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Line 6: |
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| * FMB641 CAN1 connected to vehicle's FMS(J1939) BUS line<br> | | * FMB641 CAN1 connected to vehicle's FMS(J1939) BUS line<br> |
− | * FMB641 CAN2 connected to vehicle's Tachograph - Instructions can be found on [[FMB640_and_Tachograph_Solution|FMB640 and Tachograph Solution]] wiki page; | + | * FMB641 CAN2 connected to vehicle's Tachograph - Instructions can be found on [[FMB641 and Tachograph Solution]] wiki page; |
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| ==Tachograph Settings== | | ==Tachograph Settings== |
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| [[image:FMB640_Tachograph_settings2.gif]] | | [[image:FMB640_Tachograph_settings2.gif]] |
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− | FMB641 can be wired to Tachograph using instructions provided in [[FMB640_and_Tachograph_Solution|FMB640 and Tachograph Solution]] wiki page. | + | FMB641 can be wired to Tachograph using instructions provided in [[FMB641 and Tachograph Solution]] wiki page. |
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| '''Alternative DDD download''' | | '''Alternative DDD download''' |
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| [[image:FMB640_FMS_settings.gif]] | | [[image:FMB640_FMS_settings.gif]] |
| + | |
| + | ==CAN Termination resistor== |
| + | |
| + | FMB641 has electronically controllable CAN termination resistor on CAN1 and CAN2 lines. |
| + | This means that CAN line 120Ω resistance can be switched ON or OFF. |
| + | |
| + | [[image:CAN Terminator.png]] |
| + | |
| + | In most cases - devices in CAN communication lines have 120Ω between CAN LOW and CAN HIGH lines. When connecting two CAN devices in parallel - overall resistance becomes 60Ω which is suitable for correct CAN communication. |
| + | <br>By default FMB641 CAN Termination resistor is enabled - therefore when connecting to only one external CAN device - overall resistance will be 60Ω. |
| + | <br>If FMB641 has to be connected to CAN line where there already are 2 main devices with 120Ω resistance - <b>CAN termination resistor has to be turned off </b>. Then overall resistance of CAN line is left unchanged at 60Ω - therefore CAN communication is uninterrupted. |
| + | |
| + | [[image:CAN_Terminator_scheme.png]] |
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| [[Category:FMB641 Configuration]] | | [[Category:FMB641 Configuration]] |