Winco DGC-500 - Manual (Page 27)

DGC-500 Functional Description 3-7
Table 3-3. Diagnostic Information Obtained Over the CAN Interface
Parameter
Transmission
Repetition Rate
Active diagnostic trouble code 1 s
Lamp status 1 s
Previously active diagnostic trouble code on request
Request to clear previously active DTCs on request
Request to clear active DTCs on request
DTCs are reported in coded diagnostic information that includes the Suspect Parameter Number (SPN),
Failure Mode Identifier (FMI), and Occurrence Count (OC). All parameters have an SPN and are used to
display or identify the items for which diagnostics are being reported. The FMI defines the type of failure
detected in the subsystem identified by an SPN. The reported problem may not be an electrical failure but a
subsystem condition needing to be reported to an operator or technician. The OC contains the number of
times that a fault has gone from active to previously active.
Horn Output
This output connects to a user-supplied audible signal device. A change in operating status or an alarm
condition energizes the horn output continuously and a pre-alarm condition pulses the horn output on and off.
The annunciation continues until the condition subsides or until the front-panel Alarm Silence pushbutton is
pressed.
The horn output supplies 15 mAdc maximum at the lesser of 24 Vdc or the battery voltage level. A horn
compatible with the DGC-500 is available from Basler Electric as part number 29760. Horn output connections
are located at terminals P24 (+) and P25 (–).
Output Contacts
All output contacts are electrically isolated from each other and from the DGC-500 internal circuitry. Output
contact operation is controlled by the operating mode of the DGC-500 and the system. The output contacts
are also affected by the status of the Emergency Stop contact input. When the Emergency Stop contact input
is open (emergency stop condition), all output contacts open. When the Emergency Stop contact input is
closed, all output contacts operate normally.
Five output contacts are available: Pre-Start, Engine Crank, Fuel Solenoid, and two Programmable output
contacts.
Pre-Start
This output closes to energize the engine glow plugs. The Pre-Start output can be programmed to close up
to 30 seconds prior to engine cranking. The Pre-Start output can also be programmed to open upon engine
startup or remain closed as long as the engine is operating.
Crank
This output closes when engine cranking is initiated by the DGC-500. The length of time that the contacts
remain closed is determined by the cranking style selected (either continuous or cycle). Cranking continues
until the magnetic pickup or generator frequency indicates that the engine has started.
Fuel
This output closes when engine cranking is initiated by the DGC-500. The Fuel output remains closed until
an off command is issued and the engine stops.