AD-4408C
Weighing Indicator
INSTRUCTION MANUAL
1WMPD4001849A
WARNING DEFINITIONS
The warnings described in this manual have the following meanings:
A potentially hazardous situation which, if not avoided, could result in
death or serious injury.
A potentially hazardous situation which, if not avoided, may result in
minor or moderate injury or damage to the instrument.
This symbol indicates caution against electrical shock. Do not touch
the part where the symbol is placed.
This symbol indicates the ground terminal.
This symbol indicates that an operation is prohibited.
NOTE
Information or cautions to use the device correctly.
© 2012 A&D Company Ltd. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, or translated into any
language in any form by any means without the written permission of A&D Company Ltd.
The contents of this manual and the specifications of the instrument covered by this manual are
subject to change for improvement without notice.
Contents
1.
Safety Precautions .......................................................................................................3
2.
Introduction...................................................................................................................4
3.
Specifications ...............................................................................................................5
3.1. Analog Section ....................................................................................................5
3.2. Digital Section .....................................................................................................5
3.3. General ...............................................................................................................6
4.
Description of Each Part ...............................................................................................8
4.1. Front Panel .........................................................................................................8
4.2. Rear Panel ........................................................................................................10
5.
Installation ..................................................................................................................12
5.1. Precautions .......................................................................................................12
5.2. Load Cell Cable Type........................................................................................13
5.3. Shield Connection .............................................................................................13
5.4. Load Cell Connection........................................................................................14
5.5. Checking the Load Cell Connection ..................................................................15
6.
Operation....................................................................................................................16
6.1. General Function...............................................................................................16
6.2. Mode Map .........................................................................................................19
7.
Calibration ..................................................................................................................20
7.1. General Description ..........................................................................................20
7.2. Calibration With an Actual Load (Cal5et).........................................................21
7.3. Calibration-Related Functions (Calf)................................................................23
7.4. Calibration Errors ..............................................................................................29
7.5. Load Cell Output Adjustment ............................................................................30
8.
General Functions ......................................................................................................31
8.1. Setting Procedure .............................................................................................31
8.2. Adjusting the Digital Filter .................................................................................32
8.2. Basic Functions (fncf) .....................................................................................33
8.3. Standard Serial Output (Cl f) ..........................................................................34
8.4. CC-Link (CC f)..................................................................................................34
9.
Interface......................................................................................................................35
9.1. Standard Serial Output......................................................................................35
9.2. CC-Link .............................................................................................................37
10. Maintenance ...............................................................................................................50
10.1. Error Messages...............................................................................................50
10.2. Check Mode ....................................................................................................50
10.3. Initialization Mode ...........................................................................................54
10.4. Checking the Load Cell Connection Using the Digital Multimeter ...................56
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AD-4408C Weighing Indicator
11. Setting List..................................................................................................................58
11.1. Basic Functions...............................................................................................58
11.2. Standard Serial Output....................................................................................59
11.3. CC-Link ...........................................................................................................59
11.4. Calibration-Related Functions .........................................................................60
12. External Dimensions...................................................................................................62
AD-4408C Weighing Indicator
Page 2
1. Safety Precautions
For safe and correct usage, read the following precautions carefully before using the
indicator.
Grounding
Earth ground the indicator by connecting the ground terminal located on the rear panel to
the earth, to prevent a fire, electrical shock or indicator malfunction.
Do not share the ground line with other electrical power equipment.
Appropriate power cable
Use a power cable appropriate to the supply voltage and current used. Using an
inappropriate cable may cause electrical leakage or a fire.
Connect the power cable to the terminals firmly using compression lugs.
Fuse replacement
A fuse is provided to protect against a fire hazard.
The indicator is equipped with various protection circuits and the fuse rarely burns out
under normal operations.
If the fuse burns out, the internal circuits may have been damaged by surges. Do not try to
replace the fuse. Contact the nearest A&D dealer.
Avoid water and moisture
The indicator is not water-resistant.
Securing the front panel to the control panel using the accessory panel mount packing will
provide the indicator the IP-65 protection.
Avoid an environment with flammable gases.
Do not use the indicator in places where flammable gases are present.
Indicator overheat
To prevent the indicator from overheating, allow appropriate clearance between the
peripheral devices.
If the ambient temperature exceeds the specified operating temperature, use a fan to cool
the environment.
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AD-4408C Weighing Indicator
2. Introduction
The AD-4408C is a weighing indicator that amplifies signals from a load cell,
converts it to digital data and displays it as a mass value.
The accessory panel mount packing will provide the indicator the IP-65 protection.
This indicator has the following performance:
Input sensitivity: ......................... 0.15 μV /d
Display resolution: ..................... 999,999 d max.
Sampling rate:............................ 100 times/second
Input voltage range: ................... -35 mV to +35 mV (-7 mV/V to +7 mV/V)
Digital span mode:
Keying in the load cell output voltage (mV/V) allows calibration to be performed
without an actual load.
CC-Link interface:
A CC-Link interface, provided as standard equipment, allows construction of a
weighing system easily on a CC-Link network.
NOTE: The AD-4408C CC-Link is a remote device station.
By switching the number of occupied stations (for example 1, 2 or 4), up to
42 indicators can be connected to one master device when only AD-4408Cs
are used.
The unit, d indicates a minimum division.
AD-4408C Weighing Indicator
Page 4
3. Specifications
3.1.
Analog Section
Input sensitivity
Input voltage range
Zero adjustment range
Load cell excitation voltage
Load cell drive capacity
Temperature Zero
coefficient Span
Non-Linearity
A/D conversion method
A/D resolution count
Display resolution
Sampling rate
3.2.
0.15 μV/d or greater
-35 mV to +35 mV (-7 mV/V to +7 mV/V)
-35 mV to +35 mV (-7 mV/V to +7 mV/V)
5VDC 5%, 120 mA with remote sensing capability
Maximum 8 x 350 Ω load cells
0.02 μV /°C typ., 0.1 μV /°C max.
3ppm /°C typ., 15ppm /°C max.
0.005 % of full scale
Delta-sigma method
Approximately 16,000,000 counts
999,999 d max.
100 times/second
Digital Section
Display element
Measurement display
Status indicators
Key switches
• Measurement display: 6-digit 7-segment green LED
• Character height: 14.6 mm
• Polarity display: 1 green LED
• Status indicator: 6 red LEDs
• Switches between NET and GROSS
• Selectable decimal places (101, 102, 103, 104, 105)
• Overflow display
All the digits turn OFF. (When the polarity is negative, the
minus sign appears at the highest-order digit.)
ZERO, STABLE, GROSS, NET, HOLD,
ZERO, TARE, NET/GROSS, F, ON/OFF, ENTER, CAL
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AD-4408C Weighing Indicator
3.3.
General
3.3.1. Interface
Standard serial output
CC-Link interface
Output for communication with A&D peripheral devices (20
mA current loop)
CC-Link ver.1.10 remote device station
3.3.2. Measuring functions
Zero adjustment
Zero tracking
Tare
Stability detection
Digital filter
AD-4408C Weighing Indicator
• Sets the gross weight to zero by pressing the ZERO key or
a command from the CC-Link master station.
• Selection of disable or enable for the operation when
unstable.
• The zero value is battery backed up.
• Zero adjustable range
Can be set optionally in the range of 1 to 100% of the
weighing capacity.
• Tracks the weight drift around the zero point to maintain
zero.
• Zero tracking time
0.0 to 5.0 seconds (Can be set optionally within the range.)
• Zero tracking band
0.0 to 9.9 d (Can be set optionally within the range.)
• Sets the net weight to zero by pressing the TARE key or a
command from the CC-Link master station.
• Selection of disable or enable for the operation when
unstable or negative.
• The tare weight is battery backed up.
• Tare range: Gross weight ≤ Weighing capacity
• Turns ON the stabilization indicator when the variables of
the weight values per sampling are within the set band in
the set time.
• Stability can be confirmed using the CC-Link.
• Stability detection time
0.0 to 9.9 seconds (Can be set optionally within the range.)
• Stability detection band
0 to 9 d (Can be set optionally within the range.)
Cutoff frequency range: 0.07 to 11 Hz
Page 6
3.3.3. Other
Power source
Power consumption
Operating temperature
Operating humidity
Installation method
Mass
• Zero value and tare weight
Memory backup by lithium battery. (Approx. 10 years)
• Calibration data and function data
Written into the EEPROM
100 VAC to 240 VAC, +10%, -15%, (50/60 Hz)
Approximately 10 VA
-10°C to +40°C
85% R.H. or less (no condensation)
Panel mount
Approximately 800 g
3.3.4. Accessories
Item
CC-Link connector
Connector operation lever
Weighing capacity plate
Unit label
Panel mount packing
Terminal block cover
Quantity
1
1
1
1
1
1
Data backup
Model name
1TM-721-105/037A
1TM-231-131
108-4023453
108-4023456
106-4004213
107-4005384
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AD-4408C Weighing Indicator
4. Description of Each Part
4.1.
Front Panel
Fig.1 Front panel
Displays
No.
Name
1 Main display
2 ZERO
3
STABLE
4
5
GROSS
NET
6
HOLD
7
8
UNIT
9
Capacity plate
10 CAL
Description
Displays the weight value, setting values, error messages, etc.
Turns ON when the weight value is in the center of zero.
• Turns ON when the weight value is stable.
