GASTRON GTC-700 User manual

GTC-700
Instruction Manual
Headquarters / Engineering research laboratory :
23 Gunpo Advance d Industry 1-ro(Bugok-dong), Gunpo-si, Gyeonggi-do
Tel [phone] Fax [phone]
Yeongnam business office / Plant :
55 Gonghangap-gil 85beon-gil, Gangseogu, Busan Metropolitan City
Tel [phone] Fax [phone]
E-mail : [email protected]
www.gastron.com
Read in detail for correct use.

Gas & Flame
Detection System
GTC-700
Instruction Manual
www.gastron.com
02_03
Thank you very much for purchasing a product from Gastron Co. Ltd.
Our Gastron Co.Ltd. is a company specialized in Gas Detector & Gas Monitoring System and have been
recognized by many customers for the best quality and use convenience. We always seek to help our
customers to find the product they need and we continuously research to develop gas detectors that satisfies
our customers. From now on, you can solve all problems related to gas detectors with the products of
Gastron. We Gastron will be responsible for your satisfaction.
This user manual describes operation and simple maintenance methods etc. for the gas detector. Please read
carefully and store it in a safe place. Using it as a reference will help a lot when you have a question during
use.
* KOSHA GUIDE : P-135/6-2018
Calibration must be performed at a frequency requested by the manufacturer and shall be performed quarterly when
the calibration period is not specified.
The product and manual are subject to change without a notice for the product's functional improvement and ease of use.
■Foraccurateoperationofthegasdetector,pleaseperformaninspectionandacalibrationat
least once per 6 months.
( * In reference to KOSHA GUIDE: P-135/6-2018 / 7.2 In-house inspection, section 2)
■Foraccurateoperationofthegasdetector,inspectionandcalibrationusingareferencegasbefore
measurement is recommended.
■Failuretocalibratemayresultinmalfunctionoftheequipmentduetoagingofthesensor.
■Onlyanindividualspecializedingasdetectormaydisassemblethedevice.
■Wirespecificationforthepowercablemustbedecidedinreferencetothe"Installationcablelength"
section.
■Pleasecontactourcompany'stechnicalsupport,e-mail,orwebsiteforinquiriesrelatedto
inspection and calibration of the gas detector.
Greetings
In case of a problem after purchasing the product,
please contact the address below.
· Address : 23 Gunpo Advanced Industry 1-ro,
Gunpo-si, Gyeonggi-do
· Tel : [phone]
· Fax : [phone]
· URL : www.gastron.com
· e-mail : [email protected]

www.gastron.com
04_05
ContentsContents
GTC-700
Instruction Manual
7. Interface ······································································································································································· 32
7.1. RS485 MODBUS Interface ····································································································································· 32
7.1.1. Network Setting ····································································································································· 32
7.1.2. RS485 MODBUS Register(Used Commonly with MODBUS TCP/IP) ····················································· 32
8. Troubleshooting·························································································································································· 33
9. Drawings and Dimensions········································································································································ 34
10. Revision History··························································································································································· 35
1. Overview ······································································································································································ 6
2. Characteristics ····························································································································································· 6
3. Specifications······························································································································································· 7
3.1. Basic Specification (Based on 128 Channel)····································································································· 7
3.2. Mechanical Specifications (Based on 128 Channel)························································································· 7
3.3. Environmental Specifications ···························································································································· 7
4. Name and Description of Each part························································································································ 8
4.1. External Components········································································································································ 8
4.2. Internal Components········································································································································· 10
5. Installation···································································································································································· 11
5.1. Power and External Signal Configuration········································································································· 11
5.2. Channel Configuration ······································································································································ 12
5.3. Input Signal Configuration ································································································································ 13
5.3.1. 3-wire Type Gas detector Connection Method······················································································ 14
5.3.2. 2-wire Type Gas detector Connection Method······················································································ 14
6. Operation Method ····················································································································································· 15
6.1. Power ON··························································································································································· 15
6.2. Measuring Mode ··············································································································································· 16
6.3. Operation Setting ·············································································································································· 17
6.3.1. Configuration Mode ······························································································································· 18
6.3.2. Calibration Mode ···································································································································· 20
6.3.3. Signal Compensation Mode ··················································································································· 21
6.3.4. TEST Mode ·············································································································································· 22
6.3.5. RS485 MODBUS Network Configuration······························································································· 23
6.3.6. MODBUS TCP/IP Network Configuration Mode ··················································································· 25

