D-PRO Protection relay Technical Manual 23
The galvanic insulation guarantees the operating safety of the connection, even among
devices at different distances and with different earth potentials with respect to the controller.
The maximum connection length is 1200m; this also depends on the transmission baud rate
set. It requires the use of a proper shielded cable (see 3.2) with shield connected to earth.
In order to configure the serial port 2, you need to set the parameters:
P.0472: serial port 2 Modbus address
P.0473: serial port 2 baud rate
P.0474: serial port 2 settings
P.0475: serial port 2 Modbus registers order
The description of these parameters is in document [1].
4.7.3
The specifications of the USB protocol do not allow its permanent use in the industrial field
because of the limited cable length and of the quite high sensitivity to electric disturbances on the
PC too. For this reason,
the USB connection cable has to be inserted only when you need
to work on the device and it has to be removed by the JA connector when the operation is
done.
The USB connection with PC is used for two purposes:
-
Insertion of the firmware in the device
-
Parameters configuration
The insertion/replacement of the firmware in the device is a SICES Srl specific operation; besides
the operating FW, it requires a particular procedure and proper programs. Usually it cannot be
carried out by the installer, except for particular cases previously agreed with SICES.
The USB port can be used for the configuration of the parameters with the BoardPrg3 program,
as alternative to the RS232/RS485 or Ethernet connection.
You need to install the
CDC_Sices_Win.inf
driver supplied by SICES on the PC to connect: for
the driver installation, refer to document [6].
Once the driver is installed, the PC will detect the controller as a new serial port to be used exactly
as a RS232 serial port.
The configuration parameters are:
P.0478: USB serial port Modbus address
P.0479: USB serial port Modbus registers order
Summary of Contents for D-PRO
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