TECSYSTEM SHANGHAI
INSTRUCTION MANUAL
NT579
STANDARD
DIGITAL
&
(24 Vdc)
TECSYSTEM SHANGHAI
3rd Floor, Block No.5, For-
ward High-tech Industrial
Park,
No.33, Fuhua Road,
Jiading District
SHANGHAI - CHINA
http://www.tecsystem.asia
Ｒ．１．４ ２０１５／０８／１０
NT579-NT579 RS485
TECSYSTEM SHANGHAI
INTRODUCTION
NT579 is a microprocessor electronic device designed to integrate the thermal control of resin-cast transformers .
The monitoring unit has separated and independent inputs and outputs:
3 3-wire Pt100 inputs for each winding (total 3 inputs)
2 relays for Alarm - Trip signalling
1 FAULT common relay (sensor fault, monitoring unit working anomaly)
1) NT579 TECHNICAL
SUPPLY
· Rated values: 18~36 Vdc
INPUTS (Figure 2 Page 11)
3 3-wire PT100 sensor inputs.
· Removable rear terminals
Input channels protected against
electromagnetic noises
COMMUNICATION ON DIGITAL OR
AD VERSION
· RS485 MODBUS RTU
OUTPUTS (Figure 2 Page 11)
2 relays ALARM-TRIP with 6A-250Vac
resistive contacts (cosΦ=1)
· 1 FAN output at 250Vac Max, 50/60
Hz (max current 12A with cosΦ=1)
· 1 alarm relay for sensor fault or
working anomaly (FAULT) with 6A-250Vac
resistive contacts (cosΦ=1)
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NT579-NT579 RS485
TECSYSTEM SHANGHAI
TESTS AND PERFORMANCES
Assembly in accordance with CE
rules
Protection against electrical noises
CEI-EN-61000-4-4
Dielectric strength 2500 V
alternating current for 1 minute from
power supply + fan output and
PT100 input + modbus output,
power supply + fan output and relays, PT100 input + modbus output
and relays
· Accuracy ± 1% full scale value, ± 1
digit @25°C
Ambient working temperature from -
20°C to +60°C
Humidity 90% no-condensing
Digital linearity of sensor signal
Sensor self-diagnosis
Program and reading resolution 1
digit
Frontal in polycarbonate IP54
Max. absorption 5VA
Data storage 10 years minimum
Option: protection treatment of
electronic part
DISPLAY AND DATA MANAGEMENT
Temperature display ( ° C
TEMPERATURE)
Selected channel and programming
parameter display (CHANNEL/
MESSAGES)
4 LED’s to show the display mode
(SCAN, AUTO, MAN, TMAX)
4 LED’s to show the state of the
alarms relevant to displayed channel
(FAULT, FAN, ALARM, TRIP)
1 LED for RS485 communication (only
for digitasl version)
· Temperature monitoring from 0°C to
200°C
2 alarm thresholds (alarm/trip)
2 ON-OFF thresholds for fan control
(fan)
Sensor diagnostic (Fcc-Foc-Fcd)
Data storage diagnostic (Ech)
Programming access through the front
key
Wrong programming automatic display
Maximum reached temperatures,
alarm storage and sensor fault.
Frontal alarm reset push button
· (*) Vibration test IEC 68-2-6
Amplitude ± 1 mm from 2Hz to
13.2Hz Acceleration ± 0.7G from
13.2Hz to 100Hz.
(*) Seismic test according to
IEEE 344-1.987
*Cross reference T154 for constructive analogy.
DIMENSIONS
162 x 82 mm depth 130 mm
(terminal boxes included)
Panel cut-out 152x76 mm
NT579-NT579 RS485
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TECSYSTEM SHANGHAI
2) MOUNTING OF NT579 MONITORING DEVICE
Make a hole in the panel sheet with dimensions 152 x 76 mm.
Firmly tighten the device with the enclosed fixing kit.
3) SUPPLY OF NT579 CONTROL DEVICE
NT579 has a power supply of 18~36Vdc 50-60 Hz
When the monitoring device is directly fed from secondary winding of the
transformer to be protected, it can be damaged by high-intensity overvoltages.
These problems occur if the main switch is connected without load.
Above mentioned problems are much more evident when the voltage 24
Vac voltage is directly taken from the transformer secondary bars and there
is a fixed capacitor battery to phase the transformer itself.
In case you have to replace an existing monitoring unit with a new
one, in order to guarantee its safe and correct working, you must replace the sensor/relay/supply connection terminals with the new terminals supplied, provided that they are of a brand different from the
previously mounted ones.
4) ELECTRICAL CONNECTIONS FOR ALARMS AND E VENTILATION
(FIGURE 2 PAGE 19)
Carry out the electrical connections on the removable rear terminals, after
having removed them from the meter.
All relays switch in OFF (as the unit turned off) and does not run any temperature control when you enter one of the following modes: display programming Vis, PRG programming, relay test
ALARM and TRIP relays switch only when the set temperature limits are exceeded.
FAULT relay (Fault) switches when the meter is fed, while gets deenergised and when:
data memory fault (Ech message)
measuring circuit broken (CAL message)
a fault occurs to Pt100 sensors (Fcc, Fcc or Fcd)
supply voltage is lacking
during the power on reset after the data programming of the unit (local
or via modbus) or after the exit from visualizing program mode.
FAN output can be used to switch ON/OFF the cooling fans of the transformer by setting the unit program (table N. 20 at page 10, steps from 6 to
11)
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NT579-NT579 RS485
TECSYSTEM SHANGHAI
Disconnect the power supply to the instrument before making any
electrical connections
The contact fault is a fault signal, must not be connected to the tripping circuit of the transformer
Is suggested protect the line of fans with a fuse appropriate for the
load to protect the unit
5) TEMPERATURE SENSOR CONNECTION
Each Pt100 temperature sensor has a white wire and two red wires (CEI 75.8
standards).
Figure 2 Page 11 shows the position inside the terminal box of the connection ca-
TECSYSTEM has designed an own special cable to transfer the measuring
signals, according to CEI standards, with all the protection requirements provided for : model CT-ES
bles to the monitoring device.
6) MEASURING SIGNAL TRANSFER
All the measuring signal transfer cables for Pt100 must absolutely:
be separated from the power ones
be made with shielded cables and twisted conductors
have at least 0,12 mm² section
be twisted if there is no screen
be firmly fixed inside the terminal boxes
have tinned or silvered conductors
All the “NT” series monitoring units have the sensor signal linearization, with a
max. error of 1% of full scale value.
The maximum length of the extension cables with 0,12 mm² is 50 m.
The maximum length of the PT100 cable, using wires of 1mm² section, is 500m
7) TEMPERATURE SENSOR DIAGNOSTIC
In case of breaking of a temperature sensor mounted on the machine to protect,
FAULT relay immediately switches with the relevant indication of the defective
sensor on the corresponding channel.
Fcc for short-circuited sensor or temperature below –15°C
Foc for interrupted sensor or temperature over 230°C
Fcd for rapid increasing of the reading (see note at page 18).
To remove the message and reset the Fault switching, it is necessary to verify
the Pt100 connections and, in case, replace the defective sensor.
If one channel is in FCD, the condition of ALARM and TRIP of that channel are
cleared
In case of FOC or FCC, the condition of FAN, ALARM and TRIP of the channel
are cleared.
