SRT-N118 - Metrix Electronics Ltd
Contents
1. A A fc Y EJ EE k HoLd gt mode er Parameter 4 H ZE ei PEA II t lt timE kal la D a laJ Hdis II i bei Hr jj D bei Hr II p R RR i TL HOut K option EE mm SS LS SECU gt scod Ko rej T Sa S Am I H a d Ar I m L Parameter r E z Addr edition 4 H o5 bAud n 1 PZ mbAc l i mbtO kend kend g L Parameter t Edit A edition 7 ES ei ESP II 4 digit special e password entering esc Y i Kg ders L co SEt z ae s g SErv 33 User manual METER SRT N118 8 THE ALARM LED Alarm LED AL lights in cases exceeding of permissible measurement range e detection of sensor malfunction shortcut or break of measurement circuit 9 ANALOGUE OUTPUT VALUE CALCULATION Lets assume that we have active current output and its parameters are modE 4 20 OUtL 100 OUtH 200 Lor 5 0 Hir 5 0 Parameters Lo r and Hi r define working range of current output to 3 8 21 mA Output current will be calculated for three displayed values D a D 17 5 According to formula from page 28 lout 17 5 10 0 20 0 10 0 x 16 mA 4 mA 0 75 16 4 16 mA Calculated lar do not exceeds the output2. Register Write Range Register description 01h No 999 6000 Measurement value no decimal point The status of the current measurement 0h data valid A0h top 02h No Oh AOh 60h border of the measurement range is exceeded 60h bottom border of the measurement range is exceeded 03h No 1 Decimal point position constant value 1 0 0 State of the relays and alarm LED binary format 1 on 0 off 00000000 000e00ba 04h Yes see descr a relay R1 b relay R2 e alarm LED If written only a b bits are important others are ignored these bits allows user to control the relays via RS 485 interface State of active current output expressed in 1 256 mA units it Yes Oh 1800h means that high byte express integer part and low byte fractional part of desired output current State of passive current output expressed in 1 256 mA units it Dh Yes 2CCh 1800h means that high byte express integer part and low byte fractional part of desired output current State of active voltage output expressed in 1 512 V units it means Yes Oh 1600h that high byte express integer part and low byte fractional part of desired output voltage 06h No 999 6000 Peak drop value no decimal point 2 tyPE parameter in InPt menu input type EW j Yes 0 2 0 Pt 100 1 Pt 500 2 Pt 1000 12h Yes 0 5 FiLt parameter in InPt menu measurement filtering rate 18h Yes 99 99 to
3. OUtP menu and rEL1 menu description Parameter mbtO can be set to values from 0 to 99 seconds The value 0 means that the time will be not controlled rESP this parameter defines minimal additional delay between the Modbus message and the answer of the device received and sent via RS 485 interface This additional delay allows the device to work with poor RS converters which do not works properly on baud rates higher than 19200 This parameter can be set to one of values 30 User manual METER SRT N118 Std answer as quick as possible no additional delay 35 10c 35 20c 35 50c 100c 200c answer delayed of 10 20 50 100 of 200 chars respectively where one character time depends on selected baud rate In the most cases parameter rESP should be set to Std no additional delay Unfortunately for some third party RS converters rESP should be adjusted experimentally Table 7 1 contains most frequently used values bAud parameter 38 4 57 6 115 2 rESP parameter 10c 20c 500 Tab 7 1 Settings of rESP parameter 7 3 8 Edit parameter This parameter allows to change the edition mode of numerical parameters dig the change to by digit mode Slid slide change mode 7 3 9 dEFS parameter This setting allows to restore the factory settings of the device To g
4. 0 0 26 toFF Turn off delay of relay R1 0 0 26 unit Unit of t on toFF parameters of relay R1 SEC 26 AL Reaction for critical situation of relay R1 OFF 26 Parameters of relay R2 operation rEL2 menu SEtP Relay R2 threshold 40 0 25 SEt2 Relay R2 second threshold 60 0 25 HYSt Hysteresis of relay R2 0 0 25 modE Operation mode of relay R2 on 25 ton Turn on delay of relay R2 0 0 26 toFF Turn off delay of relay R2 0 0 26 unit Unit of t on toFF parameters of relay R2 SEC 26 AL Reaction for critical situation of relay R2 OFF 26 Configuration of measurement input inPt menu tYPE Input type Pt 1 27 FiLt Filtering ratio 0 27 toFS Shifting of measurement scale 0 0 27 Active current output configuration OUtP menu Omod Active current output mode 0 20 mA 27 OUtL Display value for 0 mA or 4 mA current output 0 0 28 OUtH Display value for 20 mA current output 100 0 28 Lo r Extension of the bottom of the nominal output 5 0 28 range Hi r Extension of the top of the nominal output range 5 0 28 AL Current output value on critical exception 22 1 mA 28 Passive current output configuration OUtP menu Omod Passive current output mode 4 20 mA 27 41 User manual METER SRT N118 Parameter Description Default value User s value ama OUtL Display value for 4 mA current
5. 4 0 6 V 5 0V these registers are active only if device is equipped with current or voltage output after writing to register no 20h the device responds with an old address in the message after writing to register no 22h the device responds with the new baud rate the value of the mbAc parameter is also connected to write to this register so it is possible to block a writes but impossible to unblock writes via RS 485 interface The unblocking of the writes is possible from menu level only 37 User manual METER SRT N118 10 2 TRANSMISSION ERRORS DESCRIPTION If an error occurs while write or read of single register then the device sends an error code according to Modbus RTU specifications example message no 1 Error codes 01h illegal function only functions 03h 06h and 10h are available 02h illegal register address 03h illegal data value 08h no write permission see mbAc parameter AQ0h exceed of upper border of input range 60h exceed of lower border of input range AOh and 60h codes can appear only during reg 01h is reading by 03h function read of a single register 10 3 EXAMPLES OF QUERY ANSWER FRAMES Examples apply for device with address 1 All values are represent hexadecimal Field description ADDR Device address on modbus network FUNC Function code REG HL Starting address address of first register to read write Hi and Lo byte COUNT HL No of registers
6. again The one use password can be restored by Service Division only A r1 A r2 this option permits user on or prohibits oFF to modify the thresholds of the relays LEDs R1 R2 without knowledge about user password 7 3 7 rS menu This menu is connected with RS 485 interface and sets his properties Addr this parameter defines the address of the device accordingly to Modbus protocol It can be set in range from 0 to 199 If the value O is set then device responds to frames with address 255 FFh bAud this parameter determines RS 485 interface baud rate It can be set to one of 8 possible values 1 2 2 4 4 8 9 6 19 2 38 4 57 6 115 2 which respond to the baud rates of 1200 2400 4800 9600 19200 38400 57600 and 115200 bit s respectively mbAc this parameter sets the access to the configuration registers of the device Possible values on configuration registers can be set via RS 485 interface oFF configuration registers can not be set via RS 485 interface The access to registers no 04h i 05h cant be denied by mbAc parameter see LIST OF REGISTERS mbtO this parameter defines maximal time sec between following frames received by the device If the delay will be greater than the value of mbtO parameter the relays and analogue outputs which are controlled via RS 485 interface will set to alert state see
