Longtec TR700 User manual

TR700 Instruction Manual
I
INSTRUCTION MANUAL
V01.14
LONGTEC
TR700
DIGITAL LOADCELL TRANSMITTER

TR700 Instruction Manual
II
Note：
Observe the instruction manual carefully before using the weighing indicator for the
first time, where you can find answers for many questions existing in the site
operation.
Check whether the other accessories of the weighing system match.
Avoid being exposed in direct sun shine, splashing of water and physical shocks.
Equip with the installation and repairing tools as possible: the mini-type minus screw
driver, digital multimeter, load cell simulator (mV signal generator).
©2010 LONGTEC Company Ltd.All proprietary rights are reserved.

TR700 Instruction Manual
III
CONTENT
1. GENERAL INSTRUCTION ..............................................................................................................................1
1.1. INSTRUCTION.................................................................................................................................................1
2. TECHNICAL PARAMETERS ..........................................................................................................................2
2.1. GENERAL SPECIFICATIONS.............................................................................................................................2
2.2. DIGITAL .........................................................................................................................................................2
2.3. ANALOG ........................................................................................................................................................2
3. INSTALLATION AND CONNECTION...........................................................................................................3
3.1 CAUTION .......................................................................................................................................................3
3.2 DIMENSIONS ..................................................................................................................................................3
3.3 WIRE CONNECTION AND INTERFACES............................................................................................................4
3.4 DISPLAY PANEL..............................................................................................................................................6
4. BASIC OPERATION DIAGRAM.....................................................................................................................8
4.1 BLOCK DIAGRAM ..........................................................................................................................................8
4.2 TR700 OPERATION FLOW CHART ..................................................................................................................9
4.3 TR700 FUNCTION TREE...............................................................................................................................10
5. GENERAL FUNCTION SETTING ................................................................................................................11
5.1. STEPS...........................................................................................................................................................11
5.2. FUNCTION TABLE.........................................................................................................................................12
6. COMMUNICATION PARAMETERSAND COMMUNICATION PROTOCOL......................................14
6.1. RS232/RS485 COMMUNICATION SELECTIONS.............................................................................................14
6.2. COMMUNICATION PARAMETER SETTING OF SERIAL INTERFACE 1................................................................15
6.3. LIST OF COMMUNICATION PARAMETERS OF SERIAL INTERFACE 1................................................................16
6.4. COMMUNICATION PROTOCOL OF SERIAL INTERFACE 1 ................................................................................16
6.4.1. Zhimei Protocol..................................................................................................................................16
6.4.2. Modbus Protocol.................................................................................................................................18
6.4.3. Longtec Protocol.................................................................................................................................24
7. CALIBRATION OF THE METER .................................................................................................................39
7.1. SIGNIFICANCE OF THE CALIBRATION............................................................................................................40
7.2. OPERATION OF THE CALIBRATION................................................................................................................41
7.2.1. Steps ...................................................................................................................................................41
7.2.2. Calibration in Kind.............................................................................................................................42
7.2.3. Digital Calibration..............................................................................................................................44
7.2.4. Modification of the Calibration Coefficient .......................................................................................46
7.3. CALDRAWING ............................................................................................................................................46
7.4. PARAMETER LIST OF CALIBRATION IN KIND ................................................................................................47
7.5. PARAMETER LIST OF DIGITAL CALIBRATION................................................................................................47
7.6. REMINDERS OF CALIBRATION ERROR ..........................................................................................................48

TR700 Instruction Manual
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8. DIAGNOSIS FUNCTION ................................................................................................................................49
8.1. OPERATION PROCEDURE OF DIAGNOSIS FUNCTION .....................................................................................49
8.2. LIST OF DIAGNOSIS FUNCTION.....................................................................................................................50
8.3. DESCRIPTION OF DIAGNOSIS FUNCTION ......................................................................................................50
8.3.1. Display of the Mill volt Value.............................................................................................................50
8.3.2. Key-press Testing ...............................................................................................................................50
8.3.3. Display Testing...................................................................................................................................51
8.3.4. Serial Port Testing...............................................................................................................................51
8.3.5. Display the Version Number...............................................................................................................51
8.3.6. Display the Serial Number..................................................................................................................51
8.3.7. External controlling input testing .......................................................................................................51
8.3.8. Relay Output Testing..........................................................................................................................51
8.3.9. Renew to the Default..........................................................................................................................52
9. EXPLANATION FOR COMPARISON CONDITION..................................................................................53
9.1. PROCEDURE OF PARAMETER SETTING..........................................................................................................53
9.2. LIST OF HIGHER/LOWER LIMIT PARAMETER SETTING..................................................................................55
10. SWITCH IN/OUTPUT.................................................................................................................................57
10.1. EXTERNAL CONTROL INPUT.........................................................................................................................57
10.1.1. the Connection between Input Interface and External Switch............................................................57
10.1.2. Connection between Input Interface and PLC....................................................................................57
10.2. CONTROL OUTPUT.......................................................................................................................................58
10.2.1. Description of Output.........................................................................................................................58
10.2.2. Description of Comparison Condition................................................................................................58
10.3. ANALOG OUTPUT ........................................................................................................................................59
10.3.1. Specification.......................................................................................................................................59
10.3.2. an Example of Output.........................................................................................................................59
11. ATTACH........................................................................................................................................................60
11.1. FUNCTION TABLE.........................................................................................................................................60
11.1.1. Parameter List of General Function Setting .......................................................................................60
11.1.2. RS232/RS485 Communication Parameter List ..................................................................................62
11.1.3. Parameter List of Calibration in Kind.................................................................................................63
11.1.4. Parameter List of Digital Calibration..................................................................................................64
11.2. LIST OF STANDARD CODE ASCII.................................................................................................................65
12. RECORD..............................................................................................................................................................66

