Basler Electric DGC-2020HD - Manual (Page 13)

9469300990 Rev B 3
A second dimension of security is provided by the ability to restrict access for any of the access areas to
only specific communication ports. For example, you could set up security to deny access to control
commands through an Ethernet port.
Security settings affect read and write access. Refer to the Security chapter for more information.
Communication
DGC-2020HD communication features include a mini-B USB port, RS-485 port, two copper Ethernet ports
or one fiber optic Ethernet port (optional), and SAE J1939 interface.
USB Port
The USB communication port can be used with BESTCOMSPlus® software to quickly configure a DGC-
2020HD with the desired settings or retrieve metering values and event log records.
RS485 Port
An RS485 communication port uses the Modbus™ communication protocol and enables remote control
and monitoring of the DGC-2020HD over a polled network.
Ethernet Port(s)
Depending on style number, each DGC-2020HD is equipped with either dual copper (100BaseT) Ethernet
communication ports (style xxxxDxxxx) or a fiber optic (100BaseF) Ethernet communication port (style
xxxxFxxxx).
Ethernet ports provide communications between the DGC-2020HD and a PC via BESTCOMSPlus or
other DGC-2020HDs in a network. An Ethernet connection to a PC running BESTCOMSPlus provides
remote metering, setting, annunciation, and control of the DGC-2020HD. Ethernet communication
between DGC-2020HDs allows for generator sequencing on an islanded system.
CAN Interface
The CAN (Control Area Network) interface provides high-speed communication between the DGC-
2020HD and the engine control unit (ECU) on an electronically controlled engine. This interface provides
access to oil pressure, coolant temperature, and engine speed data by reading these parameters directly
from the ECU. When available, engine diagnostic data can also be accessed. The CAN interface supports
the following protocols:
• SAE J1939 Protocol - Oil pressure, coolant temperature, and engine speed data are received
from the ECU. In addition, DTCs (Diagnostic Trouble Codes) help diagnose any engine-related
failures. The engine DTCs are displayed on the front panel of the DGC-2020HD and may be
obtained using BESTCOMSPlus® software.
• MTU Protocol - A DGC-2020HD connected to a genset equipped with an MTU engine ECU
receives Oil pressure, coolant temperature, and engine speed data from the engine controller,
along with various alarms and pre-alarms that are MTU-specific. In addition, the DGC-2020HD
tracks and displays the active fault codes issued by the MTU engine ECU.
DGC-2020HD Introduction