PLC Progvramming : Servo Motor

 

aplication Information for Servo Motor:

  1. There is a Push Button Switch equipped with a light for initiating Start Operation or returning to the Zero Position.
  2. Another Push Button Switch with a light is used to commence the Positioning Start.
  3. A Limit Switch is employed to establish the Zero Position.
  4. The system incorporates a Ball Screw with a gear lead of 10mm per revolution.
  5. A Servo Motor is utilized for precise control.
  6. A Servo Amplifier aids in controlling and amplifying the servo motor's signals.
  7. The PLC in use is the MELSEC-Q model.
  8. Additionally, a Positioning Module QD75M1 is part of the setup for precise positioning.

Number of PLC Inputs and Outputs Applied:

  1. The PLC system features a minimum of 2 input units:
    • 1 input unit is allocated for the Push Button Switch used for Start Operation.
    • 1 input unit is designated for the Push Button Switch used to initiate Positioning Start.
    • The total number of PLC inputs is at least 2 input units.
  2. The PLC system also offers a minimum of 2 output units:
    • 1 output unit controls the light on the Push Button Switch during Start Operation or at the Zero Position.
    • 1 output unit controls the light on the Push Button Switch during Positioning Start.
    • The total number of PLC outputs is at least 2 output units.

Sequence for Servo Motor Application with Mitsubishi PLC MELSEC-Q:

Step 1: Start Operation / Zero Position a. If the Push Button Start Operation (OPR) is turned ON, activate JOG for manual operation towards LS (Limit Switch) Zero. b. Once LS Zero is triggered (ON), activate Start OPR in Positioning Module QD75M1. c. Wait for the Servo Motor to complete the positioning operation.

Step 2: Positioning Start a. If the Push Button Start is turned ON, initiate Positioning Start No.1 with a target position of 20mm and await completion. b. Once Positioning Complete is detected (ON), initiate Positioning Start No.2 with a target position of 40mm and await completion of this positioning operation.

 

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