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Megmeet MTC-08-NT User Manual

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MTC-08-NT Thermostat User Manual
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V1.0
Archive time 2012.7

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  • Page 1 MTC-08-NT Thermostat User Manual Version V1.0 Archive time 2012.7...
  • Page 2 Shenzhen megmeet control technology co., ltd. provides customers with a full range of technical support, users can contact with the nearest agents or technical service center of Shenzhen megmeet control technology co., ltd., or directly with the headquarters of the company.

  • Page 3: Model Description

    Model Description M TC TT:Indicates transistor temperature control output Input method N: No CT (Current test) Input The number of temperature channels collected by the module Thermostat Megmeet...

  • Page 4: Product Introduction

    1.Product Introduction MTC-08-NT temperature controller is a multi - channel high precision temperature control product developed by megmeet, suitable for various occasions of temperature control. Its main features are compatible with thermocouple and thermal resistance, high precision temperature measurement, rich functions, easy to use. This chapter introduces the appearance structure, installation size, parts, technical parameters, buffer and accessories of MTC-08-NT.

  • Page 5: Light Description

    MTC-08-NT user terminal is shown in figure 1-3 Figure 1-3 MTC-08-NT user terminal diagram The definition of MTC-08-NT user terminal is shown in table 1-1 Table 1-1 MTC-08-NT terminal definitions Mark Definition 24V－ Power supply 24V positive 24V+ Power supply 24V negative Ground 485－...

  • Page 6: Technical Parameter

    ON The corresponding channel output is OFF 1.4 Technical parameter 1.4.1 Power indicator The power specifications of MTC-08-NT are shown in Table 1-3. Table 1-3 Power indicator Project Instruction 24Vdc (-15% ～ 20%), the maximum allowable ripple voltage Power 5%, maximum power consumption 120mA.
  • Page 7 6. Litre/temperature limit setting. 7. Save and set BFM parameters. 8. The other. 1.5.1 Channel operation monitoring The channel operation monitoring content of the buffer zone (BFM) of MTC-08-NT is shown in Table 1-5 Table 1-5 MTC-08-NT buffer (BFM) channel operation monitoring Contents...
  • Page 8 Contents Remarks CH1/CH5 CH2/CH6 CH3/CH7 CH4/CH8 0:normal Set value range error Other values: #736 address*6 setting the wrong BFM address Cold junction #737 Default value：0 temperature*7 #738/#742 #739/#743 #740/#744 #741/#745 Work status word * 8 Default value：0 * 1. #701 ~ #708:The measured value of channel 1~l 8. The unit is determined according to the input type (#901 ~ #908).
  • Page 9 Control completion status Incomplete control in a stable state b8～b15 Save － － 1.5.2 Channel characteristics set MTC-08-NT buffer (BFM) channel characteristics set as table1-8 Table 1-8 MTC-08-NT buffer (BFM) channel characteristics set Content Remarks CH1/CH5 CH2/CH6 CH3/CH7 CH4/CH8 Restore factory #200 Default value：0...
  • Page 10 MTC-08-NT buffer (BFM) set the control function of the content to table1-9. Table 1-9 MTC-08-NT buffer (BFM) the control function of the set Content Remarks CH1/CH5 CH2/CH6 CH3/CH7 CH4/CH8 #901/#905 #902/#906 #903/#907 #904/#908 Input type *1 Default value：0 Default value：0.0 #909/#913 #910/#914 #911/#915 #912/#916 Set value (SV) * 2 Unit：0.1℃/℉...
  • Page 11 Content Remarks CH1/CH5 CH2/CH6 CH3/CH7 CH4/CH8 Default value：0 0:Not self-tuning or aut Auto-tuning setting M8/M12 M9/M13 M10/M14 M11/M15 o-tuning has been of CH1- CH8 *7 completed 1：Auto-Tune Default value：2 #1000/#10 #1001/#10 #1002/#10 #1003/#10 Control mode 0：Hand 1：ON/OFF setting 3:PID Default value：1 0:Cooling 1:Heating 2:Heating and cooling...
  • Page 12 Content Remarks CH1/CH5 CH2/CH6 CH3/CH7 CH4/CH8 Selection of Default value：0 #1165/#11 #1166/#11 #1168/#11 temperature control #11671171 0:Slow heating object object 1:Slow heating object characteristics * 11 Default value：1 #1173/#11 #1174/#11 #1175/#11 #1176/#11 PID algorithm 0:Fuzzy PID algorithm selection 1:Intelligent PID algorithm Default value：0.0% #1181/#11...
  • Page 13 value Significance (decimal) Pt100，input range：－150.0～600.0℃ Pt100，input range：－238.0～300.0℉ Pt100，input range：－238.0～1112.0℉ JPt100，input range：－50.0～150.0℃ JPt100，input range：－150.0～500.0℃ JPt100，input range：－238.0～300.0℉ JPt100，input range：－238.0～932.0℉ Cu100，input range：－30.0～120.0℃ Cu100，input range：－22.0～248.0℉ Cu50，input range：－30.0～120.0℃ Cu50，input range：－22.0～248.0℉ Ni120，input range：－80.0℃～280.0℃ Ni120，input range：－112.0℉～536.0℉ PT100，input range：：-150.0～300.0℃ B-type thermocouple, input range: 400.0 ~ 1800.0℃ B-type thermocouple, input range: 752.0～3272.0℉ K-type thermocouple, -100.0～600.0℃...
  • Page 14 MV value will switch smoothly to the next output state. 1.5.4 Multi-step function The Multi-step function Settings of MTC-08-NT buffer (BFM) are shown in table 1-11 Table 1-11 Multi-step function Settings for the buffer (BFM) of MTC-08-NT Content...
  • Page 15 time 0 ~ 900(minutes) Default value :0, Step 4 time * 2 time 0 ~ #411/#487 #430/#506 #449/#525 #468/#544 900(minutes) Default value :0, Step 5 time * 2 time 0 ~ #412/#488 #431/#507 #450/#526 #469/#545 900(minutes) Default value :0, #413/#489 #432/#508 #451/#527 #470/#546...