• The stability conditions can be changed in the calibration-related
functions.
Turns ON when the displayed value is a gross weight.
Turns ON when the displayed value is a net weight.
• Turns ON when the weight value is being held.
• Two hold modes can be selected in the general functions, either
normal hold or peak hold.
The function for this indicator can be selected in the general functions,
depending on the purpose.
• Place a unit label.
• A unit used for weighing is set in the calibration-related functions.
Place a weighing capacity plate.
• The key to enter the calibration mode.
• The key is concealed by a sealable cover.
To avoid unintentional operations, keep the cover attached
except when entering the calibration mode.
AD-4408C Weighing Indicator
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Key switches
No.
Name
ON/OFF
ESC
11
12
ENTER
Net/B/G
NET GROSS
15
TARE
16
ZERO
17 Seal
• The key to proceed to the selected mode.
• Confirms the setting value and stores the data when pressed
after a setting is changed.
• The function for this key can be selected in the general
functions, from the list below:
None
Manual print command
Hold
Alternate switch
Momentary switch
Clear the tare weight
Clear the zero value
• The key decreases the value of the blinking digit by one when
the numerical values are being entered.
13
14
Description
• The key to turn the indicator ON (Weighing mode) and OFF (OFF
mode).
• To turn the indicator OFF (OFF mode), press and hold the key
for three seconds or more.
• When OFF, all of the displays and external output/input devices
are turned OFF, but a decimal point located at the right side of
the main display remains ON.
• The key functions as an ESC key when the numerical values
are being entered.
• The key to switch between the gross weight and the net weight.
• The key increases the value of the blinking digit by one when
the numerical values are being entered.
• The key to perform tare.
• The tare conditions are set in the calibration-related functions.
• The key shifts the position of the blinking digit to the right when
the numerical values are being entered.
• In the OFF mode, pressing the ON/OFF key while holding down
the TARE key will clear the zero value and the tare weight.
• The key to zero the current display.
• The zero conditions are set in the calibration-related functions.
• The key shifts the position of the blinking digit to the left when
the numerical values are being entered.
• Can be sealed using a wire seal.
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AD-4408C Weighing Indicator
4.2.
Rear Panel
2
3
4
1
Fig.2 Rear panel
No.
1
2
3
4
Name
Terminal block
CC-Link connector
CC-Link status LEDs
Testing terminal
1 Terminal block
Terminal No.
1
EXC+
2
SEN+
3
SEN4
EXC5
SIG+
6
SIG7
SHLD
8
C.L.
9
C.L.
10
F.G.
11
12
13
Description
See the detailed description below.
See the detailed description on the next page.
Leave this terminal unconnected.
Function
Load cell excitation voltage (+)
Sensing input (+)
Sensing input (-)
Load cell excitation voltage (-)
Load cell input (+)
Load cell input (-)
Shield
Standard serial output (Current loop)
Standard serial output (Current loop)
Frame ground
Earth ground
AC power source
AC power source
Load cell
connection
NOTE: Terminals 7 (SHLD) and 11 (E) are internally connected.
To avoid unintentional operations, keep the cover attached on the terminal block.
Screw size: M3, tightening torque: 0.5Nxm
AD-4408C Weighing Indicator
Page 10
3 CC-Link status LEDs
LED
RUN
SD
RD
ERR
ON
Normal
Transmitting
Receiving
• Setting error
• CRC error
• Station trouble
OFF
• Resetting
• No signal
Normal
Blinking
When a setting
value is changed.
.
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AD-4408C Weighing Indicator
5. Installation
The weighing indicator is a precision electronic instrument. Handle it
carefully.
5.1.
Precautions
5.1.1. Environment
The operating temperature is -10°C to +40°C.
Do not install the indicator in direct sunlight.
The indictor is not water-resistant. When used in an environment where the
indicator may be exposed to splashing water, secure the front panel to the control
panel using the accessory panel mount packing. It makes the front panel
water-resistant equivalent to IP-65.
Panel mount packing
Guide rail
Control panel
Washer Screw
Fig.3 Panel mounting method
AD-4408C Weighing Indicator
Page 12
5.1.2. Power source
Earth ground the indicator to prevent electrical shock or
indicator malfunction.
Before connecting the indicator to the power source, read the instruction manual
thoroughly.
Do not connect the indicator to the power source before the installation is complete.
To avoid electrical shock, do not handle the power cable with a wet hand.
Earth ground the indicator. Do not share the ground line with other electrical power
equipment.
The power requirement is 100 VAC to 240 VAC and the frequency is 50 Hz or 60 Hz.
Use a stable power source free from instantaneous power failure or noise.
To avoid a malfunction, do not share the power line with other devices.
The output voltage of a load cell is a very sensitive signal. Keep all electrical noise
sources away from the load cell and load cell cable.
Use shielded I/O cables. Connect the cable shield to the F.G. terminal or the
indicator housing.
5.2.
Load Cell Cable Type
Load cell cables should have high insulation and shielding performance.
Use shielded cables with the insulator that is made of materials with high insulation
resistance such as Teflon® and polyethylene.
NOTE: Teflon is a registered trademark of DuPont.
5.3.
Shield Connection
Connect the load cell shield wire only to the shield terminal (terminal 7 of the terminal
block located on the rear panel) of the AD-4408C.
No ground is connected between the load cell and the AD-4408C. This is to prevent the
ground loop generated by multiple ground points. Gound loop can be a major cause of
noise and interference.
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AD-4408C Weighing Indicator
5.4.
Load Cell Connection
Two types of load cell connection are available: 6-wire connection and 4-wire
connection.
For high precision and stable weighing, 6-wire connection is recommended.
(A) 6-wire connection
(B) 4-wire connection
Fig.4 Load cell connection
AD-4408C Weighing Indicator
Page 14
Type
Advantages
The error is small
even when the load
cell cable is
6-wire connection
extended, a thin load
(recommended)
cell cable is used, or
multiple load cells
are used.
Disadvantages
Use a 6-wire
shielded cable
Complicated wiring
when a summing
box is used.
The influence of
the load cell cable
resistance worsens
the temperature
coefficient.
Prone to the
influence of the
contact resistance
of the connector
4-wire connection Simple wiring
Description
The error
increases when
the load cell cable
is extended or
multiple load cells
are used.
Precautions on performing the 4-wire connection
Be sure to connect terminals 1 and 2 (EXC+ and SEN+) and terminals 3 and 4
(SEN- and EXC-).
If the cable needs extending, use a cable with as large a cross-sectional area as
possible or keep the cable as short as possible.
5.5.
Checking the Load Cell Connection
When the load cell connection is complete, follow the procedure below to check the
connection.
Step 1 Perform a visual check to ensure that the wiring is correct.
Step 2 Turn the AD-4408C ON.
All the digits may be OFF before calibration. Even under such a condition, the
check mode can be used.
Step 3 Enter the check mode and check the load cell output value.
Refer to “10.2.1. Entering the check mode” to enter the A/D check mode.
Step 4 Confirm that the displayed load cell output value matches the specified value.
Normally the displayed value will be the load cell rated output value or less.
Step 5 If an error occurs, refer to “10.4. Checking the Load Cell Connection Using the
Digital Multimeter” to check the connection.
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AD-4408C Weighing Indicator
6. Operation
6.1.
General Function
6.1.1. Zero adjustment
Zero adjustment is a function to set the gross weight to zero. It is performed by
pressing the ZERO key or by a command from the CC-Link master station.
The zero adjustment range is set in Calf05 (zero adjustment range) and is
expressed in percent of the weighing capacity with the calibration zero point as the
center.
Zero adjustment is disabled, even within the zero adjustment range, when the A/D
converter overflow occurs.
A ZERO error is output if zero adjustment is not performed.
The zero value is stored in the battery backup RAM and is maintained, even if the
power is disconnected.
Clearing the zero value is performed using the F key assigned to clear the zero
value. Alternately, apply power to the indicator while holding down the TARE key, or with
the indicator in the OFF mode, press and hold the TARE key and press the ON/OFF key,
to clear the zero value.
Functions related to zero adjustment
z Calf05: Changes the zero adjustment range. (0 to 100%)
z Calf10: Enables or disables zero adjustment when unstable.
z Calf16: Enables or disables power-ON zero (function to zero upon power-ON).
6.1.2. Zero tracking
Zero tracking is a function to track the weight drift around the zero point to maintain
zero.
The zero tracking time is set in Calf06 (zero tracking time) and the zero tracking
band is set in Calf07 (zero tracking band). When the weight drift is within the
specified ranges, zero tracking is performed automatically.
A ZERO error is not output even if zero tracking is not performed.
Functions related to zero tracking
z Calf06: Changes the zero tracking time. (0.0 to 5.0 seconds)
z Calf07: Changes the zero tracking band. (0.0 to 9.9 d)
AD-4408C Weighing Indicator
Page 16
6.1.3. Tare
Tare is a function to store the gross weight as the tare value and set the net weight to
zero.
The tare weight is stored in the battery backup RAM and is maintained, even if the
power is disconnected.
Clearing the tare weight is performed using the F key assigned to clear the tare weight.
Alternately, apply power to the indicator while holding down the TARE key, or with the indicator in
the OFF mode, press and hold the TARE key and press the ON/OFF key, to clear the tare weight.
Functions related to tare
z Calf10: Enables or disables tare when unstable.
z Calf11: Enables or disables tare when the gross weight is negative.