NT579-NT579 RS485
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TECSYSTEM SHANGHAI
8) PROGRAMMED DATA DIAGNOSTIC
In case of breaking of the internal storage or corruption of the programmed data,
just after switching on, the Ech wording is displayed in the messages page with
the relevant reporting of the Fault contact.
In this case, the default setting is restored as in the Pag. 6 in the section “ECH
ERROR”
To remove the Ech wording, press RESET and run programming to insert the de-
sired values.
After the auto reboot of the unit verify the correct memory working; in case it is
damaged and the Ech wording is still displayed, please return the monitoring
unit to Tecsystem for repair).
9) MEASURING CIRCUIT DIAGNOSTIC
In case of breaking of the internal measuring circuit CAL wording is displayed in
the messages page with the relevant reporting of the Fault contact.
Please return the monitoring unit to Tecsystem for repair.
To remove the CAL wording, press RESET.
10) TEMPERATURE DIAGNOSTIC
If one of the temperature sensor detects a temperature higher than 1°C com-
pared to set value as alarm limit, after approximately 5 seconds ALARM relay
switches together with the turning on of ALARM LED if the channel is selected
on the CHANNEL display.
When the release temperature limit is passed, TRIP relay switches together with
the turning on of TRIP LED if the channel is selected on the CHANNEL display
As soon as the taken temperature return to equal or lower values than the set
limit for ALARM and TRIP relay switching, they de-energise with consequent
turning off of the relevant LED’s.
11) COOLING FAN CONTROL
NT579 monitoring unit, if opportunely programmed, can control ON-OFF of fans
accompanying the transformer, according to set temperatures.
12) FAN TEST
It is possible, through programming (HFn), impose that fans are activated for 5
minutes each “xxx” hours, regardless of column or room temperature values
(example: with HFn=001 fans are activated for 5 minutes each hour).
This function has the aim to periodically verify the working of the fans and their
control apparatus during long idle periods.
Loading “no” value this function is inhibited.
During the self-test of the fans, the LED fan is lit on all channels
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NT579-NT579 RS485
TECSYSTEM SHANGHAI
13) DISPLAY MODE
Pressing MODE key, the display mode is loaded:
SCAN: monitoring unit displays in scansion (each 2 seconds) all the acti-
vated channels
AUTO: monitoring unit automatically displays the hottest channel
MAN: channel temperature manual reading through cursor keys
T.MAX: monitoring unit displays the highest temperature reached by the sen-
sors and possible alarm, trip or fault situations occurred after the last reset.
Select channels with , reset values with RESET.
SCAN AND MAN MODE NOTES.
During the SCAN and MAN mode is possible read status message from CPU.
1) Run cPU: the unit is running correctly
2) Ech Err: the eeprom memory of the unit is corrupted or damaged
3) CAL Err: the measuring circuit of the unit is damaged
4) Pt Err: one or more PT100 sensors are not working well
In case of Err the fault relays will be de-energized.
Only the message can be delayed following the priority over indicated.
RUN CPU.
This message appear when the unit run normally without system errors
ECH ERROR.
Ech means that the statement containing the programming data is corrupted or
damaged. Pressing Reset will delete the message and loads the default values:
Alarm 90 ° C, 119 ° C Trip, yes Fan, Fan on 70 ° C, 60 ° c Fan off, Fcd no, no
HFN, Adr 1, Par eve , Bdr 19.2, 4.20 Out scan.
Reprogram the desired values and ensure that these are stored. In case of error
Ech permanent return the equipment to Tecsystem SH for repair..
CAL ERROR.
Cal error means that the measurement circuit of the control unit is not working
properly. The values measured by the sensors PT100 may be incorrect. Return
the equipment to Tecsystem SH for repair.
PT ERROR
This message appears when a sensor PT100 has one of the anomalies indicated in paragraph 7 page 5.
14) WORKING PROGRAM CONTROL
To check the programmed temperature values, shortly press PRG key. viS indication is displayed on the message display.
By repeatedly pressing PRG key, all the previously loaded values are rolled in
sequence.
During the programming mode the unit is not reading the temperature sensors.
After 1 minute of keyboard no-operation, display-programming procedure will be
automatically left.
NT579-NT579 RS485
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TECSYSTEM SHANGHAI
15) PROGRAM MODE CONTROL
To enter in programming mode to select the desired setting, press PRG key for
5 sec. Until PrG message appears on the message display.
Follows the step at pag.10 to program the unit.
During the programming mode the unit is not reading the temperature sensors.
After 1 minute of keyboard no-operation, display-programming procedure will be
automatically left without store the programmed values.
16) LAMP TEST
We suggest to regularly carry out monitoring unit LED test.
For this operation shortly press TEST key; all displays turn on for 2 seconds.
If one of the LED’s should not work, we kindly ask you to return the Monitor-
ing unit to
TECSYSTEM.
17) ALARM RELAY SILENCING
If you want to silence the ALARM signal press RESET key: relay de-energises
and LED ALARM, which was fixed, will start to blink.
Silence system is automatically disconnected when all the temperature goes under the ALARM threshold.
If there are errors ECH or FCD, these are reset in order of priority on the alarm
is acknowledged.
18) IMPORTANT NOTICE
Before carrying out the insulation test on the switchboard where the monitoring unit is mounted, you have to disconnect it from the mains in order
to avoid serious damages.
NOTES FOR REMOTE PROGRAMMING
Also in the remote programming via ModBus phase you must take into
consideration that the Alarm thresholds must be lower than the Trip thresholds and that the Fan-on thresholds must be higher than the Fan-off
thresholds.
In case you try to load these thresholds in a wrong way, NT579 monitoring
unit won’t proceed with the programming and data storage; therefore in
the coming readings you will read the data relevant to the previous programming's.
After having sent a writing request, the monitoring unit will require approxi-
mately 1’’ to store the data in eeprom and a few seconds to reboot; during
storage phase, ModBus module won’t be able to process further request.
If the programming request successfully concludes, the monitoring unit
automatically resets and loads the new loaded values.
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NT579-NT579 RS485
TECSYSTEM SHANGHAI
The temperature values below zero are displayed in the form of 2's complement
Channel logs can be read with code 3 from number 1 to number 18
WORKING NOTES
The modbus inside option allow to connect NT579 monitorning unit with a RS485
network
With MODBUS RTU protocol in order to read the data shown in the table at pag.
13 and write the parameters with RW note
MODBUS MAPPING STRUCTURE NOTES
The records modbus are divided into 2 main groups:
From 1 to 18 are present all the temperatures of each channel.
The display of data is carried out WORD 2's complement for the management of
the sign.
The HI byte of WORD represents the sign: 00 = sign +, FF sign The LO byte contains the data of temperature
From 41 to 53 are all the status registers and some registers programming.
In this case, there is no registration of the sign
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TECSYSTEM SHANGHAI
20) PROGRAMMING
N° PRESS EFFECT NOTES
Keep pressed PRG key until PrG
1 PRG/SET
2 PRG/SET
3
4 PRG/SET
5
6 PRG/SET FAN YES or NO appears
message appears on message dis-
play.