TR700 Instruction Manual
1
1. General Instruction
1.1.Instruction
TR700 strain load cell, digital transmitter (transmitter for short) is a kind of multi-purpose signal
converter, integrating display, transmitting and control, with the function of serial digital signal
output and analog output etc. It is small and light, adopting guide way installation. Besides, it is
strictly tested by EMC, of high reliability, and adopts key operation and LED display at the same
time. It is applicable to all kinds of load cells of resistance strain gauge used in testing of pull,
pressure, tension, weighing material level, hopper scale, crane scale, hook scale, and tension &
pressure testing machine etc. Moreover, the analog load cell can be updated digitally, so that it could
be widely used for weighing and tension measurement in provision, light industry, metallurgy,
building material, chemical industry, colored metal, energy, and mechanism etc.
Terms Related
Definition
Scale Division The change of the show value in unit;
Only one of the numerical values (1, 2, 5, 10, 20, or 50) is optional.
Excitation Voltage The voltage to drive the resistance strain gauge sensor, provided by
the display
Resistance Strain
Gauge Sensor
It is a kind a assembly, converting force or weight data to voltage
signal
One resistance Gauge sensor contains two parts: one is a kind of metal
assembly called elastomer, deformed linearly via the force acting on
it; the other is a kind of strain chip, the resistance of which will
change via the magnitude of the elastomer’s deformation.
Output Ratio of
Resistance Strain
Gauge Sensor
The ratio of output signal voltage and excitation voltage of resistance
strain Gauge sensor, which is also called output sensitivity
Maximum Capacity The maximum that the weighing display could display;
It is preset before.
Resolution The minimum signal the meter can differentiate
Tare Load
The weight of the carrying device which can make the resistance
strain Gauge sensor output voltage
Weighing Division The change of calibrating weight in unit, displayed on the weighing
display

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2. Technical Parameters
2.1.General Specifications
1. Power supply ：DC 24V (18V～30V)
2. Power consumption ：Max. 10W
3. Operating temperature ：-5℃～to 45℃（23℉～117℉）
4. Humidity ：≤90% relative humidity（no condensation）
5. Weight ：Approx. 0.5kg
2.2.Digital
1. Digital display ：6 digits LED
2. LED height ：10 mm
3. Indicator ：Display the gross weight, the net weight, weight
variation, zero position, weight unit (Kg)
4. Negative display ：‘-’is at the most left digit
5. Overload display ：Display “O.L”
6. Scale capacity ：100～900,000
7. Scale division ：1，2，5，10，20 or 50
8. Decimal point ：4 different positions optional
2.3.Analog
1. Load cell type ：All kinds of resistance strain gauge force and weighing
load cell
2. Load cell in/output voltage ：DC 10V±5%，Maximum230mA
3. Output sensitivity ：0.5µ V/D～200µ V/D
4. Input resistance ：The resistance between each terminal can’t be less than
100MΩ at DC 500V
5. Zero voltage adjustment ：0.05mV～15.0mV
6. Input signal range ：0mV～+31mV
7. Capacity stability : ±8ppm/k of the reading
8. Temperature coefficient ：≤（0.0008% of the reading +0.3 division）/℃
9. Non-linear deviation ：≤0.005% of F.S
10. Conversion method ：Delta-sigma
11. Sampling speed ：Max. 100 times per second
12. Internal resolution ：16,000,000
13. Maximum display division ：50,000 divisions
14. Comparison cycle ：Approx. 100 times per second：

