundle them with rubber ring to avoid contact with the tool and wear a protective cover such as
cap. Otherwise, it may cause injury.
1.4. Operation and Care
Warning
・To prevent bodily injury due to installation, e.g. in the event of earthquake, install the product firmly.
・Do not load on the top of the product. Doing so may result in injury due to drop.
・Install the product on non flammable material such as metal. Failure to do so may result in fire.
・Do not place flammables near the product. Failure to do so may result in fire.
・Install the product in a stable, less vibrating place capable of withstanding its weight, in consideration
of the communication range with the tool used.
・Keep the antenna away from the wall. If it is near the wall, the effect of reflection from the wall may make
the communication status worse. Keep it away from the wall as far as possible.
・Ask electrical work professionals to do wiring work. Failure to do so may result in electric shock or fire.
・Ensure correct and secure wiring.
・Avoid tangle or pinching of the power supply cord.
・Avoid the use by persons inexperienced for handling. Otherwise, it may result in injury and/or accident.
・Handle the power tool carefully. Abuse may cause accident and/or malfunction. Do not give impacts on it
by throwing or dropping it.
・Do not place obstacles around the antenna. If any obstacle, such as metal in particular, exists, it may
interfere with the transmission of radio wave.
・Do not set more than one wireless unit close to each other to pairing mode at the same time.
Doing so may interfere with normal pairing of the tool.
・Do not hit the antenna. When a strong impact is applied on it, it may be damaged.
In addition, breakage of wire may occur in it and disable the communication.
・Do not make the foreign object such as metal pieces, invaded to the product. There is fear of fire.
・NEVER make any modification. Doing so could result in accidents. In addition, never use the spare part
other than the genuine one.
・Do not remove the parts. If you use as the mounted parts or screws removed, it may cause accident.
・If you feel uneasiness during the use, stop using the tool immediately and ask repair and inspection to
YOKOTA or YOKOTA-authorized or designated servicing factory via the sales outlet or sales
representative. If any accident or problem occurs due to the customer’s intended action such as
disassembly of this product, we shall not be liable for such trouble.
・Do not supply the current exceeding the specified limit to input terminal. Doing so may result in fire.
・Store the product in the dry area, where children or untrained person can not get access to. It is
dangerous for the untrained person to use it.

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1.5. Maintenance, Inspection, and Repair
Warning
・Before maintenance, inspection, or replacement, unplug the power supply cord.
・Only qualified service personnel are allowed to do maintenance and repair. Repair or maintenance
performed by non-qualified personnel may result in serious personal injury of the user.
・Wipe out the dirt on the housing of the tool by using the dry and soft cloth.
Do not use the chlorinated solvent, gasoline, thinners and the like, which work to melt the plastic.
・Ask repair and inspection to YOKOTA or YOKOTA-authorized or designated servicing factory via the
sales outlet or sales representative where you bought the product. If any accident or problem occurs due
to the customer’s intended action such as disassembly of this product, we shall not be liable for such
trouble.
・Do not open the cover of the unit, except that electric professional may remove and replace the built-in
battery.
・Do not replace the built-in battery, unless you are not an electric professional. Doing so may result in
injury or fire.
・Never charge the built-in battery. Doing so may heat the electrolyte in the battery and generate gas
increasing the internal pressure. Then the battery may leak, heat, rupture, or ignite.
・Use the built-in battery for specified purpose only. Failure to do so may result in incompatibility of terminal
configuration, etc. with the equipment, or mismatch of specification or performance.
It may result in leak, heat, rupture, or ignition of the battery.
・Do not put the built-in battery into fire, heat, disassemble, or modify it.
It may result in leak, heat, rupture, or ignition of the battery.
・Do not reverse the positive and negative terminals of the built-in battery.
Doing so may result in abnormal reaction due to short-circuit, and it may result in leak, heat, rupture, or
ignition of the battery.
・If the electrolyte of the built-in battery gets in your eyes, do not pass your hand over your eyes, but flush
the eyes with clean water well and seek medical attention.
・Do not bridge the positive and negative poles of the built-in battery with a wire. Do not carry or store the
battery together with metal necklace or hair pin. Doing so may result in abnormal reaction due to
short-circuit, and it may result in leak, heat, rupture, or ignition of the battery.
・In the event of leakage or unusual odor of the built-in battery, dispose of it as leaked electrolyte may
corrode metal parts.
・Do not solder the built-in battery directly. Doing so may result in leak, heat, rupture, or ignition of the
battery.
・Do not drop or throw the built-in battery to give a strong impact on it or deform it. Doing so may result in
leak, heat, rupture, or ignition of the battery.

