Rockwell-automation 1771-QB Linear Pos. Manual de usuario descargar pdf (Pagina 121)

Initializing and Tuning the Axes

Chapter 8

83

Table 8.A

Default

Parameter Block Settings

Parameter Suggested Values Comments

Inches Metric

Analog range 100 100 Check servo valve rating

+Analog calibration constant 2500 6350 Set to maximum velocity in positive direction

-Analog calibration constant 2500 6350 Set to maximum velocity in negative direction

(MS) Transducer calibration constant 9 3 Multiply this by the number of circulations

(LS) Transducer calibration constant 500 5600 Multiply this by the number of circulations

(MS) Zeroposition offset 5 12 Application dependent

(LS) Zeroposition offset 0 700 Application dependent

+Software travel limit 210 533 Set in front of mechanical stop in (+) direction

-Software travel limit 10 25 Set in front of mechanical stop in (-) direction

Inposition band 100 254 Optional  adjust for your application

PID band 500 1270 Rarely necessary to use a smaller value

Deadband 0 0 Rarely necessary or desirable

Excess following error 1000 2540 Nonzero value important for safety

Maximum PID error 1000 2540 Nonzero value important for safety

Integral term limit 10 10 Important to prevent integral windup

Proportional gain 600 600 Follow tuning procedure

Gain break speed 0 0 Rarely necessary

Gain factor 0 0 Rarely necessary

Integral gain 420 420 Set to 70% of proportional gain value

Derivative gain 420 420 Set to 70% of proportional gain value

Feedforward gain 300 300 Use these values or follow optional tuning procedure

Global velocity 1000 2540 Must be less than maximum velocity

Global acceleration 1000 2540 Application dependent

Global deceleration 1000 2540 Application dependent

Velocity smoothing constant 300 762 Application dependent

Low jog rate 100 254 Must not exceed high jog rate

High jog rate 1000 2540 Must be less than maximum velocity

Reserved 0 0

Make sure that you have set the analog configuration switches correctly and that

you have entered the correct range into the parameter block.

ATTENTION: Incorrect analog output configuration can cause

sudden high-speed motion. Incorrect analog output polarity will

cause the axis to accelerate out of position when you close the loop.

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Rockwell-automation 1771-QB Linear Pos. Manual de usuario Pagina 121