7. all devices connected to the net BROADCAST message ADDR FUNC REG HI COUNT H L CRC LH 00 06 00 22 00 04 29 D2 DATA H 0 DATA L 4 new baud rate 19200 baud GD Device do not reply to BROADCAST type messages 39 User manual METER SRT N118 5 Read of the registers 1 2 and 3 in one message example of reading a number of registries in one frame ADDR FUNC REG HL COUNT HL CRC LH 01 03 00 01 00 03 54 OB COUNT L the count of being read registers max 16 The answer ADDR FUNC BYTEC DATA H1 L1 DATA H2 L2 DATA H3 L3 CRC LH 01 03 06 00 DA 00 00 00 01 78 B4 DATAH1 L1 reg 01h 10 displayed value 1 0 DATA H2 L2 reg 02h O no errors DATA H3 L3 reg 03h 1 decimal point position 0 0 G There is no full implementation of the Modbus Protocol in the device The functions presented above are available only 40 User manual METER SRT N118 11 DEFAULT AND USER S SETTINGS LIST Parameter Description Default value User s value pes Parameters of relay R1 operation rEL1 menu SEtP Relay R1 threshold 20 0 25 SEt2 Relay R1 second threshold 40 0 25 HYSt Hysteresis of relay R1 0 0 25 modE Operation mode of relay R1 on 25 ton Turn on delay of relay R1
8. in the room where the unit is operating Excessively high temperatures cause faster ageing of the internal components and shorten the fault free time of the unit s operation In cases where the unit gets dirty do not clean with solvents For cleaning use warm water with small amount of detergent or in the case of more significant contamination ethyl or isopropyl alcohol AN MN v E 16 Using any other agents can cause permanent damage to the housing Product marked with this symbol should not be placed in municipal waste Please check local regulations for disposal of electronic products User manual METER SRT N118 5 FRONT PANEL DESCRIPTION alarm LED indicator AL Thresholds exceeding lt LED indicators R display infrared receiver programming pushbuttons Symbols and functions of push buttons Symbol used in the manual ESC MENU MENU Functions Enter to main menu press and hold by at least 2 sec e Exit the current level and Enter to previous menu or measure mode e Cancel the changes made in parameter being edited Symbol used in the manual ENTER Functions e Start to edit the parameter Enter to the sub menu Confirmation of changes made in parameter being edited Symbol used in the manual v Eunctions Change of the present menu e Modification of the parameter value Change of the display mode ENTER 6 PRINCIPLE OF OPERATION After tur
9. parameters measured displayed value 4 L Lk t signal 18 SEtP parameter gt lt Ee Ge koma expected signal value a zone A i d 4 4 i HYSt parameter zone B ua PT A l allowed signal AB rit ni DA deviation b relay state 4 l i i me modE lt an aaa ri ton 0 SB a Tri toFF 0 I l EE I I ests ER F man ime c relay state 4 rot f E Li riot modE oFF 222 mk ton D SE i SE it _ toFF 0 EEEE i otoi E Lk ZE ime d relay state 4 p LT m i NSE modE on l Wea Ap EE ton gt 0 oe EH toFF gt 0 open I I Waa I SE poa i et tt i ime a i KA i ist ow poi relay state A rot l p ton nl toFF d e modE oFF L dasad i i gt parameter Parameter e ton gt 0 T open m toFF gt 0 i l oi ee L SB lt gt E ie ime N toFF mt on Gg parameter parameter Description A B C D points where measured signal exceeds border values expected value allowed deviation Bon Borr Don Dorr relays state changes moments for t on gt 0 toFF gt 0 ta ts tc to time periods while input signal is in zone A or zone B Figure 6 4 Principle of LED relay output operation for one threshold mode Parameter SEtP sets a threshold of the relay and parameter HYSt sets a hysteresis of the relay Figure 6 4 a The relay can change his state only whe
10. to read write Hi and Lo byte BYTE C Data byte count in answer frame DATA H L Data byte Hi and Lo byte CRC LH CRC error check Hi and Lo byte 1 Read of the displayed value measurement SRT N118 device address 01h ADDR FUNC REG HL COUNT HL CRC LH 01 03 00 01 00 01 D5 CA a The answer we assume that the measure result is not out of range ADDR FUNC BYTE C DATA H L CRC L H 01 03 02 00 FF F8 04 DATA H L displayed value 255 no decimal point Decimal point position can be read from reg 03h 38 User manual METER SRT N118 b The answer if an error occur ADDR FUNC ERROR CRC LH 01 83 60 41 18 ERROR error code 60h bottom border of the measurement range is exceeded 2 Read of device ID code ADDR FUNC REG HL COUNT H L CRC LH 01 03 00 21 00 01 D4 00 The answer ADDR FUNC BYTEC DATA H L CRC LH 01 03 02 21 BO A1 AO DATA identification code 21BO0h 3 Change of the device address from 1 to 2 write to reg 20h ADDR FUNC REG H L DATA H L CRC LH 01 06 00 20 00 02 09 C1 DATA H 0 DATA L new device address 2 The answer the same as the message ADDR FUNC REG H L DATA H L CRC LH 01 06 00 20 00 02 09 C1 4 Change of baud rate of
11. 00 1000 EE A is 24V 5 10 Imax 100 mA Pt100 500 1000 depending on version Power s Figure 4 4 Terminals description relay outputs 10 User manual METER SRT N118 12 11 10 964 OCZ Umax Sav pe Imax 30mA Pmax 100mW OC1 OCZ RS 485 option option Pt100 500 1000 Z LAS Gring TSTST Q 6 S e 24V 5 10 Imax 100 mA Pt100 500 1000 depending on version Power SE Figure 4 5 Terminals description OC type outputs 12 11 10 poe KM RS 485 5 Ka A R Pt100 500 1000 RAE I s17 BEEBE AA 24V 5 10 Imax 100 mA Pt100 500 1000 on version Power SE depending Figure 4 6 Terminals description relay and active current outputs 12 11 10 i OC1 Umax 30V DC Imax 30mA Pmax 100mW ACTIVE OC1 current output RS 485 option option Pt100 500 1000 EEN a z O Uo 24V 5 10 Imax 100 mA Pt100 500 1000 on version Power supply depending Figure 4 7 Terminals description OC type and active current outputs 11 User manual METER SRT N118 12 12 11 10 R1 Passive isolated option current t output RS 485 gt A Pt100 500 1000 EE Uo 24V 5 10 Imax 100 mA Pt100 500 1000 on version Powe
12. A lower range limit OmA 4mA OV 1V 2v OutL parameter can be greater than QutH In this case the conversion characteristic is reversed it means that if input value raises the output value falls Lo r Hi r this parameters define the output value range If calculated output value Out exceeds defined range then analogue output generates signal equal to upper or lower border of the defined range These parameters defines the percentage extension of nominal analogue range with 0 1 resolution Parameter Lo r defines lower border of the range due to formula Qutni A A x Lo r where A lower signal value range limit This parameter can be set from 0 to 99 9 for active current output and active voltage output or from O to 29 9 for passive current output Parameter Hi r defines higher border of the range due to formula Qutna B B x Hi r where B higher signal value range limit This parameter can be set from 0 to 19 9 for active and passive current output or from O to 9 9 for active voltage output In example on page 34 of the DISPLAY VALUES CALCULATION paragraph the procedure of the analogue outputs determining is presented in details AL this parameter determines the behaviour of analogue output if any critical situation occurs According to version of the device this parameter can be set For active current output 28 noCH cu
13. Assisting the automation rz simex industry since 1986 User manual METER SRT N118 e Firmware v 6 00 or higher e Input type Pt100 500 1000 e Wall mounting case IP 67 CE Read the user s manual carefully before starting to use the unit or software Producer reserves the right to implement changes without prior notice 2015 01 07 SRT N118_INSSXEN_v 2 09 002 User manual METER SRT N118 CONTENTS 4 5 Z Z 4 2 ASSEMBLY 11111111211 S 4 3 CONNECTION METHOD wana tee eeatt e reada alee tens as edad eae dia eee tates 8 4 4 MAINTENANCE a ich Dzia dada e zai dod ea darzy 16 5 FRONT PANEL DESCRIPTION wT 6 PRINCIPLE OF OPERATION 1 17 6 1 MEASUREMENT MODE PLA 6 2 DETECTION OF THE PEAK VALUE 6 3 CONTROL OF THE RELAY OUTPUTS zak 6 3 1 One threshold MOJE T 20 6 3 2 Two thresholds MOJE zasada EE dO AA PARE 21 7 DEVICE PROGRAMMING 7 1 PROGRAMMING MENU sa Z2 PARAMETERS EDITION ex Eder 7 2 1 Numeric parameters digit change model 23 7 2 2 Numeric parameters slide change mode ae 7 2 3 Switch parameters LIST type 24 73 MENU DESCRIP TION eege Eeer ege 23 1 HELA AMC eene EE eben 25 7 3 2 THP menu 7 3 3 OutP menu 7 3 4 bri parameter 7 3 5 HOLd menu 7 3 6 SECu menu 7 3 7 tS menu 7 3 8 Edit parameter 7 3 9 dEFS parameter 7 3 10 S