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Caution
・Do not leave or store the built-in battery in a place exposed to strong direct sunlight or in a car under the
scorching sun. Doing so may result in leak, heat, or rupture of the battery.
・Do not expose the built-in battery to water, etc. Doing so may result in heat generation of the battery.
・When disposing of this product, ask electric professional to remove the built-in battery.
・When disposing of the built-in battery, insulate the positive and negative poles with an insulating tape.
・Dispose of the main unit and the built-in battery in accordance with segregation methods, laws and
regulations of the location of use.

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2. Glossary
(1) Tightening Torque:
Output torque on completion of tightening.
(2) Tightening Pulses:
The number of pulses between the display start torque and tightening completion.
(3) Work:
A set of tightening points under the same tightening conditions.
(4) WORK Start:
The work selection input becomes start. With the group management function is on, when the
work switching input is turned on, the remaining number of bolts is initialized and the group
management starts.
(5) AUTO CLEAR:
A function used to automatically clear the count when the number of remaining tightening points
reaches zero.
(6) END LS:
A function to judge group management with the LS set as END LS turned ON.
(7) COUNT NG:
Output when the tightening bolt number does not reach to the preset number at the input of END
LS. After COUNT NG, when the tightening number reaches to the preset number, the output
becomes OFF.
(8) WORK SEL:
Following work selection can be selected:
「BIT」: Work can be selected by inputting work a ~ d.
「DATA」: Work a ~ d can be selected by the input combination of input terminals WORK a and
WORK b.
When selecting「DATA」, a ~ d Work can be selected by the input combination of input terminals
WORK a and WORK b. And after the establishment of WORK c input, designated work can be
changed.
a
b
c
d
WORK a
×
○
×
○
WORK b
×
×
○
○
WORK c
○
○
○
○
○：Input ×：No Input
(9) Sleep Time [SLEEP TIME]：
Time after throttle OFF till the power to the tool is turned off.
(10) START TRQ.:
Threshold torque to judge OK or NG.
No judgement of OK or NG is made if the torque is less than this threshold value.

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(11) SWITCH TRQ.:
Torque at which middle speed is switched to high speed.
(12) MIN. TRQ.:
A lower limit value to make a judgment of OK/NOK.
(13) CUT TRQ.:
A torque value at which motor is automatically stopped while tightening.
(14) MAX TRQ.:
A upper limit value to make a judgment of OK/NOK.
(15) FREERUNNING ANG:
Angle between the point where a main shaft starts to rotate and the display start torque.
(16) FINAL ANG:
Angle between the display start torque and the tightening completion point.
(17) FREERUNNING TIME:
Time to display start torque after main shaft starts rotation.
(18) FINAL TIME:
Time to tightening completion from display start torque.
(19) STOP ABORT TIME:
When the rotation of main shaft is stopped for more than this time, free running angle will be
set to 0.
(20) MOTOR LOW SPEED:
Rotation speed at no load when the tool throttle lever is set to the first step.
(at forward and reverse rotation)
(21) MOTOR MID. SPEED:
Rotation speed at no load when the tool throttle lever is set to the 2nd stage. (when right rotation)
※In case of reverse rotation, setting of mid-speed is not valid (only low and high speed is valid).
(22) MOTOR HIGH SPEED:
Rotating speed at no load when the Middle to High speed switching torque is achieved. (when
right rotation)
Rotation speed at no load when the tool throttle lever is set to the 2nd stage. (when left rotation)
(23) JUDGE TIME:
A set period of time to make a tightening judgment if there is no pulse during the period after the
pulsing.
(24) BOLT CO-EFFICIENT:
A coefficient number to recalculate the displayed torque of the Wireless Unit if the displayed torque
greatly differs from actual torque.
(25) AVERAGE NUM.:
The arithmetic average from the preset number of pulses to display torque.
(26) SKIP NUM.:
The number of pulses in excess of the displayed start torque, which will be ignored.

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(27) SLOW ERR NO.:
The number of pulses in excess of the preset number of pulses. Consequently, a slow error will
result.
(28) COMPEMC NUM:
The number of pulses preset as compensation pulses, which will be performed after the display
torque exceeds the cut torque, and the motor will be automatically stopped.
(29) BOLT NUMBER:
The number of tightening points of a single work with the group management function used.
(30) PASS:
The forced completion of work.
(31) RESET:
A function to cancel the output of each relay and initialize the remaining bolt number.
(32) SLOW2:
A tightening state where the number of pulses in excess of the number of SLOW ER pulses
though the range of torque tightening is okay.
(33) RELAY TIME:
A function to specify the time to keep relay pulse output signal on.
(34) RUNDOWN:
Tightening data per one bolt.
(35) AD Val:
A mode in which a torque signal applied to the main shaft is displayed.
(36) A USB connector:
A USB thumb drive (USB flash storage) is connected to save tightening data and the set value. A
USB thumb drive formatted by the FAT32 form with the capacity 8GB or less can be used. There is
a possibility that the USB thumb drive cannot be used according to the usage condition of the USB
memory or a type of the USB thumb drive. Moreover, as the data to be saved is going to saved
under the same file name, please make sure to copy or save the existing file written in the USB
thumb drive to another media. The USB thumb drive formatted by the NTFS or other form must
be reformatted by the FAT32 form using a PC. In that case, all the data previously saved will be
deleted. Therefore, please make sure to format the USB thumb drive after making a backup of
the data to another media.
If USB memory is provided with special function such as write-protect, its operation may be limited
or it cannot be used.