ALARM threshold for CH L1-L2-L3
appears
load desired threshold From 1 to 200°C
TRIP threshold for CH L1-L2-L3 ap-
pears
load desired threshold From 1 to 200°C
Push PRG to start the
programming of the unit
or ENTER to exit.
If FAN NO is selected
jump to point 14
7
8 PRG/SET
9
10 PRG/SET
11
12 PRG/SET display shows HFN
13
Select desired option Load yes or no
FAN ON threshold for CH L1-L2-L3
appears
load desired threshold
FAN OFF threshold for CH L1-L2-L3
appears
load desired threshold
Load desired number of hours no= disabled function
FAN turning on > FAN
turning off
FAN turning off < FAN
turning on
Fan cyclic test for 5 min-
utes each “n” hours
14 PRG/SET FCD threshold appears
10
NT579-NT579 RS485
Fault for temperature
fast increase (°C/sec)
TECSYSTEM SHANGHAI
N° PRESS EFFECT NOTES
15
PRG/SET ADR appears Unit Modbus address
16
17
PRG/SET BDR appears Modbus Baud rate
18
19
PRG/SET PAR appears Modbus parity bit
20
21
22
PRG/SET display shows END Programming end
Load desired value (see Page 10)
Load the desider modbus address From 1 to 255
Load the desider modbus baud rate From 2.4 to 38.4 baud
Load the desider modbus parity bit No, even or odd.
From “no” (excluded function) to 30 °
C/sec
Err: wrong programming
Loaded data storage and program-
23
ENT
ming exit
for values indicated by Err
message
PRG/SET Return to step 2
24
1) If pressing ENT it appears “ALL Err”, it means that TRIP is not
greater of ALARM.. Correct the data.
2) If pressing ENT it appears “FAn Err”, it means that FAN ON is not
greater of FAN OFF. Correct the data.
INTRODUCTION TO MODBUS INSIDE MODULE
MODBUS INSIDE option allows the data transfer on a RS485 network with
MODBUS RTU protocol.
WORKING NOTES
For a correct working of the module it is necessary to load RS485 network
set-up parameters: address, baud rate, parity bit.
Please refer to the programming steps from 16 to 21 shown on the table at
page 8.
The serial communication of the temperature control monitoring unit is active just when NT579 is in temperature control working mode in one of the
intended modes (Scan, Auto, Man and T.Max).
When other functions such as programming, programming display and relay test are activated, the ModBus communication is temporarily deactivated.
NT579-NT579 RS485
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TECSYSTEM SHANGHAI
DATA TRANSMISSION ON MODBUS NETWORK
The MODBUS INSIDE option allows to connect NT579 monitoring unit with
a RS485 network with Modbus RTU protocol in order to read and write the
data shown in the table MODBUS MAPPING at pag.13. The unit is always
in slave mode.
RS485 ELECTRICAL CONNECTIONS
As far as the signal cable to be used in order to ensure a proper network
working is concerned, we recommend to follow what laid down by EIA
RS485 standard which suggests to use a 24AWG duplex cable.
The duplex cable which connects all the units in RS485 could require the
activation of the 120 ohm termination on the last unit of the series.
Connect the duplex cable paying attention to polarities and lay the network
avoiding to make sharp bends or ring windings in order not to modify the
line impedance.
If necessary, also the GND terminal for grounding is available
DATA FRAME
The frame in asynchronous transmission is composed of: 1 start bit, 8 data
bits, 1 parity bit (even or odd, if the parity has been set) and 1 stop bit (2
stop bit if no parity is selected).
Admitted baud rates are: 2400, 4800, 9600, 19200 and 38400 b/s.
Where no otherwise specified, the word length (DATA) is of 16 bits.
19) FRONT PANEL
FIGURE 1
Messages Alarms
Display
12
Keyboard
Messages
NT579-NT579 RS485
Keyboard
TECSYSTEM SHANGHAI
DATA PACKET
A complete sequence of request/answer is composed as follows:
Master request.
SLAVE ADDRESS - 1 byte
FUNCTION CODE - 1 byte
DATA - variable, they depend by the function code
CRC - 2 bytes
Slave answer.
SLAVE ADDRESS - 1 byte
FUNCTION CODE - 1 byte
DATA - variable, they depend by the function code
CRC - 2 bytes
29) FUNCTION CODE
ModBus module supports the following function codes:
3
: - holding register reading
(10)
16
If ModBus receives a message and a CRC error is detected, no answer is
given.
30) CODE 3
Request:
Slave address, code 3
Point HI, Number of Point LO, Crc LO, Crc HI.
Answer:
Slave address, code 3
ERROR CODES (exception code)
In case of wrong request ModBus will answer with modified codes and codified
errors according to the following points:
1: - Non-supported function code
2: - Wrong data address
3: - Wrong data (for instance length)
4: -illegal data(for value)
: - multiple register writing
(10)
.
(10)
, Starting address HI, Starting address LO, Number of
(10)
, Byte count, Data HI, Data LO……., Crc LO, Crc HI.
(10)
NT579-NT579 RS485
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TECSYSTEM SHANGHAI
POLLING FREQUENCY
The max. time to give an answer to a calling never exceeds 1 second; therefore
we suggest not to use polling frequencies with lower duration.
CRC CALCULATION
This protocol includes 2 CRC-16 bytes in each transmission. The characteristic
polynomial (11000000000000101B) is used for the calculation and the result is
“hung” at the end of the package. The polynomial is used in the reverse order
with the most significant bit suppressed because useless for calculation.
PARAMETER DESCRIPTION
A - 16-bit register
AL - At low side
AH - At huigh side
i,j, - KWH METERS
(+) - EXCLUSIVE OR
Di - Frame data «i»th of the packet
N - number of byte of the packet excluded 2 belonging to CRC
G - Polynomial : 1010-0000-0000-0001
shr - right shift
ALGORITHM
1) 0xFFFF -> A
2) 0 -> i
3) 0 -> j
4) Di (+) AL -> AL
5) j +1 -> j
6) shr A
7) if carry then G (+) A -> A
8) if NOT j=8 then go to 5
9) i +1 -> i
10) if NOT i = N then go to 3
11) A -> in CRC (result is in the order L,H)
CODE 16
(10)
.
Request:
Slave address, code 16
, Starting address HI, Starting address LO, Num-
(10)
ber of Point HI, Number of Point LO, Byte count, Data HI, Data LO…….,
Crc LO, Crc HI.
The alarm thresholds (registers 3-4-5-6) are written only for channel L1
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NT579-NT579 RS485
TECSYSTEM SHANGHAI
Address
HI
(10)
0 1
0 2
0 3
R: read
W:write
Address
Data HI Data LO Note 1
LO
(10)
Note
RW:
2
read/
write
2’compl.
from –
2’compl.
sign
Ch L1 tem-
perature
20° to
230
R
2’compl.
2’compl.
sign
Ch L1
maximum
from 1°
to 220
R
temperature
2’compl.
Ch L1tem-
2’compl.
perature
sign
from 1°
to 220
RW
alarm set
point
0 4
0 5
0 6
0 7
2’compl.
sign
2’compl.
sign
2’compl.
sign
2’compl.
sign
2’compl.
Ch L1 tem-
perature
trip set
point
2’compl.
Ch L1 tem-
perature
Fan on set
point
2’compl.
Ch L1 tem-
perature
Fan off set
point
2’compl.
