2.5.6.2CAN DTC Information Display Requirements
1. Information for the operator needs to be brief and clear, so that action can be taken quickly, if required.
•
Activate Warning Lamp
•
Activate Switch-Output
•
Display Short Text
2. For the workshop it is more important to get detailed information, so the cause can be found and fixed.
•
DTC List with SPN, FMI and Occurrence Count
The DTC List can also be viewed by the operator, but requires detailed knowledge of the CAN devices reporting the DTCs.
Also it can be expected, that the workshop will have other diagnostic tools, which can access even more Information than
J1939 DM1.
2.5.6.3CAN DTC Display Functions
2.5.6.3.1 DTC Reception
0ne to five independent DTC channels can be configured. Every channel is able to receive the DTCs from one CAN device
(Source Address).
If DTCs are received from any of the configured CAN devices, they will be stored into a DTC receive buffer. The buffer will be
able to hold a total of 40 DTCs and will be implemented as a ring buffer, so that old DTCs can be overwritten by newly recei-
ved DTCs.
Every newly received DTC will be compared with latest DTC`s in the ring buffer. If they are different it will be stored in the ring
buffer. Thus avoid overflowing of the ring buffer by toggling transmitted DTC`s.
2.5.6.3.2 DTC List
If the service personnel or the operator wants to check for received DTCs, he can step through the display list until coming to
the DTC-Displays. There will be no automatic display, which comes up and must then be acknowledged. Therefore it is possi-
ble to prevent annoying displays coming up, if DTCs are received, which have no actual relevance.
The DTC List function will provide access to the DTCs inside the DTC receive buffer. One DTC Display will exist in the di-
splay list for every configured DTC channel (channel 1 to 5).
To see the received DTCs of one channel the operator presses and holds the button for longer than 2sec. At this time the pro-
cessor will transfer the received DTCs from the DTC Receive Ring Buffer to the DTC List. Only the DTCs of the selected
channel will appear in the DTC List. The most recent DTC will be shown first. Every short press will lead to earlier received
DTCs, until all DTCs have been shown or the button is pressed and held for more than 2sec.
The DTC List will be cleared at ignition off/ on (configurable).
2. Functional Specification
Product Manual
Technische Änderungen vorbehalten Technical details subject to change
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TU00-0726-0000002
0609
Summary of Contents for CANcockpit Series
Page 53: ...June 2009 Training WinGauge Software page 1 ...
Page 54: ...Components and Concept June 2009 Training WinGauge Software page 2 ...
Page 55: ...Example of a fully configured Instrumentation June 2009 Training WinGauge Software page 3 ...
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Page 80: ...Examples of new defined Symbols June 2009 Training WinGauge Software page 28 ...
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