14. E menu 7 4 MENU STRUCTURE 8 THE ALARM LED scccicssicscssnsectsiccatsatcvssctecesiesnente 9 ANALOGUE OUTPUT VALUE CALCULATION 10 THE MODBUS PROTOCOL HANDLING 1 34 10 7 EIS TCOP EE 10 2 TRANSMISSION ERRORS DESCRIPTION 38 10 3 EXAMPLES OF QUERY ANSWER FRAMES 11 DEFAULT AND USER S SETTINGS Us 41 User manual METER SRT N118 Explanation of symbols used in the manual This symbol denotes especially important guidelines concerning the installation and operation of the device Not complying with the guidelines denoted by this symbol may cause an accident damage or equipment destruction IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS RESPONSIBLE FOR POSSIBLE DAMAGES This symbol denotes especially important characteristics of the unit Read any information regarding this symbol carefully 1 BASIC REQUIREMENTS AND USER SAFETY AY The manufacturer is not responsible for any damages caused by inappropriate installation not maintaining the proper environmental conditions and using the unit contrary to its assignment Installation should be conducted by qualified personnel During installation all available safety requirements should be considered The fitter is responsible for executing the installation according to this manual local safety and EMC regulations If the device is equipped with PE connector it should be connected to PE wire Otherwise PE wire should be c
15. FS parameter in InPt menu shift of measurement scale expressed by 0 1 C 20h Yes 0 199 Device address 21h No 21B0h Device identification code ID bAud parameter in rS menu baud rate 22h3 Yes 0 7 0 1200 baud 1 2400 baud 2 4800 baud 3 9600 baud 4 19200 baud 5 38400 baud 6 57600 baud 7 115200 baud 23h4 Yes 0 1 mbAc parameter in rS menu permission to write registers via RS 485 interface 0 write denied 1 write allowed Parameters of SECU menu binary format 0 oFF 1 on aah gt SE bit 0 A r1 parameter bit 1 A r2 parameter rESP parameter in rS menu additional response delay 25h Yes 0 5 0 no additional delay 1 10c option 2 20c option 3 50c option 4 100c option 5 200c option mbtO parameter in rS menu maximum delay between 27h Yes 0 99 received frames 0 no delay checking 1 99 maximum delay expressed in seconds 2Dh Yes 1 8 bri parameter display brightness 1 the lowest brightness 8 the highest brightness 35 User manual METER SRT N118 Register Write Range Register description R Edit parameter numerical parameters edit mode SER CS Geck 0 dig mode 1 SLid mode 30h Yes 999 9999 SEtP parameter in rEL1 menu no
16. St 9 modE z e The relay outputs and LEDs named R can be controlled depend on both the current value and the peak value when peak detection is active of the input signal e If device is not equipped with one or more relay outputs menus refer to this relays are available but apply to LED indicators only In such case LEDs indicates exceeding of particular thresholds first threshold of the relay range 999 9999 Negative values can be input by selecting a 7 sign on first digit to change value use and v buttons Threshold is the medium value of relay hysteresis second threshold of the relay range 999 9999 Negative values can be input by selecting a sign on first digit to change value use and v buttons This threshold is accessible when modE parameter is set to in or out value Threshold is the medium value of relay hysteresis hysteresis of relay range 0 999 Full hysteresis of the relay is equal to 2x HYSt parameter The relay state can change when an input signal is out of threshold hysteresis to threshold hysteresis zone Presented parameters should be set to ensure that SEtP HYSt SEt2 HYSt SEtP HYSt or SEO HYSt does not exceed the measure range Additionally in two threshold mode modE in or out the hysteresis for both thresholds must not cover each other in other case relay can t change h
17. aging the connections inside the units and breaking the thread In the case of the unit being fitted with separable clamps they should be inserted into appropriate connectors in the unit even if they are not used for any connections Unused terminals marked as n c must not be used for connecting any connecting cables e g as bridges because this can cause damage to the equipment or electric shock User manual METER SRT N118 AN If the unit is equipped with housing covers and sealing to protecting against water intrusion pay special attention to their correct tightening or clamping In the case of any doubt consider using additional preventive measures covers roofing seals etc Carelessly executed assembly can increase the risk of electric shock After the installation is completed do not touch the unit s connections when it is switched on because it carries the risk of electrical shock Due to possible significant interference in industrial installations appropriate measures assuring correct operation of the unit must be applied To avoid the unit of improper indications keep recommendations listed below Avoid running signal cables and transmission cables together with power supply cables and cables controlling inductive loads e g contactors Such cables should cross at a right angle Contactor coils and inductive loads should be equipped with interference protection systems e g RC type Use of sc
18. ations e g Input values exceeds permissible measurement range User can select that the relays will be turned on turned off or not changed in critical situations All parameters connected with relay outputs are described in paragraph rEL1 menu 6 3 2 Two thresholds mode displayed value A zone B E Na wees Stace T a Se SEtP or SEt2 parameter l FN EEE p T HYSt parameter enl U GRE z sz ZE ZEE 8 KE tt I a Nap I tt Ge MI i b relay state it NE C7 i d time modE lt T G SS i ton 0 d i USE 1 IRE I toFF 0 HER Im it c relay state 4 it AE IT i 1 1 modE out i OBA Po dos d e NIE ton 0 i d U cose I o toFF 0 L L L relay state 4 A i d modE in E NE Lordi d ka AE ton gt 0 L ni toFF gt 0 L D I DA SSE I r LA 1 e relay stateA ton parameter toFF parameter ton parameter modE out EI i t 1 i closed Ja i E tons 6 mi i e I close o toFF gt 0 gt i Ze time toFF parameter t on parameter toFF parameter Obja nienie A B C D E points where measured signal exceeds border values expected value allowed deviation Bon Borr Con Corr Eon Eorr relays state changes moments for t on gt 0 toFF gt 0 ta tes te to te time periods while input signal is in zone A or zone B Figu
19. d with peaks detection function It can detect a peaks of the input signal and display their values Presets connected with this function are placed in HOLd menu see description of HOL d menu The detection of the peak can be done if the measured signal raises and drops of value at least equal to parameter PEA Detected peaks are displayed during the time defined by parameter timE If a new peak will be detected while one is displayed this new peak will be displayed and display time counter will be cleared Figure 6 1 If no peaks are detected while time timE elapses device starts to show the current value of input signal again If HdiS HOLD then setting parameter timE 0 0 causes holding peak value until ESC button is pressed If HdiS rEAL then value timE 0 0 means no holding Displaying peak value is signalized by flashing most right decimal point The relays LEDs and analogue outputs can be controlled depend on the current value of input signal or the peak value see HOLd menu a measure timE timE PEA TI U PEAY real measurement result time display value Figure 6 1 Process of peaks detection 16 User manual METER SRT N118 6 3 CONTROL OF THE RELAY OUTPUTS The control of the object measured signal is realized via relay outputs Front panel LEDs named R indicates the state of particular relay output If device is not equipp
