Comet T4311 User manual

TRANSDUCER T4311, T4411
Programmable temperature transducer for RTD Pt1000 sensor with serial
output RS232 and RS485
Instruction manual

2 IE-SNC-T43(4)11-02
SETTING OF TRANSDUCER FROM THE MANUFACTURER.............................................................................3
INSTALLATION OF THE TRANSDUCER.................................................................................................................3
DIMENSIONS ...................................................................................................................................................................4
TYPICAL APPLICATION WIRING,CONNECTION OF TERMINALS .........................................................................................5
INFO MODE .....................................................................................................................................................................6
OPERATING CONDITIONS:................................................................................................................................................6
NOT ALLOWED MANIPULATION.......................................................................................................................................6
END OF OPERATION.........................................................................................................................................................6
Setting of transducer, selection of communication protocol.....................................................................................7
DESCRIPTION OF COMMUNICATION PROTOCOLS..........................................................................................8
MODBUS RTU ................................................................................................................................................................8
Supported functions ..................................................................................................................................................9
Jumper and button ....................................................................................................................................................9
Description of supported function.............................................................................................................................9
03 (0x03): Reading of 16-bit registers (Read Holding Registers)............................................................................................9
04 (0x04): Reading 16-bit input gates (Read Input Registers)...............................................................................................10
16 (0x10): Setting of several 16-bit registers (Write Multiple Registers)..............................................................................10
Exception Responses.............................................................................................................................................................13
Exception codes.....................................................................................................................................................................13
Modbus CRC...........................................................................................................................................................13
A procedure for generating a CRC is: ...................................................................................................................................13
Modbus registers of the transducer.........................................................................................................................14
Example of communication.....................................................................................................................................14
Reading of temperature, address 0x0031...............................................................................................................................14
PROTOCOL COMPATIBLE WITH ADVANTECH-ADAM STANDARD .................................................................................15
Jumper.....................................................................................................................................................................15
General syntax of commands..................................................................................................................................15
Description of supported functions.........................................................................................................................16
Configuration of transducer...................................................................................................................................................16
Response of the transducer....................................................................................................................................................16
Check sum (CRC)..................................................................................................................................................................16
Reading of the temperature....................................................................................................................................................16
Query to adjusted configuration ............................................................................................................................................17
Reading of name device ........................................................................................................................................................17
Reading of version firmware .................................................................................................................................................17
Error states.............................................................................................................................................................................17
Format of data ........................................................................................................................................................18
ERROR STATES OF THE TRANSMITTER.............................................................................................................18
ERROR 0 .......................................................................................................................................................................18
ERROR 1 .......................................................................................................................................................................18
ERROR 2 .......................................................................................................................................................................18
ERROR 3 .......................................................................................................................................................................18
READINGS ON LCD DISPLAY..................................................................................................................................18
TECHNICAL PARAMETERS OF THE INSTRUMENT:........................................................................................19
MEASURING PARAMETERS:...........................................................................................................................................19
APPENDIX A..................................................................................................................................................................20
CONNECTION OF ELO E06D CONVERTER (RS232/RS485)...........................................................................................20

