F340A
DIGITAL INDICATOR
OPERATION MANUAL
14 Feb. 2012
Rev. 1.38
Introduction
We appreciate your kind purchase of F340A Digital Indicator.
To take full advantage of high performance of F340A, Thoroughly read this operating
manual first before use and understand the explanations contained herein for correct
operating procedures.
Introduction
Safety Precautions
Be sure to read for safety.
In order to have an F340A Digital Indicator used safely, notes I would like you to surely
follow divide into and , and are indicated by the following
documents.Notes indicated here are the serious contents related safely.Please use after
understanding the contents well.
WARNING
CAUTION
WARNING
Misuse may cause the risk of death or serious
injury to persons.
CAUTION
Misuse may cause the risk of injury to persons
or damage to property.
Safety Precautions
WARNING
● Use F340A with correct supply voltage.
● Do not carry out the direct file of the commercial power supply to a signal input terminal.
● Carefully check wiring, etc. before applying power.
● Set the correct Excitation Voltage for the sensor. （10V is set when F340A is
dispatched from us.）
● Do not disassemble the main body for modifications or repair.
● Be sure to ground the protective ground terminal.
● When smoke, a nasty smell, or strange sound, please shut off a power supply
immediately and extract a power supply cable.
● Do not install in the following environments.
- Placeｓ containing corrosive gas or flammable gas.
- Where the product may be splashed with water, oil or chemicals.
Safety Precautions
Safety Precautions
CAUTION
● Be sure to disconnect the power cable when performing the following.
- Attachment/detachment of connectors of options.
- Wiring/connection of cables to terminal blocks.
- Connection of the ground line.
● Take an interval of more than 5 seconds when repeating ON/OFF.
● For connection to the signal I/O terminal block, wire correctly after checking the signal
names and terminal block numbers.
Also, turn off the power of the main body before connection/wiring to the signal I/O
terminal block.
● Use shielded cables for the connection of strain gauge type sensor, displacement
sensor, External input and output or options.
● Take adequate shielding measures when using at the following locations.
- Near a power line.
- Where a strong electric field or magnetic field is formed.
- Where static electricity, relay noise or the like is generated.
● Do not install in the following environments.
- Where the temperature and/or humidity exceeds the range in the specifications.
- Places with large quantities of salt or iron powder.
- Where the main body is directly affected by vibration or shock.
● Do not use it, broken down.
● When you send F340A by repair etc., please take sufficient measures against a shock.
CONTENTS
CONTENTS
1． FUNCTIONAL DESCRIPTIONS ................................................................... 1
1-1． Front Panel .......................................................................................... 1
1-1-1． Status Display ............................................................................ 1
1-1-2． Numerical Display ...................................................................... 2
1-1-3． Setting Key Pad ......................................................................... 2
1-2． Rear Panel ........................................................................................... 4
1-2-1． GUARD GROUND ..................................................................... 4
1-2-2． Frame Ground (Functional ground) ........................................... 4
1-2-3． Options Slot ............................................................................... 4
1-2-4． AC Power Input Terminal Board ................................................ 4
1-2-5． Signal Input/Output Terminal Board........................................... 5
2． CONNECTION .............................................................................................. 7
2-1． Connecting to Cage Clamp Terminal Block ......................................... 7
2-2． Connecting Strain Gauge Sensor ........................................................ 8
2-3． Connecting Power Input Terminal........................................................ 9
2-4． Connecting SI/F ................................................................................. 10
2-5． Connecting High / Low Limit Relays .................................................. 11
2-6． Connecting Hold and Digital Zero Signals ......................................... 12
2-7． Connecting Analog Monitor Output (VOL OUT)................................. 13
3． SETTING MODE CONFIGURATION.......................................................... 14
3-1． Selection of Setting Items .................................................................. 14
3-2． Display of Setting Items ..................................................................... 16
3-3． List of Values ..................................................................................... 17
3-4． Setting Procedure .............................................................................. 19
4． CALIBRATION ............................................................................................ 20
4-1． Equivalent Input Calibration Procedure ............................................. 21
4-2． Actual Load Calibration...................................................................... 26
5． SETTING OF FUNCTIONS......................................................................... 31
5-1． High /Low Limit Value ........................................................................ 31
CONTENTS
5-2． High / Low Limit Comparator Mode ................................................... 33
5-3． Hysteresis .......................................................................................... 34
5-4． Digital Offset ...................................................................................... 37
5-5． Near Zero........................................................................................... 38
5-6． Digital Filter ........................................................................................ 39
5-7． Analog Filter....................................................................................... 40
5-8． Motion Detect..................................................................................... 41
5-9． Zero Tracking..................................................................................... 43
5-10． Hold Mode........................................................................................ 45
5-11． Automatic Printing............................................................................ 46
5-12． Hold Value Printing .......................................................................... 48
5-13． LOCK ............................................................................................... 49
5-14． Scale Division .................................................................................. 50
5-15． Display Frequency ........................................................................... 51
5-16． Excitation Voltage ............................................................................ 52
6． HOLD FUNCTION...................................................................................... 53
6-1． Peak Hold .......................................................................................... 53
6-2． Sample Hold Operation (Digital Hold)................................................ 56
7． DIGITAL ZERO FUNCTION........................................................................ 58
8． BCD DATA OUTPUT .................................................................................. 59
8-1． Connector Pin Assignment ................................................................ 59
8-2． Logic Switching .................................................................................. 60
8-3． Equivalent Circuit ............................................................................... 60
8-4． Signal Timing ..................................................................................... 61
8-5． BCD Data Update Rate Selection...................................................... 62
9． RS-232C INTERFACE ................................................................................ 64
Communication Specifications........................................................... 64
9-1．
9-1-1． Standard .................................................................................. 64
9-1-2． Connector Pin Assignment ...................................................... 65
9-1-3． About Cables ........................................................................... 65
9-2． Setting RS-232C Interface ................................................................ 66
CONTENTS
9-3． Communication Mode ........................................................................ 67
9-4． Communication Format...................................................................... 67
10． D/A CONVERTER..................................................................................... 72
10-1． Voltage Output
(Depending on the request at the time of order.) ............................... 72
10-1-1． Obtaining Voltage Output Signal............................................ 73
10-1-2． Setting of D/A Zero and Gain................................................. 73
10-1-3． About D/A Resolution............................................................. 74
10-2． Current Output
(Depending on the request at the time of order.) ............................... 75
10-2-1． Obtaining Current Output Signal............................................ 76
10-2-2． Setting of D/A Zero and Gain................................................. 76
10-2-3． About D/A Resolution............................................................. 77
10-3． Setting D/A Zero Full Scale.............................................................. 78
10-4． About D/A Output Error.................................................................... 79
11． DC POWER SOURCE .............................................................................. 80
12． OVERSCALE/ERROR DISPLAYS............................................................ 81
12-1． Overscale Display ............................................................................ 81
12-2． Calibration Error Display .................................................................. 81
13． SELF-CHECK FUNCTION AND INITIALIZATION.................................... 82
13-1． Self-Check ....................................................................................... 82
13-2． Initialization ...................................................................................... 84
13-3． F340A Block Diagram ...................................................................... 86
14． DIMENSIONS ........................................................................................... 87
15． SPECIFICATIONS .................................................................................... 88
15-1． Analog Section................................................................................. 88
15-2． Indicator Section ............................................................................. 89
15-3． Setting Section................................................................................. 89
15-4． External Signals ............................................................................... 89
15-5． Interface ........................................................................................... 89
15-6． Option .............................................................................................. 90
CONTENTS
15-7． General Specifications ..................................................................... 90
15-8． Accessories...................................................................................... 91
16． CONFORMITY TO EC DIRECTIVES ....................................................... 92
1. FUNCTIONAL DESCRIPTIONS
H I OK LOW PEAK HOLD
F340A
DIGITAL
INDICATOR
HOLD
ZERO
ESC
DOWN
SEL
ENT
UP
FNC
SHIFT
CAL
GAIN
STATUS
NUMERICAL
SETTING
DISPLAY
DISPLAY
KEY PAD
1-1. Front Panel
1.FUNCTIONAL DESCRIPTIONS
1-1-1. Status Display
The F340A status is indicated. Setting items are indicated when setting.
HI： This LED turns on when the indicated value is larger than the set value of the
OK： This LED turns on when the indicated value is smaller than the set value of
（low limit ≦ indicated value ≦ high limit）
LOW： This LED turns on when the indicated value is smaller than the set value of
PEAK： This LED is blinking when the Peak Hold function is activated.
high limit（indicated value ＞ high limit）
Operation of the high limit relay is on.
the high limit and larger than the set value of the low limit
the low limit（indicated value ＜ low limit）
Operation of the low limit relay is on.
HOLD： This LED turns on when the indicated value is the held value.