20. decimal point included 31h Yes 999 999 HySt parameter in rEL1 menu no decimal point included modE parameter in rEL1 menu 32h Yes 0 5 0 noAC mode 1 on mode 2 oFF mode 3 in mode 4 out mode 5 modb mode 2 t on parameter in rEL1 menu expressed in tenth of seconds or SR ves ae tenth of minutes depend on unit parameter register no 35h 8 toFF parameter in rEL1 menu expressed in tenth of seconds sn we RZA or tenth of minutes depend on unit parameter register no 35h 35h Yes 0 1 unit parameter in rEL1 menu 0 seconds 1 minutes 36h Yes 0 2 AL parameter in rEL1 menu 0 no changes 1 on 2 off 37h Yes 999 9999 SEt2 parameter in rEL1 menu no decimal point included 38h Yes 999 9999 SEtP parameter in rEL2 menu no decimal point included 39h Yes 999 999 HySt parameter in rEL2 menu no decimal point included modE parameter in rEL2 menu 3Ah Yes 0 5 0 noAC mode 1 on mode 2 oF F mode 3 in mode 4 out mode 5 modb mode Z t on parameter in rEL2 menu expressed in tenth of seconds or SE veS Ras tenth of minutes depend on unit parameter register no 3Dh toFF parameter in rEL2 menu expressed in tenth of seconds SEN YES POR or tenth of minutes depend on unit parame
21. e of the parameter value is correct If switch parameter is being edited a short press of ENTER button causes of display a SEt ask When ENTER button is pressed again while SEt is displayed the new value of the parameter is stored in EEPROM memory ENTER Pressing this button operator can cancel the changes done up to now if they MENU were not approved by ENTER button after the SEt ask and come back to menu 7 3 MENU DESCRIPTION M WEI password checking If some password different from 0000 is set then every enter to main menu follows the entering of password If entered password is correct then first menu position will be displayed else warning Err and unit returns to measurement mode with special signs fm for m and t for K respectively However in user manual Due to problem with_direct displaying of m and K letters they are exchanged letters m and K are used to make it more readable example modE tc K 24 User manual METER SRT N118 7 3 1 rEL1 menu This menu allows to configure the operation mode of relays and LEDs marked R e g R1 If there are few relay outputs available then every output has its own configuration menu e g menu rEL2 for relay LED R2 Principle of the relays operation is described in paragraph CONTROL OF THE RELAY OUTPUTS 9 SEtP SEt2 HY
22. ed with one or more relay outputs menus refer to this relays D are available but apply to LED indicators only In such case LEDs indicates exceeding of particular thresholds Modes of the control can be changed depend on the values of parameters SEtP SEt2 HYSt modE t on toFF unit and AL Depend on modE parameter relays can be not used or controlled over one or two thresholds values If one threshold is used Figure 6 2 the relay can be turned on modE on or off modE oFF when the input signal value is contained in zone A If two thresholds are used Figure 6 3 the relay will be turned on when value of input signal is contained in zone A modE in or zone B modE out and turned off if the signal is contained in the second one state of relay LED SEtP parameter measure eet parameter Figure 6 2 One threshold control of the relay LED outputs state of relay LED ag or GET SB measure HYSt geet Figure 6 3 Two threshold control of the relay LED outputs The relay outputs and LEDs named R can be controlled depend on both the current value and the peak value when peak detection is active of the input signal 19 User manual METER SRT N118 6 3 1 One threshold mode Figure 6 4 presents the principle of relay outputs operation for one threshold mode and an example values of other
23. epend on both present measured value and peak value if peak detection is enabled Omod analogue output mode Depending on version of the device there are following options For active current output OFF current output disabled 0 20 current output enabled with 0 20 mA mode 4 20 current output enabled with 4 20 mA mode modb current output controlled via RS 485 interface For passive current output oFF current output disabled 4 20 current output enabled with 4 20 mA mode modb current output controlled via RS 485 interface For active voltage output OFF voltage output disabled 0 5 voltage output enabled with 0 5V mode 1 57 voltage output enabled with 1 5V mode 0 10 voltage output enabled with 0 10V mode 2 10 voltage output enabled with 2 10 V mode modb voltage output controlled via RS 485 interface 27 User manual METER SRT N118 OUtL this parameter determines the input value for which the output signal is minimal depend of output mode Omod OUtH this parameter determines the input value for which the output signal is maximal depend of output mode Omod The analogue output value is calculated due to formula given below where _ W OUtL HM TOU OUL x B A A W displayed value Out analogue output value B higher range limit 20mA 5V 10V
24. er manual METER SRT N118 Press ENTER at least 2 seconds to accept the changes after that question Set is displayed and user must to confirm or cancel the changes To conform changes and story it in EEPROM press ENTER button shortly after SEt is displayed To cancel the changes press ESC button shortly after SEt is displayed After that device returns to the menu 7 2 3 Switch parameters LIST type Switch parameters can be described as a sets of values a lists out of which only one of the options available on the list can be selected for the given parameter Options of switching parameter are selected using v keys Short pressing of ENTER causes in displaying of the acknowledge question SEt If key ENTER is pressed again the changes are accepted stored in EEPROM end the edition process finished Pressing the key ESC after SEt causes in cancelling of made changes and returning to menu Functions of buttons when editing numeric and switching parameters While editing numeric parameter change of current flashing digit slide change of value acceleration deceleration direction change While editing switch parameter selection of switch parameter If numerical parameter is being edited a short press of ENTER button change edited position A long press of ENTER button at lest 2 sec causes of display a SEt ask which allow user to make sure if chang
25. et the access to this option special password is required 5465 next the device displays acknowledge question SEt Press ENTER to acknowledge the restoring of factory settings or ESC to cancel 7 3 10 SErv menu This menu contains the parameters for authorized service only To enter this menu proper service password must be entered Improper settings can causes of damage of the device 31 User manual METER SRT N118 7 4 MENU STRUCTURE 32 _____ Measurement mode Press and hold at least 2 seconds Est 0 4 digit user password entering if it is different from 0000 S S Parameter Y pr 2 Ka Parameter Lk OUP a gt Omod edition T r SG Ve KRESEK SSE e OUtL II OUtH j EI Lor II E e z L Parameter H HIS bi bri boss edition t T SS AL i T See next page gt ol rEL1 CG z SEtP es edition V j GE LES e Options similar pa A I 7 to rEL1 menu lt HYSt l mm modE a ton II e toFF I t rei unit II AL II EJ L Z inPt type Lon lela c r S8 lt FILL li lt toFS jj User manual METER SRT N118 See previous page
26. exceed the recommended values In such cases forced cooling of the unit must be considered e g by using a ventilator The unit is designed for operation in an industrial environment and must not be used in a household environment or similar 2 GENERAL CHARACTERISTICS The SRT N118 meter is equipped with Pt 100 Pt 500 Pt 1000 type input with automatic connection recognition three or four wire sensor The measurement range spans from 100 C to 600 C and input is fully linearised accordingly to PN EN60751 A2 1999 standard Result is showed on 4 digit LED display The device can be equipped with two relay or OC type outputs Optionally SRT N118 with one relay or OC type output can be equipped with active current output passive isolated current output or active voltage output Device SRT N118 is equipped with RS 485 Modbus RTU communication interface and 24V 100mA supply output for free use The meter can be ordered in two power supply versions The device has 4 buttons being used for main presets programming To get high protection level the keyboard is mounted under transparent cover To allow user to change presets without opening the cover an IR sensor is mounted Remote controller keyboard is equivalent to the device keyboard Note that remote controller is not a part of the SRT N118 set it is an additional equipment SRT N118 can be used for controlling and regulation of processes need proportional and threshold co