Ch L2 tem-
perature
from 1°
to 220
from 1°
to 220
from 1°
to 220
from –
20° to
230
RW
RW
RW
R
0 8
2’compl.
2’compl.
sign
Ch L2
Maximum
temperature
NT579-NT579 RS485
from 1°
to 220
R
15
TECSYSTEM SHANGHAI
MODBUS MAPPING
R: read
Address
HI
(10)
Address
LO
(10)
0 9
0 11 2’compl. sign
0 12 2’compl. sign
Data HI Data LO Note 1
2’compl. Ch
L2 tempera-
2’compl.
from 1°
ture
sign
to 220
alarm set
point
2’compl. Ch L2 tem-
perature
Fan on set point
2’compl. Ch L2 tem-
perature
Fan off set point
from 1° to 220
from 1° to 220
Note
2
W:write
RW:
read/
write
R
R
R
0 13 2’compl. sign
0 14 2’compl. sign
0 15 2’compl. sign
0 16
0 17
2’compl. sign
2’compl. sign
2’compl. Ch L3 tem-
perature
2’compl. Ch L3
maximum tempera-
ture
2’compl. Ch L3 tem-
perature
alarm set point
2’compl. Ch L3 tem-
perature
trip set point
2’compl. Ch L3
temperature
Fan on set point
from –20° to
230
from 1° to 220
from 1° to 220
from 1° to 220
from 1° to
220
R
R
R
R
R
16
NT579-NT579 RS485
TECSYSTEM SHANGHAI
R: read
Address HI
0 18 2’compl. sign
0 41 0 CPU Status Controller status
0 42 0 Ch L1 status
0 43 0 Ch L2 status
Address LO
(10)
(10)
Data HI Data LO Note 1 Note 2
2’compl. Ch L3
temperature
Fan off set point
from 1° to 220
channel L1
Status
channel L2
Status
See CPU status
See CHn status
See CHn status
note
note
note
W:write
RW: read/write
R
R
R
R
0 44 0 Ch L3 status
0 45 0 Ch L1 story
0 46 0 Ch L2 story
0 47 0 Ch L3 story
0 48 0 HFN
channel L3
Status
channel L1
Alarm history
channel L2
Alarm history
channel L3
Alarm history
setting fan test
cycle (hours)
See CHn status
note
See CHn story
note
See CHn story
note
See CHn story
note
0=No test
1~200h
R
R
R
R
RW
0 49 0 FCD
NT579-NT579 RS485
detector tem-
perature incre-
ment fast
0=No FCD
1~30°/sec
RW
17
TECSYSTEM SHANGHAI
Address HI
0 51 0 Address Modbus address 1~255 R
Address LO
(10)
(10)
Data HI Data LO Note 1 Note 2
R: read
W:write
RW: read/write
0=2400 Baud
1=4800 Baud
0 52 0 Bdr
0 53 0 Parity
Modbus baud
rate
Modbus parity
bit
2=9600 Baud
3=19200 Baud
4=38400 Baud
0=No Parity
1=even Parity
2=odd Parity
R
R
CPU STATUS
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Not used Not used Not used Not used PT Fault V_rif Fault FCD Fault E2P Error
CH L1-L2-L3 STATUS
CH A-b-c STATUS
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Not used TRIP ALARM Not used FAN FCD FOC FCC
CH L1-L2-L3 STORY
CH A-b-c STORY
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Not used TRIP ALARM Not used Not used Not used FOC FCC
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NT579-NT579 RS485
TECSYSTEM SHANGHAI
FAULT DIAGNOSTIC
Monitoring unit doesn’t turn on, even if
the terminals are fed.
One of the three/four channels is in
FAULT for FOC/FCC
When turning on, “ECH” indication ap-
pears
CAUSES AND REMEDIES
Connector not well placed inside its
seat. Connection cables are not tightened in the terminal. Burnt out feeder.
Take out and give supply again.
Check the polarity of the power connec-
tion (Page 21 power supply)
Check Pt100 sensor connections.
Possible defective sensor.
Replace the damaged sensor.
A strong disturbance damaged the
stored dataplease refer paragraph 8.
If this problem should persist, please
contact TECSYSTEM SH Technical De-
partment.
All the Pt100 sensor are in FCC.
All the Pt100 sensor are in FOC.
Temperature indicated by one or more
channels is wrong.
Sudden trip of the main switch. Temperature is on standard levels. Just one
channel caused the trip.
Wrong sensor connections. Terminal
box connected inside out.
Check connections and terminal box.
The temperature of the sensors is un-
der –15°C.
Wrong sensor connections. Terminal
box connected inside out.
Check connections and terminal box.
The temperature of the sensors is over
230°C.
Contact TECSYSTEM SH Technical
Department
Verify through T.MAX function possible
defective sensors.
Replace the sensor. Check the measuring signal terminal box.
NT579-NT579 RS485
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TECSYSTEM SHANGHAI
21) NOTES ABOUT FCD FUNCTION
NT device series have an innovative control function combined with the
Pt100 sensor dynamic state.
If a temperature sensor should accidentally break down, the defect turns out
with a fast increase of its resistance and therefore of the temperature
registered by the monitoring unit.
It is obvious that this increase is not consequential to the increase of power
of the machine to be protected, whether it is a motor or a dry or
encapsulated transformer.
Therefore it is advisable to discriminate the state of the sensor and report a
Fault notification rather than an Alarm or, worse, a Trip signal.
In case of temperature control for electrical motors, the fast increase of the
temperature could be the consequence of the working with jammed rotor
and not of defective sensor; in this case the Fault relay, once energised,
makes evident this anomalous condition for the motor working.
By activating the FCD function it is possible to have on 54-55 contacts a
Fault signal when the temperature registered by a Pt100 increases with a
speed higher than “n” °C/sec (loadable from 1 to 30).
Depending on the loaded value, you can have a different sensitivity, which
can be useful for various applications:
-from 1 to 10: high sensitivity, for instance useful to immediately report a
jammed rotor in a motor.
-from 10 to 20: medium sensitivity, useful to have indications for possible
noises which affect the sensor reading, connection problems or defective
sensors.
-from 20 to 30: low sensitivity, useful for applications where an higher
sensitivity could give rise to faults for undesired FCD.
- loading “no”, FCD function is disabled.
When a channel is in Fault condition for FCD, relevant Alarm and trip
signalling are inhibited in order to just report the anomaly for too fast
increase of the temperature.
Press Reset to cancel the FCD signalling of all the channels and restore the
fault relay.