1
1.FUNCTIONAL DESCRIPTIONS
UP
DOWN
FNC
SEL
SHIFT
CAL
FNC
Indicated value display Setting mode“F1”
display
1-1-2. Numerical Display
The three types of display are provided.
1）Indicated value
2）Set value
3）Overflow display
• Minus overflow of the A/D converter （－ LOAD）
• Plus overflow of the A/D converter （LOAD）
• Indicated value overflowed （indicated value ＜－ 19999）（OFL1）
• Indicated value overflowed （indicated value ＞ 19999）（OFL2）
1-1-3. Setting Key Pad
These are keys for commanding settings and operations.
Increments by one the numeric in the blinking digit of the setting
item selection or set value.
Decrements by one the numeric in the blinking digit of the setting
item selection or set value.
Enters the setting mode. Setting mode“F1” is indicated.
This key sets a decimal point in the span calibration.
Enters the actual load calibration mode.
2
Select the setting mode number and the blinking digit of the setting
value in setting.
Enters the equivalent input calibration mode.
Inputs the minus sign in setting.
1.FUNCTIONAL DESCRIPTIONS
ENT
HOLD
ZERO
ESC
HOLD
ESC
setting in progress Indicated Value display
Validates setting items and set values.
Starts the Hold function. To cancel the Hold function,
press key again.
Forcibly resets the indicated value to zero （digital zero function）.
When the calibration LOCK is turned off, the digital zero function is
not activated using this key.External DZ input is also disabled.
Cancels setting and returns to the indicated value display.
3
1.FUNCTIONAL DESCRIPTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
N
AC IN
F. G.
SER. No.
MADE IN JAPAN
FRAME GROUND
SIGNAL
AC INPUT
OPTION SLOT
TERMINAL BOARD
TERMINAL BOARD
INPUT/OUTPUT
GUARD GROUND
1-2. Rear Panel
1-2-1. GUARD GROUND
This is a guard ground terminal block. Be sure to ground the guard ground terminal to
prevent electric shocks and failures due to static electricity.（The frame and the guard
ground terminal are conducted.）
1-2-2. Frame Ground (Functional ground)
This is a F.G terminal of AC input.（The frame and the F.G terminal are conducted.）
1-2-3. Options Slot
One option board can in stall in the option slot.
・BCD Parallel data output （BCO）
・RS-232C Interface （232）
4
・D/A Converter （DAC）
1-2-4. AC Power Input Terminal Board
Connect AC power code. The input voltage is 100V-240V AC.
The frequency is 50/60Hz.
1-2-5. Signal Input/Output Terminal Board
㧿㧱㧾㧚㧺
10
11
12
13
14
15
SER.N
1
11
12
13
14
15
2
3
4
5
6
7
8
9
10
SI/F
N/O
COM
High limit relay
Low limit relay
Hold input
COM
DZ input
Analog monitor output
Analog COM
＋ EXC
－ SIG
－ EXC
＋ SIG
SHIELD
N/O
COM
Strain gauge
Connect the shield
cable of the sensor.
sensor input
This terminal board is used for input/output of control signals, SI/F data output, and
input of strain gauge sensor signals.
・Terminal board Assignment
1.FUNCTIONAL DESCRIPTIONS
1・2 ： Two-wire serial interface （SI/F） for connecting printers and external display
from UNIPULSE.
This interface has no polarity and can connect up to three external devices.
Use parallel two-core cables or captire cables.
3 ～ 6： Output terminals of the high/low limit relays.
3・・・High limit relay （N/O）
4・・・High limit COM
5
1.FUNCTIONAL DESCRIPTIONS
5・・・Low limit relay （N/O）
6・・・Low limit COM
７・８： Terminals for inputting hold signals
7・・・Hold input
8・・・ COM
８・９： Terminals for inputting digital zero signals. Available in LOCK ON only.
9・・・DZ input
8・・・ COM
10・11： Terminal for output of a voltage proportional to the sensor input.
Output voltage is approx. 2V per 1mV/V(sensor input).
10・・・Voltage output （0 to Approx. ± 6V）
11・・・ COM
12 ～ 15：Terminal for connecting a strain gauge sensor
12・・・＋ EXC
13・・・ － SIG
14・・・－ EXC
15・・・ ＋ SIG
6
2. CONNECTION
0.2in
・Cable can be from 24 to 14AWG (0.2 to 2.5mm2)
・ It is not necessary to solder the cable wires or to fix a solderless terminal.
・If several cables to be inserted to the same hole,twist those cable wires
together and insert.
Request
2-1. Connecting to Cage Clamp Terminal Block
1.Strip the casing 0.2in (6mm) on the cable to be connected.
2.Twist the bare wire to fit the terminal hole.
3.Insert the supplied screwdriver into the upper hole and lift upward.
2.CONNECTION
4.Insert the twisted wires into the lower hole.
5.Make sure cable is clamped securely and does not come out with a slight tug.
7
2.CONNECTION
（＋ EXC）
（－ EXC）
（＋ SIG）
（－ SIG）
（SHIELD）
＋ IN
－ OUT
－ IN
＋ OUT
12
13
14
15
F340A
（＋ EXC）
（－ EXC）
（＋ SIG）
（－ SIG）
（SHIELD）
＋ IN
－ OUT
－ IN
＋ OUT
12
13
14
15
F340A
2-2. Connecting Strain Gauge Sensor
・4-wire sensor
・6-wire sensor
8
2-3. Connecting Power Input Terminal
Before connecting cables to the terminal block, put on
climp-style terminals (M3) to the cables as shown in the
figure so that the cables tips might not straggle.
Black
White
Green
L
N
AC IN
F. G.
6mm or less
Red
Black
＋
－
DC IN
F. G.
6mm or less
CAUTION
Be aware that the voltage drops depending on the wire thickness and length.
Also, never input an AC power source. Doing so will cause a failure.
AC spec.
Connect AC power code. The input voltage is 100V-240V AC.
2.CONNECTION
The frequency is 50/60Hz.
DC spec. (Depending on the request at the time of order)
Connect the positive (+) side of the power source to the red screw side of the terminal
block on the back of the F340A, and its negative (-) side to the black screw side.The
input voltage is 12V-24V DC.
9
2.CONNECTION
Converter
Display
Printer
SI/F
２
１
← Inside Outside →
F340A
2-4. Connecting SI/F
Two-wire serial interface （SI/F） for connecting printers and external display from
UNIPULSE.
This interface has no polarity and can connect up to three external devices.
Use parallel two-core cables or captire cables.
10
2-5. Connecting High / Low Limit Relays
N/O
COM
３
４
Load
Var istor
Spark Killer
AC
３
４
Spark Killer
DC
← Inside Outside →
← Inside Outside →
COM
N/O
Load
F340A
F340A
AC Power Supply
DC Power Supply
N/O
COM
５
６
← Inside Outside →
F340A
[ Low limit relay ]
Connect a spark killer as
near the load as possible.
Connect a diode as
near the load as possible.
Power Supply
Power Supply
N/O
COM
５
６
← Inside Outside →
F340A
[ Low limit relay ]
Rating is 250V AC and 0.5A.
Rating is 30V DC and 0.5A.
CAUTION
Overvoltage and overcurrent may cause breakdown of the relay as well
as shortening its life.
It is recommended to connect a spark killer etc. to the connected load
according to AC/DC (refer to the connection examples). With a noise
killer, you can make the life of the relay longer as well as making it
resistible against noise.
Never short-circuit the load.
Should you do it, the equipment will break down.
・Connecting External Load
[ High limit relay ]
2.CONNECTION
11
2.CONNECTION
Vcc
←
Inside
Ic=Approx.8mA
COM
Push
switch
Toggle relay
switch
Relay
Contact
Transistor
+12V
IN
IN
TTL open
7
8
Outside →
F340A
collect output
[ Hold input ]
Ic=Approx.8mA
COM
Push
switch
9
8
[ DZ input ]
Connect 9 and 8.
(ON when IN is ’H)
CAUTION
・Avoid applying external voltages to the signal
・Use external elements which withstands Ic=10mA
・Leakage current from external element must be 30μA or below
2-6. Connecting Hold and Digital Zero Signals
・Equivalent circuit （input）
12
2-7. Connecting Analog Monitor Output (VOL OUT)
10
＋
－
External device
Load resistance
2kΩor above
SIG
GND
← Inside Outside →
11
F340A
Terminal for out put of a voltage proportional to the sensor input .
Output voltage is approx. 2V per 1mV/V(sensor input).