27. f current position flashing digit or the sign Short pressing of the ENTER button causes change of the position digit Press ENTER at least 2 seconds to accept the changes after that question SEt is displayed and user must to confirm or cancel the changes To conform changes and story it in EEPROM press ENTER button shortly after SEt is displayed To cancel the changes press ESC button shortly after SEt is displayed After that device returns to the menu 7 2 2 Numeric parameters slide change mode In slide change mode Edit Slid buttons and v has different functions To increase edited value press or press and hold button only the increasing became quickest as long as button is pressed To slow down the increasing button v can be used If v is pressed shortly and button is still pressed increasing slow down for a moment only if v is pressed and held while button 4 is still pressed the increasing slow down and will be kept on lower speed To decrease edited value press or press and hold v button only The decreasing became quickest as long as button v is pressed To slow down the decreasing button can be used If is pressed shortly and button v is still pressed decreasing slow down for a moment only if is pressed and held while button v is still pressed the decreasing slow down and will be kept on lower speed 23 Us
28. is state relay operation mode noAC the relay is not active permanent turned off on one threshold mode the relay is turned ON when input signal exceeds SEtP HYSt value and is turned off back when the input signal became lower than SEtP HYSt OFF one threshold mode the relay is turned OFF when input signal exceeds SEtP HYSt value and is turned on back when the input signal became lower than SEtP HYSt in two threshold mode the relay is turned ON when the input signal is bigger than lower threshold HYSt and lower than bigger threshold HYSt and turned off when the input signal is contained in the second zone The bigger threshold means bigger one of SEtP and SEt2 thresholds the lower threshold means lower one of SEtP and SEt2 thresholds 25 User manual METER SRT N118 L t on toFF unit AL 26 out two threshold mode relay is turned ON when the input value is bigger than bigger threshold HYSt and lower than lower threshold HYSt and turned on when the input signal is contained in the second zone The bigger threshold means bigger one of SEtP and SEt2 thresholds the lower threshold means lower one of SEtP and SEt2 thresholds modb the relay is controlled via RS 485 interface independently on the input signal e LEDs light when
29. isplaying of the peak drop value can be set from 0 0 to 19 9 sec with 0 1 sec resolution If HdiS HOLD then setting parameter timE 0 0 causes holding peak value until ESC button is pressed If HdiS rEAL then value timE 0 0 means no holding HdiS type of displayed values rEAL current value is displayed HOLd peak drop value is displayed H r1 H r2 relay LED outputs R1 R2 operation mode rEAL relay LED operates depend on the current value HOLd relay LED operates depend on the peak drop value HOUt current output operation mode rEAL current output operates depend on the current value HOLd current output operates depend on the peak drop value 29 User manual METER SRT N118 7 3 6 SECu menu This menu contains presets connected with availability of other parameters Scod user password 4 digits number If this parameter is set at value 0000 user password is turned off If the user do not remember his password the access to the menu is possible by the one use password To get this password please contact with Marketing Division Single use password can be used only one time after that it is destroyed Entering this password causes in clearing of user password it means sets the user password to 0000 The one use password can be used ONE TIME ONLY it is impossible to use it
30. n input value exceeds over or under border value and ta ts Je to times Figure 6 4 are bigger than the time defined by parameters t on toFF and unit Border values means values equal threshold hysteresis and threshold hysteresis respectively If t on and toFF parameters are set to 0 then the relay state will be changed as soon as input value exceeds any of the border values see points A and C Figure 6 4 a b c If values of t on or and toFF are positive then relay state will be turned on if the input value exceeds the border values and stay bigger or lower during at least t on see points Bon Don Figure 6 4 a d e Similarly the relay will be turned off if time toFF elapse since the input signal value exceeds any of the border values see points Borr Dorr Figure 6 4 a d e If tA tB IC or tD when input signal stay in zone A or zone B are lower than parameters t on or toFF the relay will not change his state see points A and C Figure 6 4 a d e 20 User manual METER SRT N118 The state of relay output while the input value exceeds the border values points A B C D is described by parameter modE The relay can be turned on modE on or turned off modE oFF when input signal value is contained in zone A Figure 6 4 a The parameter AL allow user to set the relay output behaviour in critical situ
31. n via RS 485 and access settings The meaning of the particular parameters is described in paragraph MENU DESCRIPTION Some of the parameters can be accessed without menu entering quick view mode After pressing or v button name of the threshold e g rEL1 and his value will be displayed on the display in alternating mode If or v will be pressed in 5 sec again the next threshold will be displayed else the device comes back to the measurement mode If a free access is enabled see description of SECu menu user can change the value of particular threshold pressing button ENTER see PARAMETERS EDITION new value is displayed in alternating mode with parameter name by few seconds Confirmed changes may be checked or user can switch viewed parameter pressing 4 or v button If particular parameter has been changed and confirmed in quick view mode its 7 1 PROGRAMMING MENU To enter main menu being in the measurement mode operator must to press and hold at least 2 sec ESC MENU button If the user password is defined see parameter Scod menu SECU operator have to enter correct one before proceeding to menu options Entering of the passwords is similar to the edition of numeric parameters see PARAMETERS EDITION however presently editing digit is showed only on the display other digits are replaced by sign After entering of last digit of the password first menu position
32. nfiguration registers on 30 mbtO Maximum delay between received messages 0 30 rESP Additional delay of answer transmission Std 30 42 User manual METER SRT N118 Parameter Description Default value User s value pec Configuration of numerical parameters edition Edit Numerical parameters edit mode dig 31 43 D simex SIMEX Sp z 0 0 ul Wielopole 11 80 556 Gda sk Poland tel 48 58 762 07 77 fax 48 58 762 07 70 http www simex pl e mail infoQsimex pl
33. ning the power supply on device ID and software version are showed on the display next the controller goes to the measurement mode 6 1 MEASUREMENT MODE In the measure mode the measurement results are displayed on the display If the result of measurement exceeds the permissible measurement range warning Hi or Lo is displayed rather than calculated result depends on exceeded value The warning can be effect of measurement circuit malfunction In that case Loi means shortcut and Hi means break of measurement circuit 17 User manual METER SRT N118 In the measurement mode user can check main thresholds values After pressing or v button name of the threshold e g rEL1 and his value will be displayed on the display in alternating mode If or v will be pressed in 5 sec again the next threshold will be displayed else the device comes back to the measurement mode If a free access is enabled see description of SECu menu user can change the value of particular threshold pressing button ENTER see PARAMETERS EDITION All accessible parameters can be changed by entering the menu see DEVICE PROGRAMMING Use the local keyboard or the remote controller to do it Note all parameters can be remote changed via RS 485 interface Configuration of the device via menu or RS 485 interface does not stop measures 6 2 DETECTION OF THE PEAK VALUES The SRT N118 controller is equippe