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06_07
GTC-700 Series Analog Mux Controller has various built-in functions and equipped with micro-processor and high
resolution A/D converter. GTC-700 is constructed as central studio system and consists of one common unit that
performs collection and display of measurement data and data communication and a 8-channel analog input unit that
measures analog input signal (0 - 20 mA). Analog input unit can be expanded up to 16-channels depending on the
service environment.
GTC-700 Series is built with FND digital display (mA value) and LED that displays status of analog input channel,
operation status of internal network, and power on status for the main power. It has RS-485 port and Ethernet port for
data network.
3.1. Basic Specification (Based on 128 Channel)
ITEMS SPECIFICATION
Input Signal Analog 4-20mA ( 0~ 20mA )
Input Voltage
Absolute min:
Nominal:
Absolute max:
Ripple maximum allowed:
18V
24V
30V
1V pk-pk
Max. Wattage
Common Unit 58mA@24VDC( normal )
Analog Unit 32mA@24VDC( normal )
For 128-channel configuration 595mA@24VDC( normal )
Max. Wattage
Common Unit 1.39W@24VDC ( normal )
Analog Unit 0.768W@24VDC ( normal )
For 128-channel configuration 14.28W @24VDC ( normal )
Measuring Value Display Common Unit 4-Digit Seven Segment x 2
Analog Unit Power, Error, Status LED
Output Signal Isolation RS-485 MODBUS, MODBUS TCP/IP
Cable Connection Length and Wire Requirement
Power Approx. 40 m when CVVS,CVVSB
with shield AWG23 are used.
RS485 STP (Shielded Twisted Pair)
Max. 1 km
TCP/IP CAT5 cable or equivalent RJ45
Max. 100m
Approval CE
3.2. Mechanical Specifications (Based on 128 Channel)
ITEMS SPECIFICATION
Dimension 593.5(W) x 132.5(H) x 120(D) mm
Weight including Sensor App. 4.7kg
Mounting Type Wall mount
Body Material aluminum alloy
3.3. Environmental Specifications
ITEMS SPECIFICATION
Operation Temperature 0to55℃
Storage Temperature 0to55℃
Operation Humidity 5 to 99% RH (Non-condensing)
Pressure Range 90 to 110KPa
GTC-700 Series Analog Multiplexer Controller is convenient to build the monitoring system with RS-485 & Ethernet
network. It can construct max. 128 detectors with 1 set of controller. It enables expansion of controller to construct 128
or more detectors. (Max. 32 sets, 4096 channels)
Analog input (0 - 20 mA) port is grounded to protect the system safely in an event of thunderbolt or surge. It is equipped
with high performance microprocessor to scan 128-channels within 1 sec (0.64 sec). Each channel can be span calibrated
for accuracy of measurement and calibrated to compensate the cable route.
2. Characteristics
GTC-700
Instruction Manual 1. Overview 3. Specication