IE-SNC-T43(4)11-02 3
Instruction Manual for use of transducer:
T4311 (RS232)
T4411 (RS485)
Transducer is designed for temperature measurement by means of the external temperature
probe with RTD Pt1000 sensor. It is built in a plastic case with the IP65 protection. Read this
manual before first transducer connection. Transducer T4311 communicates via link RS232,
transducer T4411 via link RS485. Supported communication protocols are Modbus RTU and
protocol compatible with standard Advantech-ADAM. Measured value is displayed on dual line
LCD display. Display can be also switched OFF. Output link RS485 of transducer T4411 is
galvanic isolated. Output link RS232 of transducer T4311 is NOT galvanic isolated. Setting of all
transducer parameters is enabled in accordance with procedure described in chapter „Setting of
transducer, selection of communication protocol“ or by means of commands of selected
communication protocol. For detailed description of features of protocols see chapter „Description
of communication protocols“.
Setting of transducer from the manufacturer
If special setting was not required in the order, transducer is set from the manufacturer to the
following parameters:
communication protocol: Modbus RTU
address of transducer: 01H
communication speed: 9600Bd, no parity, 2 stop bits
display: switched ON
Installation of the transducer
Transducer is designed for wall mounting. There are two mounting holes at the sides of the
case. Interconnection terminals are accessible after unscrewing four screws and removing the lid.
Lace the cable through a gland at the case wall. Connect the cable to terminals with respecting the
signal polarity (see figure). Terminals are self-clamping and can be opened by a suitable
screwdriver. For the opening, insert the screwdriver to upper terminal hole and lever by him. Do not
remember to tighten glands and case lid with inserted packing after cables connecting. It is
necessary for warranting of protection IP65.
Working position is negligible.
Transducer T4311 is supplied with connection cable equipped with connector for connection to
RS232 interface. For T4411 transducer (RS485) it is recommended to use shielded twisted copper
cable (e.g. SYKFY ) with outside diameter of the cable must be from 3 to 6.5 mm, maximal length
1200m. The cable must be located at indoor rooms.
Nominal cable impedance should be 100 Ω, loop resistance max. 240 Ω, cable capacity max.
65 pF/m. Suitable cable is e.g. SYKFY 2x2x0,5 mm2, where one wire pair serves for transducer
powering and second pair for communication link.
The cable should be led in one line, i.e. NOT to „tree“ or „star“. At the end termination
resistor should be located. For short distance other topology is allowed. Terminate the network by a
termination resistor. The value of the resistor is recommended about 120 Ω. For short distance
termination resistor can be left out.

4 IE-SNC-T43(4)11-02
The cable should not be led in parallel along power cabling. Safety distance is up to 0.5 m
otherwise undesirable induction of interference signals can appear.
Dimensions
T4311 – RS232
T4411 – RS485

IE-SNC-T43(4)11-02 5
Typical application wiring, connection of terminals
T4311 – power from communication port T4311 – power from external voltage source
T4411 – RS485

6 IE-SNC-T43(4)11-02
Info mode
If in doubt of setting of installed transducer, verification of its address is enabled even
without using computer. Power should be connected.
Unscrew transducer cover and shortly press button next to connection terminals (jumper
must be open). Actual adjusted address of transducer is displayed at decimal code. Next press of
button exits info mode and actual measured values are displayed.
Note: No measurement and communication is possible during info mode. If transducer stays in info
mode for longer than 15 s, transducer automatically returns to measuring cycle.
Operating conditions:
Operating temperature range: -30 to +70 °C, with switched OFF display up to +80°C
Operating relative humidity range: 0 to 100 %RH
Outer influence in accordance with EN 33-2000-3: normal environment with those specifications:
AE1, AN1, AR1, BE1
Working position: negligible
Electromagnetic compatibility: complies EN 61326-1
Storing conditions: temperature -30 to +80 °C, humidity 0 to 100 %RH without condensation
Dimensions: case with electronics 89 x 73 x 37 mm, length of stem 75 mm
Weight: approximately 200 g
Material of the case: ABS
Not allowed manipulation
It is not allowed to operate the device under conditions other than specified in technical parameters.
Devices are not designed for locations with chemically aggressive environment.
End of operation
Device itself (after its life) is necessary to liquidate ecologically!