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Standard Accessory Digital output ：RS232 /RS485
Optional Accessory Analog output ：0～5V，0～10V，1~5V, 0～20mA,
4～20mA optional
3. Installation and Connection
3.1 Caution
Avoid being exposed to direct sun shine, an abrupt change of temperature and vibration；
The meter is in the best working state When temperature is approximate 20℃or 68℉and
relative humidity is about 50%;
It was tested by EMC, having the strong anti-interference ability. However, the analogue
output of sensors and in/output of RS232/RS485 is very sensitive to electronic noise, so
forbid connecting these signal cores with the power lines together, or the meter will be
disturbed. Meanwhile, keep these signal wires away from meters and other equipments’ AC
power. And shorten the length of signal wires or coaxial cables at the same time.
The ultimate accuracy of the weighing system is determined by the selection of weighing
sensors, installation, weight, signal connection, power etc together, not just by one of them.;
Analogue output is supported by single power, and the common terminal of the power can’t
be connected with other common wires or shielded wires together in case of short circuit or
damaging the meter.
The shielded wire of weighing sensor and signal wires or impulsive wires can’t compose a
circuit, or the input signal of the meter will not be stable.
3.2 Dimensions
Vertical view Side view

TR700 Instruction Manual
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3.3 Wire Connection and Interfaces
Charm 3-2 TR700 Wire Connection

TR700 Instruction Manual
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Number Definition Description
1 ＋24V The positive polarity of the module’s power supply ，
24V(18V-30V), switch power supply
2
0V
The ground of the module’s power
3 PE The protection of the module, for ground
4 Reservation
5 IN1 Digital input 1, Passive Connection Point
6 IN2 Digital input 2, Passive Connection Point
7 IN3 Digital input 3, Passive Connection Point
8 IN4 Digital input 4, Passive Connection Point
9 COMA Digital input for ground
10 AN+ Analog output+
11 AN- Analog output-
12
NC
13 NC
14 NC
15 NC
16 TX/A RS232 send terminal, RS485 A signal terminal
17 RX/B RS232 receive terminal, RS485 B signal terminal
18 GNDB RS232 和RS485 ground wire
19
NC
20 O1+ Solid relay output 1
21
O1-
Solid relay output 1
22
O2+
Solid relay output 2
23 O2- Solid relay output 2
24 O3+ Solid relay output 3
25 O3- Solid relay output 3
26 O4+ Solid relay output 4
27 O4- Solid relay output 4
28 EX+ Excitation voltage output+
29
SENSE+
Solid relay feed up+
30 EX- Excitation voltage output-
31 SENSE- Solid relay feed up-
32
SHD
The shield of sensors
33 SIG+ Signal input+
34 SIG- Signal output-
35 NC
36 NC
Table 3-1 the List of Terminals
It is only used as a signal transmitting. When multi-load cells are used, a junction box is to be used to
connect them in a parallel circuit and the final weighing signal is sent to the transmitter. The cable
between the junction box and the transmitter must have metal shielding. Refer to the Table 3-2.
Table 3-2

TR700 Instruction Manual
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The amount of load cells of
350Ω connected together Wire of NO.24（m）Wire of NO.20（m）Wire of NO.16（m）
1 240 600 1200
3
60
180
300
8
（maximum）40 120 200
3.4 Display panel
1,
Display Window
It is six-bit LED display, mainly used to display weight data or the other functional parameters. After
it is connected to the power supply, it displays ‘8.8.8.8.8.8.’for about 5 seconds, and then
automatically enters the weighing status.
The details are as follows. Table 3-3
Display
status
Weighing display
Function setting Calibration Higher/lower
limit setting
Diagnosis
Display
contents Weighing value Functional parameter Calibration parameter
Higher/lower
limit
parameter
Diagnosis
parameter
2, Status Lamp
Light
ON
OFF
Note
Gross
Display the gross
weight of the front
panel.
Only one light of Gross or
Net is on in the weighing
display state.
Net
Display the net weight
of the front panel.
Motion Scale on motion Scale on the stable state
Zero
The gross weight is
zero.
The gross weight is not
zero.

TR700 Instruction Manual
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Kg The unit is kilogram. Only one light of Kg or T is
on in the weighing display
state.
T The unit is ton
3, Key
From left to right：、、、、
Table 3-5
Key
Function
Description
Menu 1）In the weighing status, enter the menu;
2）In the menu setting, quit the menu;
3）In the sub-menus, enter the next sub-menu without saving the
parameters.
Gross/N
et 1）In the weighing status, exchange the state of net weight or gross weigh;
2）In the state of inputting data，move left.
Tare 1）In the weighting status, it is a key‘tare’（tare range：80% of the
max capacity;
2）In the menu setting, enter the former menu;
3）In the state of inputting data, increase the value.
Function 1）In the menu setting, enter the next menu;
2）In the state of inputting data，decrease the value.
Zero 1）In the weighing status, clear zero;
2）In the menu setting, conform;
3）In the sub-menu，save the parameters and enter the next
sub-menu .