2.CONNECTION
13
3.SETTING MODE CONFIGURATION
FNC
Setting Mode 1
High Limit
Low Limit
Hysteresis
Digital
Near Zero
Digital Filter
Analog Filter
Motion Detect
Motion Detect
Zero Tracking
Zero Tracking
Hold Mode
Automatic Printing
Hold Value Printing
Offset
Setting Mode 2
UP
DOWN
DOWN
UP
DOWN
UP
UP
DOWN
SEL SEL
High/LowLlimit
（band）
（time）
（time）
（band）
Comparison Mode
(P.31)
(P.31)
(P.33)
(P.34)
(P.37)
(P.38)
(P.39)
(P.40)
(P.41)
(P.41)
(P.43)
(P.43)
(P.45)
(P.46)
(P.48)
3. SETTING MODE CONFIGURATION
3-1. Selection of Setting Items
14
LOCK
Scale
Display
BCD Data
Update Rate
RS-232C
D/A Full Scale
Setting Mode3 Setting Mode4
UP
DOWN
Excitation
UP
DOWN
DOWN
UP
DOWN
UP
SEL
D/A Zero Setting
Setting
Frequency
Division
Vo l t a g e
(P.49)
(P.50)
(P.51)
(P.52)
(P.66)
(P.78)
(P.78)
(P.62)
3.SETTING MODE CONFIGURATION
15
3.SETTING MODE CONFIGURATION
Blnking OFF
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
3-2. Display of Setting Items
・Mode1
(1) High Limit
(2) Low Limit
(3) High/Low Limit Comparison
Mode
(4) Hysteresis
(5) Digital Offset
(6) Near Zero
・Mode2
(1) Digital Filter
(2) Analog Filter
(3) Motion Detect（time）
(4) Motion Detect（band）
(5) Zero Tracking （time）
(6) Zero Tracking（band）
(7) Hold Mode
16
(8) Automatic Printing
(9) Hold value Printing
・Mode3
HI
OK LOW HOLDPEAK
HI
OK LOW HOLD
PEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
HI
OK LOW HOLDPEAK
・Mode4
3.SETTING MODE CONFIGURATION
(1) LOCK
(2) Scale Division
(3) Display Frequency
(4) Excitation Voltage
(1) BCD Data Update Rate
(2) RS-232C
(3) D/A Zero Setting
(4) D/A Full Scale Setting
3-3. List of Values
Setting Mode1
1 High Limit 075.00
2 Low Limit 025.00
3
4 Hysteresis 00.00
5 Digital Offset 000.00
Item Default Set Value
High/Low Limit Comparison Mode
Calibration
LOCK
LOCK
○
○
0
○
○
○
6 Near Zero 001.00
○
17
3.SETTING MODE CONFIGURATION
Setting Mode2
Item Default Set Value
1 Digital Filter 0
2 Analog Filter 2
3
Motion Detect（time）
4
Motion Detect（band）
5
Zero Tracking（time）
6
Zero Tracking（band）
7 Hold Mode 0
8 Automatic Printing 1
9 Hold Value Printing 0
Setting Mode3
Item Default Set Value
1.5
05
0.0
00
LOCK
○
○
○
○
○
○
○
○
○
LOCK
Calibration
LOCK
Calibration
LOCK
1 LOCK 0000
2 Scale Division 0.01
3 Display Frequency 3
4 Excitation Voltage 1
Setting Mode4
Item Default Set Value
1 BCD Data Update Rate 0
2 RS-232C 13010
3 D/A Zero Setting 000.00
4 D/A Full Scale Setting 100.00
※ default：factory-set value
LOCK
○
○
○
○
○
○
○
Calibration
LOCK
18
3-4. Setting Procedure
UP
DOWN
FNC
ENT
ESC
SEL
SEL
SEL SEL SEL
UP
DOWN
UP
DOWN
UP DOWN
UP
DOWN
ENT
“F2” of setting Mode2 “F3” of setting Mode3 “F4” of setting Mode4
Select a
setting item..
The most significant digit starts blinking
Select a digit where setting is desired.
Set a value.
If wishing to affix a sign to the high/low limit
and d
igital offset, D/A zero setting full scale
setting, press key.
SHIFT
CAL
Set Value is validated.
Setting Mode is terminated to return to
“F1” of setting Mode1
is displayed.
is displayed.is displayed.is displayed.
Select a
setting item..
Select a
setting item..
Select a
setting item..
to prompt setting.
the indicated value display.
If one minute has elapsed after key is pressed without any key hit
before key is pressed,the setting is canceled and the indicated value is displayed
again. The set value is not stored in this case.
FNC
ENT
3.SETTING MODE CONFIGURATION
19
4.CALIBRATION
F340A
Strain gauge sensor
Rated output value （mV/V）
＋
Indicated value
A data sheet will be attached to a strain gauge sensor you buy.
On the data seat, the following values are listed.
Capacity ................................... Load (unit: kg, t, etc.)
Rated Output............................ Voltage (unit: mV/V)
Non-Linearity， Hysterisis，
Input Resistance，Output Resistance，
Zero Balance, etc.
The Capacity and the Rated Output are necessary values for the
equivalent input calibration. Input these two values to F340A.
4. CALIBRATION
"Calibration" refers to an operation whereby matching between the F340A and a strain
gauge sensor is obtained. The F340A uses the two calibration methods as described
below.
◇ Equivalent Input Calibration
This approach uses no actual loads but key entry of the rated output value of the strain
gauge sensor (mV/V) and the rating value (value to be displayed).
This method is simple and employed when actual loads cannot be applied.
For example
Gain will be automatically decided by registering the values indicated as follows:
for load: 2.001mV/V - 100.0kgf
for pressure: 2.002mV/V - 10.00kgf/cm
2
, and
for torque: 2.502mV/V - 15.00kgf•m.
20
◇ Actual Load Calibration
F340A
Strain gauge sensor
Indicated value
Actual
load
Releasing Calibration LOCK
Setting Scale Division
Equivalent Input Calibration
Inhibit Calibration
Calibration Lock
This approach provides calibration by applying an actual load to the strain gauge sensor
and inputting the actual load value. This calibration is without little errors and more
correct.
4.CALIBRATION
4-1. Equivalent Input Calibration Procedure
The equivalent input calibration uses the following procedure :
Release the Calibration LOCK that inhibits calibration.
Set the minimum value of the digital change desired
（omissible if no desired value is present）
Set the rated output vale and zero point of the strain
gauge sensor.
Set the calibration of ON to prevent misoperation.
21
4.CALIBRATION
1)Select setting mode 3.
2)Select calibration lock.
Use and key to set the calibration lock of
OFF（0）． then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
SEL
UP
DOWN
ENT
ESC
Releasing Calibration LOCK
Calibration LOCK
1：ON
0：OFF
・Releasing Calibration LOCK
22
・Setting of Scale Division （Omissible if no change is needed）
1) Select setting mode 3.
2) Set the scale division.
Use and keys to set the scale division,
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
Press twice.
UP
DOWN
SEL
ENT
ESC
Setting of Scale Division
Scale Division（001 to 100）
4.CALIBRATION
* When you set the equivalent input calibration, the change that digit to place a decimal
point is set.
23
4.CALIBRATION
1) Start the equivalent input calibration.
2) Set the rated output value of the sensor.
Use and keys
to set the rated output value,
then use key to validata the setting.
3) Set the rated value.
Use and keys to set the rated value,
then use key to validate the setting. Press key at a blinking
digit to place a decimal point immediately after the digit.
4) Place the sensor without load and set the zero point. Check that the sensor is
unloaded,then press and keys in this order.
If the indicated value following the display CAL2E is
zero, the equivalent input calibration is terminated.
SHIFT
CAL
ENT
UP
DOWN
SEL
ENT
UP
DOWN
SEL
ENT
FNC
ZERO
ENT
Equivalent Input Calibration
Rated Output Value（0.500 to 3.000mV/V）
Rated Value（00000 to 19999）
Example of a sensor having the output
value of 2.010mV/V for rated 100.00kgf（N）
c
・Equivalent Input Calibration
If a calibration error display appears, take a proper action according to the error,
then perform calibration again.
…Span set value is "00000". Set a correct span value.
On completion of calibration, turn on the calibration LOCK.
24
・Calibration LOCK
1) Select setting mode 3.
2) Select calibration lock.
3) Use and key to set the calibration lock of
ON（1）． then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
SEL
UP
DOWN
ENT
ESC
Calibration LOCK
1：ON
0：OFF
CalibrationLOCK
4.CALIBRATION
25
4.CALIBRATION
Releasing Calibration LOCK
Setting of Scale Division
Zero Calibration
Actual Load Calibration
Calibration LOCK
4-2. Actual Load Calibration
The actual load calibration uses the following procedure
Release the calibration LOCK that inhibits calibration.
Set the minimum value of the digital change desired.
（omissible if no desired value is present）.
Set the zero point of the strain gauge sensor.
Set the span(gain) point of the strain gage sensor.
Set the calibration of ON to prevent misoperation.
26
・Releasing Calibration LOCK
1) Select setting mode 3.
2) Select calibration lock.