  • Page 16: Alarm Function Setting

    * 1. #600 ~ #603: alarm enable, from which the user can determine the type of alarm required to enable. #600 set the alarm type 1, #601 set the alarm type 2, and so on. MTC-08-NT offers 14 alarm types, four of which can be selected simultaneously (see 5.3.1 alarm type).

  • Page 17: Attachment List

    1.6 Attachment List The terminal blocks supplied with the MTC-08-NT terminals are shipped with the terminal. The details are shown in the table below. Table 1-15 List of accessories...

  • Page 18: Installation Wiring

    2.1.1 Installation location requirements As shown in figure 2-1, MTC-08-NT shall be installed horizontally on the back panel of the electric cabinet, installed up and down and maintaining the air space above and below it. Other direction installation is not conducive to their own heat dissipation, for the improper installation.

  • Page 19: Wiring Precautions

    2. Pull out the DIN slot clasp at the bottom of the module; 3. Attach the module to DIN; 4. Press the buckle back to the original position and lock the module; 5. Finally, the two ends of the module are fixed with DIN slots to avoid sliding left and right. Fixed with screw installation For occasions where there may be a large impact, screw hole installation can be adopted, as shown in figure 2-3.

  • Page 20: Wiring Instructions

    2.2.3 Cable specifications When wiring for MTC-08-NT applications, it is recommended to use multi-ply copper conductors and prefabricate insulated terminals to ensure the wiring quality. The cross-sectional area and model of the recommended conductor are shown in table 2-1.
  • Page 21 Wire cross-section Matching terminal heat Cable name Type requirements shrinkable tube 24VDC power H1.5/14 pre-insulated tubular 1.0～2.0mm² AWG12，AWG18 cable terminal, or wire soldering H2.0/14 pre-insulated tubular Ground wire 2.0mm² AWG12 terminal, or wire soldering Communication H1.5/14 pre-insulated tubular 1.0～2.0mm² AWG12，AWG18 cable terminal, or wire soldering Input/output...