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08_09
4.1. External Components
NO NAME DESCRIPTIONS
1Mount hole Mount hole for fixing the product
2Common Unit holder It is used for detachment or fixing of Common unit.
3First FND It displays measuring channel and main/sub menu.
4Second FND It displays measurement and menu setting value of the selected channel.
5Function key It is used to enter a setting mode or move between menu.
6Up key It is used to move between measuring channel and to adjust setting.
7Down key It is used to move between measuring channel and to adjust setting.
8Reset key It is used to return to the previous step in setting modes or to the main screen.
NO NAME DESCRIPTIONS
9Ethernet Connector Ethernet Network Connector
10 RS-485-H Terminal RS-485 Network High Line Connection Terminal
11 RS-485-L Terminal RS-485 Network Low Line Connection Terminal
12 Main Power Terminal (V+) Device Power '+' Connection Terminal (Normal 24 VDC)
13 Main Power Terminal (V-) Device Power '-' Connection Terminal (Normal 24 VDC)
14 Frame Ground Terminal Frame Ground Terminal
15 Main Power Status LED LED for main power status, It lights on when power turns on.
16 Main Power Switch Power ON/OFF Switch
17 Analog Input Channel
Status LED
It displays measurement status
Orange light turns on below 3.9 mA.
Green light turns on between 4 ~ 20 mA.
Red light turns on above ~ 21 mA.
18 Analog Input Unit holder It is used for detachment or fixing of analog input unit.
19 Analog Input Unit
Power Status LED LED for power status of analog input unit. It lights on when power turns on.
20 Analog Input Unit
Error Status LED It displays error status of analog input unit. It lights on upon an event of error.
21 Analog Input Unit
Com. Status LED It displays network status of analog input unit and common unit. It flashes during normal network.
22 Positive Analog Input
Terminal External 0 ~ 20 mA current signal '+' Input terminal
23 Negative Analog Input
Terminal External 0 ~ 20 mA current signal '-' Input terminal
24 Analog Input Terminal
Unlock Button Press to remove analog input terminal
[Table 1. Power Configuration Description]
GTC-700
Instruction Manual
[Figure 1. GTC-700 External Components]
■GTC-700consistsof1commonunitand16analoginputunits.TheanaloginputunitsarenamesasSlot1,
Slot2,…Slot 16 from the left and min. 1 to max. 16 slots can be selected for configuration.
4. Name and Description of Each Part 4. Name and Description of Each Part

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10_11
GTC-700
Instruction Manual 5. Installation
■Itisprohibitedforanindividual,otherthananapproveduseroratechnicianresponsiblefor
installation and repair from the head office, to install a gas leak detector on site or open the cover
of the installed gas leak detector and manipulate it. This may cause serious loss of life and property
from fire, explosion, and etc. In addition, please check whether there is any remaining explosive
gas or combustible material in the surroundings. Power must be turned off before performing work.
[Figure 4. Common Unit
Terminal Configuration]
5.1. Power and External Signal Configuration
■Tosupplypowertotheproduct,constructusingthepowerand
signal terminals located on the front part of the common unit.
TYPE TERMINAL NAME DESCRIPTION
1) Power
& Signal Terminal
①485-H MODBUS 485 network terminal, connected to RS485 A terminal (TRXD+ or P) of an
external device.
②485-L MODBUS 485 network terminal, connected to RS485 B terminal (TRXD- or N) of an
external device.
③V+ "+"terminalfordevicepowersupply(providesnormal24V).Connectedtotheexternal
power supply.
④V- "-"terminalfordevicepowersupply(providesnormal24V).Connectedtotheexternal
power supply.
⑤FG Frame Ground terminal that is connected to the power supply for the device.
2) RJ45 Connector LAN RJ45 connector for MODBUS TCP/IP network.
3) Power Switch Power S/W Power ON/OFF Switch
[Table 4. Common Unit Terminal Description]
[Figure 2. Common Unit Configuration] [Figure 3. Analog Input Unit]
NO NAME DESCRIPTIONS
1Common Unit F/W Download Connector Used to change Common Unit F/W.
2Common Unit to Motherboard Connector When common unit is equipped, it is connected to mother B/D/.
3RS-485 termination Jumper Connected when RS-485 terminating resistor is used.
[Table 2. Common Unit Configuration Description]
NO NAME DESCRIPTIONS
1Analog Unit F/W Download Connector Used to change Analog Unit F/W.
2Analog Unit to Motherboard Connector When Analog unit is equipped, it is connected to mother B/D/.
[Table 3. Analog Unit Configuration Description]
4.2. Internal Components
4. Name and Description of Each Part
■Aftercheckingwiringandpowervoltage,turnonthepowerswitchlocatedatthefrontpart.
■TosyncwithanexternalPCorPLC,usetheLANconnectorinthecommonunitortheRS485terminal
(485-H, 485-L) in the power & signal terminal.