Use and key to set the calibration lock of
OFF（0）． then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
SEL
UP
DOWN
ENT
ESC
Calibration LOCK
1：ON
0：OFF
Releasing Calibration LOCK
4.CALIBRATION
27
4.CALIBRATION
1) Select setting mode 3.
2) Set the scale division.
Use and keys to set the scale division，
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
Press twice.
UP
DOWN
SEL
ENT
ESC
Setting of Scale Division
Scale Division（001to 100）
1)Check that the sensor is unloaded, then press keys in
this order.
If the indicated value following the display CAL2E is
zero, the zero calibration is terminated.
ENT
and
ZERO
Zero Calibration
・Setting of Scale Division（omissible if no change is needed）
* When you set the actual load calibration, the change that digit to place a decimal point
is set.
・Zero Calibration
28
・Actual Load Calibration
1) Apply an actual load to the sensor and set the actual load value.
Use and keys to set the actual load value，
then key to validate the setting.
To move the decimal point, press key at a blinking digit.
If the indicated value following the display CALSP is
Actual Load, the Actual Load calibration is terminated.
ENT
SEL
UP
DOWN
SEL
ENT
FNC
Actual Load Calibration
Indicated Value of
（00000 to 19999）
Actual Load Value
4.CALIBRATION
If a calibration error display appears, take a proper action according to the error, then
perform calibration again.
…Span set value is "00000".
Set a correct span value.
…Output of the strain gauge sensor does not reach the span adjustment
range.
Confirm whether an actual load is put on the strain gauge sensor.
Calibration may not be performed without load
…Output of the strain gauge sensor is on the minus side.
Check to see if the +SIG and -SIG wiring if the sensor is reversed.
On completion of calibration, turn on the calibration LOCK.
29
4.CALIBRATION
1) Select setting mode 3.
2) Select calibration lock.
3）Use and key to set the calibration lock of
ON（1）． then use key to validate the setting
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
SEL
UP
DOWN
ENT
ESC
Calibration LOCK
1：ON
0：OFF
Calibration LOCK
・Calibration LOCK
30
5. SETTING OF FUNCTIONS
Time
Indicated value
High limit value
Low limit value
HIGH
LOW
OFF
ON
OFF
ON
5-1. High /Low Limit Value
High / Low limit value are functions whereby the high output is turned on when the
indicated value exceeds the high / low output is turned on when it drops below the low
limit.
＜ HIGH/LOW output conditions ＞
HIGH ：Indicated value ＞ High limit value
LOW ：Indicated value ＜ Low limit value
5.SETTING OF FUNCTIONS
31
5.SETTING OF FUNCTIONS
1) Select setting mode 1.
2) Select high limit value.
Use and keys to set the high limit value.
Press key to place a minus sign. press key to validate the
setting.
3) Select low limit value.
Use and key to set the low limit value.
Press key to place a minus sign.
Press key to validate the setting
To return to the indicated value display, press key.
FNC
DOWN
ENT
UP
DOWN
SEL
SHIFT
CAL
ENT
DOWN
ENT
UP
DOWN
SEL
SHIFT
CAL
ENT
ESC
Setting of High/Low Limit Value
High Limit Value（00000 to ± 19999）
Low Limit Value（00000 to ± 19999）
32
5-2. High / Low Limit Comparator Mode
1)Select setting mode 1.
2)Select high / low limit comparator mode.
Use and keys to set the high
/ low Limit Comparator Mode,
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
DOWN
Press three times.
ENT
UP
DOWN
ENT
ESC
High / Low Limit Comparator Mode
High / Low Limit
3：Comparison is made at stable
2：Comparison is always made
1：Comparison is made in the
0：Comparison is always made.
Comparator Mode
status except for near zero.
except for near zero
stabl status.
Except for Mode 0 （Comparison is always made） of the High / Low
Limit Comparator Mode, setting is closely related to Near Zero and
Motion Detect functions. For details, see Near Zero on page 38 and
Motion Detect on page 41.
5.SETTING OF FUNCTIONS
33
5.SETTING OF FUNCTIONS
5-3. Hysteresis
The Hysteresis function provides a range of high/low limit comparator off. Usually the
high limit comparator is turned on when the indicated value is above the high limit value
and turned off when below. If you set a hysteresis range, the comparator is turned off
when the indicated value is below the high limit value by the hysteresis setting. This is
effective in preventing chattering caused when signals are slightly varying （vibrating) .
〈Comparison conditions〉
・High limit
ON conditions ：Indicated value ＞ High limit value
OFF conditions：Indicated value ≦（High limit value － Hysteresis set value）
・Low limit
ON conditions ：Indicated value ＜ Low limit value
OFF conditions：Indicated value ≧（Low limit value ＋ Hysteresis set value）
34
・Hysteresis operation
High limit
Low limit
＋
0
Hysteresis range
Time
High limit relay
HI LED
Low limit relay
LO LED
OK LED
Relay ON
LED ON
Relay OFF
LED OFF
Relay ON
LED ON
Relay ON
LED ON
－
Relay OFF
LED OFF
Relay OFF
LED OFF
Indicated value
value
value
5.SETTING OF FUNCTIONS
35
5.SETTING OF FUNCTIONS
1) Select setting mode 1.
2)
Select hysteresis.
Use and keys to set the hysteresis range，
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
DOWN
Press four times.
ENT
UP
DOWN
SEL
ENT
ESC
Setting of Hysteresis
Hysteresis （0000 to 9999）
Hysteresis setting is the same for high / low limit.
36
5-4. Digital Offset
1) Select setting mode 1.
2) Select digital offset.
Input an digital offset setting value with and keys
and validate it with key. Press key to put minus sign.
To return to the indicated value display, press key.
FNC
DOWN
Press five times.
ENT
UP
DOWN
SEL
ENT
SHIFT
CAL
ESC
Setting of Digital Offset
Digital Offset (00000 to ± 19999)
This function subtracts a set value from the indicated value. If you make digital offset ,
the value which is obtained by subtracting the set value from the indicated value will be
displayed. This is convenient when you cannot obtain zero by unloading the equipment
for some reason or when you want to give offset.
(Indicated value to be displayed) = (Actual indicated value) - (Digital offset setting value)
5.SETTING OF FUNCTIONS
37
5.SETTING OF FUNCTIONS
Near Zero ON/OFF is closely related to Automatic Printing and High
and Low Limit Comparator Mode.
For details, see High and Low Limit Comparator Mode on page 33 and
Automatic Printing on page 46.
1) Select setting mode 1.
2) Select near zero.
Use and keys to set the near zero.
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
DOWN
Press six times.
ENT
UP
DOWN
SEL
ENT
ESC
Setting of Near Zero
Near Zero
（00000 to 19999）
The Near Zero function operates at an absolute value.
5-5. Near Zero
The Near Zero function detects that the indicated value is near zero.
38
5-6. Digital Filter
1) Select setting mode 2.
2) Select digital filter.
Use and keys to set the digtal filter,
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL
DOWN
ENT
UP
DOWN
ENT
ESC
Setting of Digital Filter
5 ： 64 times
4 ： 32 times
3 ： 16 times
2 ： 8 times
1 ： 4 times
0 ： OFF
Digital Filter
This function minimizes instability of the weight value by calculating the average
frequency of the data converted from analog to digital. The frequency of the moving
average selected from OFF(0 or 1) ~ 64 times. A higher frequency will make a more
stable display with slower response.
A lower frequency will have quicker response but more unstable display.
5.SETTING OF FUNCTIONS
39
5.SETTING OF FUNCTIONS
1) Select setting mode 2.
2) Select analog filter.
Use and keys to set the analog filter,
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL
DOWN
Press twice.
ENT
UP
DOWN
ENT
ESC
Setting of Analog Filter
3 ： 3kHz
2 ： 100Hz
1 ： 10Hz
0 ： 4Hz
Analog Filter
5-7. Analog Filter
This is a lowpass filter filtering the strain gage sensors input signal and cutout the noise
element.
Lowpass filter cutout freguency is selectable in the 4/10/100/3k Hz.
40
5-8. Motion Detect
Set
100mSec
Time
Set period
Indicated value
range
Whether the indicated value is stable or not is closely related to
Automatic Printing and High and Low Limit Comparator Mode. For
details, see High and Low Limit Comparator Mode on page 33 and
Automatic Printing on page 46
Setting of parameters for detecting stable measurement is required.
If the difference between the current indicated value and that of 100msec before fall
within the specified range and the status last for a specified time, indicated values are
assumed stable.
5.SETTING OF FUNCTIONS
41
5.SETTING OF FUNCTIONS
1) Select setting mode 2.
2 ) Select motion detect（time）.
Use and keys to set the motion detect（time）
then use key to validate the setting.
3) Select motion detect（range）.
Use and keys to set the motion detect（range）
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL
DOWN
Press three times.