6.1.4. F key
Assign a function to the F key in the general functions.
Functions related to the F key
zfncf02: Assigns a function to the F key from the functions below:
0: None
1: Manual print command
2: Hold
3: Alternate switch (Read the description below.)
4: Momentary switch (Read the description below.)
5: Clear the tare weight
6: Clear the zero value
zCalf15: Enables or disables clearing the zero value.
zCalf20: Enables or disables the print command when the gross weight is negative.
Alternate switch and momentary switch
zBy assigning these switches to the F key, the ON/OFF status of the F key can be
transmitted to the CC-Link master station. This is useful when building a CC-Link
network or performing maintenance.
zIn the case that the station number is 1 and the number of occupied stations is 4, the
ON/OFF status is transmitted to RX006F of the address map (In sync with †
display) . (ON: 1, OFF: 0)
zThese switches perform as below:
Alternate switch
Press the switch once and release the switch to turn ON or OFF.
Press the switch again to turn OFF or ON.
Momentary switch
Only when the switch is being pressed, the F key is ON. When released, OFF.
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AD-4408C Weighing Indicator
6.1.5. † display
Assign a function to the † display in the general functions.
Functions related to the † display
zfncf04: Assigns a function to the † display from the functions below:
0: None
1: Zero tracking in progress
2: Alarm (Zero range setting error, over, low battery)
3: F key status (Read the description below.)
F key status
zEnables when alternate switch or momentary switch is selected for fncf02.
The display turns ON when the F key is ON and turns OFF when the F key is OFF.
6.1.6. Memory backup
The indicator has two kinds of memory.
EEPROM
Memory used to store important data, without power
supplied, that the occurrence of re-writing is seldom.
Data example: Calibration data, Function data
Battery backup RAM
Memory backup
Data
Calibration data
Function data
Zero value
Tare weight
AD-4408C Weighing Indicator
Memory used to store temporary data that the occurrence
of re-writing is often.
Data example: Zero value, Tare weight
Method
Description
EEPROM
Maintained regardless of battery condition.
Battery
backup RAM
The life of the battery is approximately 10 years
at 25°C with the power disconnected.
Page 18
6.2.
Mode Map
The indicator has several modes to perform various operations.
Perform mode switching by key operation as shown below, only in the direction of the
solid arrow.
After setting a mode, the indicator resets automatically. Alternately, the indicator resets,
when the power is disconnected.
Automatic reset after setting
Power ON
Weighing
mode
Switch using
the ON/OFF key
See the note
below.
OFF
mode
NOTE: When the power is
disconnected with OFF
mode, the indicator
starts with OFF mode
upon power-ON again.
General
function mode
Enter using the key combination
ENTER + F
Initialization
mode
Maintenance
mode
Enter using the key combinations
ENTER + F
and then
ZERO + ENTER
Calibration
mode
Check
mode
Calibration using
an actual load
Calibration-related
function mode
Enter using the CAL key
All data
initialization mode
Fig.5 Mode map
Page 19
AD-4408C Weighing Indicator
7. Calibration
7.1.
General Description
In the calibration mode, the operation to relate the output voltage from a load cell to the
mass value and other operations directly related to weighing are performed.
Calibration with an
actual load
Calibration-related
function
Digital span
All data initialization
Calibration is performed using a calibration weight.
• Zero calibration: Adjusts the indicator so that the
measured value will be zero when no
load is applied to the load cell.
• Span calibration: Enter the calibration weight value and
place the calibration weight on the load
cell.
When the indicator enters the mode of calibration with an
actual load, the tare weight and the zero value will be
automatically cleared.
Setting basic constant values of the indicator such as the
minimum division and weighing capacity and other data
directly related to weighing is performed.
Setting the parameters for digital span calibration is also
performed.
Calibration is performed without an actual load, by keying in
the load cell output voltage (mV/V).
• Input voltage at zero: Key in the load cell output at zero.
• Input voltage at span: Key in the load cell output at span.
(Load cell output at full capacity – load cell output at zero)
• Calibration weight value at span:
Key in the calibration weight value
corresponding to the input voltage at
span.
(The input voltage at span is related to the mass value.)
Clears all the data in the EEPROM and battery backup
RAM.
NOTE: All the data set in the calibration mode is stored in the EEPROM and is
maintained regardless of battery condition.
AD-4408C Weighing Indicator
Page 20
7.2.
Calibration With an Actual Load (Cal5et)
Calibration is performed using a calibration weight
Before performing calibration for the first time, set the unit, decimal point position,
minimum division and weighing capacity in the calibration-related function mode.
NOTE: To avoid drift caused by changes in temperature, warm up the indicator for
ten minutes or more before performing calibration with an actual load.
Step 1 Press the ON/OFF key to turn the indicator ON (weighing mode) if it is in the
OFF mode.
Remove the CAL key cover and press the CAL key.
CalL is displayed to indicate that the indicator enters the calibration mode.
Step 2 Press the ENTER key to display Cal5et . The indicator enters the mode of
calibration with an actual load. To return to the weighing mode, press the ESC
key.
Zero calibration
Step 3 Press the ENTER key to display Cal 0 .
If zero calibration is not to be performed, press the F key and go to step 5.
To monitor the current weight value, press the CAL key. Press the CAL key
again to display
CalL 0 .
Step 4 With nothing placed on the load cell, wait for the stabilization indicator to turn
ON and press the ENTER key. - - - - - - is displayed for approximately two
seconds.
Span calibration
Step 5 Press the ENTER key when Cal5pn is displayed.
The calibration weight value (the weighing capacity currently set) is displayed
and the least digit of the value blinks.
< > ∧ ∨ keys: Press to correct the value to the value of the calibration weight
used.
CAL key
: Press to monitor the current value (the gross weight) and
press again to display the calibration weight value.
ESC key
: Press three times to return to the weighing mode without
performing span calibration.
Step 6 Place a calibration weight on the load cell. Wait for the stabilization indicator to
turn ON and press the ENTER key. - - - - - - is displayed for approximately
two seconds.
Step 7
Calend
is displayed. To re-adjust the span, press the F key.
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AD-4408C Weighing Indicator
Step 8 Press the ESC key. Cal5et is displayed and the calibration data is written
into the EEPROM.
The current state is the same as that of step 2. To return to the weighing mode,
press the ESC key again.
NOTE: If C errX is displayed, an error has occurred. Refer to “7.4. Calibration
Errors” to take some measures.
If the decimal point blinks, it indicates that the current value is not the
weight value.
AD-4408C Weighing Indicator
Page 22
7.3.
Calibration-Related Functions (Calf)
Step 1 Press the ON/OFF key to turn the indicator ON (weighing mode) if it is in the
OFF mode.
Remove the CAL key cover and press the CAL key.
Cal
is displayed to indicate that the indicator enters the calibration mode.
Step 2 Press the ENTER key to display Cal5et . The indicator enters the mode of
calibration with an actual load. To return to the weighing mode, press the ESC
key.
Step 3 Press the ∧ or ∨ key to select
CalfF
and press the ENTER key.
Step 4 Press the ∧ or ∨ key to select a function number to be used and press the
ENTER key. The current setting value is displayed.
Step 5 Change the value as necessary. Two methods to change are available,
depending on the function number as below
Method
Description
Only the available parameter is displayed and blinks.
Selecting a parameter
Press the ∧ or ∨ key to select a parameter.
All the digits are displayed and a digit to be changed
blinks.
Inputting the value
Press the < or > key to select a digit and
press the ∧ or ∨ key to change the value.
After setting, press the ENTER key. The next function number is displayed.
When the value is not to be changed, press the ESC key to return to the
function number display.
Step 6 Press the ESC key.
Cal5et
is displayed and the data of the
calibration-related functions is written into the EEPROM.
The current state is the same as that of step 2. To return to the weighing mode,
press the ESC key again.
NOTE: If a value exceeding the settable range is entered, err dt is displayed and
the input is canceled.
If the decimal point blinks, it indicates that the current value is not the
weight value.
Page 23
AD-4408C Weighing Indicator
Function No.
Parameter or
Setting range
Function
Calf01
0 to 3
Unit
Calf02
0 to 5
Decimal
point
position
Calf03
1 to 6
Minimum
division
Calf04
Weighing
1 to 999999 capacity
Calf05
0 to 100
Description
Unit of the weight value
0: None
1: g
2: kg
3: t
4: lb (USA version)
Decimal point position of the weight value
0: None 123456
12345.6
1: 101
2: 102
1234.56
3
3: 10
123.456
4: 104
12.3456
5
5: 10
1.23456
Minimum division (d) of the weight value
1: 1
2: 2
3: 5
4: 10
5: 20
6: 50
Weighing capacity of the weighing
instrument
Weighing is possible up to the value of this
setting plus 8 d. If the value exceeds this,
overflow will occur and will not be
displayed.
The decimal point position is the same as
the setting of Calf02.
Range to enable zero adjustment by the
ZERO key or a command from the CC-Link
master station.
Expressed in percent of the weighing
capacity with the calibration zero point as
Zero
the center, when performing power-ON
adjustment
zero, with the initial zero point as the
range
center.
For example, if this is set to 2, the value in
the range of ±2% of the weighing capacity
with the calibration zero point at the center
will set to zero.
AD-4408C Weighing Indicator
Page 24
Default
value
2
0
1
20000
2
Function No.