NO SLOT NO CHANNEL NO CHANNEL DISPLAY NO NOTE
1
Slot1
1CH.1-1
2 2 CH.1-2
3 3 CH.1-3
4 4 CH.1-4
5 5 CH.1-5
6 6 CH.1-6
7 7 CH.1-7
8 8 CH.1-8
9
Slot2
9CH.2-1
10 10 CH.2-2
11 11 CH.2-3
12 12 CH.2-4
13 13 CH.2-5
14 14 CH.2-6
15 15 CH.2-7
16 16 CH.2-8
………
121
Slot16
121 CH.16-1
122 122 CH.16-2
123 123 CH.16-3
124 124 CH.16-4
125 125 CH.16-5
126 126 CH.16-6
127 127 CH.16-7
128 128 CH.16-8
■Channelconfigurationperslotisasshowninthetablebelow.
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5. Installation5. Installation
GTC-700
Instruction Manual
[Table 5. Slot Configuration]
5.2. Channel Configuration
■GTC-700canbeconfiguredwith16slots(possibleformax.128signalinput)and8signalinputsof4-20mAare
possible in each slot.
■Configuredanaloginputunitmustbesetfromtheleftsideanditisnumberedasslot1fromtheleft.
[Figure 5. Slot Configuration]

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5. Installation
GTC-700
Instruction Manual
[Figure 6. 3-Wire Gas Detector Connection Method]
[Figure 6. 3-Wire Gas Detector Connection Method]
5.3. Input Signal Configuration
5.3.1. 3-wire Type Gas detector Connection Method
5.3.2. 2-wire Type Gas detector Connection Method
■Whenthegasdetectorhas3-wire(V+,mA,V-)forpower
and 420 mA output components, connect to the Analog as
shown in Figure 5.
■ConnectingcablemustcompriseofCVVSorshieldcable
with CVVSB 0.7 sq or higher
■Whenthegasdetectoroutputhas2-wire(V+,V-),connect
to the Analog input unit as shown in Figure on the right.
■ConnectingcablemustcompriseofCVVSorshieldcable
with CVVSB 0.7 sq or higher.
■Checkwiringsforoperationpower,detectionparts,alarmparts,andconcentrationdisplay.
■CheckthepowerinputthenturnONthepowerS/W.
■CheckwhetherpowerLEDatalarmandconcentrationdisplaypartslighton.
■Performself-test.
6.1. Power ON
- When power turns on, PWR LED lights on then it performs system initialization for approx.
- 2 sec.
- Firmware version information is displayed on the common unit FND.
- Upon an event of error during self-test, the analog input unit number is displayed on the first
- FND in the common unit and the error status LED of the analog input unit lights on.
- It displays error code (E-01~E-07) on the second FND.
- ※Inaneventoferrorduringmeasurementincludingtheinitializationprocess,italways
- displays error code and after removal of the cause of error, it returns to measuring mode.
6. Operation Method