ENT
UP
DOWN
SEL
ENT
UP
DOWN
SEL
ENT
ESC
Setting of Motion Detect
Motion Detect(time)
Motion Detect（range）
（00 to 99division）
（0.0 to 9.9s）
42
5-9. Zero Tracking
1) Select setting mode 2.
2) Select zero tracking（Time）.
Use and keys to set the zero tracking （time），
then use key to validate the setting.
3) Select zero tracking（range）.
Use and keys to set the zero tracking （range），
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL
DOWN
Press five times.
ENT
UP
DOWN
SEL
ENT
DOWN
ENT
UP
DOWN
SEL
ENT
ESC
Setting of Zero Tracking
Zero Tracking（Time）
Zero Tracking（range）
（0.0 to 9.9S）
（00 to 99）
5.SETTING OF FUNCTIONS
The Zero Tracking function automatically tracks and compensates a fine shift of the zero
point due to a factor such as a drift.
43
5.SETTING OF FUNCTIONS
・The Zero Tracking function automatically resets the zero point to zero at a specified
time interval when the zero point move amount is below the specified range.
・The time（tracking delay）is set in units of 0.1 seconds, from 0.1 to 9.9 seconds. The
range （tracking band）is set in units of quarters of the indicated value. （The indicated
value 02 corresponds to 0.5 scales and 12, 3 scales.） If the time is set to 0.0 sec. and
range to 00, the Zero Tracking function does not work.
Boundary of zero track
BAND=COUNT × the minimum digital scale × 2
Indicated Value
DELAY
+COUNT
-COUNT
BAND
＋
0
－
DELAY
From the point when it returned within the range,
counting will be resumed.
The Zero Tracking works from where the indicated value is zero. It does not work when
the indicated value exceeds the tracking band. In this case,specify the zero point using
the Digital Zero or Zero Calibration.
Request
44
5-10. Hold Mode
1) Select setting mode 2.
2)
Select hold mode.
Use and keys to set the hold mode, then use key
to validate the setting.
To return to the indicated value display, press key.
FNC
SEL
DOWN
Press seven times.
ENT
UP
DOWN
ENT
ESC
Setting of Hold Mode
1 ： Peak Hold
0 ： Sample Hold
Hold Mode
The F340A provides the Peak Hold function to hold and display the peak value
（maximum value） of the input signal, and the Sample Hold function to hold and display
an optional point.
5.SETTING OF FUNCTIONS
45
5.SETTING OF FUNCTIONS
Indicated
Near zero
0
Stable
Near zero
ON
ON
ON
ON
OFF
OFF
OFF
Automatic printing
↑
Hold
※ 3 seconds
Time
ON
Hold function …
Indicated value
SI/F
Output signal（HI, LOW）
value
※If the state of Near Zero ON is not keeping for three min
utes, the hold values was not canceled.
5-11. Automatic Printing
The Automatic Printing function automatically prints out indicated values on a
UNIPULSE printer connected to the F340A over the SI/F. Printing is made when
indicates vales are stable. （Parameter for stabilization is set in the Motion Detect
function.） The stabilized indicated value can be held for three seconds （indicated value
hold function）.
・Operation of the indicated value hold function
46
5.SETTING OF FUNCTIONS
Indicated
Near zero
0
Time
Stable
Near zero
ON
ON
ON
ON
OFF
OFF
OFF
Automatic printing
↑
Hold
3 seconds
ON
value
1) Select setting mode 2.
2) Select automatic printing.
Use and keys to set the automatic printing，
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL
DOWN
Press eight times.
ENT
UP
DOWN
ENT
ESC
Setting of Automatic Printing
2 ： Automatic printing ON,
1 ： Automatic printing ON
Automatic printing
0 ： Automatic printing OFF
Indicated value HOLD
47
5.SETTING OF FUNCTIONS
1) Select setting mode 2.
2) Select hold value printing.
Use and keys to set the hold value printing.
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL
DOWN
Press nine times.
ENT
UP
DOWN
ENT
ESC
1 ： Hold value printed when Hold
0 ： No printing
Setting of Hold Value Printing
Hold Value Printing
is canceled
If setting Hold Value Printing when the hold value canceled,
Automatic Printing did not work.
5-12. Hold Value Printing
The Hold Value Printing function automatically prints out the peak value （held value）
on a UNIPULSE printer connected to the F340A over the SI/F.
48
5-13. LOCK
1) Select setting mode 3.
2) Select lock.
Use and key to set the lock，
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
Select
ENT
UP
DOWN
SEL
ENT
ESC
Setting of LOCK
1 ： LOCK
0 ： LOCK
released
Setting Value LOCK
1 ： LOCK
0 ： LOCK
released
Calbration LOCK
Zero key operation
1 ：Invalid
0 ：Val i d
Hold key
1 ：Invalid
0 ：Valid
operation
For setting items locked by using set value LOCK and calibration
value LOCK , see the set value list on page 17.
The Digital Zero function by using the key on the front
panel is not effective when the Setting value LOCK （calibrated
value）is released（nor is it effective from the rear panel DZ）.
On completion of calibration set the calibration value LOCK.
ZERO
5.SETTING OF FUNCTIONS
The Setting value LOCK function inhibits changes to setting to prevent changes to set
values or calibrated values through misoperation.
49
5.SETTING OF FUNCTIONS
1) Select setting mode 3.
2) Select scale division.
Use and key to set the scale division,
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
Press twice.
UP
DOWN
SEL
ENT
ESC
Setting of Scale Division
Scale Division
（001 to 100）
5-14. Scale Division
This function sets the minimum value of the digital change.
50
5-15. Display Frequency
1) Select setting mode 3.
2) Select display frequency.
Use and keys to set the display frequency,
then use key to validate the setting.
To return to the indicated value display, press key.
FNC
SEL SEL
DOWN
ENT
Press three times.
UP
DOWN
ENT
ESC
Setting of Display Count
3 ： 25/sec.
2 ： 13/sec.
Display Frequency
1 ： 6/sec.
0 ： 3/sec.
The Display frequency function is used to select the times the indicated values are
displayed per second. A/D conversion count is fixed to 100 per second.
5.SETTING OF FUNCTIONS
51
5.SETTING OF FUNCTIONS
1) Select setting mode 3.
2) Select excitation voltage.
Set excitation voltage with and keys and validate it
with key.
To return to the indicated value display, press key.
FNC
SEL SEL
ENT
Press four times.
DOWN
UP
DOWN
ENT
ESC
Setting Excitation Voltage
Excitation Voltage
1 ： 10 V
0 ： 2.5V
CAUTION
Use a strain gauge sensor to be connected to the F340A whose
maximum excitation voltage is above the bridge excitation voltage
specified.
If the bridge excitation voltage is greater than the maximum excitation
voltage of the sensor, the sensor may overheat or may be damaged.
5-16. Excitation Voltage
This function selects the bridge excitation voltage to be supplied to the strain gauge
sensor.
52
6 HOLD FUNCTION
LED lighting
Key input
HOLD LED
HOLD
Peak hold start Peak hold reset
Time
Indicated value
Sensor input value
Peak hold section Peak hold release
6-1. Peak Hold
・Peak Hold Operation
6HOLD FUNCTION
53
6HOLD FUNCTION
LED lighting
Hold input
HOLD LED
Time
Indicated value
Sensor input value
Peak hold section Peak hold release
Peak hold start Peak hold reset
54
・Timing Chart
Time
t1
t2
t3
t4
Hold
input
Display and
BCD output
t1 ： MAX 25mS
t2 ： MAX 10mS
t3 ： MAX 25mS
t4 ： MIN 25mS
Indicated value
Sensor input
6HOLD FUNCTION
t1 ： Time from the short-circuiting of the hold input (OFF → ON) to the display of the
peak hold value.
t2 ： Time until the A/D conversion of the analog value.
t3 ： Time from the input of the hold input (ON → OFF) to the reset of the analog peak
hold value.
t4 ： The minimum tracking (resetting) time required for resetting the display of the
held value.
55
6HOLD FUNCTION
Hold section
LED lighting
Key input
HOLD
HOLD LED
Hold section
LED lighting
HOLD LED
Hold input
Indicated value
Sensor input value
Time
Time
Indicated value
Sensor input value
6-2. Sample Hold Operation (Digital Hold)
・Sample Hold Operation
56
・Timing Chart
Hold input
t1
t2
t4
t3
Time
t1 ： MAX 25mS
t2 ： MAX 25mS
t3 ： MAX 25mS
t4 ： MIN 25mS
Display and
BCD output
Indicated value
Sensor input
6HOLD FUNCTION
t1 ： Time from the short-circuiting of the hold input (OFF → ON) to the display of the
hold value.
t2 ： Time from start of the hold to the A/D conversion of the hold value.
t3 ： Time from the input of the hold input (ON → OFF) to the reset of the analog hold.
t4 ： The minimum tracking (resetting) time required for resetting the display of the
held value.
