Canbus Troubleshooting - JLG 1200SJP Service Maintenance Manual

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SECTION 6 - JLG CONTROL SYSTEM

6.20 CANBUS TROUBLESHOOTING

The PLATFORM MODULE and the CHASSIS MODULE have "Ter-

minator Resistors" located inside the modules, these resistors

squelch high speed signal reflections in the CANbus transmis-

sion lines. The value of the terminators is determined by wire

properties, this includes the type of insulation and geometry,

combined to determine the perfect value for bus termination.

Improper values or missing terminators allow bus ringing. A

complete CANbus circuit (wired in parallel) is approximately

60 Ohms at the "T" fitting inside the Ground Station or at the

Boom Length & Angle Module. Each individual circuit from

their respective Module should read approximately 120 Ohm.

For CANbus connections, refer to Figure 6-25., Figure 6-26.,

Figure 6-27., Figure 6-28., Figure 6-29., and Figure 6-30.

Figure 6-25. CANbus Connections Diagram

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