Rockwell-automation SA500 Drive Configuration and Programming Uživatelský manuál stáhnout pdf (Strana 116)

E-2

SA500 Drive Configuration and Programming

If application performance in the constant power region is at expected levels, you do

not need to perform the following calibration procedure.

If application performance in the constant power region is not at expected levels, you

may be able to improve it by changing the Iz current values stored in the STATOR_IZ

tunables. See table E.1. The default current values were chosen to work with a wide

variety of motors. The performance of a specific motor may be improved by performing

the following calibration procedure. This procedure determines the motor’s custom

current values and stores them in the STATOR_IZ tunables.

Step 1. Turn off and lock out power.

Step 2. Disconnect the load from the motor.

Step 3. Connect an analog voltmeter across the motor terminals.

Step 4. Turn power on.

Step 5. Set Gear-in-Speed to four times the motor’s base RPM.

Step 6. Set Overspeed to 110% of Gear-in-Speed.

Step 7. Put the tasks in the rack into run.

Step 8. Set TUNE_IZ@ to 1 (register 101, bit 10).

Step 9. Verify that TUNED_IZ@ = 1. The STATOR_IZ reference table will then fill in

with default values.

Step 10. Reset TUNED_IZ@ to 0 (register 101, bit 10).

Step 11. Set NO_INTR@ to 1 (register 101, bit 0).

Step 12. Use the following equation to calculate the number of speed reference counts

that are equivalent to the motor’s base speed times the desired speed range

(1.1 to 4.0):

Table E.1 – STATOR_IZ Tunable Values

Reference

Point

1. The number of reference points used in the calibration procedure is dependent upon the motor’s base

speed times the speed range (1.1 to 4.0).

Speed Reference

(in counts)

Tunable Where the Iz

Current Value is Saved

1 409 STATOR_IZ0E2%

2 1023

(at maximum speed)

STATOR_IZ1E2%

3 1125 STATOR_IZ2E2%

4 1227 STATOR_IZ3E2%

5 1329 STATOR_IZ4E2%

6 1635 STATOR_IZ5E2%

7 1941 STATOR_IZ6E2%

8 2247 STATOR_IZ7E2%

9 2859 STATOR_IZ8E2%

10 4095 STATOR_IZ9E2%

4095 (Counts)

Gear in

–

Speed RPM

()–

---------------------------------------------------------------------

X (Counts)

Base Speed (RPM) Speed Range

----------------------------------------------------------------------------------------------=

1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 125 126

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