IE-SNC-T43(4)11-02 7
Setting of transducer, selection of communication protocol
Each new setting of transducer parameters is stored in its internal memory1. If modification of
transducer setting is needed (communication protocol, its parameters, setting of LCD display)
proceed in following way:
•Connect transducer with PC, for T4411 (RS485) use converter RS485/RS232.
•Run program „HyperTerminal“ on your computer – it is a part of Windows operating system
(Start →Program Files →Accessory →Communication →HyperTerminal) and set
transmission parameters. I.e. enter name of new connection (e.g. Sensor), press button OK,
window „Connect“ appears. In field „Connect by means of“ select COM port, which transducer
is connected to (e.g. COM1) and press OK. In following window „COM1 – Features“ enter to
field:
„Bits per second“ 9600
“Data bits“ 8
“Parity“ None
“Number of stop-bits“ 1
“Flow control“ None
Continue by pressing OK.
•Select item „File“, „Features“ in menu. Select bookmark „Setup“, in the window, click on
„ASCII Setup... “ and modify all items in
accordance with following figure. Then press OK
•Unscrew 4 screws of transducer cover and
remove it. Plug in jumper.
•Press button inside of the transducer and only
now you can connect power voltage. If transducer
is powered directly from PC communication port
(for interface RS232), it is necessary first
disconnect communication cable, then press
button, connect communication cable (and also
power) and only now release button.
•LCD display of the transducer displays reading
„PC“.
1During writing to transducer memory no power failure should appear! Such failure can cause
damage of other settings stored in transducer!

8 IE-SNC-T43(4)11-02
•Running HyperTerminal displays main menu.
Select items one by one to set transducer:
0 …Displays actual setting of the transducer
1 …Selection of communication protocol and setting of its parameters (transducer address,
communication speed…). For entering numeric values use digits 0 to 9 and characters
„A“ to „F“ (upper case letters), transducer address is entered always as two digits
hexadecimal number (no decimal, e.g. address 11 i.e. Bh must be entered as 0B).
2 …Setting of LCD display of the transducer (display switched ON/OFF, selection of
displayed values)
8 …Setting communication to default value from manufacturer (Modbus, address 01h,
9600 Bd)
9 …End of setting
All changes in setting are continuously automatically stored.
•If needed, close transducer again with cover.
Description of communication protocols
To change of communication protocol proceed in accordance with chapter „Setting of transducer,
selection of communication protocol“
Note: After switching ON the power of the transducer, it can last up to 2 s transducer starts to
communicate and measure!
Modbus RTU
Control units communicate on master-slave principle in half-duplex operation. Only master
can send request and only addressed device responds. During sending of request no other slave
station should respond. During communication, data transfer proceeds in binary format. Each Byte

IE-SNC-T43(4)11-02 9
is sent as eight bit data word in format: 1 start bit, 8 bit data word (LSB first), 2 stop bits, no parity.
Transducer supports communication speed from 110Bd to 115200Bd.
Sent request and response have syntax: ADDRESS OF DEVICE – FUNCTION – Modbus CRC
Supported functions
03 (0x03): Reading of 16-bit registers (Read Holding Registers)
04 (0x04): Reading of 16-bit input gates (Read Input Registers)
16 (0x10): Setting of more 16-bit registers (Write Multiple Registers)*2
Jumper and button
Jumper and button are located next to connection terminals. If Modbus communication protocol is
used, the function of jumper and button is as follows:
•Jumper opened – transducer memory is write protect, from transducer is only enabled to
read measured value, writing to memory is disabled (no change of transducer address and
communication speed is enabled)
•Jumper closed – writing to transducer memory is enabled by means of function 16 (0x10):
Setting of several 16-bit registers (Write Multiple Registers)
•Jumper closed and pressed button for longer than three seconds – causes restoring of
manufacturer setting of communication protocol, i.e. sets transducer address to 01h and
communication speed to 9600Bd
•Jumper opened and pressed button – transducer goes to Info mode, see chapter „Info mode“
Description of supported function
03 (0x03): Reading of 16-bit registers (Read Holding Registers)
Function serves for reading of values from transducer. Addresses of available registers are listed
in chapter „Modbus registers of the transducer at page 14.“
Request:
----------------------------------------------------------------------------------------------
FUNCTION Function code 0x03
----------------------------------------------------------------------------------------------
DATA Initial address Hi 0x??
Initial address Lo 0x??
----------------------------------------------------------------------------
Number of registers Hi 0x??
Number of registers Lo 0x??
----------------------------------------------------------------------------------------------
Response:
----------------------------------------------------------------------------------------------
FUNCTION Function code 0x03
----------------------------------------------------------------------------------------------
DATA Number of Bytes 0x??
----------------------------------------------------------------------------
States of register Hi 0x??
States of register Lo 0x??
...
States of register Hi 0x??
2See detailed description of this function