57
7.DIGITAL ZERO FUNCTION
1) Perform digital zero.
2) When the indicated value becomes zero, digital zero is completed.
ZERO
Setting of Digital Zero
t1
Time
OFF
ON
Indicated value
Sensor input
DZ
t1，t2 ： MAX 25mS
t2
Digital zero will not work when the calibration value LOCK is
turned off.
It only works when the calibration value LOCK is turned on.
If you turn off the power, digital zero will be reset.
7. DIGITAL ZERO FUNCTION
This function zeros the indicated value.
Digital Zero by Key Operation
Digital Zero by External Signal Input
The interval while the DZ input (9) and COM (8) on the signal input/output terminal
board at the back are short-circuited, the digital zero function works to zero the indicated
value.
t1 ： Time from the short-circuiting of the DZ input (OFF → ON) to when the indicated
value becomes 0
t2 ： Time from the input of the DZ input (ON → OFF) to when the indicated value
returns to tracking
58
8. BCD DATA OUTPUT
The BCD Data Output Interface is for transferring indication values in BCD (Binary
coded Decimal) from to PC's PLC's or sequences for controlling, processing and
recording data.
The internal and external circuits are opto-isolated.
8-1. Connector Pin Assignment
No. Signal No. Signal
8.BCD DATA OUTPUT
Amphenol Connector （36-Pin）
1
＊
2 Out 1 20
3 Out 2 21
4 Out 4 22 Out Near Zero
5 Out 8 23 Out
6 Out 10 24 Out OVER
7 Out 20 25 Out
8 Out 40 26 Out STROBE
9 Out 80 27 In BCD Data hold
10 Out 100 28 In Logic Switching
11 Out 200 29
12 Out 400 30
13 Out 800 31
14 Out 1000 32
15 Out 2000 33
COM 19
＊
Minus（polarity）
P. C （stable）
COM
16 Out 4000 34
17 Out 8000 35
18 Out 10000 36
Compatible connector is DDK57-30360 or equivalent.
59
8.BCD DATA OUTPUT
F340A
Inside
Vcc
+5V
COM
Vext
Vceo=30V(max)
Ic =50mA (max)
● Internal transistor status
Output data Negative Positive
0OFFON
1ONOFF
● Output pin level
Output data Negative Positive
0
ＨＬ
1
ＬＨ
Through logic switching （pin 28）
outside
8-2. Logic Switching
The logic Switching function is used to switch between the signal output logics, positive
logic and negative logic. Pin 28 is used for this purpose.
When COM and pin 28 are left open, the negative logic is used. When COM and pin 28
are short-circuited, the positive logic is used.
8-3. Equivalent Circuit
・Output
The signal output circuit employs the TTL open collector output
60
・Input
Vcc
F340A
Inside
Ic=Approx. 6mA
COM
Switch
Transistor
+5V
TTL open collector output
Open OFF
Short ON
Outside
CAUTION
・Avoid applying external voltages to the signal input circuit.
・Use external elements which withstands Ic=10mA or above
・Leakage current from external element must be 30μA or below.
(ON when IN is ’H)
25msec. or more
0
1
BCD data
P. C
8.BCD DATA OUTPUT
8-4. Signal Timing
・P. C
P.C goes on with the BCD data when measurement is stable. Perform data read
approximately 25msec. after the trailing edge of the P.C
・OVER
Output when LOAD or -LOAD, and OFL1 or OFL2 are specified.
61
8.BCD DATA OUTPUT
BCD data
OVER
strobe range
STROBE
0
1
1) Select setting mode 4.
2) Set the update rate of BCD parallel data output.
FNC
SEL
DOWN
ENT
BCD Data Update Rate Selection
6 ： 1 times/sec. 〃 Approx. 500msec
5
：
2 times/sec. 〃 250msec
4
：
5 times/sec. 〃 100msec
3 ： 10 times/sec. 〃 50msec
2
：
20 times/sec. 〃 25msec
1 ： 50 times/sec. 〃 10msec
0 ： 100 times/sec. STROBE Range 5msec
BCD Update Rate
・STROBE
BCD data is updated on a per A/D conversion and the strobe pulse synchronous with the
BCD data is output.Use the rising edge of the pulse to read data
8-5. BCD Data Update Rate Selection
62
8.BCD DATA OUTPUT
Normaly，BCD data update synchronous the A/D conversion (100
times/sec).
When the BCD input equipment is low ability and can not read out
the high rate of 100 times/sec.，set the BCD data update rate is low.
63
9.RS-232C INTERFACE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
N
AC IN
F. G.
SER. No.
MADE IN JAPAN
9. RS-232C INTERFACE
RS-232C interface is used to read out the indicated value and the state of F340A and to
write set values into F340A. It is convenient to connect F340A with a computer, a
process controller and a sequencer, etc. to make processing such as control, aggregation,
recording and so on.
9-1. Communication Specifications
9-1-1. Standard
Signal level ：Based on RS-232C
Transmitting distance ：Approx.15m
Transmitting method ：Asynchronous，Full duplex
Transmitting speed ：1200，2400，4800，or 9600bps selectable
Bit configuration ：Start bit 1
64
Code ：ASCII
Character length 7 or 8 bit selectable
Stop bit 1or 2 bit Selectable
Parity none,odd or even selectable
9-1-2. Connector Pin Assignment
1
2
3
4
5
8
6
20
7
FG
TｘD
RｘD
RTS
CTS
(CD)
(DSR)
DTR
SG
1
2
3
4
5
8
6
20
7
FG
TｘD
RｘD
RTS
CTS
CD
DSR
DTR
SG
F340A
PC etc…
cross cable
Adaptable plug :25-pin D-sub connector
9.RS-232C INTERFACE
1
2 out TxD 15
3in RxD 16
4 out RTS 17
5in CTS 18
619
7
821
922
10 23
11 24
12 25
13
9-1-3. About Cables
＊
＊
FG 14
SG 20 out DTR
※ The avobe diagram is for connecting a personal computer as a DTE(Data Terminal
Equipment)device.
If it is a DCE (Data Circuit-terminating Equipment)device,connect pin to pin (DTR
to DTR, DSR to DSR etc.)
※ Cables should be prepared after checking connector type and pin assignments of the
connected device.
65
9.RS-232C INTERFACE
1) Select setting mode 4.
2) Select RS-232C.
3) Input RS-232C with and keys and validate
it with key.
To return to the indicated value display, press key.
FNC
SEL
Press three times.
DOWN
ENT
Press twice.
UP
DOWN
SEL
ENT
ESC
Setting of RS-232C
Communication
2 ： Communication Mode 2
(transmits when printed)
1 ： Communication Mode 1
(transmits continuously)
0 ： Communication Mode 0
(performs communication
Stop Bit
1 ： 2bit
0 ： 1bit
Parity Bit
2 ： Even number
1 ： Odd number
0 ： None
Character Length
1 ： 8bit
0 ： 7bit
Baud Rate
3 ： 9600bps
2 ： 4800bps
1 ： 2400bps
0 ： 1200bps
Mode
by a command)
9-2. Setting RS-232C Interface
This will set the RS-232C communication conditions of F340A.
66
9-3. Communication Mode
Host
F340A
RA CR
RA CRLF
＋
1 0 0 0 0 .
Host
F340A
RD CR
RD CRLF0 0 0 0 0 0 0
1:ON
0:OFF
1:ON
0:OFF
Near zero output signal 1:ON
HI output signal 0:OFF
HI 1:ON
LO output signal 0:OFF
L O 1:ON
output signal 0:OFF
OK 1:ON
output signal 0:OFF
※ Undefined
Hold
Stable
1. Communication Mode 0
This mode performs communication by a command from the host computer.
In this mode, you can read out the indicated value, status, set values and write in set
values.
2. Communication Mode 1
This mode continuously transmits the indicated values and the status.
3. Communication Mode 2
This mode transmits the indicated values when they are printed.
9.RS-232C INTERFACE
9-4. Communication Format
1. Communication Mode 0
・Reading Out the Indicated Value (the sign, indicated value with 5 digits and decimal point)
・Reading Out the Status (seven digits)
67
9.RS-232C INTERFACE
0
W
LF1
CR LF2 0
W
CR LF0 0 0 0 3 0 0
W
CR
CR LF0 4 0
W
CR LF 5 0
W
CR LF 6 0
W
0
CR LF 1 1
W
0 0 0 0 0
CR LF 2 1
W
0 0 0 0 0
CR LF 3 1
W
0 0 0 0
CR LF 4 1
W
0 0 0 0
CR LF 5 1
W
0 0 0 0
CR LF 6 1
W
0 0 0 0
CR LF 7 1
W
0 0 0 0
0
CR LF 9 1
W
0 0 0 0
0
CR LF 8 1
W
0 0 0 0
0
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
（Set value
0 ：In signed setting, this will be recognized
－：This will be recognized as minus.