20
NT579-NT579 RS485
TECSYSTEM SHANGHAI
22) ELECTRICAL CONNECTIONS
PT100 INPUTS
FIG.2
WHITE
1 2 3
CH L1
4 5 6
CH L2
RELAYS CONNECTION
ＮＯＴＥ： ｗｈｅｎ ｔｈｅ ｕｎｉｔ ｉｓ ｐｏｗｅｒｅｄ ｔｈｅ ｆａｕｌｔ ｒｅｌａｙ ５４－５５ ｏｐｅｎｓ ａｎｄ ｉｔ ｃｌｏｓｅｓ ａｇａｉｎ ｉｎ ｃａｓｅ ｏｆ ｆａｕｌｔ ｃｏｎｄｉｔｉｏｎ ｏｒ ｎｏ ｐｏｗｅｒ．
7 8 9
CH L3
RELAYS
RED
RED
Relay fan
contact
ON/OFF
50 51
ALARM
52 53
TRIP
54 55
FAULT
56 57
FAN
POWER SUPPLY
+
-
18~36 Vdc
BE CAREFUL TO CONNECT THE POWER
SUPPLY WITH THE RIGHT POLARITY
41 42
RS485 DIGITAL OUTPUT
+
62 61 60
-
Gnd
REAR PANEL
NT579-NT579 RS485
21
TECSYSTEM SHANGHAI
23) RULES FOR WARRANTY
The Product purchased is covered by manufacturer's warranty or the
seller's terms and conditions set forth in the "General Conditions of Sale
Tecsystem SHANGHAI", available at www.tecsystem.asia and / or purchase
agreement.
The warranty is considered valid only when the product will be damaged by
causes attributable to TECSYSTEM SHANGHAI, such as manufacturing or
components defects.
The warranty is invalid if the Product proves tampered / modified, incorrectly
connected, because voltages outside the limits, non-compliance with the
technical data for use and assembly, as described in this instruction
manual.
Any action about warranty is always at our factory in SHANGHAI JIADING,
CHINA as stated by the
" General Conditions of Sale Tecsystem SHANGHAI ".
RAEE: This SYMBOL, shown on the unit, indicates that the
waste must be subject to "separate collection”. The end-user must
send the unit to the “waste collection centers”, or return the unit to
the dealer against the purchase of a new equivalent device.
22
NT579-NT579 RS485
TECSYSTEM SHANGHAI
NT579-NT579 RS485
23
TECSYSTEM SHANGHAI
24
NT579-NT579 RS485
TECSYSTEM SHANGHAI
使用手册
系列 NT579
STANDARD
DIGITAL
(24 Vdc)
&
中国上海市嘉定区复华路33号5幢B区三层
邮编：201818
电话: +862139905855/56/57-118
传真: +862139905859
http://www.tecsystem.asia
Ｒ．１．２ ２０１５／０８／１０
NT579-NT579 RS485 智能温控器
TECSYSTEM SHANGHAI
1）技术规范
电源供应
• 额定电压范围：18~36 Vdc
输入
• 3路三线制RTD PT100输入
• 可拆卸式接线端子，方便接线
• 输入通道具有防电磁干扰和电压闪变干扰功能
通信
·RS485 MODBUS RTU
输出
• 2 级报警输出（高温报警-跳闸）
• 1 路故障FAULT输出
• 每个报警继电输出触点容量：5A-250Vac
• 1路风机启、停无源控制输出，容量为12A, 250Vac (cos Φ=1)
• 1路RS485数字输出（NT579dig）
测试以及性能
• 按照CE规范的要求进行组装
•抗电噪声干扰符合CEI-EN-61000-4-4
•温控器绝缘强度不低于2.5kVac：变送器和电源之间,变送器和传感器之
间和电源和传感线之间的绝缘强度均为2.5kVac,历时1分钟
•精度为± 1%,分辨率± 1°C
•操作温度为：-20 °C 至 +60°C
• 非露点湿度为90%
• 前面板为聚碳酸酯材料，IP54防护等级
2
NT579-NT579 RS485 智能温控器
TECSYSTEM SHANGHAI
• 最大功耗为5VA
• 数据至少可以储存10年
•数码化线性函数测量信号
• 带有传感器自检功能
•可以选择电路板特殊防护处理。
•震动测试符合IEC 68-2-6
振幅±1mm，频率从2Hz到13.2Hz
加速的±0.7g,频率从13.2Hz 到100Hz
•抗震测试符合IEEE 344-1.987标准要求
显示及数据管理
•温度显示（单位：°C ）
•所选择通道和编程显示（通道类别和信息）
• 4个LED用于显示当前温控器的显示模式
(自动循环，最高温度，手动设置和黑盒子四种显示模式)
•4个LED显示对应的输出报警状态（高温，跳闸，故障和风机启动）
•1个LED用于RS485通讯工作显示（NT579dig）
• 温度监控范围0°C 至200°C
• 可对通道CHL1-L2-L3进行（高温报警ALARM和跳闸TRIP）两级报警
设定
•可自行设定风机启动/停止的温度门槛值
• 传感器自检功能：
Fcc 报警：传感器短路
Foc 报警：传感器开路
• 数据存储诊断（Ech）
• 通过面板按键方便的进行编程操作
•编程错误自动显示（Err）
• 带有清除报警操作面板按键
尺寸
• 162 x 82 mm-高度130mm（包括接线端子）
• 嵌装开口尺寸：152 x 76 mm
NT579-NT579 RS485智能温控器
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TECSYSTEM SHANGHAI
2)安装
嵌装开口尺寸为152×76mm
用附带的紧固件进行仪表锁紧。
3) 电源供应
NT579仪表特点为内置有高频开关通用电源模块，可适用电压范
围:18~36Vdc
注意：当温控器从变压器二次回路直接供电时，可能会被变压器的
电压瞬变所损坏，
特别是变压器空载的时候，尤其容易发生此类故障。
如果用户由于某种原因，需要更换温控器，用户必须将所有的接线端子
连同温控器一起更换为新的。以防止，原来的接线端子不匹配造成连
接不良。
4）有关风机控制与报警输出端子的连接
首先将可拆卸接线端子从设备上拆下，然后在其上进行接线操作。
只有当达到设置的温度门槛值时，报警和跳闸输出触点才会发生触发。
FAULT 继电触点只在仪表出现故障的情况下触发，例如PT100传感器故
障，数据内存故障，供电电压缺陷，仪表校验故障。
当仪表处于编程状态、编程查看模式或继电器测试状态时，所有的输出
继电器均处于关闭状态（仪表无电状态）
FAN控制触点可用于变压器冷却风机的启停控制,无源，仅开关量。
请断开电源后，进行所有连接，FAULT故障报警继电输出，是针对温度
监控系统本身的故障或环境干扰造成的报警，一定注意不能连接到
变压器的跳闸控制线路上。
4
建议在风机和温控器的连接线路上，根据实际的负载，加装一个电容保
护。
NT579-NT579 RS485 智能温控器
TECSYSTEM SHANGHAI
5）温度传感器连接
每个Pt 100温度传感器都具有一条白色线和两条红色线（符合CEI 75.8标
准）。
第23页的图2显示了具体的接线位置。
6）测量信号传输
所有测量所用的Pt100的传输电缆都必须严格符合如下要求：
• 与电源供应线分隔
• 导线必须为屏蔽和互绞设计
• 至少具有0.12 mm²的横截面
• 如不带屏蔽也必须要互绞设计
• 导线和接线端子排必须要紧固连接
