STEP Elevator Control System Mini-Class (3): Fast and Slow Car Adjustment
2024-02-04
The elevator control system is the core of an elevator, determining its operational quality and efficiency. With 28 years of deep expertise in the elevator industry, STEP has consistently driven the development of its elevator control system products with “user value” at its heart, striving to perfect every intricate control algorithm, drive mechanism, and user experience with relentless dedication and meticulous attention to detail.
To help users get started, we’ve launched a series of short tutorials that will introduce the STEP elevator control system in phases, covering various aspects such as debugging, interfaces, and functional testing. We invite everyone to watch, learn, and engage in discussions.
For this issue, let’s still focus on STEP Core Control Cabinet C7000+ & G9000 For example, let’s explore how the STEP elevator control system performs fast and slow car adjustments while ensuring the safe operation of the elevator and providing passengers with a comfortable experience.
C7000+ & G9000 Control System Debugging Guide
01 Mainboard Input Point Definition
C7000+ Motherboard Input Pin Definitions
G9000 Motherboard Input Pin Definitions
02 Introduction to the G9000 Control Panel
03 Preparations Before Slow-Train Debugging
1. Refer to the product user manual and the electrical schematic diagram to check whether the wiring of each component is correct.
2. Check whether there is any connection between the high-voltage and low-voltage sections: Use the ohmmeter setting on a multimeter to measure the resistance to ground between different circuits (it should be ∞).
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The insulation resistance of the three-phase power lines to ground should be greater than 0.5 MΩ.
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The insulation resistance of the motor power lines to ground should be greater than 0.5 MΩ.
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The insulation resistance between the input terminal and ground for 220V should be greater than 0.25 MΩ.
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The insulation resistance of the communication cable to ground should be greater than 0.25 MΩ.
Note: Any items exhibiting short-circuit phenomena must be eliminated.
3. Check the control cabinet and motor to ensure that the grounding wire of the safety circuit is reliably grounded, thereby guaranteeing personal safety.
04 Inspection of Wiring Before Debugging the Slow Train
1. The elevator traction machine, steel cables, car, counterweight frame, and other components have been properly installed, and there are no obstructions in the hoistway.
2. Connect the power supply cables, including the three-phase input R, S, and T as well as the three-phase output U, V, and W. Be sure to ensure that the wiring is correct.
3. Connect the power cable for the brake, making sure to connect the positive and negative terminals correctly.
4. Connect the encoder cable.
5. Short-circuit part of the safety circuit by borrowing methods such as using D0 and D1 plugs.
6. Ensure that the safety circuit and the door interlock circuit are conducting.
7. Ensure that the upper and lower speed-change switches are wired correctly.
8. The car-top inspection switch is in the normal position.
9. Connect the control cabinet to an AC380V power supply and monitor the elevator status via the onboard indicator lights. (The CPU operation light should flash rapidly.) This indicates that the system is functioning normally and no faults have been reported.
10. The safety and door-lock circuit indicator lights should be illuminated; otherwise, check whether the jumper wires are connected correctly.
05 Slow Train Debugging Procedure
1. Basic parameter settings
2. In case of an emergency, the elevator can be manually operated either upward or downward. The system will automatically adjust itself, and the host unit will emit an electromagnetic sound. After about 3 seconds, the host unit will start rotating at inspection speed.
3. Monitor the status via the handheld operator → Check the drive status and verify that the current and running speed are normal.
4. If the maintenance running current is too high or faults such as 71#, 91#, or 115# (overcurrent faults) are reported, follow these troubleshooting steps:
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Check whether the motherboard parameters are correct (F201-F211).
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Confirm that the encoder and related signals are correct. You can manually rotate the encoder and monitor whether Vfbk shows a speed.
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Confirm the phase sequence of the output power lines. If the phase sequence is incorrect, adjust the wiring of any two output phases.
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Check whether the brake is open. If it’s not open, verify the relevant wiring connections.
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If there is no steel wire rope installed, appropriately reduce the zero-speed PI value.
5. If the elevator’s running direction is inconsistent with the given instruction, change F234 from 0 to 1.
6. When performing inspection operations on the car top, the terminating resistor J2 on the car-top control panel SM.02/D1 must be shorted. During car-top inspection, the operator display will show “Car Inspection.” When the up/down buttons for car-top inspection are pressed, the input points HX12/HX13 on the car-top panel will light up.
7. Since the safety circuit needs to be disconnected for maintenance on the car top, if the safety circuit is conductive while the car top is in maintenance mode, the main board will report fault No. 33. In this case, you need to short-circuit signal points 103 and 130, as well as 118, 116, 119, and 120. Also, short-circuit signal points 130A and 130B on connector T9 of the car-top board. (Refer to the safety circuit diagram.)
06 Express Train Debugging Procedure
1. The elevator traction machine, steel cables, car, counterweight frame, and other components have been properly installed, and there are no obstructions in the hoistway.
2. Connect the power supply cables, including the three-phase input R, S, and T as well as the three-phase output U, V, and W. Be sure to ensure that the wiring is correct.
3. Connect the power cable for the brake, making sure to connect the positive and negative terminals correctly.
4. The vertical height and depth of the flat-layer plug-in board are properly positioned, with no abnormalities such as false operations or failure to operate.
5. The forced speed-change switches at the top and bottom of the hoistway are properly installed and functioning normally.
6. Confirm the car communication and termination resistor: On the car control board SM.02/J1, set switch SW1 to ON (at this point, the resistance should be 120 ohms). The communication lights on the top-of-car control board SM.02/D1 and the car control board SM.02/J1 should flash accordingly. Otherwise, fault code #8 will be reported.
7. When the elevator is at an intermediate floor, the speed-change switch signals X4 and X5 light up; when the elevator is level with the landing, the leveling switch signals X6 and X7 light up.
8. During maintenance ascent, the sequence of actions is X7 > X6. As the elevator approaches the upper terminal station, X4 will activate. It must be ensured that once X4 activates, it remains active until reaching the limit switch, and there shall be no reset during this period.
9. During maintenance descent, the sequence of actions is X6 → X7. As the elevator approaches the lower terminal station, X5 will activate. It must be ensured that once X5 activates, it remains active until reaching the limit switch, and no resetting is allowed during this period.
10. When the maintenance operation reaches the door zone, check whether the door-zone indicator lights on the SM-11-C1/C2 board are lit.
11. In the monitoring menu of the handheld operator, monitor the input status of the door-position sensors. If the door-position switch is a normally closed contact, then after the door opens to the fully open position: HX0 must be “1” and HX1 must be “0”; after the door closes to the fully closed position: HX0 must be “0” and HX1 must be “1”.
12. Elevator shaft self-learning: In the emergency electric operation mode, use the handheld debugger to enter the shaft self-learning menu. Once the emergency electric operation switch is switched to normal, the elevator will automatically return to the first floor, then proceed upward, and automatically learn information such as floor heights and the positions of shaft switches. After reaching the top-floor level and achieving leveling, the operator will receive a prompt indicating that the shaft self-learning has been successfully completed; press the Enter key to confirm.
13. Conduct operational tests of the elevator express service to verify the accuracy of in-cab commands and external call requests.
14. Observe functional tests including elevator door opening and closing status, leveling adjustment, overload detection, and light curtain operation.
07 Simplified Flowchart of the Debugging Process
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