Parameter or
Setting range
Calf06
0.0 to 5.0
Calf07
0.0 to 9.9
Function
Default
value
Description
Zero
tracking
time
Performs zero tracking using this setting in
combination with the setting of the zero
tracking band.
When 0.0, zero tracking will not be
performed.
Zero
tracking
band
Unit: second in 0.1 increments
Performs zero tracking using this setting in
combination with the setting of the zero
tracking time.
When 0.0, zero tracking will not be
performed.
0.0
0.0
Unit: d (minimum division) in 0.1 increments
Page 25
AD-4408C Weighing Indicator
Function No.
Parameter or
Setting range
Calf08
0.0 to 9.9
Calf09
0 to 9
Function
Default
value
Description
Stability
detection
time
Performs stability detection using this setting
in combination with the setting of the stability
detection band.
When 0.0, stability detection will not be
performed. (Stable all the time)
Stability
detection
band
Unit: second in 0.1 increments
Performs stability detection using this setting
in combination with the setting of the stability
detection time.
When 0, stability detection will not be
performed. (Stable all the time)
1.0
2
Unit: d (minimum division)
Stability detection outputs the STABLE signal when changes in
the weight value are within a certain range during a certain time.
Weight
value
CALF09
CALF08
CALF09
CALF08
STABLE
signal
Calf10
0 to 1
Calf11
0 to 1
Calf12
0 to 1
Tare and
zero
adjustment
when
unstable
Tare when
the gross
weight is
negative
Output
when
overflow
and
unstable
AD-4408C Weighing Indicator
Tare and zero adjustment when the weight
value is unstable.
0: Disables both functions.
1: Enables both functions.
1
Tare when the gross weight is negative.
0: Disables tare.
1: Enables tare.
1
Standard serial output if the weight value
overflows and is unstable.
0: Disables output.
1: Enables output.
1
Page 26
Function No.
Parameter or
Setting range
Calf13
1 to 3
Calf14
1 to 2
Calf15
0 to 1
Calf16
0 to 1
Calf17
-7.00000 to
7.00000
Calf18
0.00001 to
9.99999
Calf19
1 to 999999
Function
Description
Condition to judge over when the gross
weight is negative.
Over at
A/D negative over or
negative
1: Gross weight < -999999
gross weight
2: Gross weight < negative weighing capacity
3: Gross weight < -19 d
Condition to judge over when the net
Over at
weight is negative.
negative net
Gross weight negative over or
weight
1: Net weight < -999999
2: Net weight < negative weighing capacity
Select whether or not to clear the zero
Clear the zero value.
value
0: Disables.
1: Enables.
Select whether or not to perform zero
Zero upon
upon power-ON.
power-ON
0: Disables.
1: Enables.
Input voltage from a load cell at zero.
Input voltage
at zero
Default
value
1
1
1
0
Unit: mV/V
In zero calibration during the calibration 0.00000
with an actual load, this value is
determined.
Input voltage from a load cell at span
Unit: mV/V
Input voltage
In span calibration during the calibration 2.00000
at span
with an actual load, this value and the
value of Calf19 are determined.
The calibration weight value corresponding
Calibration
to the Input voltage at span of Calf18.
weight value
corresponding When performing digital span, Calf17,
20000
to Input
18 and 19 are required.
voltage at
The decimal point position is the same as
span
the setting of Calf02.
Page 27
AD-4408C Weighing Indicator
Input
voltage
CALF18
CALF17
CALF19
0
Displayed
weight
0
NOTE: Record the setting values of Calf17, 18 and 19 in the “Setting List” at
the end of the manual to prepare against a failure.
By changing the parameters of Calf17, 18 and 19, “zero calibration”
and “span calibration” can be adjusted optionally. (Digital span
accuracy approx. 1/5000: The accuracy varies depending on the load
cell output accuracy and the conditions of calibration.)
Except for an emergency, perform calibration with an actual load.
Calf20
0 to 1
Output when
the gross weight
is negative
Calf21
0 to 1
Communication
restriction
Calf22
1 to 2
Header 2
AD-4408C Weighing Indicator
Output by the manual print command when
the gross weight is negative.
0: Enables output.
1: Disables output.
Restriction on network-related
communication such as changing station
numbers or ID numbers and outputting by
auto printing
0: Disables restriction.
1: Enables restriction.
Second header for serial output
1: GS / NT / TR
2: G_ / N_ / T_ (_ space)
Page 28
0
0
1
7.4.
Calibration Errors
When an error occurs during calibration, the error number is displayed.
If calibration is finished without releasing the error, the setting values will be restored to
the state before calibration.
Calibration errors and remedies
Error No.
Description
C err1
C err2
C err3
C err4
C err5
C err6
C err8
C err7
Remedy
Make the minimum division
greater or make the
The
display
resolution
(weighing weighing capacity smaller.
capacity / minimum division) exceeds
The specified value
the specified value.
depends on the instrument
or specifications.
Check the load cell rating
and connection.
Voltage at zero calibration exceeds in
When nothing is wrong with
the positive direction.
the rating and connection,
adjust the load cell output
as described in the next
section.
Voltage at zero calibration exceeds in When the load cell or A/D
converter may be the cause
the negative direction.
of error, confirm it by using
the check mode.
The value of the calibration weight
Use an appropriate
exceeds the weighing capacity.
calibration weight and
The value of the calibration weight is
calibrate again.
less than the minimum division.
Use a load cell with higher
The load cell sensitivity is not sufficient. sensitivity or make the
minimum division greater.
The load cell output voltage is too high Use a load cell with a
when the load of the weighing capacity greater rating or make the
is placed.
weighing capacity smaller.
Voltage at span calibration is less than Check
the
load
cell
voltage at the zero point.
connection.
Page 29
AD-4408C Weighing Indicator
7.5.
Load Cell Output Adjustment
Add a resistor as shown below to adjust the load cell output.
Use a resistor with a high resistance value and a low temperature coefficient.
SIG-
"C Err 3"
When exceeding in the negative direction)
EXC+
EXC+
r
to
is
es d
R dde
a
R
e
a d si s
de tor
d
"C Err 2"
(When exceeding in the positive direction)
SIG+
SIG-
EXC-
SIG+
EXC-
Fig.6 Load cell output adjustment
NOTE: As the zero adjustment range of the AD-4408C is wide, output adjustment is
rarely required for the normal load cell.
Before adjusting the load cell output, check the load cell (deformation,
clearance around the load cell, incorrect wiring and load cell type) and load
cell connection.
AD-4408C Weighing Indicator
Page 30
8. General Functions
General functions are divided into groups per function and are indicated by the group
name with the function number.
NOTE: General functions determine the AD-4408C performance and all the data are
stored in the EEPROM.
8.1.
Setting Procedure
Step 1 While holding down the ENTER key, press the F key.
fnc is displayed to indicate that the indicator will enter the general function mode.
Step 2 Press the ENTER key. The indicator enters the general function mode.
To return to the weighing mode without entering the general function mode,
press the ESC key.
Step 3 Press the ∧ or ∨ key to select the function group to be set.
Display
Group name
Basic function
fncf
Standard serial output
Cl f
CC-Link
CC f
Press the ENTER key. The function number will be displayed.
Step 4 Press the ∧ or ∨ key to select the function number to be set.
Press the ENTER key. The current setting value will be displayed.
Step 5 Change the setting value using either one of the methods below.
Method
Description
Only the available parameter is displayed and blinks.
Selecting a parameter
Press the ∧ or ∨ key to select a parameter.
All the digits are displayed and a digit to be changed
blinks.
Inputting the value
Press the < or > key to select a digit and
press the ∧ or ∨ key to change the value.
After setting, press the ENTER key. The next function number is displayed.
When the parameter is not to be changed, press the ESC key to return to the
function number display.
Page 31
AD-4408C Weighing Indicator
Step 6 Press the ESC key. The function number disappears and the indicator returns to
the state of step 2.
Press the ESC key to store the setting values in the EEPROM and return to the
weighing mode.
NOTE: If a value exceeding the settable range is entered, err dt is displayed and
the input is canceled.
If the decimal point blinks, it indicates that the current value is not the
weight value.
8.2.
Adjusting the Digital Filter
Adjust the digital filter using fncf05 (Digital filter) and fncf06 (Frequency divider
ratio).
Method 1
While fncf06 is fixed to 1 (divider ratio 1), adjust fncf05.
Cutoff frequency: 11.0 Hz to 0.7 Hz
Method 2
If Method 1 does not work, perform as follows:
While fncf05 is fixed to 8 (1.0 Hz), adjust fncf06.
Cutoff frequency: 0.5 Hz to 0.1 Hz
Digital filter cutoff frequency =
fncf05 cutoff frequency
fncf06 divider ratio
High cutoff frequency
Low cutoff frequency
High response speed
⇔ Low response speed
Prone to external disturbance
Less prone to external disturbance
AD-4408C Weighing Indicator
Page 32
8.2.
Basic Functions (fncf)
Function No.
Parameter or
Setting range
Ffncf01
000000 to
111111
Function
Disable
key switch
Default
value
Description
Each digit of the setting corresponds to a key
switch. Only available in the weighing mode.
0: Does not disable the key switch function.
1: Disables the key switch function.
Key assignment
6th
5th
4th
ZERO
TARE
Net/B/G
NET GROSS
3rd
2nd
1st
ON/OFF
ESC
ENTER
Assigns a function to the F key.