TR700 Instruction Manual
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4. Basic Operation Diagram
4.1 Block Diagram
Diagram 4-1 Block Diagram

TR700 Instruction Manual
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4.2 TR700 Operation Flow Chart

TR700 Instruction Manual
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4.3 TR700 Function Tree
F00
F01
F05
F02
F03
F04
F06
F07
F08
F09
F10
F11
F12
F13
F14 F15
zero
filter coefficients
unit
000000 CoM1 C- 00
C- 01
C- 02
C- 03
C- 04
C- 05
C- 06
CoM2 C= 00
C= 01
C= 02
C= 03
C= 04
C= 05
C= 06
Calibration bit Serial 2
Rate Serial 2
00000
CAL1 C1.dECi
C1.d
C1.MAX
C1.ZEro
C1.SPAn
CAL2 C2.dECi
C2.d
C2.MAX
C2.ZEro
C2.SPAn
C2.SEn
CAL3 0000 050000 SAVEr
00000 SEt-HH
SEt--H
SEt--L
SEt-LL
LAg-HH
LAg--H
LAg--L
LAg-LL
000000 AdC.MV
KEY
DiSP
SEr SEr1 SEr1Er
SEr1okSEr2 SEr2Er
SEr2ok
Edit
S.n.
di
do
rESuME
di0001
di0000
do0000
do1111
r-CAL
r-FunC
r-SEt
r-CoM
00000
SEt
FunC
CoM
CAL
diAg
Weighing
state
PRESS
“MENU”
Gross/net
peeled
zero
PRESS “GR/NT”
PRESS “TARE”
PRESS “ZERO”
Function setting Input password
Serial1 Parameters
Diagnostics menu
Hi-Lo level
parameter
Calibration
Parameters Practicality calibrate
Minimum division
Zero demarcate
Sensitivity
Calibrate Coefficient
HH lines
H lines
L lines
LL lines
HH lag value
display millivolt value
Testing the key
dispaly test
version number
serial number
Default setting
Press“TARE”to closure
Renew calibrate
Renew LH Lines
Renew commnication
Serial 1 Test
Serial 2 error
Number4 input
no input
Press“FUNC”all disconnect
Motion detective
display rewrite rate
conditional output
configure Output 4
Zero tracking
Data bit Serial 2
Serial 2 Communication way
Seria l baud rate
Data bit Serial ports1
Minimum capacity
Capacity demarcate
Decimal point
Maximum capacity
Zero Calibrate
H lag value
L lag value
LL lag value
Digital output
configure Output 3
configure Output 2
configure Output 1
configure input 4
configure input 3
configure input 1
configure input 2
Input password
Serial Communication address 1
Serial Communication
Parameters
Serial 2 Parameters Serial Communication address 2
Input password
Digtal Calibrate
Decimal point
Capacity Calibrate
Minimum division
Serial 2 baud rate
Serial 2 Communication protocol
Serial 1 Communication protocol
Rate Serial 1
Calibration bit Serial 1
Serial 1 Communication way
Input password
Input password
Input password
Renew function setting
Serial 2 Test
Serial 2 ok
Serial 1 error
Serial 1 ok
Serial Test
Digital input
Chart 4-3 Function Tree

TR700 Instruction Manual
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5. General Function Setting
5.1.Steps
FunC F 00 F00 XX
F 01
F 02
F01 XX
FUNC
MENU
ZERO
TARE
ZERO
F 03
F 04
F 05
F 06
F 07
F 08
F 09
F 10
F 11
F 12
F 13
F 14
F 15
MENU
MENU
ZERO
FUNC
TARE
通过 调整XX
F02 XX
F03 XX
F04 XX
F05 XX
F06 XX
F07 XX
F08 XX
F09 XX
F10 XX
F11 XX
F12 XX
F13 XX
F14 XX
F15 XX
Chart 5-1 Function Parameter Setting Diagram
Press to display “FUNC”, and press to display“F0 00”, and press the 、to
select “F XX”，and then press to enter the parameter setting“FXX XX”. Press 、