• 导线末端必须加焊锡或套上镀银端子
所有的“NT”系列温控器均采用线性函数信号计量方法，整个检测范围
内
TECSYSTEM S.r.l.公司按照CEI标准的规定设计了一种专用信号传输电
缆，可以防止各种干扰。其型号为：CT-ES
7）温度传感器诊断
一旦安装在被保护设备上的温度传感器发生损坏，故障（FAULT）继电
器则会立即闭合，并且在显示屏上显示相关故障通道。
• Fcc为传感器短路或者检测到温度低于-15°C
• Foc为传感器开路
• Fcd 异常温升报警功能（请看第22页的注解）
如果要清除错误信息和故障（FAULT）报警状态进行重新设置之前，用
户必须确保故障传感器已经修复或者更换。如果发生FCD,FCC或Foc
报警，用户无需过分紧张这个不会造成对变压器的误动作。
NT579-NT579 RS485 智能温控器
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TECSYSTEM SHANGHAI
8) 编程数据诊断
一旦内存数据发生缺陷或者编程数据损坏，那么温控器经相应的故障通
过显示屏显示Ech字符，对应有Fault故障报警输出。
在这种情况下，为确保安全，温控器将会自动恢复并加载出厂预设门槛
值如下：
ALARM报警 通道 ChL1-L2-L3= 90°C，
TRIP跳闸 通道 ChL1-L2-L3=119°C，
Ch-Fan=L1-L2-L3，Fan—on（冷却风机开启）=70°C，Fan-off（冷却风
机关闭）=60°C，
HFn（风机自检时间）=000，FCD=no, Adr=1,Par=eve, Bdr=19.2, 4.20输
出为SCAN模式。
通过按下RESET键来消除Ech报警显示，并且运行编程以输入所需值。
设定好之后，按下TEST键进行程序测试；如果Ech报警仍然出现，则说
明仪表硬件故障，需将仪表返回TECSYSTEM公司或当地代理进行维
修。
9)测量线路自检
如果温控器内部测量线路损坏或突发问题，仪表通电后将会显示
CAL字符，并输出Fault故障报警，可通过PRESS按键消除此报警。
此时请将此仪表返回TECSYSTEM公司检修。
10）温度诊断
ALARM 高温报警触发只有在温度传感器所探测到温度高出设定报警温
度1°C或以上，并持续5秒钟或以上的情况下，才会触发报警同时亮
起通道LED 告警灯（CHn）。
TRIP 跳闸报警触发只有在温度传感器所探测到温度高出设定跳闸报警
6
温度，才会触发报警同时亮起通道LED 告警灯（CHn）。当温度回
降到ALARM高温报警和TRIP跳闸报警的预设的温度或以下时，相应
的报警输出终止，对应的LED报警灯将自行关闭。
NT579-NT579 RS485 智能温控器
TECSYSTEM SHANGHAI
11) 冷却风机控制
NT579系列温控器可以通过灵活编程对冷却风机启/停控制
12) 风扇测试
我们可以通过HFn数值设定，使风机按设顶的时间（单位小时）进行5
分钟的自检运行（例如，当HFn=001时，则每小时风机自检运行5分
钟）。
此功能目的在于通过定时运行风机避免因风机长时间闲置而发生意外故
13) 显示模式
通过按MODE功能按键选择如下显示模式：：
• SCAN：自动对各个通道进行巡检显示（每2秒钟顺序更换显示通道）
• AUTO：自动显示温度最高的通道
• MAN：通过 键手动选择显示通道
• T.MAX：俗称“黑盒子”功能，可以用 按键查看各通道曾经出现
过的历史最高温报警状态。
用 按键来选择通道，注意：按RESET键该历史记录将被删除
在SCAN 和 MAN 模式时注意：
在这两种模式下，有可能会从CPU读到如下信息;
1 、 Run Cpu: 表示温控器正常运转
2、 Ech Err : 存储器损坏或错误
3、 CAL Err: 温控器的测量线路损坏
4、 Pt Err : 一条或多条Pt100 传感器工作不正常
14) 查看程序设定值
如果要查看已编程门槛值，则短按PRG键。这时“Vis”显示将会出现2
秒钟以后，便开始进入编程查看模式。每按一次PRG按键，相关功
能设定门槛值将顺序显示。
如需终止查看模式，则按下ENT键；或当键盘一分钟无任何操作后，自
动终止查看模式。
15)编程模式进入
如果进入编程操作进行数据设定，则持续按PRG键约5秒，直到
“PRG”显示后，便开始进入编程查看模式，依据本规范的第20项的编
程操作指导进行。编程过程中，温控器不读取任何温度数值。当键盘
NT579-NT579 RS485 智能温控器
7
TECSYSTEM SHANGHAI
16）灯光测试
建议定期执行LED报警指示灯测试。
如果要进行测试，则应当短按TEST键；这时所有的显示灯将会被亮起2
如果其中一个LED灯不工作，需将仪表返回TECSYSTEM公司或当地代
理公司进行维修（LED灯用户无法进行现场维修更换，需要整机返回工
厂维修）。
17）取消报警触点的功能输出
如果您取消报警触点的功能输出，请按下RESET键：触点将自行断开，
但LED告警灯仍将继续闪烁，只有当相应的温度回降到设定的报警温
度以下时，LED报警指示灯自动熄灭。
18）重要提示
当用户对变压器进行耐压或绝缘测试时，必须断开温控器的各种连接，
19）面板信息
图示1
报警信息
温度及报警
信息显示屏
显示模式
8
操作按键 显示屏 操作按键
NT579-NT579 RS485 智能温控器
TECSYSTEM SHANGHAI
20 ) 编程
项目 操作按键 操作内容 备 注
1 PRG/SET
2 PRG/SET
3
4 PRG/SET
5
6 PRG/SET
7
按PRG按键约持续5秒直到
屏幕显示PRG字符
显示高温报警温度门槛值
按此上下选择按键用于调整
所需门槛值
续按此功能键,显示通道CH
L1-L2-L3的挑闸TRIP门限值
按此上下选择按键用于调整
所需门槛值
续按此功能键，显示FAN
YES 或NO 字符
续按此功能键可选择YES或
NO状态
按PRG按键进入编程，或按
ENTER按键退出编程
可设定范围从1~200°C
可设定范围从1~200°C
如果选择NO，请转至第14步
骤操作
8
9
10
11
12
13
PRG/SET
PRG/SET
PRG/SET
续按此功能键，显示出厂时
设定的启动风机门槛值
按此上下选择按键用于调整
风机启动所需温度值
续按此功能按键，显示风机
启动温度必须大于下边设定的
风机关闭温度
关闭温度值
按此上下选择按键用于调整
风机停止所需温度门槛值
续按此功能按键，显示HFn
字样，进入风机自检设定模
续按此功能按键，设置风机
停止温度必须小于上边设定的
风机启动温度
每“n”小时风机自检运行5分
钟。
no表示禁止该自检功能
自检运行的间隔时间（每
***小时）
NT579-NT579 RS485 智能温控器
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TECSYSTEM SHANGHAI
14
15
16
17
18
19
20
21
22
23
PRG/SET
PRG/SET
PRG/SET
PRG/SET
PRG/SET
ENT
续按此功能按键，显示
FCD<>“出厂设置门槛值”
FCD 是排除误报警功能（因
传感器接触不良,电磁干扰或
开路故障所引发的不正常的温
升率（°C/秒）来作判定）
按此上下选择按键用于调整所需
门槛值（参考第22页说明）
从“no”至最高为30°C/秒
（no：禁止该功能）
续按此功能按键，显示ADR 温控器Modbus通讯地址，
16~21步只是针对带通讯功能
续按此功能按键，设定地址 从1到255
续按此功能按键，显示BDR字符 通讯的波特率
设定波特率 从2.4到38.4
按此键，显示PAR字符 Modbus 字符的奇偶校验
按此键设定 可选择No,even,odd
按此键，END字符显示
按此键，保存设置，退出编程 如此时出现Err字符，代表前面
的编程错误，重新返回第2步
操作
1）如果按ENT按键结束编程后，屏幕显示ALL Err字符，则表示编程
中跳闸报警温度低于高温报警的温度，请去相关步骤做修改。
内置MODBUS模块介绍
这种内置MODBUS扩充模块内置在NT579温控中，它可以通过
ModBus RTU协议向RS485网络传输数据。
10
NT579-NT579 RS485 智能温控器
TECSYSTEM SHANGHAI
工作注意事项
为了使模块正常工作，必须通过编程设定地址，波特速率和奇偶性校
验。
请参阅第20项编程中的第16~21步骤。
温度控制装置之间的串行通信只有当NT579温控处于已知模式中
(Scan, Auto, Man eT.Max)的温度控制工作模式中才被激活。
当其他功能，如编程，编程显示和继电测试被激活时，则扩充模块
MODBUS网络数据传输
内置ModBus功能，使NT579温控器通过Modbus RTU协议连接到