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GTC-700
Instruction Manual
■GTC-700has6settingmodesasshownbelow.
■EachmodecanbeenteredafterpressingFUNCkeyfor2secorlongerfollowedbypasswordinput.
■UsingUP(▲)orDOWN(▼)key,theusercanselectamodetheneditit.Whenthereisnokeyinputfor10sec
longer within the same menu, it automatically returns to measuring mode.
■WhenRESETkeyispressedduringmodeset-up,itreturnstomeasuringmode.
■Afterpoweron,whenthereisnoerrorfrom"SELFTEST",itautomaticallyentersMeasuringMode.
6.3. Operation Setting6.2. Measuring Mode
- It displays measurement of channel 1-1 (Channel 1 of Analog Unit 1)
- It displays the current 11.58 mA input status of channel 1-1.
-UsingUP(▲)orDOWN(▼)key,theusercancheckmeasurementsofchannel1-1~channel
- 16-8.
- It displays 0 because there is no input in the currently selected channel 16-8.
- For the channel status LED of analog input unit in measuring mode, orange lights on for values
- below 4 mA, green lights on for values in a range of 4 mA ~ 20 mA, and red lights on for
- values exceeding 20 mA.
[Table 6. Operation Setting Mode Default Settings]
LEVEL1 LEVEL2 LEVEL3 DEFAULT
F1/CONF
(Configuration Mode)
ADD
(MODBUS RS485 Address) OFF, 1~32 OFF
PSWD
(Password) 0~99 (Password Setting) 00
SCAN
(Scan Display) ON or OFF OFF
END
F2/CAL
(Calibration Mode)
Channel select Select 1-1 ~ 16-8 calibration channel 1-1
1A20 20 mA Signal Input -
CAL Result Display Calibration Result FAIL/SUCC
TEST Display Measurement -
END
F3/ SAD
(Signal Correction Mode)
Channel select Select 1-1 ~ 16-8 Compensation Channel 1-1
0.00 -1.00 ~ +1.00mA Compensation Input 0.00
END - -
F4
(TEST Mode)
DSP(display) Test all LED and FND -
Cur 1-1 ~ 16-8 Channel Test Available test
END
F5/485
(MODBUS RS485
Setting Mode)
baud(Baud Rate) Baud rate Setting (4800 ~ 115200) 38400
Sbit (stop bit) 1 or 2 1
Prty(parity bit) Even , Odd or none none
END
F6/NET
(MODBUS TCP/IP
Setting Mode)
IP Address( XXX . XXX . XXX . XXX ) 192.168. 001.201
Snet(subnet mask) Address(XXX . XXX . XXX . XXX ) 255.255. 255.000
Gate(gateway) Address(XXX . XXX . XXX . XXX ) 192.168. 001.254
Nac(mac) Address( XX-XX-XX-XX-XX-XX ) 6C-E9-83-00-00
END
6. Operation Method 6. Operation Method

- It is password change menu.
-ThepasswordisforenteringdevicesettingmenuandpressingUP(▲)orDOWN(▼)key
- increases or decreases number for password.
- Password can be set in a range between '00~99 and default is '00'.
- After setting the password, press FUNC key to save the setting and move to the next menu.
- It is a function to automatically change measuring channel. When it is set to On, it changes
- from channel 1-1 to 16-8 in an order each sec and displays the measurement in measuring
- mode.
- Default setting is 'OFF'. Press FUNC key to save the setting and move to the next menu.
- It displays end of configuration menu. Pressing FUNC key changes to the initial menu page
- "[F1]/CONF".
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■When"FUNC"keyispressedfor2secorlongerinmeasuringmode,itenterspasswordinputstep.
6.3.1. Configuration Mode
-AfterenteringpasswordusingUP(▲)orDOWN(▼)keyfollowedbypressingFUNC(Function)
- key,itentersFunctionMode.(Default="00")
-Itdisplays"FAIL"messageinaneventofpassworderror.
-UsingUP(▲)orDOWN(▼)key,select“[F1]/CONF”(Configurationmenu)thenpressFUNC
- key to enter sub-menu setting.
- It is a menu that sets Modbus Slave Address.
-Foraddressinput,pressingUP(▲)orDOWN(▼)keyincreasesordecreasesnumber.
- Setting range is OFF~32 and default is OFF.
- After setting the address, press FUNC key to save the setting and move to the next menu.
6. Operation Method 6. Operation Method

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■Itisamodethatcancalibrate4-20mAsignalinput.
6.3.2. Calibration Mode
■Itisamodetoadjust4-20mAsignalinputcompensation.
6.3.3. Signal Compensation Mode
- When the calibration is performed normally, the current measurement displays.
- It changes the value from current generator and checks whether the output is the same value.
- Pressing FUNC key calibrates the next channel
- Pressing RESET key moves to the previous calibration step.
- Pressing FUNC key for 2 sec or longer followed by password input enable menu selection.
-UseUP(▲)orDOWN(▼)keytoselect"CAL"(Calibrationmenu)thenpressFUNCkeytomove
- to the channel selection menu to perform calibration.
- Press RESET key to return to measuring mode.
-BypressingUP(▲)orDOWN(▼)key,theusercanmovebetweenchannels(1-1~16-8)for
- calibration.
- Pressing RESET key moves to the previous step.
- Using a current generator, input 20 mA output into the analog input terminal (positive/negative)
- of the channel to be calibrated then press FUNC key to perform calibration.
- Pressing RESET key moves to the previous step.
-Whenthecalibrationrunsnormally,"CAL/SUCC"messageflashes2timesthenitmovestothe
- next menu, which is test menu.
-Whenthecalibrationfails,"CAL/FAIL"messageflashes2timesthenitmovestotheprevious
- menu.
- Pressing FUNC key for 2 sec or longer followed by password input enable menu selection.
-UsingUP(▲)orDOWN(▼)key,select"[F3]/SAD"thenpressFUNCkeytoperformcalibration
- on each channel.
- It is a function that compensates the difference from the wire.
- Press RESET key to return to measuring mode.
-BypressingUP(▲)orDOWN(▼)key,theusercanmovebetweenchannels(1-1~16-8)for
- compensation.
- Pressing RESET key moves to the previous step.
6. Operation Method 6. Operation Method