Sign bit
Max 5digits
※
Do not put other than zero into a place which is set zero.
0
Set value No.
as plus.
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
LOCK）
・Write in of the set value
High Limit
Low Limit
High/Low Limit
Comparison Mode
Hysteresis
Digital Offset
Near Zero
Digital Filter
Analog Filter
MD（stable time）
MD（stable band）
Zero Tracking（time）
Zero Tracking（band）
Hold Mode
Automatic Printing
Hold Value Printing
68
LOCK
2
W
LF1
CR LF2 2
W
CR LF0 0 0 0 3 0 2
W
CR
CR LF 4 2
W
CR LF 1 3
W
CR LF 2 3
W
0
CR LF 3 3
W
CR LF 4 3
W
（calibration
Sign bit
Max 5digits
※ Do not put other than zero into a place which is set zero.
0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
Set value No.
0 ：In signed setting, this will be recognized
－：This will be recognized as minus.
as plus.
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
（
calibration
LOCK）
It is impossible to write Ｗ２４ and Ｗ３４.
Host
F340A
Ｗ
Ｗ
CR
Set value No. The same format as write-in
Set value No.
CR LF
of set values.
Scale Division
Display Frequency
Excitation Voltage
BCD Data Update Rate
RS-232C
D/A Zero Setting
9.RS-232C INTERFACE
・Reading out Set Values
D/A Full Scale Setting
69
9.RS-232C INTERFACE
CR
CR
CR
CR
CR
Ｃ
Ｃ
Ｃ
Ｃ
Ｃ
Ｅ
Ｆ
Ｇ
Ｈ
Ｉ
(This is effective only when the calibration
(This will issue print a command
value LOCK is "1.")
(This is effective only when the calibration
value LOCK is "1.")
onto SIF.)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
G S ， 1 ， 2 ， 3 ， 4 ， ±
****
CR LF
HEADER
Five digits of the indicated
Sign
＋ or －
value and decimal point
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
G S ， 1 ， 2 ， 3 ， 4 ， ±
****
CR LF
HEADER
Five digits of the indicated
Sign
＋ or －
value and decimal point
・Command (host → F340A)
Hold
Hold Reset
Digital Zero
Digital Zero Reset
Print Instruction
2. Communication Mode 1
This mode will continuously transmit the indicated values.
3. Communication Mode 2
This mode will transmit when the indicated value is printed.
70
＊ 1
O........ Over Load（LOAD，OFL）
S ........ Stable
M....... Not Stable
H........ Hold
＊ 1 Priority H ＞ O ＞（Ｓ or Ｍ）
＊ 2
A........Zero Tracking OFF
T ........Zero Tracking ON
9.RS-232C INTERFACE
＊ 3
H........High Limit ON
L ........Low Limit ON
G........High / Low Limit OFF
N........High / Low Limit ON
F ........Compare OFF
＊ 3 Priority N ＞（H or L ） F ＞ G
＊ 4
N........Zero Near OFF
Z ........Zero Near ON
71
10.D/A CONVERTER
Terminals for obtaining voltage
signal.
“+” is for signal, and “-” is for
ground.
-10 to +10V can be obtained.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
N
AC IN
F. G.
SER. No.
MADE IN JAPAN
V OUT
I
OUT
10. D/A CONVERTER
The D/A converter analog output can be selected from the voltage output and the current
output.
Please depending on the request at the time of order.
10-1. Voltage Output
(Depending on the request at the time of order.)
This converter is used to obtain an analog output which is linked with the indicated value
of the F340A.
The range of the analog output is from -10 to +10V.
An analog output from -10V to +10V can be obtained with respect to any digital values
set by the D/A zero setting and the D/A full scale setting functions.
The output circuit and the main circuit are isolated.
72
Voltage output :-10 to +10V (load resistance; 2kΩ or more)
D/A conversion speed :100 times/sec.
Resolution :1/6000
Over range :-11.0 to +11.0V
10-1-1. Obtaining Voltage Output Signal
＋
－
＋
－
External equipment
Load resistance: 2kΩ or more
SIG
GND
← Inside Outside →
F340A
CAUTION
• Do not apply external voltages. Breakage will result.
• Do not short-circuit the voltage output. Doing so will cause a failure.
Also, connecting a capacity load may cause oscillation.
Vol tage
（V）
10
-10
Indicated value
0
Resolution 1/6000
D/A full scale set valueD/A zero set value
Use + and - terminals of F340A connecting to them an external equipment (with load
resistance of 2kΩ or more).
10.D/A CONVERTER
10-1-2. Setting of D/A Zero and Gain
With the D/A converter of the F340A, an analog output is obtained by setting the
indicated value to output 0V (D/A zero set value) and the indicated value to output 10V
(D/A full scale set value). Respective set values are inputted by the D/A zero and full
scale setting functions.
73
10.D/A CONVERTER
Vol tage
（V）
10
-10
Indicated value
D/A full scale set valueD/A zero set value
0
Resolution 1/6000
100 2100-1900
Example of Setting
In the case where:
D/A output mode ................0 (linked with indicated value)
D/A zero setting .................. 00100
D/A full scale setting .......... 02100
Full scale → -1900 -10.00
Full scale →
10-1-3. About D/A Resolution
The resolution of the D/A converter is 1/6000 with respect to 0 to ±10V.
In other words, the minimum unit of voltage is:
(+10 to (-10V)) × 1/6000 = 3.33mV.
Also, the minimum unit of indicated value is:
(D/A full scale set value - D/A zero set value) × 2 × 1/6000.
Indicated value Voltage (V)
Zero → 100 0.00
1100 5.00
1600 7.50
2100 10.0
2120 10.1
74
10-2. Current Output
Terminals for obtaining current
signal.
“+” is for signal, and “-” is for
ground.
4 to 20mA can be obtained.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
N
AC IN
F. G.
SER. No.
MADE IN JAPAN
V OUT
I
OUT
(Depending on the request at the time of order.)
This converter is used to obtain an analog output which is linked with the indicated value
of the F340A.
The range of the analog output is from 4 to 20mA.
An analog output from 4mA to 20mA can be obtained with respect to any digital values
set by the D/A zero setting and the D/A full scale setting functions.
The output circuit and the main circuit are isolated.
10.D/A CONVERTER
Current output :4 to 20mA (load resistance; 350Ω or less)
D/A conversion speed :100 times/sec.
Resolution :1/3000
Over range :3.2 to 20.8mA
75
10.D/A CONVERTER
＋
－
External equipment
Load resistance: 350Ω or less
SIG
GND
← Inside Outside →
＋
－
F340A
CAUTION
Do not apply external currents. Breakage will result.
Also, connecting a capacity load may cause oscillation.
Current
（mA）
20
4
D/A zero set value
Indicated value
D/A full scale set value
Resolution 1/3000
10-2-1. Obtaining Current Output Signal
Use + and - terminals of F340A connecting to them an external equipment (with load
resistance of 350Ω or less).
10-2-2. Setting of D/A Zero and Gain
With the D/A converter of the F340A, an analog output is obtained by setting the
indicated value to output 4mA (D/A zero set value) and the indicated value to output
20mA (D/A full scale set value). Respective set values are inputted by the D/A zero and
full scale setting functions.
76
Example of setting
Current
（mA）
20
4
Resolution 1/3000
Indicated value
500 2500
D/A full scale set valueD/A zero set value
In the case where:
D/A output mode ................0 (linked with indicated value)
D/A zero setting .................. 00500
D/A full scale setting ..........02500
10.D/A CONVERTER
Full scale →
10-2-3. About D/A Resolution
The resolution of the D/A converter is 1/3000 with respect to 4 to 20mA.
In other words, the minimum unit of voltage is:
(20 - 4mA) × 1/3000 = 5.33µA.
Also, the minimum unit of indicated value is:
(D/A full scale set value - D/A zero set value) × 1/3000.
Zero →
Net weight Current (mA)
480 3.84
500 4.00
1000 8.00
1500 12.00
2500 20.00
2520 20.16
77
10.D/A CONVERTER
1)Select setting mode 4.
2)Set D/A zero.
Set D/A zero with and keys. Press
key to put minus sign. When you have made setting, validate it
with key.
3)Set D/A full scale.
Set D/A full scale with and keys. Press
key to put minus sign. When you have made setting, validate it
with key.
FNC
SEL
Press three times.
DOWN
ENT
Press three times.
UP
DOWN
SEL
SHIFT
CAL
ENT
DOWN
ENT
Press one time.
UP
DOWN
SEL
SHIFT
CAL
ENT
Setting D/A Zero Full Scale
D/A Zero Value (00000 to ± 19999)
10-3. Setting D/A Zero Full Scale
This will set the D/A zero full scale of F340A.
78
10-4. About D/A Output Error
This is an error which is output only when D/A option is provided.
D/A output is less than the range of output.