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States of register Lo 0x??
----------------------------------------------------------------------------------------------
Exceptional response:
----------------------------------------------------------------------------------------------
FUNCTION Code of function 0x83
----------------------------------------------------------------------------------------------
DATA Code of exception 0x??
----------------------------------------------------------------------------------------------
During sending of query to transducer initial register address and number of registers to read are
sent. Register addresses are indexed from zero – register 0x2001 se physically sent as value
0x2000, 0x2002 as 0x2001…)
04 (0x04): Reading 16-bit input gates (Read Input Registers)
This function is also possible to use for reading values from transducer, syntax is the same as with
function 03 (0x03): Reading of 16-bit registers. Addresses of available registers are specified
in chapter „Modbus registers of the transducer at page 14.“
16 (0x10): Setting of several 16-bit registers (Write Multiple Registers)
Setting of transducer address and communication speed is possible to perform by writing to
transducer registers.
Attention! During write to transducer registers it is not enabled to write any number of registers.
Always below procedure should be strictly followed. If procedure is not followed, permanently loss
of important settings stored in transducer can occur! It is recommended to use procedure described
in chapter „Setting of transducer, selection of communication protocol“ for transducer setting
instead. Procedure enables also setting of all parameters of selected communication protocol.
Request:
-----------------------------------------------------------------------------------------------------
FUNCTION Function code 0x10
-----------------------------------------------------------------------------------------------------
DATA Initial address Hi 0x??
Initial address Lo 0x??
-----------------------------------------------------------------------------
Number of registers Hi 0x??
Number of registers Lo 0x??
-----------------------------------------------------------------------------
Number of Bytes 0x??
(of sent data)
-----------------------------------------------------------------------------------------------------
Response:
-----------------------------------------------------------------------------------------------------
FUNCTION Function code 0x10
-----------------------------------------------------------------------------------------------------
DATA Initial address Hi 0x??
Initial address Lo 0x??
-----------------------------------------------------------------------------
Number of registers Hi 0x??
Number of registers Lo 0x??
-----------------------------------------------------------------------------------------------------
Exceptional response:

IE-SNC-T43(4)11-02 11
-----------------------------------------------------------------------------------------------------
FUNCTION Function code 0x90
-----------------------------------------------------------------------------------------------------
DATA Code of exception 0x??
-----------------------------------------------------------------------------------------------------
Writing to transducer registers procedure:
•transducer address is stored at Modbus address 0x2001 as binary number
•code of communication speed is stored at Modbus address 0x2002
Communication
speed [Bd] Code of communication
speed [hex]
110 94F2
300 369D
600 1B4F
1200 0DA7
2400 06D4
4800 036A
9600 01B5
14400 0123
19200 00DA
38400 006D
56000 004B
57600 0049
115200 0024
1. Close jumper located next to connection terminals of the transducer.
2. Read entire area 0x2001 to 0x2040 to master device. Check sum of entire area is stored at
address 0x2040. It is calculated as sum of 16bit values from addresses 0x2001 to 0x2039.
Stored are lowest 16 bits of this sum – it enables to check correct reading of the area.
3. Modify content corresponding to addresses 0x2001 and 0x2002 in master device as
required. Setting of other values should not be changed!
4. Calculate new check sum of entire area, i.e. sum of 16bit values corresponding to values at
addresses from 0x2001 to 0x2039 and store lowest 16 bits to position corresponding to
address 0x2040.
5. Write such modified area together from master device to addresses from 0x2001 to 0x2040.
6. Open jumper.
Example: Transducer with address 0x01, communication speed 9600Bd, to change to address 0x9F
and 115200Bd
For reading area is sent via link: 01 03 20 00 00 40 4F FA
01 transducer address
03 command for reading of 16-bit registers
20 00 initial address (sent address is indexed from zero, during Modbus request for
reading of address 0x2001 physically is sent 0x2000 via link)
00 40 read 64 registers (0x40), i.e. 128 Byte
4F FA CRC of Modbus

