M2M IDG500AM-0T001, Руководство пользователя, Страница: 297 / 357

M2M Cellular Gateway
Index skipping is used to reserve slots for new function insertion, when required.
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5.d Communication Bus
The IOG product series provides the DB ‐ 9 male port for various serial communication use through
connecting the RS ‐ 232 or RS ‐ 485 serial device to an IP ‐ based Ethernet LAN. These communication
protocols make user access serial devices anywhere over a local LAN or the Internet easily. They
include "Virtual COM" and "Modbus".
5.d.1 Port Configuration
Before using the function of Virtual COM or Modbus, you need to configure the DB ‐ 9 male port
first.
In "Port Configuration" page, there is only one configuration window for the serial port settings.
The "Configuration" window can let you specify serial port parameters including the operation mode
being "Virtual COM", "Modbus" or disabled, the interface being "RS ‐ 232" or "RS ‐ 485", the baud rate,
the data bit length, the stop bit length, the flow control being "RTS/CTS", "DTS/DSR" or "None", and the
parity.
The port configuration screen allows user to select and switch from one communication protocol
to another for the serial port. The type of the supported protocols varies with gateway model
purchased. They are Virtual COM, Modbus, and IEC60870 ‐ 5. User may pre ‐ configure all of them in
each of the protocol configuration screen and use port configuration screen to do a quick
selection.