Model 9600/9700 Swing-Reach ® Lift Truck
Section 8. Theory of Operation Functional Operation
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Checks EPROM
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Looks for a jumper at CMID1 (JPC22 pin 22 to JPC24 pin 4) to determine that it has the correct software for the configured identity
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Checks deadman switches (S9 and S23) for correct position
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Establishes communication with the TM
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Verifies traverse/reach (VR4) and rotate (VR3) control handle inputs are not out of neutral
GM SelfTest Sequence •
Checks the microprocessor to make sure it is enabled and all portions are functional
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Runs software checksum calculation
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Tests RAM
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Checks EPROM
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Establishes communication with the TM
Emergency Power Off The CM and TM monitor the status of the Emergency Power Off (EPO) switch (S21). Both the CM and TM can generate an error code when an open in the circuit is detected. Pressing the EPO directly removes the B+EPO voltage from the K1, K2, and K3 coils on the Fuse/Relay Card. With B+ to the coils interrupted, none of the relays activate and B+ is removed from the brake, contactor, solenoid coils, and power amplifiers.
Lift/Lower System Main Lift/Lower Lifting the main mast requires both right hand deadman pedal switches (S2 and S23) to be activated. The TM processes information received from the CM (via BUS1) regarding VR2 position to determine direction and rate of the request. To lift, the TM activates the Main Lift Select Solenoid (SOL4) through its internal coil driver. To lower, the TM activates the Main Load Hold (SOL3) and Lower Solenoid (SOL1). Speed
Publication: 1089040, Issued: 08 Apr 2016
is reduced as necessary based on fork height. During normal run, the truck decelerates near the fully extended or lowered position (refer to “Height Calculation” on page 8-10). Optional devices may cause additional restrictions or inhibit the function. Once the TM has determined the direction and rate requested, it communicates that to the LPA. The LPA controls the LPC, and the Lift Motor speed and direction for optimal performance. The LPA monitors Lift Motor current and imposes restrictions as necessary. The LPA sends temperature information to the TM which may impose restrictions.
Mini Lift/Lower Lifting the mini-mast requires both right hand deadman pedal switches (S2 and S23), the left hand deadman switch (S9), and the Mini Lift Select switch (S6) to be activated. The TM processes the information received from the CM (via BUS1) regarding VR2 position to determine the direction and rate of the request. To lift, the TM activates the Mini Lift Select Solenoid (SOL6) through its internal coil driver. To lower, the TM activates the Mini Load Hold Solenoid (SOL5) and Lower Solenoid (SOL1). Speed is reduced as necessary based on fork height. During normal run, the truck decelerates near the fully extended or lowered position (refer to “Height Calculation” on page 8-10). Optional devices may cause additional restrictions or inhibit the function. Once the TM has determined the direction and rate requested, it communicates the speed requested to the LPA. The LPA controls the LPC, and the Lift Motor speed and direction for optimal performance. The LPA monitors Lift Motor current and imposes restrictions as necessary. The LPA sends temperature information to the TM which may impose restrictions.
Traction System Travel requires both right hand deadman pedal switches (S2 and S23) to be activated. The TM processes the information received from the CM
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