12 IE-SNC-T43(4)11-02
response of the transducer is:
01 03 80 00 01 01 B5 00 00 30 30 3B 4B 77 D3 BD 35 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 84 70 00 00 86 2A 00 00 84 44 AA
80 85 07 A8 D0 57 7E 5F 94 F3 DC 00 12 2E DD 78 0C 40 AA 77 D3 F2 C4 00 12 17 78 77 F5 F3
EC 00 12 ED BF 77 D5 4F 10 77 D8 FF FF FF FF 40 DE 77 D3 2E F7 78 0C 06 5C 00 01 00 00 00
00 F3 DC 00 12 42 9F 53 2D 2C 8C
01 transducer address
03 code of command (reading 16-bit registers)
80 number of Bytes of response (0x80, i.e. 128 Byte)
00 01 address content 0x2001, i.e. original address of transducer 01h
01 B5 address content 0x2002, i.e. code of corresponding communication speed 9600Bd
…
…
53 2D check sum of entire area from 0x2001 to 0x2039
(0001+01B5+0000+3030+…+0012+429F = 0x532D)
2C 8C CRC of Modbus
Modification of data from read area:
00 9F 00 24 00 00 30 30 3B 4B 77 D3 BD 35 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 84 70 00 00 86 2A 00 00 84 44 AA 80 85 07
A8 D0 57 7E 5F 94 F3 DC 00 12 2E DD 78 0C 40 AA 77 D3 F2 C4 00 12 17 78 77 F5 F3 EC 00
12 ED BF 77 D5 4F 10 77 D8 FF FF FF FF 40 DE 77 D3 2E F7 78 0C 06 5C 00 01 00 00 00 00 F3
DC 00 12 42 9F 52 3A
00 9F new address of the transducer (original address was 00 01)
00 24 new code of corresponding communication speed 115200Bd (original was 01B5)
…
…
52 3A new check sum of entire area (009F+0024+0000+…+0012+429F = 0x523A)
Write such modified area together from master device to the transducer, area 0x2001 to 0x2040
01 10 20 00 00 40 80 00 9F 00 24 00 00 30 30 3B 4B 77 D3 BD 35 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 84 70 00
00 86 2A 00 00 84 44 AA 80 85 07 A8 D0 57 7E 5F 94 F3 DC 00 12 2E DD 78 0C 40 AA
77 D3 F2 C4 00 12 17 78 77 F5 F3 EC 00 12 ED BF 77 D5 4F 10 77 D8 FF FF FF FF 40
DE 77 D3 2E F7 78 0C 06 5C 00 01 00 00 00 00 F3 DC 00 12 42 9F 52 3A 61 22
01 original transducer address is still valid, i.e. 0x01
10 code of command, setting more 16-bit registers
20 00 initial address
00 40 number of write registers
80 number of Bytes of sent data
61 22 CRC of Modbus
After successful writing to the transducer, transducer responds: 01 10 20 00 00 40 CA 39 (still with
old address at original communication speed) and after response it sets to new values. In case of
different number of data or incorrect check sum of the entire area writing to transducer is not
performed.