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-UseUP(▲)orDOWN(▼)keytoselectachannelforsettingthenpressFUNCkeyto
- compensate the selected channel.
-UP(▲)orDOWN(▼)keyscanbeusedtosetavalueinarangeof-1.00~1.00in0.01unit.
- When it is set to -1.00, displayed value becomes 19.00 for a measurement of 20.00.
- After calibration, SAD setting initializes to 0.
- Pressing RESET key moves to the previous step.
-Whenitrunsnormally,"SUCC"messageflashes2timesthenitmovestothenextmenu
-Whenitfails,"CAL/FAIL"messageflashes2timesthenitmovestothepreviousmenu.
- Pressing FUNC key for 2 sec or longer followed by password input enable menu selection.
-UsingUP(▲)orDOWN(▼)key,select"tESt"thenpressFUNCkeytomovetosub-menuoftest
- Press RESET key to return to measuring mode.
- It is the display test menu. Pressing FUNC key runs the test.
- It tests condition of two common unit FNDs and LED of analog input unit.
-FortwocommonunitFNDs,text"8"flashesandmovesinclockwisedirectioninanorder.
- For LED of analog input unit, power status LED lights on and Error/Com./Channel (Red &
- Green) Status LEDs flash in an order.
- Pressing FUNC key ends the test and moves to the next test menu.
- It is the current test menu.
- Pressing FUNC key enables testing from ch. 1-1.
-PressingFUNCkeyincreasesachannelandpressingUP(▲)orDOWN(▼)keysetavalue.
-Text"t"flashescontinuouslyanditcanbesetinarangeof0.0~20.00(0.5unit).
- It delivers set value upon a request from network master.
6.3.4. TEST Mode ■ItsetsRS485MODBUSnetworkoption,whichisanexternalinterfaceofthedevice.
6.3.5. RS485 MODBUS Network Configuration
- Pressing FUNC key for 2 sec or longer followed by password input enable menu selection.
-UsingUP(▲)orDOWN(▼)key,select"485"thenpressFUNCkeytomovetosub-menuof
- 485 setting.
- It is a setting for network with external master device (PLC).
- Press RESET key to return to measuring mode.
- It is Baud rate setting menu.
-UseUP(▲)orDOWN(▼)keytoselectanetworkspeedtobeused.(4.8/9.6/19.2/38.4/
- 57.6 / 115.2 kbps)
- Pressing FUNC key sets the selected network speed and moves to the next network setting menu.
6. Operation Method 6. Operation Method

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- It is stop bit setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween1or2.
- Pressing FUNC key sets the selected bit and moves to the next network setting menu.
- It is parity bit setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetweeneven/odd/none.
- Pressing FUNC key sets the selected bit and moves to the next network setting menu.
- When there is a change, it returns to the selected menu.
-Tocompletethechangeofsetting,useUP(▲)orDOWN(▼)keyintheselectedmenutoselect
- UP-y. If the change is not wanted, select UP-n.
- When UP-y is selected, it runs system initialization and changes to measuring mode.
- When UP-n is selected, it changes to the next menu.
- There is no change during menu setting. It displays the end of the selected menu.
- After approx. 1 sec, it moves to the initial menu for network setting.
- Pressing FUNC key for 2 sec or longer followed by password input enable menu selection.
-UsingUP(▲)orDOWN(▼)key,select“nET”thenpressFUNCkeytomovetosub-menuof
- network setting.
- Press RESET key to return to measuring mode.
- It is IP address setting menu. Pressing FUNC key moves to the IP address setting menu.
- Default setting is 192.168.1.201.
- It is the first IP address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the second IP address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
6.3.6. MODBUS TCP/IP Network Configuration Mode
6. Operation Method 6. Operation Method