  • Page 22: Communication And Networking

    The connection methods of communication lines are different in different system networking modes. 1.The temperature controller is connected to the main PLC module of MEGMEET. The user needs to use twisted pair to connect the RS485 communication terminal of MTC and the RS485 communication terminal of the main module (see the user manual of the relevant main module).
  • Page 23 BFM address is 100, and the logical address of Modicon data is 4:101. 3.2 MCbus communication protocol MCbus communication protocol is a small PLC network protocol developed by MEGMEET. MTC USES MCbus communication protocol when matching with MEGMEET series PLC modules.
  • Page 24 1. Connect the RS485 communication terminal of MTC and the RS485 communication terminal of the main module with the twisted pair wire provided by the user (see 2.2.6 connection communication line for details). 2. Use the programming cable of the main module to connect the PC to the main module. 3.
  • Page 25 Figure 3-3 parameter setting of communication port 3. Click the corresponding MCbus setting button to enter the MCbus protocol setting interface. As shown in the following figure. Figure 3-4 MCbus protocol (1) select the baud rate and parity supported by MTC. Baud rate range supported by MTC: 2400, 4800, 9600, 19200.
  • Page 26 Note: 1. After the user completes the configuration of MTC and runs the MTC on power by using the MTC wizard Settings, the user can use the man-machine interface of any PLC that supports MEGMEET to configure and monitor the parameters of MTC. Please refer to the relevant manual of man-machine interface for details.
  • Page 27 This section through the "man-machine interface +PLC+MTC" this application system to explain the general use of MTC thermostat. Taking MEGMEET series PLC as an example, ModBus is used for communication between man-machine interface and PLC, and McBus is used for communication between PLC and MTC.
  • Page 28 D7543 CH3 heat control output value D7559 Error status word D7544 CH4 heat control output value D7560 Set value range wrong address D7545 D7561 Cold junction temperature D7546 D7562 D7547 D7563 Read common5 1. The main module defines the frame with the MCbus communication buffer. D component definition is shown in the table below Table 3-5 Settings indicate special meaning of communication D element D7500...
  • Page 29 Table 3-7 D component definitions for write command 6 D elements Explanation D elements Explanation D7500 D7516 D7501 D7517 D7502 CH1 channel type D7518 CH1 control output cycle setting D7503 CH2 channel type D7519 CH2 control output cycle setting D7504 CH3 channel type D7520 CH3 control output cycle...
  • Page 30 D7544 CH4 temperature setting D7560 D7545 D7561 D7546 D7562 D7547 D7563 Write command 7 1. The main module defines the frame with the MCbus communication buffer. See tables 3-6 and 3-7 for the definition of D components and write command 7. Table 3-9 Settings represent communication special meaning D element D7500 D7501...
  • Page 31 band time D7534 CH2 heat side proportional D7550 CH2 heat side derivative band time D7535 CH3 heat side proportional D7551 CH3 heat side derivative band time D7536 CH4 heat side proportional D7552 CH4 heat side derivative band time D7537 D7553 D7538 D7554 D7539...
  • Page 32 D7508 D7524 D7509 D7525 D7510 CH1 cool side integral time D7526 D7511 CH2 cool side integral time D7527 D7512 CH3 cool side integral time D7528 D7513 CH4 cool side integral time D7529 D7514 D7530 D7515 D7531 2.MTC thermostat return the frame with the MCbus communication buffer. Take MTC#1 region as an example: when D7532 and D7563 change to 8, the write is successful and up to 30 D elements can be written at a time.
  • Page 33 Writer command 6 M component routine, this routine is through the operation of M components to achieve the self-tuning function, this routine takes the channel 1 of MTC#1 as an example, of course, some parameters such as self-tuning deviation setting need to be set through the MTC wizard in advance, here only to achieve a self-tuning start and finish Example: Finally, if there is no man-machine interface in the system, only PLC, the above routine only needs to set...
  • Page 34 M0, M1, M2 through the man-machine interface through the PLC itself can be set. 4.MTC wizard settings The MTC wizard setting is a sub-function module of MEGMEET programming software X_Builder, which is started by X_Builder. Its main function is to configure MTC parameters after MTC network with MCbus protocol, monitor MTC status and data at the same time.
  • Page 35 the interface. (2) in the pop-up shortcut menu, select the modification information and enter the following interface. Figure 4-2 modify module parameters 2. When the system is configured with multiple MTC thermostats. At this point, the user needs to configure the module type and station number. The specific operation steps are as follows.