RS485 Modbus通讯网路上，用户可以读取和写入第17-18-19-20项中
Modbus通讯报文表中的相关内容和数据。温控器始终处于从属通讯模
RS485 Modbus接线:
为了所使用的信号电缆能够确保网络的正常工作，我们建议按EIA
RS485标准所建议使用的24AWG回线。
用于连接所有温控器于RS485通讯的线缆，在最后一个温控器的连
接末端，最好激活120欧姆终止端。
RS485通讯连接线，接线时须考虑极性并平放，以避免产生锐弯和
环状绕圈。
如有必要，也可以使用GND端子接地。
帧数据
异步传输帧由1个起始位、8个数据位和1个奇偶性校验位（偶数或奇
数，如奇偶性校验位已加载）和1个停止位构成。
适合的特速率：2400，4800，9600 ， 19200和38400。
如没有特别规定，则字长（数据）为16比特。
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数据包
一个完整的请求/应答序列由下列各项构成：
主请求：
从属地址 -1 比特
功能编码 -1 比特
数据 -变量，取决于功能编码
循环冗余校验 -2 比特
从属请求：
从属地址 -1 比特
功能编码 -1 比特
数据 -变量，取决于功能编码
循环冗余校验 -2 比特
功能编码
ModBus 模块支持下列功能编码：
3（10）： -保持寄存器读取
16（10）： -复式寄存器写入
如果ModBus收到一个信息并且检测到一个循环冗余校验错误，则不
应答。
3（10）编码
12
请求：
从属地址、3（10）编码、HI启动地址、LO启动地址、HI点数和LO,
Crc LO和Crc HI点数。
应答：
从属地址、3（10）编码、字节计数、HI数据、LO数据……., Crc LO
和Crc HI。
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错误码（异常码）
如果遇到错误请求，MODBus将做出答复并提供下列修改的编码和编
码错误：
1： - 无支持功能编码
2: - 错误数据地址
3： -错误数据（比如长度）
轮询频率
回答一个呼叫时限不得超过1秒；因此我们建议在较低的持续时间时
不要使用轮询频率。
CRC运算
对每个数据传输，本协议包括2个比特CRC-16。运算采用特征多项式
（11000000000000101B)并且其结果为处于信息包末端的«hung»。多项式
采用倒序方式并且压缩最重要的比特，因为其在运算中不是很有用。
参数描述
A-16比特寄存器
AL-在低侧
AH-在高侧
i,j,- KWH计算
(+) –异或
Di-信息包中的帧数据«i»
N- 属于CRC的紫字符信息包中的 比特数，不包括2
G-多项式：1010-0000-0000-0001
Shr-右移位
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算法
1）0xFFFF-＞A
2) 0-＞i
3) 0-＞j
4) Di(+)AL-＞AL
5) j+1-＞j
6) shr A
7) if carry then G(+) A-＞A
8) if NOT j=8 then go to 5
9) i+1-＞i
10) if NOT i=N then go to 3
11) A-＞in CRC (result is in the order L,H)
16
（10）
编码
请求：
从属地址、16（10）编码、HI启动地址、LO启动地址、HI点数、LO
点数、字节计数、HI数据、LO数据……., Crc LO和Crc HI。
应答：
从属地址、16（10）编码、HI启动地址、LO启动地址、HI点数和LO,
Crc LO和Crc HI点数。
报警门槛值（寄存器3-4-5-6）仅仅被写入通道1，并自动复制到第2和第3
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远程编程注意事项：
即使通过ModBus对温控器远程编程，您必须注意Alarm门限应低于
Trip门限，Fan-on门限必须低于Fan-off门限。
如果您错误地设置了这些门限，则NT579温控器，将不能继续数据编
程和储存；接下来读数时，读到的数据是原来编程所对应的数据。
当发送了一个写入请求后，监视器会用大约1秒钟的时间将它储存在
可擦除只读储器中，然后需要几秒钟重启；在储存阶段，ModBus将不再
处理其它的请求。
如果当前写入请求成功，温控器将自动复位并进入下一步新的编程
数据设定。
负的温度数值将会以2个字节加以显示负数。（FF代表负数）
各个通道的记录可通过编码3查看，从地址1到地址18（Modbus报
文表中）
工作注意事项：
选择Modbus inside 功能，NT579温控器可以通过MODBUS RTU协议
与RS485网络连接，通过读写注解，读取和写入报文表中相应的参数。
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Modbus 报文表结构说明：
Modbus 通讯规约记录表被分成2大部分：
从地址1到地址18，是所有通道的关于温度的内容信息
数据显示中2个高位字符 是用于正、负区分 管理的
地址的高字节：00 代表+,FF代表 -
地址的低字节代表温度数值
从地址41到53是所有关于报警、控制信息等方面的内容
在这些里面，寄存器中就不会出现正负的情况了，
寄存器地址高字节数值永远是0
地址的低字节是数据
如果目录中的操作形式不符合上述两部分内容的形式，控制系统中就
会出现异常乱码。
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如下是Modbus 规约
Address HI
0 1 2’compl. sign
0 2 2’compl. sign
0 3 2’compl. sign
0 4 2’compl. sign
(10)
Address LO
(10)
R: read
Data HI Data LO Note 1 Note 2
2’compl. Ch L1
from –20°
temperature
to 230
W:write
RW: read/write
R
2’compl. Ch L1
from 1° to
maximum
R
220
temperature
2’compl. Ch L1
from 1° to
temperature
RW
220
alarm set point
2’compl. Ch L1
from 1° to
temperature
RW
220
trip set point
0 5 2’compl. sign
0 6 2’compl. sign
0 7 2’compl. sign
0 8 2’compl. sign
0 9 2’compl. sign
2’compl. Ch L1
temperature
Fan on set point
2’compl. Ch L1
temperature
Fan off set point
2’compl. Ch L2
temperature
2’compl. Ch L2
Maximum
temperature
2’compl. Ch L2
temperature
alarm set point
from 1° to
220
from 1° to
220
from –20°
to 230
from 1° to
220
from 1° to
220
RW
RW
R
R
R
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ddress HI
0 11 2’compl. sign
0 12 2’compl. sign
0 13
0 14
0 15
Address LO
(10)
(10)
Data HI Data LO Note 1 Note 2
2’compl. sign
2’compl. sign
2’compl. sign
2’compl. Ch L2
temperature
Fan on set point
2’compl. Ch L2
temperature
Fan off set
point
2’compl. Ch L3
temperature
2’compl. Ch
cL3 maximum
temperature
2’compl. Ch L3
temperature
alarm set point
from 1° to 220
from 1° to 220
from –20° to
230
from 1° to 220
from 1° to 220
R: read
W:write
RW: read/write
R
R
R
R
R
0 16
0 17
2’compl. sign
2’compl. sign
2’compl. Ch L3
temperature
trip set point
2’compl. Ch L3
