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Mect MPNC006 Series User Manual

Modbus rtu interface
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User Manual
MPNC006 series
Modbus RTU interface
MANUALE D'USO
ME7084_05
07/21

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Summary of Contents for Mect MPNC006 Series

  • Page 1 User Manual MPNC006 series Modbus RTU interface MANUALE D’USO ME7084_05 07/21...
  • Page 2 RTU Modbus interface : MPNC006 Mect srl ME7084_05 07/21...
  • Page 3 RTU Modbus interface : MPNC006 Mect srl INDEX INDEX ........................... 1 Introduction ......................3 1.1 Staff qualification ..................... 3 1.2 Symbols......................3 1.3 Nomenclature ....................3 1.4 Security ......................4 Hardware Installation .................... 4 2.1 System description .................... 4 2.2 Features ......................5 2.3 Installation ......................
  • Page 4 RTU Modbus interface : MPNC006 Mect srl 3.6 ModBus Connection ..................18 3.7 Installation example TPAC1007 / TP1043 ............. 19 3.8 Installation example TPAC1008 / TP1070 ............. 20 3.9 Terminating resistence ..................20 3.10 Watchdog ..................... 21 RTU ModBus registers map ................21 Status led ......................
  • Page 5 PLCs, or technician specialized in the use of electrical device for automation. MECT S.r.l. declines any responsibility for malfunctions or damages caused by improper use of MECT devices, due to the non-compliance with information in this manual. In MECT S.r.l there is an help desk service. 1.2 Symbols Danger Follow these advices to avoid people injury.
  • Page 6 RTU Modbus interface : MPNC006 Mect srl 1.4 Security Attention Switch off devices before connecting them . Attention MPNC006 must be mounted inside cabinet or electrical switchboards whose access must be performed by qualified personnel. ESD (Electrostatic discharge) Modules have electronic components that can be damaged by electrostatic discharge.
  • Page 7 RTU Modbus interface : MPNC006 Mect srl 2.2 Features Table 1 Mechanics Materials Polycarbonate, Polyamide 6.6 Power supply 24Vdc +/-15% 3W Dimensions W x H x L 22.5 mm x 108 mm x 115 mm Installation DIN 35 Environmental conditions Operative temperature 0 °C ...
  • Page 8 RTU Modbus interface : MPNC006 Mect srl Electromagnetic Compatibility The electromagnetic compatibility tests have been carried out at accredited laboratories, according to EN 61326-1, EN 61131-2 and EN 61000-6-2standards. Attention Install the devices in electrical switchboards where temperature doesn’t exceed 55 °C.
  • Page 9 RTU Modbus interface : MPNC006 Mect srl 2.3 Installation 2.3.1 Distances The system must be installed in a way that there is enough space for heat dissipation and cabling. Avoid cables superimposition to prevent EMC problems. Figure 2 2.3.2 Insertion and removal of components...
  • Page 10 RTU Modbus interface : MPNC006 Mect srl The instruments must be assembled on the TBUS with the sequence shown in the figure. Figure 4: Assembly 2.3.4 Proprieties of DIN rail and TBUS All the modules must be hooked directly onto DIN rail of type EN 50022 (DIN 35)
  • Page 11 RTU Modbus interface : MPNC006 Mect srl 3 MPNC006 Wiring 3.1 Power supply 3.1.1 Isolation There are no galvanic isolation zones. Figure 6: logical wiring scheme As you notice from the figure, on the MPNC006 there are no zones that create an isolation between the main power supply and the internal bus (TBUS).
  • Page 12 RTU Modbus interface : MPNC006 Mect srl 3.1.3 Digital outputs power supply The digital outputs of the MPNC006 can provide up to 2A maximum current at 24V. The maximum allowable current per single output is 500mA. The current supplied by the outputs is supplied by the power supply of the terminal itself: it is the...
  • Page 13 RTU Modbus interface : MPNC006 Mect srl 3.2 The daisy chain The communication between the modules take place through a chain that propagates from the MPNC006 till the last terminal. Make the connection as shown in the figure. Figure 9: Daisy chain wiring 3.3 I/O Connection...