0: None
1: Manual print command
2: Hold
3: Alternate switch
4: Momentary switch
5: Clear the tare weight
6: Clear the zero value
NOTE: Clearing the zero value can be
enabled or disabled by Calf15
1: 20 times/second
2: 10 times/second
3: 5 times/second
Assigns a function to the … display.
0: None
1: Zero tracking in progress
2: Alarm (Zero range setting error, over,
low battery)
3: F key status
Selects a cutoff frequency.
0: None
1: 11.0 Hz
2: 8.0 Hz
3: 5.6 Hz
4: 4.0 Hz
5: 2.8 Hz
6: 2.0 Hz
7: 1.4 Hz
8: 1.0 Hz
9: 0.7 Hz
fncf02
0 to 6
F key
fncf03
1 to 3
Display
update
rate
fncf04
0 to 3
… display
fncf05
0 to 9
Digital
filter
fncf06
1 to 10
Frequency
Divides digital filter cutoff frequency by the
divider
setting.
ratio
1: Normal hold
Hold
2: Peak hold
fncf07
1 to 2
Page 33
000000
(binary)
0
1
0
8
1
1
AD-4408C Weighing Indicator
8.3.
Standard Serial Output (Cl f)
Function No.
Parameter or
Setting range
Function
Cl f01
1 to 5
Output
data
Cl f02
1 to 3
Data
transfer
mode
Cl f03
1 to 2
Baud rate
Description
1: Displayed weight
2: Gross weight
3: Net weight
4: Tare weight
5: Gross/Net/Tare
1: Stream
2: Auto printing (See the NOTE below)
3: Manual printing
1: 600 bps
2: 2400 bps
Default
value
1
1
2
NOTE: When “1: Enables restriction” is selected for Calf21 (Communication
restriction), auto printing will not be performed even if auto printing
conditions are met.
8.4.
CC-Link (CC f)
Function No.
Parameter or
Setting range
Function
CC f01
1 to 64
Station
number
CC f02
0 to 2
Occupied
stations
CC f03
0 to 4
Baud rate
CC f04
0 to 1
Initialization
CC f05
0 to 2
Output
data
AD-4408C Weighing Indicator
Description
n: Station number
0: One
1: Two
2: Four
0: 156 kbps
1: 625 kbps
2: 2.5 Mbps
3: 5 Mbps
4: 10 Mbps
0: Not required
(When the AD-4408C is turned on
and the CC-Link is ready, the remote
READY flag (RX007B) becomes
active without performing initialization.)
1: Required
(When the AD-4408C is turned on
and the CC-Link is ready, the remote
READY flag (RX007B) becomes
active after the initialization is
complete.)
0: Displayed weight
1: Net weight
2: Gross weight
Specify what data to output when the
number of occupied stations is 1 or 2.
Page 34
Default
value
1
2
4
1
0
9. Interface
9.1.
Standard Serial Output
The standard serial output with 0 to 20 mA can be connected to a device such as an
A&D printer or remote display. The interface has no power source. Therefore, the
external devices to be connected must have a power source. The setting values of the
standard serial output are changed in the general functions Cl f01 to Cl f03.
Type
Data bits
Start bit
Parity
Stop bit
Baud rate
Code
0 to 20 mA current loop
7 bits
1 bit
1 bit, even
1 bit
600, 2400 bps
ASCII
9.1.1. Connection
Standard
serial output
Standard
serial output
Internal circuit
Frame ground
8
9
C.LOOP
output
terminal
10
No polarity
C.L.
F.G.
Fig.7 Standard serial output pin connection
Fig.8 Standard serial output internal circuit
NOTE: The standard serial output connection has no polarity.
When a shielded cable is used, connect the shield to the F.G. terminal.
Page 35
AD-4408C Weighing Indicator
9.1.2. Output data
The data format used is A&D standard format. This is a format to be used with an A&D
printer or remote display and consists of two headers, data, unit and a terminator.
A&D standard format
Header 1
Header 2
Separator
Data (ASCII code)
Unit (five types)
ASCII code
ST
US
OL
GS
NT
TR
,
0 to 9
+
SP (space)
.
SP SP
SP g
kg
SP t
lb
Hexadecimal
[53 54]
[55 53]
[4F 4C]
[47 53]
[4E 54]
[54 52]
[2C]
[30 to 39]
[2B]
[2D]
[20]
[2E]
[20 20]
[20 67]
[6B 67]
[20 74]
[6C 62]
Description
Stable
Unstable
Overload
Gross weight
Net weight
Tare weight
No unit
g
kg
t
lb (USA version)
A&D standard format examples
Gross weight
Net weight
Tare weight
Data with a decimal point
Positive overflow
Negative overflow
Unstable data
“Output OFF” data
NOTE: The decimal point position is the same even when overflow occurs.
AD-4408C Weighing Indicator
Page 36
9.1.3. Data transfer mode
Three data transfer modes are available; stream, auto printing and manual printing.
Stream mode
Auto printing mode
Manual printing mode
9.2.
Transmits data in sync with the display update rate. If
the indicator can not catch up with the update rate
because of the baud rate, the transmission is paused
until the next updating.
The transmitted data is the same as what is being
displayed. Data that is not displayed is never
transmitted.
Transmits data once only when the weight value with
5 d or greater is stable.
For another transmission, the weight value must fall
below 5 d once.
Transmits data when the F key that is assigned to
Manual print command is pressed or a command is
sent from the CC-Link master station.
CC-Link
The AD-4408C CC-Link is a remote device station of CC-Link ver.1.10. When a
CC-Link is used, the AD-4408C can be controlled by the PLC remote I/O or remote
registers. So, the program can be simple. And connection to a PLC is simple, thus, a
weighing system can be built easily. The setting values of CC-Link are changed in the
general functions CC f01 to CC f04.
Station number
Number of occupied stations
Baud rate
Initialization
1 to 64
1 station, 2 stations, 4 stations
156 kbps, 625 kbps, 2.5 Mbps, 5 Mbps, 10 Mbps
Not required or required
Communications connector
The connector used can be attached or removed while the power is ON.
The function of each signal line is as follows.
DA
DB
DG
SLD
FG
Signal DA
Signal DB
Signal ground
Shield
Frame ground
Page 37
AD-4408C Weighing Indicator
Status LEDs
LED
RUN
SD
RD
ERR
ON
Normal
Transmitting
Receiving
• Setting error
• CRC error
• Station trouble
OFF
• Resetting
• No signal
Normal
Fig.9 CC-Link connector and LEDs
AD-4408C Weighing Indicator
Page 38
Blinking
When the setting
values are changed
9.2.1. Address map
Remote register (Number of occupied stations: 4)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
Remote
Buffer
Remote
Buffer
Station
Name
Name
register memory
register
memory
RWr0000
2E0
RWw0000
1E0
Net weight
RWr0001
2E1
RWw0001
1E1
1
RWr0002
2E2
RWw0002
1E2
Gross weight
RWr0003
2E3
RWw0003
1E3
RWr0004
2E4
Reserved
RWw0004
1E4
internally
RWr0005
2E5
RWw0005
1E5
Reserved
2
internally
RWr0006
2E6
Error code
RWw0006
1E6
RWr0007
2E7
Error sub-code RWw0007
1E7
RWr0008
2E8
RWw0008
1E8
Reserved
RWr0009
2E9
RWw0009
1E9
3
internally
RWr000A
2EA
RWw000A
1EA
RWr000B
2EB
RWw000B
1EB
RWr000C
2EC
RWw000C
1EC
Command
Command data
data response RWw000D
RWr000D
2ED
1ED
4
RWr000E
2EE
Command No. response RWw000E
1EE
Command No.
RWr000F
2EF
Reserved internally RWw000F
1EF
Reserved internally
Remote register (Number of occupied stations: 2)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
Remote
Buffer
Remote
Buffer
Name
Name
Station
register memory
register
memory
RWr0000
2E0
1E0
Displayed value RWw0000
(Net / Gross) RWw0001
Reserved
RWr0001
2E1
1E1
1
internally
RWr0002
2E2
Error code
RWw0002
1E2
RWr0003
2E3
Error sub-code RWw0003
1E3
RWr0004
2E4
Command
RWw0004
1E4
Command data
data response RWw0005
RWr0005
2E5
1E5
2
RWr0006
2E6
Command No. response RWw0006
1E6
Command No.
RWr0007
2E7
Reserved internally RWw0007
1E7
Reserved internally
Remote register (Number of occupied stations: 1)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
Remote
Buffer
Remote
Buffer
Station
Name
Name
register memory
register
memory
RWr0000
2E0
Displayed value RWw0000
1E0
(Net / Gross) RWw0001
RWr0001
2E1
1E1
Reserved
1
internally
RWr0002
2E2
Error code
RWw0002
1E2
RWr0003
2E3
Error sub-code RWw0003
1E3
Page 39
AD-4408C Weighing Indicator
Numeric values of the remote register
All the values are hexadecimal. Negative values are expressed by the two’s complement.
Decimal Hexadecimal (16 bits)
Hexadecimal (24 bits)
Hexadecimal (32 bits)
-10
FFF6
FFFFF6
FFFFFFF6
-1
FFFF
FFFFFF
FFFFFFFF
0
0000
000000
00000000
1
0001
000001
00000001
10
000A
00000A
0000000A
NOTE: Writing is prohibited in the internally reserved areas.