IE-SNC-T43(4)11-02 13
Exception Responses
After sending query to the transducer, master device waits for normal response. After master device
query one of the following events can occur:
1. If transducer receives a query without communication error and query is possible to process,
master device receives response.
2. If transducer does not receive all queries due to communication error, no response is sent. Main
program is able to process condition of exceeding of time for query.
3. If transducer receives a query, but detects communication error (CRC), no response is sent.
Main program is able to process condition of exceeding of time for query.
4. If transducer receives a query without communication error, but cannot process it, master device
receives exception response, which informs master device on error nature.
Exception Response
- it has two fields to distinguish it from normal response:
1. Function code field
2. Data field.
ad1 Function code field
In normal response of slave device, function code of original query corresponds to function’s code
of response. All function codes have most significant bit (MSB) equal to 0. In exception response
slave device sets most significant bit of function code to 1. Main station recognizes exception
response by means of this bit and can check data field for exception code.
ad2 Data field
Into exception response, transducer returns exception code in data field. Event causing exception is
determined this way.
Exception codes
0x01 Invalid function - Function code in query is not allowed action for transducer.
0x02 Invalid data address - Data address received in query is not allowed address for transducer.
Modbus CRC
Check sum of entire Modbus message are mostly automatically inserted to the end of request by
communication programs themselves. If you need generate the Modbus CRC into your program, the
way of calculation is as follows:
A procedure for generating a CRC is:
1. Load a 16–bit register with FFFF hex (all 1’s). Call this the CRC register.
2. Exclusive OR the first 8–bit byte of the message with the low–order byte of the 16–bit CRC
register, putting the result in the CRC register.
3. Shift the CRC register one bit to the right (toward the LSB), zero–filling the MSB. Extract
and examine the LSB.
4. (If the LSB was 0): Repeat Step 3 (another shift).
(If the LSB was 1): Exclusive OR the CRC register with the polynomial value 0xA001
(1010 0000 0000 0001).
5. Repeat Steps 3 and 4 until 8 shifts have been performed. When this is done, a complete 8–
bit byte will have been processed.
6. Repeat Steps 2 through 5 for the next 8–bit byte of the message. Continue doing this until all
bytes have been processed.
7. The final content of the CRC register is the CRC value.
8. During connection of check sum to the message lower Byte of CRC register is sent as first,
then upper Byte of CRC register.

14 IE-SNC-T43(4)11-02
Modbus registers of the transducer
Variable Unit Address Format Size Status
Measured temperature [°C] 0x0031 Int*10 BIN16 R
Address of transducer [-] 0x2001 Int BIN16 R/W*
Code of communication speed [-] 0x2002 Int BIN16 R/W*
Serial number of transducer Hi [-] 0x1035 BCD BIN16 R
Serial number of transducer Lo [-] 0x1036 BCD BIN16 R
Version of Firmware Hi [-] 0x3001 BCD BIN16 R
Version of Firmware Lo [-] 0x3002 BCD BIN16 R
Explanation:
•Int*10 register is in format integer*10
•R register is designed only for reading
•W* register is designed for write, detailed see description function 16 (0x10): Setting of
several 16-bit registers (Write Multiple Registers)
*In case there is a need for reading of measured values from transducer with higher resolution than
one decimal, measured values in transducer are stored also in „Float“ format, which is not directly
compatible with IEEE754.
Example of communication
In all examples communication with transducer at address 01h is supposed
Reading of temperature, address 0x0031
Modbus command:
transducer address: 01
reading of 16-bit registers 03
initial address Hi 00
initial address Lo 31
number read registers Hi 00
number read registers Lo 01
By link are physically sent: 01 03 00 30 00 01 84 05
Received response from transducer: 01 03 02 00 F4 B9 C3
transducer address: 01
reading of 16-bit registers 03
Number Byte 02
State of register Hi 00
State of register Lo F4 (0x00F4 = 244 = 24.4 °C)
Modbus CRC Lo B9
Modbus CRC Hi C3