  • Page 36: Save Parameters

    The parameters that users can configure through the MTC wizard are divided into five categories: control function, channel feature, Multi-step feature, I/O port feature, alarm function, and save setting (see 1.5 buffer (BFM) for related parameter description), as shown in figure 9-4. Users can directly select the relevant parameters to modify.
  • Page 37 Figure 4-5 save the Settings page 2) click the restore BFM factory Settings button. The system initializes the thermostat and uploads all parameters. 4.2.4 download and upload After the completion of parameter configuration, the user can right-click the site N under the configuration of the tree structure module, and select the download menu from the pop-up right-click menu Item to download the configuration parameters to the MTC of the corresponding site.

  • Page 38: Feature Settings

    display methods: charts and curves. As shown in the following figure. Figure 4-6 Monitor information The chart monitoring page shows the real-time state parameters of the current MTC and the error state information (the explanation of the error state word is shown in table 1-5), while the curve monitoring page mainly shows the set values and measured values of each MTC channel.
  • Page 39 Figure 5-1 MTC channel model and feature settings The purpose of setting the channel characteristics is to adjust the field linearity error of the module, the difference in the ambient temperature of the module and the use of the compensation cable (connecting cable) will bring errors to the MTC measurement results, and the user can eliminate it by setting the channel characteristics error.

  • Page 40: Control Function

    Figure 5-3 example of feature change (with pattern 3 example) 5.2 control function 5.2.1 manual control When the control mode setting unit BFM#1000 ~ BFM#1003 is set to 0, the corresponding channel of MTC will perform manual control. The output will be output according to the manual output set value (BFM#1016 ~ BFM#1019) according to the control cycle (BFM#917 ~ BFM#920).

  • Page 41: Alarm Function

    unit (BFM#999). This operation needs to be triggered along the way, and cannot continue to write 1 to the corresponding position of BFM#999, otherwise it will cause continuous self-tuning. And when the control starts (write 1 in the control start/stop setting unit), the corresponding channel of MTC will start the PID parameter self-tuning.
  • Page 42 value-set value) is smaller than the alarm setting Alarm when the absolute value of Deviation deviation (| measured value - setting ± input width high/low value |) is larger than the alarm setting value Alarm when the absolute value of deviation (| measured value - setting Band ±...
  • Page 43 changes Note： 1． Input scope： The value between the lower input value and the upper input value. For example, if the upper and lower limits are 100 and 1000 respectively, the range is 101～999. 2.Input width： Width from the lower limit to the upper limit of the input value (upper limit-lower limit). For example, if the upper limit is 100 and lower limits is 1000, then "+ input width"...
  • Page 44 Figure 5-9 Schematic diagram of the （The deviation is negative） deviation high 4．Deviation low Alarm when the deviation value (= PV - SV) is smaller than the alarm setting value Figure 5-10 Schematic diagram of the deviation low（The deviation is positive） Figure 5-11 Schematic diagram of the deviation low（The deviation is negative）...
  • Page 45 6． Band Alarm when the absolute value of deviation (= | PV - SV |) is smaller than the alarm setting value Figure 5-13 Schematic diagram of the band Alarm, Waiting for the alarm and Wait for the second alarm 1．...
  • Page 46 alarm triggered by the measured value when the set value is changed (waiting), until the measured value next triggers the alarm, as shown in figure 5-16. diagram Figure 5-16 Schematic of the wait again the alarm 5.3.2 Alarm dead zone In order to avoid repeated occurrence of the alarm state and non-alarm state when the measured value fluctuates around the alarm setting value, the alarm dead zone (BFM # 604) can be set.
  • Page 47 Figure 5-19 Schematic diagram of deviation high/low 5.3.3 Alarm delay When the deviation between the measured value PV and the set value SV reaches the alarm setting value, the alarm delay function will remain in the non-alarm state. No alarm will be given until the number of input samples exceeds the number of alarm delay.
  • Page 48 5.5 PID control function of heat and cool MTC-08-NT when the input type of channel 2 and channel 4 is selected as 0, the temperature control output OUT2 and OUT4 will be automatically assigned to the refrigeration control output of channel 1 and channel 3.