  • Page 14 RTU Modbus interface : MPNC006 Mect srl 3.3.1 Analog input connection The following figure shows the connections required to use the temperature sensors and analog inputs to the MPNC006. Figure 11: Analog inputs 3.3.2 Digital inputs Connection If configured as inputs, the digital lines are PNP type.
  • Page 15 RTU Modbus interface : MPNC006 Mect srl 3.3.3 Digital outputs connection If configured as outputs, the digital lines are PNP type. Figure 13: Digital outputs ATTENTION: bring the 24VDC to terminal 2 of the black terminal block. 3.4 Max Configuration...
  • Page 16 RTU Modbus interface : MPNC006 Mect srl 3.5 Modbus parameters configuration The 8-position dip-switch is used to change the baud rate, the address on the MPNC006 and the stop and parity bit. Figure 14: Modbus parameters configuration 3.5.1 Address (ID module) The address is set using switches 3 to 8, so the valid addresses are 1 to 63.
  • Page 17 RTU Modbus interface : MPNC006 Mect srl Figure 15: Node address settings (ID) Turn the device off and on again to make the changes effective. 3.5.2 Baud Rate settings On the MPNC006 you can set 4 different baud rates. The baud rate is set via the DIP switches 1 to 2.
  • Page 18 RTU Modbus interface : MPNC006 Mect srl 3.5.3 Parity and stop bit configuration If at the start the address dips (module ID) are all zero, the procedure for reading/setting the configuration of the stop, parity and data bits is accessed.
  • Page 19 RTU Modbus interface : MPNC006 Mect srl The parity programming is done by setting: Dip settings Configuration No parity Even Parity Odd parity To save the configured value, bits S1 and S2 must be set to OFF. Stop bit: S1=1; S2=0 Procedure: - Set all dip switches to 0 except dip 1;...
  • Page 20 RTU Modbus interface : MPNC006 Mect srl 3.5.4 Reset Configuration If at the start all the dips are at 0, it is possible to restore the configuration to the default values, the LEDs LED_On, LED_Run, LED_Ain1 and LED_Ain 2 are flashing until the bits from S3 to S8 are brought to 1.
  • Page 21 RTU Modbus interface : MPNC006 Mect srl 3.7 Installation example TPAC1007 / TP1043 This section describes an example for the commissioning of a system composed of:  MPNC006  MPNC020  MPNC030  Master Modbus (TPAC1007 / TP1043) Figure 18: Modbus connection...
  • Page 22 RTU Modbus interface : MPNC006 Mect srl 3.8 Installation example TPAC1008 / TP1070 This section describes an example for the commissioning of a system composed of :  MPNC006  MPNC020  MPNC030  Master Modbus (TPAC1008 / TP1070) Figure 19: Modbus connection 3.9 Terminating resistence...
  • Page 23 Once the watchdog is triggered on MPNC006, the Run and On LEDs will flash rapidly. 4 RTU ModBus registers map The MPNC006 is a RTU ModBus bridge, which can interface with MECT terminals such as MPNC020 MPNC030, MPNC035. The following table shows the memory map.
  • Page 24 RTU Modbus interface : MPNC006 Mect srl MPNC30 Module 2 Configuration: See MPNC_AnInConf_B module 1 MPNC30 Module 3 Configuration: See MPNC_AnInConf_C module 1 MPNC30 Module 4 Configuration: See MPNC_AnInConf_D module 1 Value of Channel 1 module 1: MPNC_AnIn_A_1 current configuration: values 0..20000(milliampere for 1000)
  • Page 25 RTU Modbus interface : MPNC006 Mect srl Value of Channel 3 module 3 See description module 1 MPNC_AnIn_C_3 Value of Channel 4 module 3 See description module 1 MPNC_AnIn_C_4 Value of Channel 1 module 4 See description module 1 MPNC_AnIn_D_1...
  • Page 26 RTU Modbus interface : MPNC006 Mect srl Reboot If 1 reboot MPNC006 and the terminals chain MPNC_Reboot Connected terminals The number of the terminalis connected to MPNC006 MPNC_ModulesNumber MPNC006 analogue input 1 Configuration MPNC_AnInConf_1 Value of channel 1 module 1 1 = current configuration: values 0..20000(milliampere for 1000)
  • Page 27 RTU Modbus interface : MPNC006 Mect srl OUTPUT ) Module 1 the PLC: channel 1 bit 0..3 Channel 1 = mA channel 2 bit 4..7 Channel 2 = mA channel 3 bit 8..11 Channel 3 = V channel 4 bit 12..15...
  • Page 28 RTU Modbus interface : MPNC006 Mect srl 5 Status led The operative conditions of the MPNC006 are indicated by the LEDs present on the rear part of the device. Colour Signification Green Indicate a command reception from On LED the master...
  • Page 29 RTU Modbus interface : MPNC006 Mect srl 5.4 Digital I/O Led The eight LEDs of the digital I/O indicate if there is a voltage of 24V on the associated line ME7084_05 07/21...