temperature
Fan on set point
from 1° to 220
from 1° to 220
R
R
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R: read
Address HI
(10)
Address LO
(10)
Data HI Data LO Note 1 Note 2
2’compl. Ch L3
0 18 2’compl. sign
0 41 0 CPU Status
0 42 0 Ch L1 status
0 43 0 Ch L2 status
temperature
Fan off set
point
from 1° to 220
Controller
status
channel L1
Status
channel L2
Status
See CPU status
note
See CHn status
note
See CHn status
note
W:write
RW: read/write
R
R
R
R
0 44 0 Ch L3 status
0 45 0 Ch L1 story
0 46 0 Ch L2 story
0 47 0 Ch L3 story
0 48 0 HFN
channel L3
Status
channel L1
Alarm history
channel L2
Alarm history
channel L3
Alarm history
setting fan test
cycle (hours)
See CHn status
note
See CHn story
note
See CHn story
note
See CHn story
note
0=No test
1÷200h
R
R
R
R
RW
0 49 0 FCD
NT579-NT579 RS485 智能温控器
detector tem-
perature incre-
ment fast
0=No FCD
1÷30°/sec
RW
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Address HI
(10)
Address LO
(10)
Data HI Data LO Note 1 Note 2
R: read
W:write
RW: read/write
0 51 0 Address
Modbus ad-
dress
1~255 R
0=2400 Baud
1=4800 Baud
0 52 0 Bdr
Modbus baud
rate
2=9600 Baud
R
3=19200 Baud
4=38400 Baud
0=No Parity
1=even Parity
2=odd Parity
R
0 53 0 Parity
Modbus parity
bit
CPU STATUS
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Not used Not used Not used Not used PT Fault V_rif Fault FCD Fault E2P Error
CH L1-L2-L3 STATUS
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Not used TRIP ALARM Not used FAN FCD FOC FCC
CH L1-L2-L3 STORY
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Not used TRIP ALARM Not used Not used Not used FOC FCC
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故障诊断：
故障诊断 原因以及纠正措施
接线端子排没有正确插进到位或接线端子上
的电源线没有拧紧或电源线烧断。
即使有电源供应与连接的情况下，仪表仍然
无法启动。
CH L1-L2-L3三通道处于FOC/FCC故障
当启动时，显示“ECH”错误信息
所有的通道均处于FCC（短路）传感器报警
检查电源的接线正负极性是否正确（详见23
页）
措施：先取下检查，并重新安装。
检查Pt100传感器的连接。可能传感器接线
不良或损坏。
措施：检查或更换已损坏的传感器。
由于强干扰导致内存数据损坏或缺陷。
请参阅本规范的第9条说明。如果此问题仍
然存在，请与TECSYSTEM S.r.l.公司技术部
门取得联系。
传感器接线端子排接线错误或端子内短路。
状态
所有的通道均处于FOC（开路）传感器报警
状态
一个或多个通道错误温度显示
跳闸（TRIP）触点触发，但温度处 于 正 常
水平。
或者传感器探头所处的温度低于-15°C.
传感器接线连接不良，松动脱落。
或者是传感器检测到的温度超过了230°C.
请与TECSYSTEM S.r.l.公司技术部门取得联
系。
此现象是由传感器损坏或者相应接线不良引
起。通过T.MAX 功 能查看报警故障通道，
检查对应的接线端子或更换对应的传感器。
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21) 有关FCD功能的说明：
FCD功能是NT系列温控器新增的一种针对PT100探测器的动态监控功能
如果温度探头被意外损坏，则突出的问题就是探头自身阻抗快速增加和
变化，因此导致温控器显示的监测温度迅速变化。
显然，这种温升并不是被监控保护的电力设备比如电动机，干式变压器
或封闭式变压器等自身故障引起的。
因此，这时候必须要监定为传感器处于故障状态以避免输出（ALARM）
高温报警信号甚至是跳闸（TRIP）等误报警事故。
当温控器是应用于对电机马达的监控时，快速温升FCD报警的定义不能
单指传感器故障，也可能是转子发生被卡住或者空转的故障状态，因此
用户应进行按不同的应用情况为FCD报警作不同的定义与应用。
当温升速率超过设定的速率（n°C/秒）（n值：从1到30），通过激活
FCD功能，温控器可以通过输出触点54-55输出FAULT错误报警信号。
通过参数设定，用户可以根据不同的使用要求选择如下不同的精度等
级：
从1至10：高灵敏度，用于即时探测电动机转子失速情况。
从10至20：平均灵敏度，用于监测影响传感器采集数据，线路连接不良
以及传感器缺陷等各种干扰信息。
从20至30：低灵敏度，用于的场合是，高灵敏度设置可能会导致不必要
的FCD功能中的错误报警
设置“no”模式，则FCD功能被禁止。
当一个通道出现FCD/FAULT故障报警时，相关的高温报警（ALARM）
和跳闸（TRIP）报警功能将被锁住，只是显示温度快速升高的FCD报
警，避免产生错误的高温报警（ALARM）和跳闸（TRIP）报警。
按下Reset键删除所有通道的FCD信号，检测修复仪表故障。
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NT579-NT579 RS485 智能温控器
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22) 安装及线路联接：
嵌装开口尺寸:152*76mm；用附带的紧固件进行锁紧。 图示2
PT100传感器连接
白色线
1 2 3
CH L1
4 5 6
CH L2
7 8 9
CH L3
红色线
红色线
控制输出连接
特别说明：通电时故障报警继电器将断开；断电后或故障发生时故障报警继电器将闭合。
50 51
高温报警
52 53
跳闸报警
54 55
故障报警
电压：18~36 Vdc
必须注意正负极性
56 57
风机控制
风机无源输出，节点容
量:12A@250Vac，
(cos Φ=1)
+
-
41 42
RS485通讯输出连接（标准型产品无）
Gnd
RS485输出连接
+
-
62
仪表后面板实物图
61
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23) 质保承诺：
本产品享受从购买之日起12个月的质保期。如在质保期内发生因产品
本身的生产工艺不符，校准不良等原因造成的质量问题或泰狮智能温控
（上海）有限公司的自身原因造成的产品不良，我们将免费维系或更
换。
如果是客户不按使用说明使用操作或其它客户原因造成的产品不良，不
属于免费保修范围，如需维修或更换，客户需承担相关费用。
注意：
为了保护环境，废旧产品，需要隔离送废品回收处，或返回我司进行专
业回收处理。
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NT579-NT579 RS485 智能温控器
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