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Seneca R-KEY-LT User Manual

1-port modbus rtu/ascii gateway
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USER MANUAL
R-KEY-LT
1-PORT MODBUS RTU/ASCII GATEWAY
SENECA S.r.l.
Via Austria 26 – 35127 – Z.I. - PADOVA (PD) - ITALY
Tel. +39.049.8705355 – 8705355 Fax +39 049.8706287
www.seneca.it
ORIGINAL INSTRUCTIONS

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  • Page 1 USER MANUAL R-KEY-LT 1-PORT MODBUS RTU/ASCII GATEWAY SENECA S.r.l. Via Austria 26 – 35127 – Z.I. - PADOVA (PD) - ITALY Tel. +39.049.8705355 – 8705355 Fax +39 049.8706287 www.seneca.it ORIGINAL INSTRUCTIONS...
  • Page 2 Set up shall be performed only after a correct installation and the user shall perform every operation described in the installation manual carefully. Seneca is not considered liable for failure, breakdown, accident caused because of ignorance or failure to apply the indicated requirements.

  • Page 3: Table Of Contents

    FIRST ACCESS TO THE WEB SERVER WITH A DHCP SERVER ..................11 5.1. FIRST ACCESS TO THE WEB SERVER WITHOUT A DHCP SERVER ................13 5.2. TIPS FOR CONFIGURING IP FOR MULTIPLE R-KEY-LT DEVICES ..................15 5.3. DIP SWITCHES SW1 AND SW2 CONFIGURATION ......................16 5.4.

  • Page 4: Device Description And Intended Use

    Use the installation manual for more info. WARNING! Under any circumstances, SENECA s.r.l. or its suppliers shall not be responsible for loss of recording data/incomes or for consequential or incidental damage due to neglect or reckless mishandling of the device, even though SENECA is well aware of these possible damages.

  • Page 5: Technical Specifications

    User Manual R-KEY-LT TECHNICAL SPECIFICATIONS 1.2. GENERAL SPECIFICATIONS Power supply 10 40 Vdc; 19 28 Vac 50 60 Hz Absorption max Dimensions 110 x 53 x 32 mm Box, protection degree Black, PA6, IP20 RS485/RS232 COMMUNICATION PORT Number Protocols Modbus RTU/ASCII Slave/Master RS232/RS485 Baud 1200..115200 configurable...

  • Page 6: Description

    MODBUS ETHERNET TO SERIAL 1.4. In this scenario a Modbus TCP-IP master is connected with ethernet to R-KEY-LT, one or more serial Modbus slaves (for example the Z-PC Seneca Series) are connected to the serial port. A typical LAN connection is represented into this figure: Also a communication with multiple clients is possible (Max 8 clients for device): www.seneca.it...

  • Page 7: How It Works

    Only the serial configuration must be made (baud rate, parity etc…). The Master (client) Modbus TCP-IP request a modbus register by ethernet, then the R-KEY-LT convert the request to the serial Modbus slave, the serial Modbus slave response is also retranslated in Modbus TCP to the Master.

  • Page 8: Modbus Serial To Ethernet

    In this scenario a Modbus serial master must be connect to one or multiple Modbus TCP-IP servers. The Modbus serial master is connected with the serial port to the R-KEY-LT, one or more Modbus TCP-IP servers are connected to the ethernet port: HOW IT WORKS 1.5.1.

  • Page 9: Electrical Connections

    User Manual R-KEY-LT WARNING! It’s not possible to connect more than one Modbus server using the same station address ELECTRICAL CONNECTIONS For more info please refer to the Installation manual, downloadable from: http://www.seneca.it/products/r-key-lite POWER SUPPLY 2.1. Connect the power supply to the electric clamp near the ethernet port: SERIAL RS485 / RS232 TERMINAL POSITIONS 2.2.

  • Page 10: Debug Leds

    R-KEY-LT DEBUG LEDS STATE MEANING R-KEY-LT is switched off FLASHING R-KEY-LT is waiting an ip address from the DHCP server R-KEY-LT has acquired an IP address FLASHING Data reception on serial port FLASHING Data transmission on serial port DEFAULT CONFIGURATION...

  • Page 11: Configuring The Device

    5) Download from here: http://www.seneca.it/products/r-key-lt the Seneca Discovery Device tools then install it. 6) Launch the Seneca Discovery Device tool and click on the “Search” button, a list of Seneca devices will be found. Now select the R-KEY-LT device: www.seneca.it ALL RIGHTS RESERVED.
  • Page 12 User Manual R-KEY-LT 7) If you need to force a static IP compatible with your PC select the R-KEY-LT device and click on the “ASSIGN” button 8) Now the device can be configured from the internal web server by typing in a browser the device ip address, for example: http://192.168.1.168...