34. ntrol like temperature processes heating or cooling valves controlling or other User manual METER SRT N118 3 TECHNICAL DATA Power supply voltage depending on version External fuse required Power consumption 85 230 260V AC DC 50 60 Hz separated or 19 24 50V DC and 16 24 35V AC separated T type max 2A max 5 VA 85 260V AC DC max 5 VA 16V 35V AC max B W 19V 50V DC Measurement input Measurement range Measurement accuracy Measurement wires resistance Pt 100 Pt 500 Pt 1000 type with automatic connection recognition 3 or 4 wires 100 C 600 C 0 1 25 C one digit max 20 Q every wire Sensor power supply output 24V 5 10 max 100 mA stabilized Relay output 0 1 or 2 NO 1A 250V AC cos 1 OC type output 0 1 or 2 30mA 30VDC 100mW Active current output optional for one relay or one OC type output version only Load resistance max range max 0 24 mA 700 Q Passive isolated current output optional for one relay or one OC type output version only Supply voltage Load resistance max range max 2 8 24 mA Us 9 5 36V Us 9 5V 24mA kQ Active voltage output optional for one relay or one OC type output version only Load resistance min range max 0 11V 2000 Q Temperature stability 50 ppm C User manual METER SRT N118 Communication inte
35. nts User manual METER SRT N118 110 mm 67 mm lt gt p 90 mm d o e 80 mm 60 mm b R sk SSE s Figure 4 1 Device and assembly dimensions 4 3 CONNECTION METHOD Caution AN Installation should be conducted by qualified personnel During installation all available safety requirements should be considered The fitter is responsible for executing the installation according to this manual local safety and EMC regulations The unit is not equipped with an internal fuse or power supply circuit breaker Because of this an external time delay cut out fuse with a small nominal current value must be used recommended bipolar max 2A and a power supply circuit breaker located near the unit In the case of using a monopolar fuse it must be mounted on the phase cable L The power supply network cable diameter must be selected in such a way that in the case of a short circuit of the cable from the side of the unit the cable shall be protected against destruction with an electrical installation fuse Wiring must meet appropriate standards and local regulations and laws In order to secure against accidental short circuit the connection cables must be terminated with appropriate insulated cable tips Tighten the clamping screws The recommended tightening torque is 0 5 Nm Loose screws can cause fire or defective operation Over tightening can lead to dam
36. o modb the critical situation means communication delay when no data is received longer than mbtO parameter see description rS menu User manual METER SRT N118 e If option noCH is selected for AL parameter behaviour of the relay may 1 depend on FiLt parameter in some cases If FiLt is set to big value and the input signal drops result value of the measure will change slow causes of turning on or off relay due to thresholds values The critical situation is slowly detected so it is impossible to predict the relay state in that situations e If parameter AL on the relay will be turned on in the critical situations even if his parameter modE noAC 7 3 2 inPt menu This menu presets the measurement input tYPE type of the input sensor This parameter can be set to values Pt 1 Pt 100 input Pt 5 Pt 500 input PO Pt 1000 input ELO this parameter sets filtration rate It can be set to values from O no filtration to 5 strongest filtration time window about 2 sec toFS offset expressed in 0 1 C range 9 9 C This parameter allows shifting of measurement scale and express value added to calculated measured result 7 3 3 OQutP menu This menu contains parameters of analogue output control Menu is available if the device is equipped witch analogue output Analogue output can be controlled d
37. omagnets motors etc it is required to use additional suppression circuit typically capacitor 47nF min 250VAC in series with 100R 5W resistor connected in parallel to relay terminals or better directly on the load In consequence of using the suppression circuit the level of generated electromagnetic disturbances is lower and the life of relay contacts rises 14 User manual METER SRT N118 a N Figure 4 14 Examples of suppression circuit connection a to relay terminals b to the inductive load Uo OC1 Logic controller voltage input 24V Figure 4 15 Example of OC type outputs connection ACTIVE Current output H Logic controller Current input 0 20 mA Figure 4 16 Example of active current outputs connection for device with active current output only 15 User manual METER SRT N118 PASSIVE Uo Current output Logic controller Isolation loss Current input 4 20mA Figure 4 17 Example of passive current outputs connection for device with passive current output only ACTIVE voltage output 413 Logic controller voltage input 0 10V Figure 4 18 Example of active voltage outputs connection for device with active voltage output only 4 4 MAINTENANCE The unit does not have any internal replaceable or adjustable components available to the user Pay attention to the ambient temperature
38. onnected to GND connector The unit must be properly set up according to the application Incorrect configuration can cause defective operation which can lead to unit damage or an accident If in the case of a unit malfunction there is a risk of a serious threat to the safety of people or property additional independent systems and solutions to prevent such a threat must be used The unit uses dangerous voltage that can cause a lethal accident The unit must be switched off and disconnected from the power supply prior to starting installation of troubleshooting in the case of malfunction Neighbouring and connected equipment must meet the appropriate standards and regulations concerning safety and be equipped with adequate overvoltage and interference filters Do not attempt to disassemble repair or modify the unit yourself The unit has no user serviceable parts Defective units must be disconnected and submitted for repairs at an authorized service centre User manual METER SRT N118 Do not use the unit in areas threatened with excessive shocks vibrations dust humidity corrosive gasses and oils Do not use the unit in areas where there is risk of explosions Do not use the unit in areas with significant temperature variations exposure to condensation or ice Do not use the unit in areas exposed to direct sunlight Make sure that the ambient temperature e g inside the control box does not
39. output 0 0 28 OUtH Display value for 20 mA current output 100 0 28 Lo r Extension of the bottom of the nominal output 5 0 28 range Hi r Extension of the top of the nominal output range 5 0 28 AL Current output value on critical exception 22 1 mA 28 Active voltage output configuration OUtP menu Omod Active voltage output mode 0 10 V 27 OUtL Display value for 0 V 1 V or 2 V voltage output 0 0 28 OUtH Display value for 5 V or 10 V voltage output 100 0 28 Lor Extension of the bottom of the nominal output 5 0 28 range Hi r Extension of the top of the nominal output range 5 0 28 AL Voltage output value on critical exception 11 0 V 28 Display parameters bri Display brightness bri6 29 Configuration of peaks detection function HOLd menu modE Kind of detected changes norm 29 PEA Minimum detected change 0 0 29 timE Maximum time of peak displaying 0 0 29 HdiS The type of displayed value HOLd 29 Hr Source of relay R1 and LED R1 control rEAL 29 H r2 Source of relay R2 and LED R2 control rEAL 29 HOut Source of current output control rEAL 29 Settings of access to the configuration parameters SECu menu Art Permission to changes of relay R1 threshold on 30 without of the user password knowledge A r2 Permission to changes of relay R2 threshold on 30 without of the user password knowledge RS 485 interface configuration menu rS Addr Device address 0 30 bAud Baud rate 9 6 30 mbAc Permission to changes of co
