Basler Electric DGC-2020 - Manual (Page 94)

SPN FMI String Displayed Description
523613 # RAIL PRESSURE Caption String for Rail Pressure
523615 # METERING UNIT VALVE Caption String for Metering Unit Valve
523617 # ECU ERROR String for Diagnostic Trouble Code Indicating ECU Error
MTU Fault Codes
A DGC-2020 connected to a genset equipped with an MTU engine ECU tracks and displays the active
fault codes issued by the MTU engine ECU. Active MTU fault codes can be viewed through
BESTCOMSPlus
® by using the Metering Explorer to expand the MTU tree or through the front panel
display by navigating to METERING, ALARMS-STATUS, MTU FAULT CODES.
Each fault code is displayed with a fault description and the fault number. If the DGC-2020 does not have
descriptive information about a fault number that was received, the fault description will display as “NO
TEXT AVAILABLE”. Fault codes displayed by the DGC-2020 are described in Appendix D, MTU Fault
Codes.
RS-485 (Optional)
DGC-2020 controllers with the optional RS-485 communication port (style number xxxRxxxxx) can be
monitored and controlled via a polled network using the Modbus
™ protocol. The RS-485 port supports a
user-selectable baud rate of 1200, 2400, 4800, or 9600. Odd, even, or no parity is supported. Fixed
communication settings include the number of data bits (8) and stop bits (1). Modbus register values for
the DGC-2020 are listed and defined in Appendix B, Modbus
™ Communication. RS-485 port connections
are made at DGC-2020 terminals 14 (485A), 13 (485B), and 12 (485 SHIELD).
Modem (Optional)
When DGC-2020 hardware version 3 is equipped with the optional external modem port (style number
xxxxxExxx), it can be connected to an external, user-supplied dial-out modem. When DGC-2020
hardware versions 1 and 2 are equipped with the optional internal dial-out modem (style number
xxxxxMxxx), it can be connected to a standard telephone line through its RJ-11 jack. The modem enables
the DGC-2020 to dial up to four pager telephone numbers and annunciate conditions selected by the
user. These conditions include any DGC-2020 alarm or pre-alarm, closure of any programmable contact
input, and an active cooldown timer. The modem accommodates pagers that use seven data bits with
even parity or modems using eight data bits with no parity.
Output Contacts
Output contact operation is controlled by the operating mode of the DGC-2020. The state of the
Emergency Stop contact input also affects output contact operation. When the Emergency Stop contact
input is open (emergency stop condition), the PRESTART, START, and RUN outputs open. When the
Emergency Stop input is closed, all output contacts operate normally.
DGC-2020 output contacts include PRESTART, START, RUN, and up to 12 standard programmable
outputs. Additional output contacts can be accommodated with a CEM-2020 (Contact Expansion Module).
PRESTART
This output closes to energize the engine glow plugs. The PRESTART output can be programmed to
close up to 30 seconds prior to engine cranking. The PRESTART output can also be programmed to
open upon engine startup or remain closed as long as the engine is operating.
During the resting state, the PRESTART can be set to Off, On, or Preheat Before Crank. If Preheat
Before Crank is selected, the PRESTART output will be closed for a time equal to the Pre-crank delay
time prior to re-entering the cranking state. If the Pre-crank delay setting is longer than the rest interval,
the PRESTART output will be closed for the entire rest time.
PRESTART output connections are made through terminals located on the PRESTART relay.
START
This output closes when engine cranking is initiated by the DGC-2020 and opens when the magnetic
pickup (MPU) or generator frequency indicates that the engine has started. Prior to engine starting, the
duration of cranking is determined by the cranking style (cycle or continuous) selected. Cycle cranking
permits up to 7 crank cycles with crank cycle duration of 5 to 15 seconds. The continuous crank time is
adjustable from 5 to 60 seconds.
3-20 DGC-2020 Functional Description 9400200990 Rev X