  • Page 13: First Access To The Web Server Without A Dhcp Server

    User Manual R-KEY-LT WARNING! If R-KEY-LT is configured with the ip set to DHCP but the DHCP server is not active, after 5 minutes from the power up the R-KEY-LT will force the following fault ip address: 169.254.x.y Where x.y are the last 2 MAC address values.
  • Page 14 User Manual R-KEY-LT 7) Force a static IP compatible with your PC: select the R-KEY-LT device with ip 192.168.90.101 and click on the “ASSIGN” button 8) Now the device can be configured from the internal web server by typing in a browser the device ip address, for example: http://192.168.1.168...

  • Page 15: Tips For Configuring Ip For Multiple R-Key-Lt Devices

    TIPS FOR CONFIGURING IP FOR MULTIPLE R-KEY-LT DEVICES 5.3. If in a network there are multiple R-KEY-LT devices to be installed, for speed up the installation follow this tips:  Install all the R-KEY-LT with the SW2 DIP1 = OFF and SW2 DIP2=OFF. If the devices are not used before the ip is set to DHCP, if not force the device to DHCP with the dip switch.

  • Page 16: Dip Switches Sw1 And Sw2 Configuration

    RESERVED WEB SERVER CONFIGURATION 5.5. For access to the internal webserver type in a browser the R-KEY-LT ip address, for example: http://192.168.90.101 then enter the username and password (default: user name = admin, password = admin). The first page is the “Status” page: www.seneca.it...
  • Page 17 The R-KEY IP address can be obtained with the Device Discovery utility. WARNING! If R-KEY-LT is configured with the ip set to DHCP but the DHCP server is not active, after 5 minutes from the power up the R-KEY-LT will force the following fault ip address: 169.254.x.y...
  • Page 18 User Manual R-KEY-LT STATIC GATEWAY Gateway address when DHCP is Disable When a configuration it’s made you must confirm with “APPLY”, then the new configuration became operative. WORKING MODE Select between Modbus Serial to Ethernet or Modbus Ethernet to Serial.
  • Page 19 IP CHANGE FROM DISCOVERY Used to Set if a user is allowed to change IP configuration from the software “Seneca Discovery Device” If “Modbus Serial to Ethernet” mode is selected you need to compile also the Modbus TCP-IP servers parameters: www.seneca.it...
  • Page 20 User Manual R-KEY-LT www.seneca.it ALL RIGHTS RESERVED. NO PART OF THIS PUBLICATION MAY Doc. MI004870-EN Rev. 1.0.0.0 Page 20 BE REPRODUCED WITHOUT PRIOR PERMISSION.
  • Page 21 SERVER#3 START SLAVE ADDRESS = 10 SERVER#3 LAST SLAVE ADDRESS = 10 If the serial master makes a request to the slave address 1 the R-KEY-LT will request the registers from the Modbus TCP-IP server #1. If the serial master makes a request to the slave address 2 the R-KEY-LT will request the registers from the Modbus TCP-IP server #2.

  • Page 22: Save Or Load A Configuration

    Modbus TCP-IP server #3. If the serial master makes a request to the slave address >= 11 the R-KEY-LT will not convert the serial to Ethernet packets (so modbus registers from slaves 11,12 etc.. can be directly requested from the RS485 master).

  • Page 23: Traffic Monitor

    User Manual R-KEY-LT TRAFFIC MONITOR The Traffic Monitor page shows the packets that R-KEY-LT is receiving and transmitting for line debug purpose: The first column is the delay in milliseconds from the last packet, the second column is the packet verse (received from R-KEY-LT or transmitted from the R-KEY-LT), the last column is the packet content in hexadecimal format.
  • Page 24 User Manual R-KEY-LT www.seneca.it ALL RIGHTS RESERVED. NO PART OF THIS PUBLICATION MAY Doc. MI004870-EN Rev. 1.0.0.0 Page 24 BE REPRODUCED WITHOUT PRIOR PERMISSION.

  • Page 25: Firmware Update

    User Manual R-KEY-LT FIRMWARE UPDATE New firmwares can enhance or fix features for the R-KEY-LT device, when available they can be downloaded from: http://www.seneca.it/products/r-key-lite Use the Firmware Update page for update the device. WARNING! Don’t power down or reset the R-KEY-LT until the updating process is completed.

  • Page 26: Extend Rs485 Over Ethernet: Modbus Serial To Ethernet And Then Ethernet To Serial

    For example we need to extend the RS485 using the ethernet or Wifi infrastructure, for obtain this feature you need at least two R-KEY-LT devices: one configured in Serial to Ethernet mode and the other configured in Ethernet to Serial mode: Up to 10 R-KEY-LT devices can be used in ethernet to serial mode (10 Modbus TCP-IP server).

  • Page 27: Glossary

    User Manual R-KEY-LT GLOSSARY MODBUS RTU  An open protocol for the serial communications developed by Modicon Inc. (AEG Schneider Automation International S.A.S.). Simple and robust, it has since become a de facto standard communication protocol. For more info http://www.modbus.org/specs.php MODBUS TCP-IP ...

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