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Longo Modbus Products LMP-1.MP2

4 OPERATION

Basic settings can be entered with panel Touch Buttons (TB).
Modes of operation and parameters can be set from any Modbus RTU Master.

It is advised to press touch-buttons respectively with finger not faster than 1 press per second.

Press should be done with whole finger tip. Brief pressing could not activate the action, because of 
protection against the noise and other influence. 

4.1 Operational modes

LCD Display “stand-by mode”

The display is normally in this mode, if no TB is pressed in last ~5 seconds. 

LED intensity is in correlation with Light intensity measurement (more light - brighter, less light - 
darker).

Actual room temperature (0.5 °C resolution) is shown on the screen if enabled.

LCD Display “SET mode”

First press on any TB will activate the display to “set mode” and LCD intensity will be put to 
maximum. No action regarding the pressed TB is done. Further pressings on any TB will make the 
change (bar-graphs) regarding the pressed TB. 

Actual temperature set-point (regarding the right bar-graph) is shown on the screen if enabled.

Display will return to “stand-by mode” if touch buttons are not pressed for a while (~5 seconds). 

Changing operation modes

Request for switching between CP 

normal

 and 

economic

 operating mode  is done with lower left and

right TB pressed simultaneously : switch to 

economic

 mode

Request for switching between CP 

on

 and 

off

 operating mode  is done with upper

 

left and right TB 

pressed simultaneously : CP switched 

off

 

Confirmation of above requested modes is done by Modbus RTU Master equipment by changing the 
appropriate command bit (normal/economic, system on/off).  

Normal

This is default mode for MP2 module. The control algorithm is executing regarding the parameters.

Economy

If set, controller will start cooling when room temperature will raise above max. temperature set- 
point (SP) and stop when temperature will drop 1 °C below max. temp. SP. On the other hand, when
room temperature fall's below min. temp. SP controller will start heating and stop when 
temperature will raise 1 °C above min. temp. SP.
In economic mode “ECO” sign appear on LCD.

Off

In this mode panel sends command to switch off all devices: hot valve and cold valve. Temperature 
LCD bar becomes white and “OFF” sign appear on LCD.
CP can be turned off using 

System On/Off

 command. In this case cool, heat commands are switched 

off. Cool and heat commands are also switched off when temperature measured by the panel is 
inside temperature dead band values (default dead band is 0.5 °C).

    

   

3

Summary of Contents for LMP-1.MP2

Page 1: ...USER MANUAL Longo Modbus Products LMP 1 MP2 Modbus RTU Temperature Control panel Version 1 SMARTEH d o o Poljubinj 114 5220 Tolmin Slovenia Tel 386 0 5 388 44 00 e mail info smarteh si www smarteh si...

Page 2: ...Longo Modbus Products LMP 1 MP2 Written by SMARTEH d o o Copyright 2011 SMARTEH d o o User Manual Document Version 001 October 2011 i...

Page 3: ...can be arranged with our authorized representative Warranty does not include damage due to transport or because of unconsidered corresponding regulations of the country where the module is installed...

Page 4: ...Operational modes 3 4 2 Functions 4 4 3 Parameters 5 4 4 Modbus RTU variables memory 7 4 5 Modbus RTU settings memory 9 5 INSTALLATION 10 5 1 Connection scheme 10 5 2 Mounting frame selection 12 5 3 M...

Page 5: ...Longo Modbus Products LMP 1 MP2 1 ABBREVIATIONS Sorted by order of appearance in document SP Set point CP Control Panel TB Touch Button LCD Liquid crystal display 1...

Page 6: ...tual temperature is in SP Dead band range LCD SP bar is white TB on the left side has the same function as on the right warmer cooler TB With ECO economy OFF and ERR error signs on LCD CP status is re...

Page 7: ...position LCD bar graph for temperature set point Light intensity measurement LCD intensity control Economic function 2 4 pipe heating cooling system supported Balcony door window function Frost prote...

Page 8: ...hile 5 seconds Changing operation modes Request for switching between CP normal and economic operating mode is done with lower left and right TB pressed simultaneously switch to economic mode Request...

Page 9: ...cond by 1 On the other hand if the difference is 1 C the PI output value will decrease every second by 1 2 4 pipe system selection While 4 pipe factory default system active controller will activate h...

Page 10: ...ed only for two pipe system to change calculation for Hot valve Winter heating 0 to Summer cooling 1 4 2 pipe Four pipe system manages hot and cold water pipes simultaneously Two pipe system manages o...

Page 11: ...nto PI calculation algorithm as SP SP up When this command changes to active CP will increment SP for 1 10 of scale It acts like pressing on Warmer TB on CP SP down When this command changes to active...

Page 12: ...ble 00011 Not used 00012 Not used 00013 Balcony door status 0 1 Open Closed 00014 Window switch status 0 1 Open Closed 00015 Enable Balcony Door cmd 0 1 Disable Enable 00016 Enable Window command 0 1...

Page 13: ...1 Not used 10012 Not used 10013 Not used 10014 PushButton Pressed Status 0 1 Off On 10015 Enable Balcony Door sts 0 1 Disable Enable 10016 Enable Window status 0 1 Disable Enable Table 5 Input Registe...

Page 14: ...ouch button On sensitivity limit 1 20 High sens Low sens 40098 Modbus RTU slave address 1 255 Default address is 1 40099 Modbus RTU Baud rate NOTE polling cycle faster than 500 msec can cause occasion...

Page 15: ...Longo Modbus Products LMP 1 MP2 5 INSTALLATION 5 1 Connection scheme Figure 2 Connection scheme 10...

Page 16: ...tive to range Min temp bottom LCD bar and Max temp top LCD bar TB1 TB3 Up left Up right Temp SP Up Increase by one step step Max temp Min temp 1 10 TB2 TB4 Down left Down right Temp SP Down Decrease b...

Page 17: ...mes of other vendors most probably suits as well but they were not verified by Smarteh Before installation verify compatibility of non listed frames Module housing has a fin on each side which can be...

Page 18: ...height is 1 5 m above floor level 1 Set the correct LMP 1 MP2 settings refer to Table 6 and Table 9 2 Connect LMP 1 MP2 with appropriate cable to the connector K1 Modbus RTU Master equipment and power...

Page 19: ...ing module 01 derivation code 001 version code reserved for future HW and or SW firmware upgrades D C 40 11 is the date code 40 week and 11 year of production Label 2 description S N MP2 S9 1100000003...

Page 20: ...Longo Modbus Products LMP 1 MP2 6 REGULATION DIAGRAM 15...

Page 21: ...external source Interconnection connector type RJ 12 6 6 Power consumption 1 W Dimensions W x H x D 75 x 49 x 29 mm Weight 50 g Maximum altitude 2000 m Mounting position horizontal Ambient temperatur...

Page 22: ...Longo Modbus Products LMP 1 MP2 8 CHANGES The following table describes all the changes to the document Date V Description 12 10 11 001 The initial version issued as LMP 1 MP2 module UserManual 17...

Page 23: ...Longo Modbus Products LMP 1 MP2 9 NOTES 18...

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