Writing in the remote output (RY) and the remote register (RWw) of the
internally reserved areas may cause the indicator to malfunction.
Values of the remote input (RX) and the remote register (RWr) of the
internally reserved areas are not fixed.
Error code
Error code
0
1
2
3
4
5
Error status flag (Indicator error)
No error
AD error (Module error)
EEPROM error (Writing error)
RAM error (Writing error)
Calibration error (Calibration value error)
Display error (Mode error)
AD-4408C Weighing Indicator
Page 40
Remote I/O (Number of occupied stations: 4)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
Remote
Buffer
Remote
Buffer
Station
Name
Name
input
memory
output
memory
RX0000
RY0000
Reserved
Reserved
internally
internally
RX0001
RY0001
Command processing
Command processing
RX0002
RY0002
response
request
RX0003
Read/write response RY0003
Read/write request
RX0004
Reserved
RY0004
internally
RX0005
RY0005
CPU normal
RX0006
RY0006
operation
0E0
160
RX0007
Reserved internally RY0007
RX0008
RY0008
Decimal 20
Reserved
1 3-bit
point 2
RX0009
RY0009
binary
internally
position 22
RX000A
RY000A
RX000B
RY000B
RX000C
RY000C
RX000D
RY000D
RX000E
RY000E
1
RX000F
RY000F
Reserved
RX0010
RY0010
Zero
internally
RX0011
RY0011
Clear zero
RX0012
RY0012
Tare
RX0013
RY0013
Clear tare
RX0014
RY0014
Hold
RX0015
RY0015
Net display
RX0016
RY0016
Gross display
RX0017
Stable
RY0017
Print command
0E1
161
RX0018
Reserved internally RY0018
RX0019
Capacity exceeded RY0019
RX001A
Hold in progress
RY001A
RX001B
RY001B
Reserved
RX001C
RY001C
Reserved
internally
RX001D
RY001D
internally
RX001E
RY001E
RX001F
Weighing failure
RY001F
RX0020
2
0E2
RX0020
162
|
|
|
Reserved internally
|
|
RX005F
3
0E5
RX005F
165
Page 41
AD-4408C Weighing Indicator
AD-4408C --> Master station
Master station --> AD-4408C
Remote
Buffer
Remote
Buffer
Station
Name
Name
input
memory
output
memory
RX0060
Net over
RY0060
RX0061
Net under
RY0061
RX0062
Gross over
RY0062
RX0063
Gross under
RY0063
RX0064
A/D over
RY0064
RX0065
A/D under
RY0065
Net in the
RX0066
RY0066
center of zero
Gross in the
RX0067
0E6
RY0067
166
center of zero
RX0068
Net display
RY0068
RX0069
Gross display
RY0069
RX006A
Tare in progress RY006A
Reserved
RX006B
Low battery
RY006B
internally
RX006C
Zero error
RY006C
RX006D
Tare error
RY006D
RX006E
Net display error RY006E
RX006F
In sync with …
RY006F
4
RX0070
RY0070
RX0071
RY0071
RX0072
RY0072
RX0073
Reserved
RY0013
internally
RX0074
RY0074
RX0075
RY0075
RX0076
RY0076
RX0077
RY0077
Request flag of
Reply flag of
RX0078
RY0078
0E7
167
initialization
initialization
Reply flag of initial
Request flag of initial
RX0079
RY0079
data setting
data setting
Request flag of
RX007A
Error status flag
RY007A
error reset
RX007B
Remote READY flag RY007B
RX007C
RY007C
Reserved
RX007D
Reserved
RY007D
internally
internally
RX007E
RY007E
RX007F
RY007F
AD-4408C Weighing Indicator
Page 42
Remote I/O (Number of occupied stations: 2)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
Remote
Buffer
Remote
Buffer
Station
Name
Name
input
memory
output
memory
RX0000
RY0000
Reserved
Reserved
internally
internally
RX0001
RY0001
Command processing
Command processing
RX0002
RY0002
response
request
RX0003
Read/write response RY0003
Read/write request
RX0004
Reserved
RY0004
internally
RX0005
RY0005
CPU normal
RX0006
RY0006
operation
0E0
160
RX0007
Reserved internally RY0007
RX0008
RY0008
Decimal 20
Reserved
1 3-bit
point 2
RX0009
RY0009
binary
internally
position 22
RX000A
RY000A
RX000B
RY000B
RX000C
RY000C
RX000D
RY000D
RX000E
RY000E
1
RX000F
RY000F
Reserved
RX0010
RY0010
Zero
internally
RX0011
RY0011
Clear zero
RX0012
RY0012
Tare
RX0013
RY0013
Clear tare
RX0014
RY0014
Hold
RX0015
RY0015
Net display
RX0016
RY0016
Gross display
RX0017
Stable
RY0017
Print command
0E1
161
RX0018
Reserved internally RY0018
RX0019
Capacity exceeded RY0019
RX001A
Hold in progress
RY001A
Reserved
RX001B
RY001B
internally
Reserved
RX001C
RY001C
internally
RX001D
RY001D
RX001E
RY001E
RX001F
Weighing failure
RY001F
Page 43
AD-4408C Weighing Indicator
AD-4408C --> Master station
Remote
Buffer
Station
Name
input
memory
RX0020
Net over
RX0021
Net under
RX0022
Gross over
RX0023
Gross under
RX0024
A/D over
RX0025
A/D under
Net in the
RX0026
center of zero
Gross in the
RX0027
0E2
center of zero
RX0028
Net display
RX0029
Gross display
RX002A
Tare in progress
RX002B
Low battery
RX002C
Zero error
RX002D
Tare error
RX002E
Net error
RX002F
In sync with …
2
RX0030
RX0031
RX0032
RX0033
Reserved
internally
RX0034
RX0035
RX0036
RX0037
Request flag of
RX0038
0E3
initialization
Reply flag of initial
RX0039
data setting
RX003A
RX003B
RX003C
RX003D
RX003E
RX003F
AD-4408C Weighing Indicator
Error status flag
Master station --> AD-4408C
Remote
Buffer
Name
output
memory
RY0020
RY0021
RY0022
RY0023
RY0024
RY0025
RY0026
RY0027
RY0028
RY0029
RY002A
RY002B
RY002C
RY002D
RY002E
RY002F
RY0030
RY0031
RY0032
RY0033
RY0034
RY0035
RY0036
RY0037
RY0038
RY0039
RY003A
Remote READY flag RY003B
RY003C
Reserved
RY003D
internally
RY003E
RY003F
Page 44
162
Reserved
internally
163
Reply flag of
initialization
Request flag of initial
data setting
Request flag of
error reset
Reserved
internally
Remote I/O (Number of occupied stations: 1)
Addresses are examples when the station number is set to 1.
AD-4408C --> Master station
Master station --> AD-4408C
Remote
Buffer
Remote
Buffer
Station
Name
Name
input
memory
output
memory
RX0000
RY0000
Zero
RX0001
RY0001
Clear zero
RX0002
RY0002
Tare
Reserved
RX0003
RY0003
Clear tare
internally
RX0004
RY0004
Hold
RX0005
RY0005
Net display
RX0006
RY0006
Gross display
RX0007
Stable
RY0007
Print command
0E0
160
RX0008
Reserved internally RY0008
RX0009
capacity exceeded RY0009
RX000A
Hold in progress
RY000A
RX000B
RY000B
Reserved
RX000C
RY000C
internally
RX000D
RY000D
RX000E
RY000E
Reserved
RX000F
Weighing failure RY000F
internally
RX0010
RY0010
1
RX0011
RY0011
RX0012
RY0012
RX0013
Reserved
RY0013
internally
RX0014
RY0014
RX0015
RY0015
RX0016
RY0016
RX0017
RY0017
Request flag of
Reply flag of
RX0018
RY0018
0E1
161
initialization
initialization
Reply flag of initial
Request flag of initial
RX0019
RY0019
data setting
data setting
Request flag of
RX001A
Error status flag
RY001A
error reset
RX001B
Remote READY flag RY001B
RX001C
RY001C
Reserved
RX001D
Reserved
RY001D
internally
internally
RX001E
RY001E
RX001F
RY001F
Weighing failure
Net over
Gross over
A/D over
Low battery
Tare error
Net under
Gross under
A/D under
Zero error
Net display error
Page 45
AD-4408C Weighing Indicator
9.2.2. Commands
The write command is used to send a command to the AD-4408C from the master
station. For details, refer to “Write command” in “9.2.3. Timing chart”.
Command No.
0
0
0
0
0
0
0
0
Command data
1
2
3
4
5
6
7
8
Command
Zero
Clear zero
Tare
Clear tare
Hold
Net display
Gross display
Print command
9.2.3. Timing chart
Below examples are when the station number is set to 1 and the number of occupied
stations is set to 4.
When the AD-4408 is turned on
When the AD-4408C is turned on and the CC-Link is ready, the request flag of
initialization (RX0078) becomes active.
The master station confirms that RX0078 is active, performs initialization and turns the
reply flag of initialization (RY0078) ON.
The AD-4408C turns the request flag of initialization (RX0078) OFF and turns the
remote READY flag (RX007B) ON.
Turn OFF the reply flag of initialization (RY0078) in the master station.
NOTE: When CC f04 of the CC-Link functions is set to 0 (Initialization not
required), the remote READY flag (RX007B) becomes active without
performing initialization.