40. r supply depending Figure 4 8 Terminals description relay and passive current outputs 12 11 10 OC1 Umax 30V DC Imax 30mA Pmax 100m Passive isolated oci ezma RS 485 option option Pt100 500 1000 E G H H HO EEL Uo 24V 5 10 Imax 100 mA depending on version Pt100 500 1000 Power supply Figure 4 9 Terminals description OC type and passive current outputs User manual METER SRT N118 12 11 10 ACTIVE R1 option voltage output RS 485 option Pt100 500 1000 mage siz nio s 8 7 6T5 4 3 2T1 Q p 5 A g 24V 5 10 Imax 100 mA Pt100 500 1000 depending on version Power supply Figure 4 10 Terminals description relay and active voltage outputs 12 11 10 OC1 Umax 30V DC Tmax 30mA Pmax 100mw ACTIVE OC voltage output RS 485 option option Pt100 500 1000 gt 4 cer EGET ES EEN EEL Uo 24V 5 10 Imax 100 mA depending on version Pt100 500 1000 Power supply Figure 4 11 Terminals description OC type and active voltage outputs Temperature sensor can be connected to the device in typical 4 wire circuit Figure 4 12a or 3 wire circuit Figure 4 12b Due to precision of measurement 4 wire circuit is recommended Figure 4 12c 4 wires circuit with shorted pins 12 11 and 10 9 In this case the
41. re 6 5 Principle of LED relay output operation for two thresholds mode 21 User manual METER SRT N118 Figure 6 5 presents the principle of relay outputs operation for two thresholds mode and an example values of other parameters In this mode parameter SEt2 is accessible in common with SEtP this parameter describes a second threshold of the relay output The parameters HYSt modE ton toFF unit and AL are connected with both SEtP and SEt2 thresholds While the controlling process the relay output changes his state depends of both SEtP and SEt2 thresholds in similar way as it was described in one threshold mode If two threshold mode is used modE parameter defines state of the relay output when the input value occurs in a particular zone defined by border values of both thresholds The relay can be turned on if the input value is contained in zone A modE in or zone B modE out and turned off if it is contained in the second one Figure 6 5 The sequence of thresholds SEtP and SEt2 can be set in any order due to the control of relay outputs is done depend on difference between thresholds values zone A and outside of threshold values zone B 7 DEVICE PROGRAMMING The device menu allow user to set all parameters connected to operation of measurement input control modes critical situations behaviour communicatio
42. reened signal cables is recommended Signal cable screens should be connected to the earthing only at one of the ends of the screened cable In the case of magnetically induced interference the use of twisted pair of signal cables is recommended Twisted pair best if shielded must be used with RS 485 serial transmission connections In the case of measurement or control signals are longer than 30m or go outside of the building then additional safety circuits are required In the case of interference from the power supply side the use of appropriate interference filters is recommended Bear in mind that the connection between the filter and the unit should be as short as possible and the metal housing of the filter must be connected to the earth with the largest possible surface The cables connected to the filter output must not be run with cables with interference e g circuits controlling relays or contactors Connection of the power supply and the measurement and controlling signals should be made by clamping connectors mounted inside the housing b ul 5mm max 1 6 mm Figure 4 2 Recommended dimensions of cable stripping a for big connectors 1 to 6 b for small connectors 7 to 16 User manual METER SRT N118 Figure 4 3 Method of connecting cables to the clamping connectors A All connections must be made while power supply is disconnected 12 11 10 R1 option ai RS 485 AM Pt100 5
43. relays are closed independently of relays mode e When power supply fail unit do not store relays state selected by RS 485 interface turn on delay time the relay is turned on with delay equal t on if the input value exceeds appropriate border value defined with threshold and hysteresis at least t on time t on range 0 99 9 defined with 0 1 sec resolution Unit of this parameter is set by unit parameter turn off delay time the relay is turned off with delay equal toFF if the input value exceeds appropriate border value defined with threshold and hysteresis at least toFF time toFF range 0 99 9 defined with 0 1 sec resolution Unit of this parameter is set by unit parameter If time when the input signal exceeds some border value is shorter than t on or toFF time the relay do not change its state see paragraph CONTROL OF THE RELAY OUTPUTS unit of time for t on i toFF parameters Can be set on one of two values min minutes SEC seconds this parameter defines the relay reaction when some critical situations occurs noCH relay do not change his state on relay will be turned on OFF relay will be turned off If parameter modE is set to on oFF in or Out the critical situation means that allowable measurement range is exceeded If parameter modE is set t
44. rent output enabled with 4 20mA mode 2 current output controlled via RS 485 interface Omod parameter in OUtP menu active voltege output mode 0 voltage output disabled 1 voltage output enabled with 0 5V Yes 0 5 mode 2 voltage output enabled with 1 5V mode 3 voltage output enabled with 0 10V mode 4 voltage output enabled with 2 10V mode 5 voltage output controlled via RS 485 interface A1h Yes 999 9999 OUtL parameter in OUtP menu no decimal point included A2h Yes 999 9999 OUtH parameter in OUtP menu no decimal point included Lo r parameter in OUtP menu for active current output and Yes 0 999 9 d 8 p active voltage output expressed in 0 1 Yes 0 299 Lo r parameter in OUtP menu for passive current output expressed in 0 1 Yes 0 199 Hi r parameter E menu for active and passive current output expressed in 0 1 A4h Yes 0 99 Hi r parameter in OUtP menu for active voltage output expressed in 0 1 Yes 0 3 AL parameter in OUtP menu active current output value on critical exception 0 no change 1 22 1 mA 2 3 4 mA 3 0 mA Yes 0 2 AL parameter in OUtP menu passive current output value on A5h j critical exception 0 no change 1 22 1 mA 2 3 4 mA AL parameter in OUtP menu active voltage output value on Yes 0 5 critical exception 0 no change 1 11 V 2 5 5 3 1 2 V
45. resistance of wires should be as small as possible to avoid of measurement errors Measured value can be corrected constant correction using toFS parameter from menu inPt Due to low precision 2 wire connection is not recommended D If 2 wire circuit is used it is recommended to connect sensor accordingly to When 4 wires or 2 wires connection is used the resistance of particular wires Ra Rd CAN BE DIFFERENT When 3 wires connection is used the resistance of particular wires Ra Rd MUST BE IDENTICAL to enable proper compensation of it s resistance The resistance of particular wire should not be greater than 20 Q 13 User manual METER SRT N118 a b c Ra Rb Re Rd Pt100 Pt100 Pt100 Ra Rb Rc Rd can be different Ra Rb Rc Rb Rc can be different Figure 4 12 Connection of sensors a 4 wires circuit b 3 wires circuit c 2 wires circuit The connection circuit should not be changed while unit is powered Every change of connection while the unit is powered causes measurement errors by several seconds after change Depending on version 85 230 260V AC DC 50 60 Hz or 19 24 50V DC and 16 24 35V AC N L Figure 4 13 Connection of power supply and relays Contacts of relay outputs are not equipped with spark suppressors While use AY the relay outputs for switching of inductive loads coils contactors power relays electr