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3. Specification
Model
WU-1
External dimension
54mm (W)×249 mm(H)×188 mm(D)
Weight
1Kg
Ambient operating
temperature
0 –45 ℃
Ambient operating humidity
35 –80 % RH (without condensation)
Power supply used
AC100-240 V±10% 50/60Hz
Power supply capacity
80 VA
I/O terminal block
8 points for input (DC 24V built-in power source used)
8 points for output (no-voltage contact signal)
The length of the cable must be less than 10 m.
Specification of input
terminal
Driving voltage: DC 24V±10%
Driving current: 5 mA TYP.
Specification of output
terminal
Maximum load: DC 30V 0.5 A
(Minimum load: 5 V 1 mA)
Serial port
RS-232C D-sub 9P
The length of the cable must be less than 10 m.
LAN
10BaseT/100BaseTX auto-detect
Note) Attach a noise filter (accessory of LAN specification: sleeve ferrite clamp,
GRFC-6 manufactured by Kitagawa Kogyo) on LAN cable (interconnecting cable
with HUB, etc.), at the nearest point to the main unit (see the photo below).
The length of the cable must be less than 30 m.
USB
A-female connector
Connector for DS-1
I2C female connector (5-pin)
The length of the cable must be less than 10 m.
Connector for PC-1
I2C female connector (6-pin)
The length of the cable must be less than 10 m.
Standard accessory
AC adaptor of 2 m, Power supply cord of 1.5m, Stand,
Noise filter (sleeve ferrite clamp GRFC-6)
Special accessory
Rubber feet (C-30-RK-15-EP-UL-Black)
Fixing screw for rubber feet (cross-recessed head round machine screw M3×6）
Coin type lithium battery (CR2032)
Installation of noise filter

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4. Each part description
①Power LED
When the power is ON, LED (green) lights up.
②TOOL LED (TOOL 1-4)
Paired TOOL number lights up in green.
When the tightening is OK, it lights up in green. If not OK, it lights up in
red.
③USB connector
Connector for connection of USB memory, to save tightening data, setting
data, etc.
④Pairing button
Button for pairing with the tool.
⑤RS-232C connector
Port for communication with external device. Use RS-232C cable (9P
male: straight) for communication.
⑥Ethernet connector
Connector for Ethernet connection.
⑦I/O terminal block
Terminal block for input and output. It has 8 points for input and output
respectively, and 24 V output.
The terminal block is removable, but keep checking the terminal No. on
the terminal block when attaching, and take great care to avoid
misconnection.
⑧Connector for PC-1
Connector for the cable for PC-1.
⑨Connector for DS-1
Connector for the cable for DS-1.
⑩Power switch
Switch to turn ON/OFF the power to the wireless unit.
If the unit is not used, turn the switch OFF.
⑪AC adapter terminal
Terminal for connection of AC adapter.
⑫Period of replacement of
battery
Period of replacement of the built-in battery (coin type lithium battery
(CR2032).
②
③
④
④
⑤
⑥
⑦
⑪
⑧
⑨
⑩
①

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●Descriptions of symbols
WARNING: Indicating that mishandling may result in death or serious injury of the user.
: Be sure to read this Manual before use and use the product correctly after you fully
understand its contents.
: POWER
: SERIAL PORT
: USB PORT
: LAN
: DS-1 Connector
: PC-1 Connector
: POWER ON
: POWER OFF

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5. Pairing
To operate the tool, pairing with the wireless unit (initial connecting action) is required.
After turning on the wireless unit, carry out pairing according to the following steps.
5.1. Install the battery pack to the tool.
5.2. Pull the throttle lever.
It beeps and the tool is activated.
5.3. Press the pairing button of the wireless unit for a while.
Press the button until the LED of TOOL1 of the wireless unit lights up in red.
5.4. Press the pairing button of the wireless unit for a short period and select the TOOL
number to be paired.
Every time you press the button for a short period, the lighting of LED moves.
5.5. Press the pairing button of the wireless unit for a while.
Press the button until the LED blinks fast.
Pairing button

