Novus DigiGate Profibus Instruction Manual

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DigiGate Profibus
INSTRUCTIONS MANUAL - V1.0x F
INTRODUCTION
DigiGate Profibus is the ideal equipment for interconnecting a Profibus DP network with a Modbus RTU network. It
Works as a gateway, operating as a master station in the Modbus network and as a slave station in the Profibus network.
Thus, according to its previous configuration, DigiGate will read the data of the other devices (slaves) of the Modbus
network and send the read values to the Profibus master. In the same way, it will write at the output of the Modbus
slaves according to the Profibus master requests, providing a complete control of the Modbus network devices through
the Profibus network.
The data interchange is performed through internal memory tables of the device, which are shared between the Profibus
side and the Modbus side. This data interchange mode is very simple, since the Profibus control system will only need
reading the data from the reading table, which is continuously fed and updated through the reading operation performed
by the Modbus. In the same way, the Profibus will write the data in the writing table so that the Modbus can forward the
new values to the correct registers of the corresponding slaves.
The device is totally configurable through the application DigiConfig for Windows®, which comes with the product,
making access and change of its parameters really easy.
This manual will present the instructions necessary for installation and connection of the module. The installer for the
DigiConfig is available on our website.

SPECIFICATIONS

General:
Operating environment: 0 to 50 °C, 30 to 80 % of relative humidity, without condensation.
Mounting: DIN 35 mm rail.
Electrical insulation between Profibus output and the rest of the device: 1000 Vac.
Power supply: 10 to 35 Vdc / 100 mA maximum. Internal protection against inverse polarity.
Front lit indicators for communication and status.
The CFG key at the front panel will set the device into "Configuration mode" (Modbus slave: address 246, baud
rate 1200, even parity, 1 stop bit), able to be detected and configured through the DigiConfig software.
Configuration software in Windows environment: DigiConfig.
Profibus:
Protocol: Profibus DP.
Operates at the entire range of communication rates, from 9600 bps to 12 Mbps.
Addressing range: 0 to 125.
Automatic detection of supported baud rate.
".GSD" file included.
Termination and polarization resistors included (activated by jumper).
Profibus connection: Terminals for wires, comes with an adapter for DB9.
NOVUS AUTOMATION
1/11

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Summary of Contents for Novus DigiGate Profibus

  • Page 1: Specifications

    INTRODUCTION DigiGate Profibus is the ideal equipment for interconnecting a Profibus DP network with a Modbus RTU network. It Works as a gateway, operating as a master station in the Modbus network and as a slave station in the Profibus network.
  • Page 2 DigiGate Profibus Modbus: ● Operates from 1200 bps to 115200 bps. Termination and polarization resistors included (activated by jumper). ● Protection at the bus: ±60 Vdc, 15 kV ESD. ● Commands available for data reading: ● “01 – Read Coil Status”...
  • Page 3: Electrical Installation

    DigiGate Profibus ELECTRICAL INSTALLATION Recommendations for installation • When mounting the device on the DIN rail be sure to let a space of approx. 1 cm between the adjacent devices, in order to allow heat dissipation and avoid overheating of the product.
  • Page 4: Configuration Software

    DigiGate Profibus DB9 Adapter The product comes with a DB9 adapter which can be optionally connected at the indicated pins, making the DigiGate connection available in the way recommended by the Profibus DP standard (refer to Fig. 3 and Table 1).
  • Page 5: Operation

    DigiGate Profibus OPERATION Termination resistors The Profibus and Modbus network buses are designed for using termination and/or polarization resistors (see Fig. 4). It is recommended that the resistors be used when the device is installed at one of the bus ends and/or when it is used at a high communication speed (higher than 115200 bps).
  • Page 6: Operation Principle

    Profibus DP network; when flashing slowly (once per second, approximately), it means that the device is in “Configuration mode”. Fig. 6 – Front panel of the DigiGate Profibus Operation principle This product is designed for transmitting data between two networks with distinct communication protocols.
  • Page 7 DigiGate Profibus Once configured, the product will operate in both networks independently, i.e., it will continuously read the Modbus network, feeding the reading table, independently from the connection status of the Profibus network. In the same way, it will proceed communicating with the Profibus master even if there are problems existing in the Modbus network.
  • Page 8 DigiGate Profibus Tables for data interchange Reading Table: Fig. 8 – Reading of the Modbus slaves by the Profibus master The Reading Table or Input Table contains the values read of the Modbus network equipment registers (according to the equipment configuration), besides a status register (1st position of the table). The table corresponds to the field of data sent from the DigiGate to the Profibus master.
  • Page 9 DigiGate Profibus Bit 8 – EQ (Error Qualifier) – valid for “Error Type” (bits 11, 10 and 9) different from 000 • 0 – one slave presenting a failure 1 – more than one slave with failure In case we have more than one reading command for each Modbus slave: 0 –...
  • Page 10 DigiGate Profibus Control Register Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 RCD1 RCD0 • Bit 15 – RD (Request Data Valid) - This bit is inverted by the Profibus master when valid data are to be read.
  • Page 11: Warranty

    DigiGate Profibus WARRANTY Warranty conditions are available on our web site www.novusautomation.com/warranty. NOVUS AUTOMATION 11/11...

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