Rockwell-automation 34C473 General Purpose AC Drive DB Kit 5, 7-1/2, 1 Uživatelský manuál stáhnout pdf (Strana 5)

ADJUSTMENTS

DANGER

ADJUSTMENTS ARE MADE WITH POWER ON.

EXERCISE EXTREME CAUTION WHEN PERĆ

FORMING THESE ADJUSTMENTS AS HAZĆ

ARDOUS VOLTAGE EXISTS.

Dynamic

braking action is automatic and is not

adjust

able.

Current limit controls are provided for adjustment

motoring and regenerative current.

1. Adjust

both the Motoring

Current Limit and the Re

gen Current Limit potentiometers on the CLSA

Board

to the approximate

center of their ranges (12

o'clock

position).

2. Adjust

both the Accel Rate and the Decel Rate po

tentiometers on the VSAA Board fully clockwise

(max

rate) (Figure 4).

Setting the Motoring Current Limit

3. Turn

the Speed Setting potentiometer on the Oper

ator's Control Station fully clockwise (max speed)

and

press

the Start rocker switch. If the rate of accel

eration

of the

motor is as desired, the Motoring Cur

rent Limit is adjusted properly. If the acceleration

rate

is not fast enough, go to Step 4; if too fast, go

to Step 5.

4. If the acceleration rate of the motor is not fast

enough,

press the Stop rocker switch and allow the

motor to stop. Adjust the Motoring Current Limit

1/8th turn clockwise and, with the Speed Setting

potentiometer still at maximum speed, press the

Start rocker switch. Continue to repeat this proceĆ

dure

until the desired acceleration

rate is reached.

NOTE:

If a point is reached where the drive shuts off

and

coasts to a stop, the Motoring Current Limit

has

been turned too far clockwise. (The Motoring CurĆ

rent

Limit

has exceeded the Instantaneous Electron

ic Trip [IET] current setting of the controller.) Reset

the drive by depressing the Stop rocker switch on

the

Operator's Control Station. Then turn the Motor

ing Current Limit a little counterclockwise and reĆ

peat the procedure described in Step 3.

5. If

the acceleration rate

of the motor is too fast, adjust

the Accel Rate potentiometer on the VSAA Board

about 1/4th turn counterclockwise and check the

acceleration according to Step 3. Continue to reĆ

peat this procedure until the desired acceleration

rate

is reached.

Setting the Regen Current Limit

CAUTION:

Should the regenerative

current limit be

set

below a particular motor's

minimum current lev

el, the regenerative current limit circuitry may proĆ

hibit

the motor

from decelerating. Reset the regen

erative

current limit as described below

6. Set

the Speed Setting potentiometer on the Opera

tor's Control Station fully clockwise (max speed)

and

run the drive at maximum speed. Then quickly

turn the Speed Setting potentiometer fully

counter

clockwise

(min speed). If the rate of deceleration of

the

motor is as desired, the Regen Current Limit

adjusted correctly. If the deceleration rate is too

long,

go to Step 7; if too short, go to Step 8.

NOTE:

The Regen Current Limit adjustment is not in

tended

to replace the Decel Rate adjustment on the

controller to provide long deceleration times.

7. If the deceleration rate of the motor is too long, inĆ

crease the Regen Current Limit adjustment 1/8th

turn

clockwise and repeat the procedure

described

Step 6. Continue this procedure until the

desired

deceleration

time is reached.

NOTE:

If a point is reached where the drive shuts off

and coasts to a stop, the Regen Current Limit has

been

turned too far clockwise.

(The Regen Current

Limit has exceeded the Instantaneous Electronic

Trip

[IET] current setting of the controller

.) Reset the

drive by depressing the Stop rocker switch on the

Operator's Control Station. Then turn the Regen

Current Limit a little counterclockwise and repeat

the procedure described in Step 6.

8. If

the deceleration rate

of the motor is too short, ad

just

the Decel Rate potentiometer on the

controller

about

1/4 turn counterclockwise and check the de

celeration according to Step 6. Continue to repeat

this procedure until the desired deceleration is

reached.

1 2 3 4 5 6 7 8

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