46. rface Baud rate Display depending on version Data memory Protection level Housing type Housing material Housing dimensions without glands with glands Operating temperature Storage temperature Humidity Altitude Screws tightening max torque Max connection leads cross section Safety requirements EMC RS 485 8N1 and 8N2 Modbus RTU not separated 1200 bit s 115200 bit s LED 4 digit 20mm height red or LED 4 digit 38mm height green non volatile memory EEPROM type IP 67 wall mounted ABS fibreglass 110x80x67 mm 110 x 105 x 67 mm 0 C do 50 C or 20 C to 50 C 10 C do 70 C or 20 C to 70 C 5 to 90 no condensation up to 2000 meters above sea level 0 5 Nm 3 mm for connectors 1 6 or 2 mm for connectors 7 16 according to PN EN 61010 1 installation category II pollution degree 2 voltage in relation to ground 300V AC insulation resistance gt 20MQ insulation strength between power supply and input output terminal 1min 2300V insulation strength between relays terminal 1min 1350V according to PN EN 61326 1 This is a class A unit In a residential or a similar area it can cause radio frequency interference In such cases the user can be requested to use appropriate preventive measures User manual METER SRT N118 4 DEVICE INSTALLATION The unit has been designed and manufactured in a way assuring a high level of user safet
47. rrent will not change 22 1 current will be set to 22 1 mA 3 4 current will be set to 3 4 mA 0 0 current will be set to 0 mA User manual METER SRT N118 For passive current output noCH current will not change 22 1 current will be set to 22 1 mA 3 4 current will be set to 3 4 mA For active voltage output noCH voltage will not change 11 0 voltage will be set to 11 V 5 5 voltage will be set to 5 5 V 1 2 voltage will be set to 1 2 V 0 6 voltage will be set to 0 6 V 0 0 voltage will be set to 0 V When the critical situation goes the output signal will be set to value calculated due to formulas given above 7 3 4 bri parameter This parameter allows user to set bright of the LED display bright can be set to conventional values from 1 to 8 7 3 5 HOLd menu This menu contains parameters connected with peak detection function See also full description of the peak detection function in paragraph DETECTION OF THE PEAK VALUES modE the type of detected changes of the input signal can be set to values nom peaks peak and next drop of the input signal of value equal at least PEA invi drops drop and next peak of the input signal of value equal at least PEA PEA minimal detected signal change classified as peak or drop see Figure 6 1 timE maximum time of d
48. ter register no 3Dh 3Dh Yes 0 1 unit parameter in rEL2 menu 0 seconds 1 minutes 3Eh Yes 0 2 AL parameter in rEL2 menu 0 no changes 1 on 2 off 3Fh Yes 999 9999 SEt2 parameter in rEL2 menu no decimal point included 50h Yes 0 1 modE parameter in HOLd menu type of detected changes 0 peaks 1 drops 51h Yes 0 9999 PEA parameter in HOLd menu minimum detectable change no decimal point included 52h Yes 0 199 timE parameter in HOLd menu maximum peaks or drops display time expressed in seconds HdiS parameter in HOL d menu RA ER 0 1 0 rEAL mode 1 HOLd mode M H r1 parameter in HOLd menu AE 1 vee O 1 0 rEAL mode 1 HOLd mode A H r2 parameter in HOLd menu SA Yes 0 1 0 rEAL mode 1 HOLd mode 36 User manual METER SRT N118 WON Register Write Range Register description HOUt parameter in HOLd menu 1 A mee SC 0 rEAL mode 1 HOLd mode Omod parameter in OUtP menu active current output mode Yes 0 3 0 current output disabled 1 current output enabled with 4 20mA i mode 2 current output enabled with 0 20mA mode 3 current output controlled via RS 485 interface Omod parameter in OUtP menu passive current output mode AOh Yes 0 2 0 current output disabled 1 cur
49. will be displayed if the password is correct or warning Er in other case AY Pay attention when device parameters are being changed If it is possible turn off controlled installation machine 22 User manual METER SRT N118 Functions of the buttons while sub menu and parameters choice Selection of sub menu or parameter for editing Name of selected item sub menu or parameter is displayed Operation of ENTER button depend on present menu position s if the name of some sub menu is displayed enter this sub menu name of the first parameter or next level sub menu is displayed e if the name of some parameter is displayed enter the edition of this parameter present value of the parameter is displayed ENTER ESC MENU button allow user to exit present menu level and goes to upper MENU level menu or measurement mode GD After about 1 min since last use of the buttons device exits the menu mode and returns to the measurement mode only if no parameters are in editing mode 7 2 PARAMETERS EDITION To start edition of any parameter user should select name of desired one using v buttons and then press ENTER 7 2 1 Numeric parameters digit change mode Numerical parameters are displayed as decimal numbers The mode of its new value entering depends on chosen edit method see parameter Edit In mode by digit Edit dig pressing one of the keys or v causes change o
50. working range 3 8 21 mA b D 20 5 According to formula from page 28 lout 20 5 10 0 20 0 10 0 x 16 mA 4 mA 1 05 16 4 20 08 mA Calculated lar do not exceeds the output working range 3 8 21 mA c D 30 0 According to formula from page 28 lout 30 0 10 0 20 0 10 0 x 16 MA 4 mA 2 16 4 36 mA Calculated lou exceeds the output working range 3 21 mA so current output will generate current equal to the upper border of range defined by parameter Lo r and Hi r it means 21 mA 10 THE MODBUS PROTOCOL HANDLING Transmission parameters 1 start bit 8 data bits 1 or 2 stop bit 2 bits are send 1 and 2 bits are accepted when receive no parity control Baud rate selectable from 1200 to 115200 bits second Transmission protocol MODBUS RTU compatible The device parameters and display value are available via RS 485 interface as HOLDING type registers numeric values are given in U2 code of Modbus RTU protocol The registers or groups of the registers can be read by 03h function and wrote by 06h single registers or 10h group of the registers accordingly to Modbus RTU specification Maximum group size for 03h and 10h functions can not exceeds 16 registers for single frame GD The device interprets the broadcast messages but then do not sends the answers 10 1 LIST OF REGISTERS 34 User manual METER SRT N118
51. y and resistance to interference occurring in a typical industrial environment In order to take full advantage of these characteristics installation of the unit must be conducted correctly and according to the local regulations AY Read the basic safety requirements on page 3 prior to starting the installation Ensure that the power supply network voltage corresponds to the nominal voltage stated on the unit s identification label The load must correspond to the requirements listed in the technical data All installation works must be conducted with a disconnected power supply Protecting the power supply connections against unauthorized persons must be taken into consideration 4 1 UNPACKING After removing the unit from the protective packaging check for transportation damage Any transportation damage must be immediately reported to the carrier Also write down the unit serial number located on the housing and report the damage to the manufacturer Attached with the unit please find user s manual warranty 4 2 ASSEMBLY AN Disconnect the power supply prior to starting assembly Check the connections are wired correctly prior to switching the unit on dimensions of the device and distances between holes The back side of the device has four mounting holes This part of the case should be mounted to a wall by screws i To install device on the wall a pinholes should be made Figure 4 1 prese
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