For current output: about 0mA or less
For voltage output: about -12.5V or less
The D/A output exceeds the range of the output.
10.D/A CONVERTER
For current output: about 24mA or more
For voltage output: about 12.5V or more
79
11.DC POWER SOURCE
Red
Black
ＤＣＩＮ
＋
－
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
DC IN
F. G.
SER. No.
MADE IN JAPAN
CAUTION
Be aware that the voltage drops depending on the wire thickness and length.
Also, never input an AC power source. Doing so will cause a failure.
Use a source power (or battery) of 3A DC or more.
Request
11. DC POWER SOURCE
By specifying at the time of shipment, F340A can be used with DC power supply.
Connect the positive (+) side of the power source to the red screw side of the terminal
block on the back of the F340A, and its negative (-) side to the black screw side.
Input voltage range ( voltage between terminals of the F340A)
DC12 ～ 24V（± 15%）
Power consumption
80
15W max
12.OVERSCALE/ERROR DISPLAYS
Minus overflow of the A/D converter （under -3.2mV/V between ± SIG）
Plus overflow of the A/D converter （over 3.2mV/V between ± SIG）
Indicated value overflowed （indicated value<-1999）
Indicated value overflowed （indicated value>1999）
Span set value is "00000"
Output of the strain gauge sensor does not reach the span
Output of the strain gauge sensor is on the minus（negative）side.
adjustment range.
12. OVERSCALE/ERROR DISPLAYS
12-1. Overscale Display
12-2. Calibration Error Display
81
13.SELF-CHECK FUNCTION AND INITIALIZATION
1）Turn off the power to the F340A.
2）Turn on the power with key held down.
ESC
Setting Method
13. SELF-CHECK FUNCTION AND INITIALIZATION
13-1. Self-Check
The F340A incorporates the Self-check Function to detect errors in the internal circuits
and in programs and the Visual-check Function to visually check the indicator.
The self-check is completed in 30 seconds. The display " " should appear, then
the indicate value should follow.This ensures that the F340A is in normal operation.
82
Self-check （Visual-Check Sequence）
13.SELF-CHECK FUNCTION AND INITIALIZATION
83
13.SELF-CHECK FUNCTION AND INITIALIZATION
1）Turn off the power to the F340A.
2）Turn on the power with and keys held down．
ESC
ENT
Setting Method
13-2. Initialization
The Initialization is an operation to reset the memory to the factory setting. This
operation resets all set values except calibrated values （obtained through zero calibration
and span calibration） to the factory setting
The initialization follows the self-check.
84
Initialization Sequence
13.SELF-CHECK FUNCTION AND INITIALIZATION
85
13.SELF-CHECK FUNCTION AND INITIALIZATION
＋ EXC
－ EXC
＋ SIG
－ SIG
Low-pass
Fillter
× 100
Excitation
Referrence
A/D
Buffer
F.G
FRAME
Serial
Port
Parallel
Port
Port
Port
Serial
Port
RAM
4Kbyte
MPU
16bit
Flash
ROM
128K
Watch
Dog
NOV.RAM
1024bit
Display
Key Input
HOLD
DZ
2Line
2Line
Parallel
SI/F
D/A
RS-232C
BCD
HI
LO
SIF
CPU
+12V +12V -12V +5V
VOL OUT
GND
+5V
VCC
Isolation
SI/F 用
FRAME
Power Supply Unit
LED
Conversion
Vo l t a g e
Input
Output
Voltage
L
N
AC IN
F.G
13-3. F340A Block Diagram
86
14. DIMENSIONS
12
（Front）（Side）
（Real）
Unit：mm
96
9691
91
92
+1
-
0
92
+1
- 0
Panel cut out dimensions
12213
92
- 0
92
DIGITAL
INDICATOR
F340A
H I OK LOW PEAK HOLD
F340A
DIGITAL
INDICATOR
HOLD
ZERO
ESC
DOWN
SEL
ENT
UP
FNC
SHIFT
CAL
GAIN
OPTION
BCO
232
DAC
B.V
10
V
2.5V
DIGITAL
INDICATOR
F340A
100 - 240V ~
50 - 60Hz
15W
MADE IN JAPAN
SI/F
HI
LO
HOLD
DZ
VOL OUT
G
+EXC
-SIG
-EXC
+SIG
F.G
1
2
3
4
5
6
7
8
9
10
11
13
14
15
4
-
R
3
以
下
4
-
R
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
N
AC IN
F.G.
SER. No.
MADE IN JAPAN
2.52.5
2.5 2.5
14.DIMENSIONS
87
15.SPECIFICATIONS
15. SPECIFICATIONS
15-1. Analog Section
Bride Voltage DC 10V ± 10％
Signal input range － 3.0 to +3.0mV/V
Equivalent input calibration range +0.5 ～ +3.0mV/V
Equivalent input calibration error ＜ 0.1％FS（0.5mV/V input）
DC 2.5V ± 10％
Output current of ｍax 30mA
Changable by setting key Pad
Zero adjustment range 0 ～± 2.0mV/V
Gain adjustment range +0.5 ～ +3.0mV/V
Analog input signal sensitivity 1μV/count
Accuracy Non-linearity：＜ 0.02%FS（of 3mV/V input）
Zero drift ：＜ 0.5μV/ ℃
Gain drift ：＜ 25ppm/ ℃
A/D converter 100 times /sec. Resolution：16 bits （binary）
Analog filter 4Hz，10Hz，100Hz（Initial），3ｋHz
Changable by setting key pad
Peak hold function （high-speed analog hold system）
Operation response speed：Approx. 1kHz
（Sin wave : 3mV/V input，
Analog Filter.3kHz）
Accuracy： ＜ 0.1%FS
Reset time：＜ 50μS
88
15-2. Indicator Section
Indicator Numeric display （5 digits）, 15mm in height, red LED
Items Status HI，OK，LOW，PEAK，HOLD
15-3. Setting Section
15.SPECIFICATIONS
Numeric 5digits ±
Indicatid value － 19999 to 19999
,
Decimal point Selectable (0
Red LED 5
Count 3，6，13，25times/sec. Selectable
0.0 , 0.00 , 0.000）
Items Calibration：Zero/Span calibration （actual load calibration,
setting，D/A converter fullscael setting.
15-4. External Signals
equivalent input calibration）
High limit value，Low limit value，High/Low limit comparison mode，
Hysteresis, Digital offset, Near zero，Digital filter, Analogfilter，
Motion detect, Zero tracking, Hold mode，Automatic printing，
Hold value printing，LOCK，Scale division，Display frequency,
Excitation Voltage，BCD data update rate，RS-232C，D/A converter
High limit relay，Low limit relay
AC spec. : Rating is 250V AC and 0.5A.
DC spec. : Rating is 30V DC and 0.5A.
Analog monitor output ，Hold signal input，Digital zero signal input.
15-5. Interface
SI/F output
89
15.SPECIFICATIONS
＋ 1
－ 0
15-6. Option
BCD Parallel data output （BCO）
RS-232C Interface （232）
D/A Converter (Please specify voltage and current output when making your order)
15-7. General Specifications
Power voltage - AC spec: 100V to 240V AC（＋ 10% － 15%）
（DAC）
[Free power supply 50Hz/60Hz]
- DC spec: 12V to 24V DC ( ± 15%)
(Depending on the request at the time of order)
Power consumption - AC spec: 15W max.
- DC spec: 15W max.
Rush current (Typ) 20A, 2.5 msec.: 100V AC mean load state
(ordinary temperature, at cold-start time)
40A, 2.5 msec.: 200V AC mean load state
(ordinary temperature, at cold-start time)
Ambient conditions Temperature：Operation － 10 to ＋ 40 ℃
Storage － 40 to ＋ 80 ℃
Humidity：＜ 85％RH（non-condensation）
Dimensions 96W × 96H × 135D（mm）（excluding protrusions）
Panelcutout dimension 92 × 92 （mm）
Weight Approx.0.9kg
90
15-8. Accessories
About the power cord
・The power cord attached to this product as standard equipment can be used
in the AC100V power supply in Japan. (Official ratings voltage AC125V)
Please use the power cord authorized in the country when you use this
product outside Japan.
AC spec
・AC power cord. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
・Mini screwdriver for terminal board connection . . . 1
・Ferrite core. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
・3P － 2P conversion adapter . . . . . . . . . . . . . . . . . . 1
・BCD Output connector . . . . . . . . . . . . . . . . . . . . . . 1 (when BCD option is supplied)
・F340A operational manual. . . . . . . . . . . . . . . . . . . . 1
15.SPECIFICATIONS
DC spec
・Mini screwdriver for terminal board connection . . . 1
・Ferrite core. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
・BCD Output connector . . . . . . . . . . . . . . . . . . . . . . 1（when BCD option is supplied）
・F340A operational manual. . . . . . . . . . . . . . . . . . . . 1
91
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