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5.6. Press the pairing button of the tool.
Press the button with the flat face of TF pin 2 x 90 until it beeps and the LED of the tool blinks
fast in yellow.
*Do not continue to press the pairing button after the buzzer beep and fast blinking of the
LED.
*After the battery pack is installed and the throttle lever is pulled, make sure that the LED
blinks in blue or yellow. Then press the pairing button.
Regarding the blinking of the LED, if the pairing is done, it blinks in blue (only one
blinking). If the pairing is not done, it blinks in yellow (repeated blinking).
5.7. When the LED of the tool lights in red and goes off, the pairing is completed.
The wireless unit transmits the set value and the tool is ready to operate.
The LED of selected TOOL number on the wireless unit lights in green.
*1: If the LED lights in purple, pairing is failed. Carry out the steps as described in 5.6.
*2: Even if the battery pack is removed and inserted again, the pairing status is maintained.
OK to push
Throttle
Buzzer
Blue LED
（Pairing completed)
Pairing Button
Yellow LED
（Pairing not completed)
Buzzer beeping & LED fast blinking
Do not push. Do not push.
Figure 1 Pressing-down timing of pairing button (After attaching the battery pack.)

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6. Setting Method
Set values can be changed on the browser of your PC or PC-1.
For setting on the browser, follow the steps below.
For setting method by PC-1, see the Instruction Manual of PC-1.
* During the setting on the browser, do not set by PC-1.
6.1. Set the IP address of PC.
◆In case of Windows XP
◆In case of Windows 7
6.2. Connect this product and PC with LAN cross-cable.
6.3. Open the Internet Explorer.

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6.4. Enter “http://192.168.124.20/” and press Enter.
The browser is started.
Selecting English on right above, language is changed to English.
6.5. Select TOOL No. or WIRELESS UNIT for which the language and set values are read and
written.
The setting screen is opened.
【Ex.】“Tool 1 setting” is chosen（ENGLISH）
【Ex.】”Wireless unit” is chosen（ENGLISH）

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6.6. Read and write the set values according to the following steps.
Reading the set value: Select “read” and press “EXECUTE”.
Writing the set value: After the set value is changed, select “write” and press “EXECUTE”.
* After you enter the value out of the entry limit range, if “write” is chosen and “EXECUTE” is
pressed, the following error message appears and the set value is not changed.
Error Message

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7. Setting Items
7.1. Setting of tool 1 –4
7.1.1. All work common setting items
Q’TY CONTROL
Set contents
Selection
Default
Setting ON/OFF of Q’TY CONTROL.
OFF
ON
OFF
START CONDITON
Set contents
Selection
Default
Selecting the start condition of Q’TY CONTROL.
※If the setting is changed, remove and insert the battery pack of the tool.
WORK S
FASTN
WORK S
WAITING
Set contents
Selection
Default
Selecting the operation after completion of the work.
STOP
RUN
STOP
AUTO CLEAR
Set contents
Selection
Default
Setting AUTO CLEAR.
ON: When the remaining quantity becomes zero, it is cleared.
*This setting is valid only when the start condition is FASTN.
OFF：Even when the remaining quantity becomes zero, it is not cleared.
When PASS, RESET signal, or WORK S signal is entered, the remaining
quantity is cleared.
OFF
ON
OFF
END CONDITION
Set contents
Selection
Default
Selecting END CONDITION of Q’TY CONTROL.
END LS
NUNBER
END LS
TOOL BUZZER
Set contents
Selection
Default
Setting ON/OFF of tool buzzer at tightening judgement.
OFF
ON
ON
TOOL LAMP
Set contents
Selection
Default
Setting ON/OFF of tool lamp at tightening judgement.
OFF
ON
ON

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WORK SEL
Set contents
Selection
Default
Setting WORK SEL.
BIT：
DATA：
BIT
WAVE DATA OUTPUT
Set contents
Selection
Default
Setting ON/OFF of WAVE DATA OUTPUT.
ON: Output from the tool to the wireless unit.
OFF: No output from the tool to the wireless unit.
* To send output to external device from the wireless unit, set “WAVE DATA
DESTINATION” ON.
（see Cl. 7.2.3.3）
OFF
ON
OFF
SLEEP TIME
Set contents
Selection
Default
Setting SLEEP TIME.
0-100（min）
If “0” entered：Not sleep
* If YS-e controller board is
before Ver.1.01, 0-10(min)
1
LIMIT WORK
Set contents
Selection
Default
Setting the number of work to be used.
1：a
2：a,b
3：a,b,c
4：a,b,c,d
1
ID SETTING
Set contents
Selection
Default
Setting the ID number of the tool.
0～9999
0000