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- It is the third IP address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the fourth IP address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and IP address setting completes. It moves to
- the next network setting menu.
- It is subnet mask address setting menu.
- Default setting is 255.255.255.0.
- It is the first subnet mask setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the second subnet mask setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the third subnet mask setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the fourth subnet mask setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is gateway address setting menu.
- Default setting is 192.168.1.254.
6. Operation Method 6. Operation Method

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- It is the first gateway setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the second gateway setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the third gateway setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is the fourth gateway setting menu.
-UseUP(▲)orDOWN(▼)keytoselectbetween0~255.
- Pressing FUNC key sets the selected address and moves to the next address setting menu.
- It is mac address setting menu.
- Pressing FUNC key moves to the menu for checking detailed mac address.
- Default setting is 6C, E9, 83, 00,00,00. (Hexadecimal).
- It is the first mac address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectavaluebetween00~FF(hexadecimal).
- It is the second mac address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectavaluebetween00~FF(hexadecimal).
- It is the third mac address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectavaluebetween00~FF(hexadecimal).
6. Operation Method 6. Operation Method

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- It is the fourth mac address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectavaluebetween00~FF(hexadecimal).
- It is the fifth mac address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectavaluebetween00~FF(hexadecimal).
- It is the sixth mac address setting menu.
-UseUP(▲)orDOWN(▼)keytoselectavaluebetween00~FF(hexadecimal).
- When there is a change, it returns to the selected menu.
-Tocompletethechangeofsetting,useUP(▲)orDOWN(▼)keyintheselectedmenutoselect
- UP-y. If the change is not wanted, select UP-n.
- When UP-y is selected, it runs system initialization and changes to measuring mode.
- When UP-n is selected, it changes to the next menu.
- There is no change during menu setting. It displays the end of the selected menu.
- After approx. 1 sec, it moves to the initial menu for network setting.
6. Operation Method 6. Operation Method

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7.1. RS485 MODBUS Interface
7.1.1. Network Setting
7.1.2. RS485 MODBUS Register (Used Commonly with MODBUS TCP/IP)
■Baudrate:57600bps(4800,9600,19200,38400,57600,115200bps)
■Stopbit:1Stop(1or2stop)
■Parity:Evenparity(Odd,Even)
■Fordetails,pleasegotowww.modbus.org
[Table 7.MODBUS Register]
TYPE ADDRESS DESCRIPTION TYPE
Measurement
(uA) 30001 ~ 30128
30001: Channel 1-1 Measurement
…
30128: Channel 16-8 Measurement
Unsigned Integer
Reserved 30129
Error Code 30130 ~ 30145
Analog Input Unit Error Code
30130: Unit1 Condition
…
30145: Unit16 Condition
Unsigned Integer (Refer
to section 9. Error code)
Heart bit 30191 Repeats 0 and 1 Unsigned Integer
30192 Increase by 1 Unsigned Integer
[Table 8. Fault List]
MESSAGE VALUE DESCRIPTION & CONDITION RECOVERY
E-01 0x0001 Analog Input Unit LED driver failure Change the failed
channel card
E-02 0x0002 Analog Input Unit A/D converter failure Change the failed
channel card
E-03 0x0003 Analog Input Unit LED driver & A/D converter failure Change the failed
channel card
E-04 0x0004 Analog Input Unit EEPROM failure Change the failed
channel card
E-05 0x0005 Analog Input Unit LED driver & EEPROM failure Change the failed
channel card
E-06 0x0006 Analog Input Unit A/D converter & EEPROM failure Change the failed
channel card
E-07 0x0007 Analog Input Unit LED driver, A/D converter & EEPROM failure Change the failed
channel card

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[Figure 8. GTC-700 Drawing]
VERSION CONTENTS DATE
1.0 Initial Revision of Manual 2016. 10. 05
10. Revision History9. Drawings and Dimensions