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Wecon LX3V-8ITC Скачать руководство пользователя страница 15

LX3V-8iTC

14

WECON Technology Co., Ltd.

9.

EMC Measures

Electromagnetic compatibility or EMC must be considered before using LX3V - 8iTC.

If some form of cable protection is used, "shield

" must be connected to the ground

terminal, as shown in section 3.

Due to the very weak analogue signal, it will lead to EMC noise error if EMC precautions are not

taken seriously, with error value up to ± 10% of actual value. This situation is very bad. Users can get

the desired operation in normal allowable range only by taking good precautions.

EMC measures should include the selection of high quality cables that are well wired to avoid

potential sources of noise.

In addition, signal averaging is recommended to reduce the "puncture" effect of random noise.

Version: V1.0.0

Date: Aug 2018

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Содержание LX3V-8ITC

Страница 1: ...LX3V 8ITC User manual Website http www we con com cn en Technical Support support we con com cn Skype fcwkkj Phone 86 591 87868869 QQ 1043098682 Technical forum http wecon freeforums net ...

Страница 2: ...eadable data to store in the main processing unit MPU The temperature is readable in degrees Celsius or Fahrenheit All data transfer and parameter settings can be adjusted by WECON PLC Editor software FROM TO instruction can be used for reading and writing data As input sensor the eight channels are free to match with any one of the thermocouple K J T E N B R S type when eight thermocouple input p...

Страница 3: ...error Terminal Description Terminal Description 24V Connect to the positive terminal of 24V power supply L Connect to the positive signal wire of thermocouple 24V Connect to the negative terminal of 24V power supply L Connect to the negative signal wire of thermocouple 3 Wiring Use the crimp terminals that meet the dimensional requirements showed in the left figure Apply 0 5 to 0 8 N m 5 to 8 kgf ...

Страница 4: ... the power supply is not cut off 2 Make sure to interlock external loads outside PLC and LX3V and through the PLC program for it may be dangerous when they are connected simultaneously 3 Connect the LX3V 8iTC and PLC power supply properly according to the instructions in this manual If the AC power is connected to the DC I O terminal or the DC power supply terminal the PLC may be destroyed 4 Do no...

Страница 5: ...2000 to 4000 Type T from 3280 to 7520 Type E from 2000 to 10000 Type E from 3280 to 18320 Type N from 2000 to 13000 Type N from 3280 to 23720 Type B 2500 to 18200 Type B 4820 to 33080 Type R from 500 to 17680 Type R from 580 to 32144 Type S from 500 to 17680 Type S from 580 to 32144 12 bit conversion stored as 16 bit binary complement Measurement accuracy Type K 0 4 o C Type K 0 72 o F Type J 0 3 ...

Страница 6: ...nel Unused channels are not converted Note Grounding thermocouples are not suitable for use with this unit Analog input Conversion Characteristics Readings respectively given at the calibration reference point 0 C 32 F 0 320 Subject to the overall accuracy Miscellaneous Item Specification Isolation It has optical isolation between analog and digital circuits DC DC converter is applied to isolate b...

Страница 7: ...0 1 degrees Celsius 9 12 49 52 Current temperat ure o C R X 0 The current value of various temperatures in unit of 0 1 degrees Celsius 13 16 53 56 Average temperat ure o F R X 0 The average value of various temperatures in unit of 0 1 degrees Fahrenheit 17 20 57 60 Current temperat ure o F R X 0 The current value of various temperatures in unit of 0 1 degrees Fahrenheit 21 25 61 65 Cold end temper...

Страница 8: ...ich 27 controls the first 4 channels and 67 controls the last 4 channels The control of BFM26 BFM66 and BFM27 BFM67 do not affect each other 28 68 Error latch R X 0 The value range is incorrectly latched 29 69 Error code 0 Error state 30 70 Identifica tion code Identification number K2038 31 71 Version number Communication board software version number 32 72 Version number Acquisition board softwa...

Страница 9: ... assigned to BFM 1 to BFM 4 and the averaged sample values of the 5th to 8th channels are assigned to BFM 41 to BFM 44 Only the range of 1 to 4096 is valid The overflowed value will be ignored Use 8 as the default value Some of the most recently converted readable values are averaged to give a smoothed readable value The average Celsius data is stored in BFM 5 to BFM 8 and BFM 45 to BFM 48 The ave...

Страница 10: ...2 CH6 CH1 CH5 Low latch ON when the temperature measurement drops and is below the minimum measurable temperature limit High turn on ON when the temperature measurement rises and is above the maximum temperature limit or when the thermal resistance is off If an error occurs disconnect the sensor the temperature data before error is latched If the measured return value is within valid range the tem...

Страница 11: ...M 70 Use FROM instruction to read the ID code or ID number of special function module from the buffer memory BFM 30 or BFM 70 The ID code of LX3V 8iTC unit is K2038 Use this ID code in the user program of programmable controller to confirm this special function module before transmitting receiving data 6 System Block Diagram 7 Sample Program In the program shown below the LX3V 8iTC module occupies...

Страница 12: ...end mode CH3 freezing cold end mode CH4 external cold end mode CH5 built in cold end mode CH6 built in cold end mode CH7 freezing cold end mode CH8 external cold end mode 3 BFM 30 D10 of the module NO 2 When K2038 D10 M1 ON that is when the ID code is K2038 M1 ON The initialization step checks if the special function module in position 2 is LX3V 8iTC that is if its unit ID code is K2038 BFM 30 BFM...

Страница 13: ...D0 to D3 and D4 to D8 8 Diagnosis 8 1 Initial Check 1 Check if the input output wiring and or extension cable are connected to the LX3V 8iTC analog special function module 2 Check does not violate the system configuration rules of LX3V for example the number of special function modules cannot exceed 8 and the total number of system I O points cannot exceed 256 3 Make sure the correct operating ran...

Страница 14: ...e if power supply is normal 3 Check the state of A D LED lamp COM lamp On A D conversion is operating normally Otherwise Check buffer memory BFM 29 error state If any bit b2 and b3 is in ON state that is why the A D LED lamp goes out 8 3 Check the Number of Special Function Modules Other special modules that use FROM TO instruction such as analog input modules analog output modules and high speed ...

Страница 15: ...l it will lead to EMC noise error if EMC precautions are not taken seriously with error value up to 10 of actual value This situation is very bad Users can get the desired operation in normal allowable range only by taking good precautions EMC measures should include the selection of high quality cables that are well wired to avoid potential sources of noise In addition signal averaging is recomme...

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