  • Page 49: Application Examples

    6. Application examples The MTC wizard Settings can help users set some parameters. However, the function that needs to make logical judgment needs to be realized through programming on the basis of completing the corresponding parameter setting. This chapter introduces the MTC parameter configuration through the MTC wizard setting and programming method respectively.
  • Page 50 Figure 6-2 Modify module parameters 4． Select the control function and select "3", "9", "27" and "37" in the input type selection, as shown in the following figure. Figure 6-3 Input type selection 5． Select the channel characteristics and input the following contents in D0 and D1 respectively. Note that the unit is 0.1℃/℉.
  • Page 51 Figure 6-4 Input D0,D1 6.Right-click the site 2 option under the module configuration in the left tree structure, and select download from the right-click menu that pops up. Figure 6-5 Download 7.The feature change is completed when the download site 2 configuration is completed in the lower left corner of the interface.
  • Page 52 1. Refer to the 6.1 feature to change the first three steps for setting. 2. Select the control function and set it according to the figure below. Figure 6-7 setting control function 3.Select the alarm function and set it as shown in the figure below. Figure 6-8 setting alarm function 4.Right-click the site 2 option under the module configuration in the left tree structure, and select...
  • Page 53 download from the right-click menu to complete the setup. 6.3 the setting Example: MTC station number is 2. Set the first channel to use mode 3, work in the heat mode, the given value is 100.0℃, the control cycle is 3 seconds, use the self-tuning mode, the self-tuning deviation is set to -20℃.
  • Page 54 set values and time of 1 ~ 4 segments of multiple segments. Table 6-1 set values and time number of segments Setting 100.0 150.0 200.0 250.0 200.0 150.0 100.0 100.0 value(℃) Time（s） The beginning section of repetition is 3, the end section of repetition is 6, and the number of repeats is 3. 1.

  • Page 55: Operation Check

    3. Right click the option of site 2 under the module configuration in the left tree structure, and select download to complete the setup from the right click menu. 7.Operation check This chapter introduces the routine and fault checking methods of MTCW. 7.1 Routine check 1.
  • Page 56 tuning start 7th channel auto M1406 M1414 M1422 M1430 M1438 M1446 M1454 tuning start 8th channel auto M1407 M1415 M1423 M1431 M1439 M1447 M1455 tuning start M1456~M1462 Meaningless Alarm 1 status of M1464 M1528 M1592 M1656 M1720 M1784 M1848 channel 1 Alarm 2 status of M1465 M1529...
  • Page 57 Alarm 3 status of M1482 M1546 M1610 M1674 M17387 M1802 M1866 channel 3 Alarm 4 status of M1483 M1547 M1611 M1675 M1739 M1803 M1867 channel 3 Initialization M1484 M1548 M1612 M1676 M1740 M1804 M1868 complete flag of channel 3 Auto-tuning state of M1485 M1549 M1613...
  • Page 58 M1509 M1573 M1637 M1701 M1765 M1829 M1893 M1510 M1574 M1638 M1702 M1766 M1830 M1894 M1511 M1575 M1639 M1703 M1767 M1831 M1895 M1512 M1576 M1640 M1704 M1768 M1832 M1896 M1513 M1577 M1641 M1705 M1769 M1833 M1897 M1514 M1578 M1642 M1706 M1770 M1834 M1898 M1515...

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