Model 5200 High-Level Orderpicker
Section 8. Theory of Operation Closing Deadman Switches
• JPC7-5 (Deadman 2 S23) • JPC7-8 (24" limit switch S6) • JPC7-11 (60" height switch S7) • JPC12-15 (optional sidegate switch 2, S20) • JPC1-1 (operator display) 8. +5 volts is present at JPC2-3 and JPC12-12 (steer encoder) on the Carriage Manager. 9. +5 volts is present at PT6-3 steer feedback encoder) on the Steer/Tractor Manager. With the wire guidance option, the Guidance Manager receives: 1. Battery positive at JPS2-11 as B+ESTOP. This is also used by the power supply on the Guidance Manager (GM) to generate +12 volts that is used by the Guidance Manager microprocessor, internal circuitry, and the filter card. The +12 volts is also supplied to: • Tractor sensor at JPW2-15 • Load sensor at JPW1-15 • Speed encoder at JPS1-19 2. Battery negative at JPS2-24. 3. Battery negative at JPS4-3 as DGND. When the key switch is first turned ON, the microprocessors perform a SelfTest of certain inputs and outputs. The Carriage Manager checks: 1. The +12 volt supply from the Steer/Tractor Manager. 2. Checks to make sure the steer tiller encoder is plugged in. 3. Checks the state of Deadman 1 and informs the STM. 4. Checks the voltages from the travel pot and lift pot and sends the voltages to the STM. The Steer/Tractor Manager checks: 1. The +12 volt supply.
2. The voltages from the travel pot and lift pot and compares them to the learned neutral and out-of-range values. 3. The state of the P contactor at JPT12-3. 4. The state of the mast switches. 5. The state of the EPO switch at JPT10-3. 6. The state of the Deadman switches. 7. The state of the PC contactor at JPT12-3. 8. Battery Voltage for correct range at B+KEY. 9. Calculates BSOC using B+PC. 10. Requests feedback from the Guidance Manager on the results of its SelfTest. 11. Inputs from the TPA to verify its operation. The Guidance Manager checks: 1. To make sure the filter card is plugged in. If a problem is detected, the Steer/Tractor Manager prevents lift truck operation and tells the CM to display a corresponding fault code on the operator display.
Closing Deadman Switches Stepping on the deadman pedal closes deadman switches S2 (Deadman 1) and S23 (Deadman 2). Both switches must be closed to travel, lift/lower and/or steer. If either switch opens while traveling, the travel command to the traction power amplifier stops and the brake is applied. 1. With S2 closed, a circuit is completed between JPC7-3 and JPC7-1 on the Carriage Manager. 2. With S23 closed, a circuit is completed between JPC7-6 and JPC7-4 on the Carriage Manager. 3. With the S2 (Deadman 1) circuit complete, the microprocessor on the CM detects that the switch is closed. The Carriage Manager communicates to the Steer/Tractor Manager via the transmit line that switch S2 is closed.
Publication Number: 1043922B, Revised: 2 Sept 2015
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