IE-SNC-T43(4)11-02 15
Protocol compatible with Advantech-ADAM standard
Control units communicate on master-slave principle in half-duplex operation. Only master
can send requests and only addressed device responds. During sending request any of slave devices
should respond. Data is transferred in ASCII format (in characters) during the communication. Each
Byte is sent as two ASCII characters (value 0x2F is sent as pair of characters 0x32, 0x46, i.e.
characters „2“ and „F“). All commands and values MUST be entered in UPPERCASE only!
Transducer supports communication speed from 1200Bd to 115200Bd, parameters of
communication link are 1 start bit + eight bit data word (LSB first) + 1 stop bit, no parity.
Jumper
Jumper is located next to connection terminals. If communication protocol compatible with
standard Advantech-ADAM is selected, its function is the following:
•If jumper during switching ON the power is closed, transducer always communicates with
following parameters without regardless of setting, stored in transducer:
communication speed 9600 Bd, no check sum, transducer address 00h
•If jumper during switching ON the power is not closed, transducer communicates in
accordance with stored setting.
•If jumper is closed during transducer operation, transducer temporarily changes its address
to 00h, it will communicate in the same communication speed as before closing jumper and
will communicate without check sum. After jumper is opened setting of address and check
sum is restored in accordance with values stored in transducer.
•Communication speed and check sum are possible to change only if jumper is closed (see
chapter Configuration of transducer).
General syntax of commands
[distinguishing character][device address][command][data][check sum][CR]
Valid distinguishing characters towards to device are: $, #, %
Device address contents 2 ascii bytes in hexadecimal code (upper case letters) representing one
byte of binary address (e.g. „3“ „F“ corresponds to address 3Fh, i.e. 63, is sent as 0x33, 0x46)
Check sum: may be ON/OFF
CR ... 1 byte (0Dh)

16 IE-SNC-T43(4)11-02
Description of supported functions
Configuration of transducer
Syntax of command: %AANNTTCCFF cr
Meaning of symbols:
AA … current address of transducer 00…FF (hexadecimal)
NN … new address of transducer 00…FF (hexadecimal)
TT … code of transducer (2Bh… temperature transducer)
CC ... code of communication speed
Code speed [Bd]
03 1200
04 2400
05 4800
06 9600
07 19200
08 38400
09 57600
0A 115200
FF … data format and check sum:
D7 D6 D5 D4 D3 D2 D1 D0
xxxx xx00 format "Engineering units"
x0xx xx00 check sum switched OFF
x1xx xx00 check sum switched ON
•Communication speed and check sum are possible to change only, if jumper is closed
oChange in communication speed activates only after transducer power is switched
OFF and switched ON again.
oChange in setting of check sum activates immediately after jumper is opened
•If address is changing
oand jumper is closed, transducer responds with address 00h again, and newly set
address will be activated after jumper is opened.
oand jumper is not closed, change is activated immediately.
•If attempt occur to write incorrect data to the transducer (and syntax is correct), transducer
responds with error message.
Response of the transducer
1. If syntax of command is not correct, transducer does not respond at all (e.g. no check sum is
received though it is switched ON, check sum is not correct, string is not complete or
contents invalid character).
2. If syntax is correct, but required operation is not correct, transducer returns error message in
format
? AA cr
this state appears, if we try to change communication speed and check sum and jumper is
not closed.
3. If command is executed, transducer responds:
! AA cr
Check sum (CRC): it is the sum of all characters before it, its lowest byte is applied.
Reading of the temperature
Syntax command: #AA cr

IE-SNC-T43(4)11-02 17
Response: > (temperature) cr (e.g. >-012.30 cr)
Query to adjusted configuration
Syntax command: $AA2 cr
Response: !AATTCCFF cr symbols correspond with paragraph
"Configuration of transducer"
Reading of device name
Syntax command: $AAM cr
Response: !AAT4311 cr or !AAT4411 cr (accordingly with transducer
model)
Reading of firmware version
Syntax command: $AAF cr
Response: !AA(version) cr reads version number of transducer
firmware
Error states
>-0000 cr lower limit of temperature
>+9999 cr upper limit of temperature
Example 1: Change of transducer address during operation (without closed jumper, CRC switched
OFF)
Transducer, which had address 23h is configured to address 24h, speed 9600 Bd,
without CRC, setting of communication speed and CRC must not change (setting of
communication speed and CRC is not possible to change without closed jumper).
Command: %23242B0600 cr
Response: !24 cr
Example 2: Reading of temperature from transducer without closed jumper, address of transducer
01h, without check sum.
Command: #01 cr
Response: > +020.50 cr
with check sum:
Command: #01 84 cr
where it is sent: 23 30 31 38 34 0D
calculation of CRC: 23h+30h+31h = 84h, then CRC = 84h, it is sent as 0x38, 0x34
Response: >+020.50 8E cr
where it is sent: 3E 2B 30 32 30 2E 35 30 38 45 0D
calculation of CRC: 3Eh+2Bh+30h+32h+30h+2Eh+35h+30h=18Eh tedy CRC =
8Eh, then it is sent as 0x38, 0x45
Example 3: Setting of transducer to address 9F, communication speed remains 9600 Bd, check
sums are switched ON (jumper should be closed because setting of CRC will be
changed):
- with jumper, transducer always reports from address „00“ without CRC
Command: %009F2B0640 cr