TR700 Instruction Manual
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to input parameters，and press to save the parameters and enter the next function setting,.
Press to get back to the former function setting without saving the parameters, and then go on
pressing to get back to “FUNC”, and press again to get back to normal display.
5.2. Function Table
Numbe
r
F
XX
Name Defaul
t
Setting
Parameters
Range Description
00
Zero range
3
0-10
0 ：Zero function off;
1-10 ：It is 1％-10％of the capacity.
01 Zero tracking range
0
0-10
The display must be in zero tracking range
in 2s, and later it goes back to zero.
0 ：Do not perform zero tracking;
1-10
：
Display division.
02
Motion detection
range
3
0-10
0 ：Motion detection is off;
1-10 ：Display division.
03
Filter coefficient
3
0-9
0 ：No filtering;
1-9 ：The larger the figure is, the
greater the filter is.
04
Display updating rate
3
0-4
0
1 times per second
1
4 times per second
2
8 times per second
3
16 times per second
4
30 times per second
05
Unit conversion
0
0-1
0
kg
1
t
06
Sampling rate
0
0-3
0
25 times per second
1
50 times per second
2
100 times per second
3
200 times per second
07
Conditions of
comparison output
0
0-2
0
Gross weight
1
Net weight
2
Display value
08
Distribution of
external control input
1
3
0-8
0
Gross/net
1
Tare
2
Clear zero
3-7
Extended Functions
8
Keyboard lock
，
only lock the “zero, tare, gr/nt”
keys
0
Gross/net

TR700 Instruction Manual
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09
Distribution of
external control input
2
3
0-8
1
Tare
2
Clear zero
3-7
Extend Functions
8
Keyboard lock
，
only lock the “zero, tare, gr/nt”
keys
10
Distribution of
external control input
3
3
0-8
0
Gross/net
1
Tare
2
Clear zero
3-7
Extended Functions
8
Keyboard lock
，
only lock the “zero, tare and gr/nt”
keys
11
Distribution of
external control input
4
3
0-8
0
Gross/net
1
Tare
2
Clear zero
3-7
Extended Functions
8
Keyboard lock
，
only lock the “zero, tare and gr/nt”
keys
12
Distribution of relay
output 1
1
0-8
0
Forbidden output
1
Hi-Hi limit output
2
Hi limit output
3
Lo limit output
4
Lo-Lo limit output
5-8
Extended function
13
Distribution of relay
output 2
2
0-8
0
Forbidden output
1
Hi-Hi limit output
2
Hi limit output
3
Lo limit output
4
Lo-Lo limit output
5-8
Extended function
14
Distribution of relay
output 3
3
0-8
0
Forbidden output
1
Hi-Hi limit output
2
Hi limit output
3
Lo limit output
4
Lo-Lo limit output
5-8
Extended function
15
Distribution of relay
output 4
4
0-8
0
Forbidden output
1
Hi-Hi limit output
2
Hi limit output
3
Lo limit output
4
Lo-Lo limit output
5-8
Extended function

TR700 Instruction Manual
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6. Communication Parameters and Communication
Protocol
6.1.RS232/RS485 Communication Selections
TR700 can be calibrated directly through interface that maybe choose one by switch. Two
communication modes of the TR700’s serial interface 1, RS232 and RS485, are optional. It is chosen
by the data-chosen-switch. Refer to the following chart.
While the blue is on the left, and the RS232 is chosen; while on the right, the RS485 is chosen.

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6.2.Communication Parameter Setting of Serial Interface 1
C-0 C-0 XX
C-1 C-1 XX
FUNC
MENU
ZERO
TARE
ZERO
MENU
MENU
ZERO
CoM1
C-2
C-3
C-4
C-5
C-6
C-2 XX
C-3 XX
C-4 XX
C-5 XX
C-6 XX
FUNC
TARE
通过 调整XX

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6.3.List of Communication Parameters of Serial Interface 1
Number
C-XX
Name
Default
Setting
Parameter
range
Description
00
Communication
address
1
0-99
Communication address
01
Baud rate
1
0
4800 bps
1
9600 bps
2
19200 bps
3
38400 bps
4
57600 bps
5
115200 bps
02
Parity bit
2
0-2
0
Non
1
Odd
2
Even
03
Data bit
0
0-1
0
7
1
8
04
Communication mode
1
0-1
0
Continuous mode
1
instruction mode
05
Communication rate
2
0-5
0
4 times per second
1
8 times per second
2
16 times per
second
3
20 times per
second
4
32 times per
second
5
50 times per
second
6
60 times per
second
06
Communication
protocol
0
0-3
0
Zhimei protocol
1
Modbus protocol
2
Longtec protocol
6.4. Communication Protocol of Serial Interface 1
6.4.1. Zhimei Protocol
6.4.1.1.Signal Format
Data bit = 7 or 8;