When the request flag of initialization
(RX0078) is ON, the reply flag of
initialization (RY0078) is turned ON.
Power
ON
Request flag of initialization (RX0078)
Reply flag of initialization (RY0078)
Remote READY flag (RX007B)
Fig.10 Performance upon power-ON
AD-4408C Weighing Indicator
Page 46
When the request flag of
initialization (RX0078) is OFF,
the reply flag of initialization
(RY0078) is turned OFF.
Resuming from suspended modes
When the AD-4408C is in a mode that suspends weighing, such as calibration or OFF
mode, the remote READY flag (RX007B) becomes inactive because a correct weight
value can not be output.
To resume from this condition, take the same steps as described in “When the
AD-4408C is turned on” above.
Requesting initialization from the master station
When requesting the initial data setting to the AD-4408C from the master station, turn
the request flag of initial data setting (RY0079) ON while the remote READY flag
(RX007B) is active.
The AD-4408C turns the remote READY flag (RX007B) OFF and performs initial data
settings.
When initial data settings are complete, the reply flag of initial data setting (RX0079) is
turned ON.
Turn OFF the request flag of initial data setting (RY0079) in the master station.
When the remote READY flag
(RX007B) is ON, the request flag
of initial data setting (RY0079) is
turned ON.
When the reply flag of initial data
setting (RX0079) is ON, the
request flag of initial data setting
(RY0079) is turned OFF.
Request flag of initial data setting (RY0079)
Remote READY flag (RX007B)
Reply flag of initial data setting (RX0079)
When the reply flag of initial data setting
(RX0079) is OFF, the remote READY
flag (RX007B) is turned ON again.
Fig.11 Performance of request flag of initial data setting
Page 47
AD-4408C Weighing Indicator
Write command
Specify the data type to write by the command No. (RWw000E).
Place the data to write in the command data (RWw000C to RWw000D).
The read/write request (RY0003) is
OFF.
Read/write request (RY0003)
Command No. (RWw000E)
Command data (RWw000C to 000D)
Command processing request (RY0002)
Read/write response (RX0003)
Command No. response (RWr000E)
Command processing response (RX0002)
Fig.12 Performance of the write command
CPU normal operation
The CPU normal operation (RX0006) is a signal to check that the AD-4408C is turned
on and it functions normally. During normal operation, the signal is reversed at an
interval of 0.5 to 1 second.
CPU normal operation (RX0006)
0.5 to 1 second
Fig.13 CPU normal operation signal
AD-4408C Weighing Indicator
Page 48
Error status flag
When an error occurs to the AD-4408C, the remote READY flag (RX007B) becomes
inactive and the error status flag (RX007A) becomes active to inform the master station
of the error occurrence.
The master station requests to reset the error status flag, by activating the request flag
of error reset (RY007A).
Error status flag (RX007A)
Request
of error
reset (RY007A)
Errorflagreset
request
(RY007
Remote READY flag (RX007B)
Error code (RWr0006)
Error sub-code (RWr0007)
Error code (RWr0006) and
Error sub-code (RWr0007)
will be cleared to 0.
Fig.14 Resetting the error status flag
Page 49
AD-4408C Weighing Indicator
10. Maintenance
10.1.
Error Messages
If an error message is displayed, refer to the chart below to take proper measures.
Error message
ad err
ra err
eeperr
Calerr
lb err
C errX
err dt
10.2.
Cause
Remedy
Data can not be acquired
Repair is required.
from the A/D converter.
Data can not be written into
Repair is required.
the battery backup memory.
Perform initialization.
Correct data can not be
If initialization does not clear the
read from the EEPROM.
error, repair is required.
Calibration data is not
Perform calibration.
correct.
No battery backup. The Perform zero adjustment or clear
zero and tare values are the zero value. And then, update
cleared.
the zero value.
Calibration error
Refer to “7.4. Calibration Errors”.
The setting value is out of Check the setting value and set
the settable range.
again.
Check Mode
The check mode checks the performance of the display, key switches and external I/O.
10.2.1. Entering the check mode
Step 1 While holding down the ENTER key, press the F key.
fnc is displayed to indicate that the indicator will enter the general function
mode.
To return to the weighing mode, press the ESC key.
Step 2 While holding down the ZERO key, press the ENTER key.
1Chc is displayed to indicate that the indicator will enter the check mode.
Press the ENTER key again to display an item to be checked.
Step 3 Press the ∧ or ∨ key to select the item to be checked and press the ENTER key
to enter the check mode of the selected item.
To exit from the current mode, press the ESC key.
AD-4408C Weighing Indicator
Page 50
Display
Chckey
Chc Cl
Chc CC
Chc r5
Chc ad
Chc in
Chcpr9
C5 pr9
C5 eep
Item to be checked
Key switches
Standard serial output
CC-Link
Testing terminal
A/D (Load cell)
Internal count
Program version
Program checksum
Memory (EEPROM) checksum
10.2.2. Checking the key switches
With Chckey displayed, press the ENTER key to enter the key switch check mode. In
the key switch check mode, six squares ( … ) are displayed. Each square corresponds to
a key switch as shown below.
When a key switch is pressed, the corresponding square moves up ( … ).
When the CAL key is pressed, the minus LED turns ON.
To exit from the key switch check mode, press the ESC key twice.
CAL
ZERO
TARE
Net/B/G
NET GROSS
ON/OFF
ESC
ENTER
10.2.3. Checking the standard serial output
With Chc ClL displayed, each time the ENTER key is pressed, the test data is
transmitted with the baud rate set in the general functions and the decimal point blinks.
Test data S T , G S , + 0 0 0 0 0 . 0 k g
Page 51
CR LF
0.0
AD-4408C Weighing Indicator
10.2.4. Checking the CC-Link
With Chc CC displayed, press the ENTER key to enter the CC-Link check mode.
Press the ∧ or ∨ key to change the address.
Press the CAL key to transmit the request flag of initialization.
2 digits: Address (00 to 3F)
4 digits: Data (0000 to FFFF)
88.8888
Remote READY flag
Error status flag
Reply flag of initial data setting
Request flag of initialization
CPU normal operation
Link status
Address
05 to 0C
0D to 1C
25 to 2C
2D to 3C
Remote I/O
RY0000 to RY007F
RWw0000 to RWw000F
RX0000 to RX007F
RWr0000 to RWr000F
Buffer memory
160 to 167
1E0 to 1EF
0E0 to 0E7
2E0 to 2EF
10.2.5. Checking the testing terminal
The Chc r5 display is for checking the testing terminal. Do not use it.
10.2.6. Checking the A/D (load cell)
With Chc ad displayed, press the ENTER key to enter the A/D check mode. The load cell
output value is displayed in mV/V.
The example below is when the internal count is 1.23456 mV/V.
1.23456
If the internal count exceeds ±7mV/V, the load cell may be damaged or the load cell may
be connected incorrectly. Refer to “10.4. Checking the Load Cell Connection Using the
Digital Multimeter” to check the connection.
10.2.7. Checking the internal count
With Chc in displayed, press the ENTER key to enter the internal count check mode.
The internal count value (display value times 10) is displayed.
The example below is when the internal count is 123.
123.
AD-4408C Weighing Indicator
Page 52
10.2.8. Checking the program version
With Chcpr9 displayed, press the ENTER key to display the version of the current
program. The example below is when the program version is 1.00.
p001.00
10.2.9. Checking the program checksum
With C5 pr9 displayed, press the ENTER key to display the program checksum. The
example below is when the checksum is EF.
C500ef
10.2.10. Checking the EEPROM checksum
With C5 eepEP displayed, press the ENTER key to display the EEPROM checksum. The
memory set in the general functions is not counted.
The example below is when the checksum is EF.
C500ef
10.2.12. Checking the calibration-related functions
About the settings of the calibration-related functions, refer to “7.3. Calibration-Related
Functions”.
Page 53
AD-4408C Weighing Indicator
10.3.
Initialization Mode
The initialization restores the contents of the battery backup RAM and EEPROM to the
default values.
The three types of initialization are available as shown below.
Initialization mode
Display
RAM initialization
ini ra
General functions
initialization
inifnc
All data
initialization
iniall
Description
Initializes the contents of the battery
backup RAM only.
As the zero and tare values are stored in
the battery backup RAM, they will be
restored to 0.
Initializes the contents of the general
functions stored in the battery backup
RAM and EEPROM.
Initializes all the contents in the battery
backup RAM and EEPROM.
The calibration-related data is also initialized.
So, calibration is required before using
the indicator again.
10.3.1. RAM initialization / General functions initialization
Step 1 While holding down the ENTER key, press the F key.
fnc is displayed to indicate that the indicator will enter the general function
mode.
To return to the weighing mode, press the ESC key.
Step 2 While holding down the ZERO key, press the ENTER key.
1Chc
is displayed to indicate that the indicator will enter the check mode.
Step 3 Press the ∧ or ∨ key to select the initialization mode ( ini ) and press the
ENTER key.
Step 4 Press the ∧ or ∨ key to select the item to be initialized and press the ENTER
key.
Step 5 All the status LEDs blink to prompt a confirmation. To initialize, hold down the
ENTER key for three seconds or more.
After initialization, the indicator is reset and all the display segments are ON.
And the indicator enters the weighing mode.
To exit from this mode without performing initialization, press the ESC key.
AD-4408C Weighing Indicator
Page 54
10.3.2. All data initialization
Step 1 Remove the cover concealing the CAL key and press the CAL key.