18 IE-SNC-T43(4)11-02
Response: !00
After jumper is opened transducer address changes to 9Fh
Format of data
Transducer uses data format „Engineering units“, i.e. fixed decimal point. Temperature is
displayed with 2 digits behind decimal point, second digit behind decimal point is always zero.
General writing: „>±xxx.x0 cr“
Examples: >-050.20 cr >+000.00 cr >+025.80 cr
Error States of the transmitter
Transmitter continuously checks its state during operation. In case error is found LCD displays
corresponding error code:
Error 0
First line displays „Err0“.
CRC check sum Error of stored setting in transmitter memory. This error appears if writing
procedure to transmitter memory was not correct, if writing to other address than allowed,
optionally if damage of calibration data appeared. At this state transmitter does not measure and
calculate values. It is an serious error, contact the distributor of the instrument to fix.
Error 1
Measured value is over upper limit of allowed full scale range. There is a reading „Err1“ on LCD
display. Value read from the transmitter is +999,9.
This state appears in case of:
•Measured temperature is higher than approximately 600°C (i.e. high non-measurable
resistance of temperature sensor, probably opened circuit).
Check connection of measuring sensor.
Error 2
There is a reading „Err2“ on LCD display. Measured value is below lower limit of allowed full
scale range. Value read from the transmitter is -999,9.
This state appears in case of:
•Measured temperature is lower than approximately -210°C (i.e. low resistance of
temperature sensor, probably short circuit).
Check connection of measuring sensor.
Error 3
There is a reading „Err3“ on LCD display upper line.
Error of internal A/D converter appeared (converter does not respond, probably damage of A/D
converter). No measurement and calculations of values are proceed. It is a serious error, contact the
distributor of the instrument.
Readings on LCD display
°C
Reading next to this symbol is measured temperature or error state of value.

IE-SNC-T43(4)11-02 19
first left arrow
Is on if jumper is closed.
second left arrow
Is on if button is pressed.
Technical parameters of the instrument:
Measuring parameters:
Temperature probe: Pt1000/3850 ppm connected by shielded cable of maximum length 10m
Measuring temperature range: -200 to +600 °C (can be limited by applied temperature probe
model)
Resolution: 0.1 °C
Accuracy (without probe):
•±0.2 °C from -100 to +100 °C
•±0.2 % from reading over above range
Operating temperature range:
transducer -30 to +80 °C, external probe - depends on probe model.
At temperature over +70°C near transducer case LCD display should be switched OFF!
Storing conditions: temperature -40 to +80 °C, humidity 0 to 100 %RH (non condensing)
Recommended calibration interval: 2 years
Measuring interval and LCD display refresh: 0.5 s
Power: 9 to 30 V dc, maximum ripple 0.5 %
Protection: IP65

20 IE-SNC-T43(4)11-02
Appendix A
Connection of ELO E06D converter (RS232/RS485)
(optional accessory of the transmitter T4411)
The ELO E06D converter is an optional accessory for connection of transmitter/transmitters with
RS485 interface to the PC via serial port RS232. Connect connector marked RS232 directly to the
PC, connect power to connector marked RS485. Power voltage +6V DC from an external acdc
adapter connect to pin 9, 0V connect to pin 5. Also mutually connect pin 2and pin 7. Link RS485
is connected across pin 3 (A+) and pin 4 (B-).