Schneider Electric Altivar 58 VW3-A58101 Instrukcja Użytkownika Pobierz pdf (Strona 62)

ALTIVAR

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58 Keypad Display VVDED397047US R8/01

Chapter 2 — Menus 08/01

Fast Stop

Fast stop is a braked stop with the deceleration ramp time reduced by a

programmable coefficient (see dCF on page 43). Fast stop is obtained by

opening the logic input assigned to the function (setting it to state 0), or

by configuring fast stop under type of stop (Frt on page 41).

Motor Switching

This function allows a single drive controller to control two motors with

different power ratings, one at a time. The ratio between the motor power

ratings is set with the PCC parameter in the 3—Drive menu (see

page 43).

If the two motors have different power ratings, enclosure types, or speed

ratings, then separate motor contactors, thermal protection, and short

circuit protection will be required for each motor. This function

automatically inhibits motor thermal protection of the second

motor.

The motor switching command will not be taken into account unless the

motor is stopped. If the output contactor opens while the motor is running,

the drive controller may trip on overcurrent or overvoltage which may

result in damage to the drive controller. The following parameters are

automatically scaled by the command from the logic input:

• DC injection current

• Brake release current

• Nominal motor current

EXTENDED STOPPING TIME

• Deceleration time during fast stop may be automatically

extended depending on braking ability of the drive controller.

• A dynamic brake or mechanical stopping/holding brake may be

required for consistent stopping times independent of motor load

conditions.

• Fast stop does not function during loss of power or drive

controller fault.

Failure to follow these instructions can result in death, serious

injury, or equipment damage.

WARNING

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Schneider Electric Altivar 58 VW3-A58101 Instrukcja Użytkownika Strona 62