Cal
is displayed to indicate that the indicator enters the calibration mode.
Step 2 Press the ENTER key to display Cal5et . The indicator enters the mode of
calibration with an actual load. To return to the weighing mode, press the ESC
key.
Step 3 Press the ∧ or ∨ key to select the all data initialization mode ( iniallLL ) and
press the ENTER key.
Step 4 All the status LEDs blink to prompt a confirmation. To initialize, hold down the
ENTER key for three seconds or more.
After initialization, the indicator is reset and all the display segments are ON.
And the indicator enters the weighing mode.
To exit from this mode without performing initialization, press the ESC key.
Page 55
AD-4408C Weighing Indicator
10.4.
Checking the Load Cell Connection Using the Digital Multimeter
Using the digital multimeter, load cell connection can be checked easily.
The figure below indicates the measurement points to check the connection.
When a summing box is used, the same measurements are required inside the box.
Fig.15 Checking the load cell connection
Checking the load cell connection
Measurement point
EXC+
1
EXC+
1
SEN+
2
What to measure
How to judge
Normally less than 100mV.
Voltage drop at
EXC+ of the load
cell cable
Can exceed 1V when the load cell cable is
extremely long.
Should be 0V for 4-wire connection.
EXC4
Load cell excitation
voltage
SEN3
EXC4
Normally less than 100mV.
Voltage
drop
at
Can exceed 1V when the load cell cable is
EXC- of the load cell
extremely long.
cable
Should be 0V for 4-wire connection.
SIG6
EXC4
Load cell
voltage
SIG+
5
SIG6
median
Load cell output
voltage
Correct value: 4.75 to 5.25V
About 2.5V (half of the excitation voltage)
Compared with the theoretical value
obtained from the load cell rating, actual
load and excitation voltage.
Normally 0 to 15mV.
AD-4408C Weighing Indicator
Page 56
If the AD-4408C does not function properly, contact the nearest A&D dealer.
Use the chart below to write necessary items before contacting the dealer.
Item
Record your value
Description
For 4-wire connection, a jumper is
□ 4-wire connection
required between EXC+ and
Load cell connection
SEN+, and between EXC- and
□ 6-wire connection
SIG-.
Load cell type
Load cell rating
[Unit
]
Load cell rated output
[mV/V]
Load cell maximum safe
[%]
overload
Number of load cells used
[pcs]
Summing box
(status of use)
Cable length between the indicator
Length of extension cable
[m] and the device such as a summing
box
Indicator initial load
[Unit
]
Indicator minimum
In case of decimal number, all the
[Unit
]
division
digits
Example: 0.002 kg
Indicator weighing
In case of decimal number, all the
[Unit
]
capacity
digits
Example: 10.000 kg
-0.1mV/V to load cell rated
Load cell output value at
[mV/V] sensitivity
the initial load (at no load)
(depending on the initial load)
When loaded to capacity, the
Load cell output value
Load cell output value
output value at the initial load +
[mV/V]
when loaded to capacity
at the load
load cell rated output
(or when a mass of
[Unit
]
(within the maximum safe
choice is loaded)
overload)
Measurement point
EXC+
SEN+
1
2
EXC+
EXC1
4
SENEXC3
4
SIGEXC6
4
SIG+
SIG5
6
What to measure
Voltage drop at EXC+ of the
load cell cable
Load cell excitation voltage
Voltage drop at EXC- of the
load cell cable
Load cell median voltage
Load cell output voltage
Page 57
Result
[mV]
[V]
[mV]
[V]
[mV]
AD-4408C Weighing Indicator
11. Setting List
When performing maintenance, use the following list as a memo.
In case of inquiry about the product, inform of the user setting.
11.1.
Basic Functions
Function No.
Parameter or
Setting range
Ffncf01
000000 to
111111
fncf02
0 to 6
fncf03
1 to 3
fncf04
0 to 3
fncf05
0 to 9
Description
Default
value
Disable key switch
000000
0: Does not disable the key switch function.
(binary)
1: Disables the key switch function.
Assigns a function to the F key.
0: None
1: Manual print command
2: Hold
0
3: Alternate switch
4: Momentary switch
5: Clear the tare weight
6: Clear the zero value
Display update rate
1: 20 times/second
1
2: 10 times/second
3: 5 times/second
Assigns a function to the … display.
0: None
1: Zero tracking in progress
0
2: Alarm (Zero range setting error, over,
low battery)
3: F key status
Digital filter (cutoff frequency)
0: None
1: 11.0 Hz
2: 8.0 Hz
3: 5.6 Hz
4: 4.0 Hz
8
5: 2.8 Hz
6: 2.0 Hz
7: 1.4 Hz
8: 1.0 Hz
9: 0.7 Hz
fncf06
1 to 10
Frequency divider ratio
1
fncf07
1 to 2
Hold
1: Normal hold
2: Peak hold
1
AD-4408C Weighing Indicator
Page 58
User
setting
11.2.
Standard Serial Output
Function No.
Parameter or
Setting range
Cl f01
1 to 5
Cl f02
1 to 3
Cl f03
1 to 2
11.3.
Description
Output data
1: Displayed weight
2: Gross weight
3: Net weight
4: Tare weight
5: Gross/Net/Tare
Data transfer mode
1: Stream
2: Auto printing
3: Manual printing
Baud rate
1: 600 bps
2: 2400 bps
Default
value
User
setting
1
1
2
CC-Link
Function No.
Parameter or
Setting range
CC f01
1 to 64
CC f02
0 to 2
CC f03
0 to 4
CC f04
0 to 1
CC f05
0 to 2
Description
Station number
n: Station number
Number of occupied stations
0: One
1: Two
2: Four
Baud rate
0: 156 kbps
1: 625 kbps
2: 2.5 Mbps
3: 5 Mbps
4: 10 Mbps
Initialization
0: Not required
1: Required
Output data
0: Displayed weight
1: Net weight
2: Gross weight
Page 59
Default
value
User
setting
1
2
4
1
0
AD-4408C Weighing Indicator
11.4.
Calibration-Related Functions
Function No.
Parameter or
Setting range
Description
Default
value
Calf01
0 to 3
Unit of the weight value
0: None
1: g
2: kg
3: t
4: lb (USA version)
2
Calf02
0 to 5
Decimal point position of the weight value: 10n
0
Calf03
1 to 6
Calf04
1 to 999999
Calf05
0 to 100
Calf06
0.0 to 5.0
Calf07
0.0 to 9.9
Calf08
0.0 to 9.9
Calf09
0 to 9
Calf10
0 to 1
Calf11
0 to 1
Calf12
0 to 1
Minimum division (d) of the weight value
1: 1
2: 2
3: 5
4: 10
5: 20
6: 50
Weighing capacity of the weighing instrument
1
The decimal point position is the same as
the setting of Calf02.
Range to enable zero adjustment by the
ZERO key or a command from the CC-Link
master station.
Expressed in percent of the weighing
capacity with the calibration zero point as
the center
Zero tracking time (Unit: second)
When 0.0, zero tracking will not be performed.
20000
Zero tracking band (Unit: 0.1 d)
When 0.0, zero tracking will not be performed.
Stability detection time (Unit: second)
When 0.0, stability detection will not be
performed.
Stability detection band (Unit: d)
When 0, stability detection will not be
performed.
Tare and zero adjustment when the weight
value is unstable.
0: Disables both functions.
1: Enables both functions.
Tare when the gross weight is negative.
0: Disables tare.
1: Enables tare.
Standard serial output if the weight value
overflows and is unstable.
0: Disables output.
1: Enables output.
0.0
AD-4408C Weighing Indicator
Page 60
2
0.0
1.0
2
1
1
1
User
setting
Function No.
Parameter or
Setting range
Calf13
1 to 3
Calf14
1 to 2
Calf15
0 to 1
Calf16
0 to 1
Calf17
-7.00000 to
7.00000
Calf18
0.00001 to
9.99999
Calf19
1 to 999999
Calf20
0 to 1
Calf21
0 to 1
Calf22
1 to 2
Description
Condition to judge over when the gross
weight is negative.
A/D negative over or
1: Gross weight < -999999
2: Gross weight < negative weighing capacity
3: Gross weight < -19 d
Condition to judge over when the net weight
is negative.
A/D negative over or
1: Net weight < -999999
2: Net weight < negative weighing capacity
Select whether or not to clear the zero
value.
0: Disables.
1: Enables.
Select whether or not to perform zero upon
power-ON.
0: Disables.
1: Enables.
Input voltage from a load cell at zero.
X.XXXXX mV/V
Input voltage from a load cell at span
X.XXXXX mV/V
The value of the calibration weight
corresponding to the span input voltage
Select whether or not to output when the
gross weight is negative.
0: Enables output.
1: Disables output.
Select whether or not to restrict
network-related communication.
0: Disables restriction.
1: Enables restriction.
Second header for serial output
1: GS / NT / TR
2: G_ / N_ / T_ (_ space)
Page 61
Default
value
User
setting
1
1
1
0
0.00000
2.00000
20000
0
0
1
AD-4408C Weighing Indicator
12. External Dimensions
Unit: mm
Fig.16 External dimensions
AD-4408C Weighing Indicator
Page 62
MEMO
Page 63
AD-4408C Weighing Indicator
MEMO
AD-4408C Weighing Indicator
Page 64
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