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6.8.3 Implementation of the Stop Category 0

Bringing the motor to a standstill by immediately switching off the amplifier power supply

(STOPMODE & ACTFAULT parameters set to 1). The switching sequence is unambig

uously fixed by the circuit, and must be followed, to prevent undesirable error signals and

failure of the servo amplifier.

It is not possible to achieve a Category 0 shut-down with the servo amplifier alone, since

hard-wired electromechanical components are compulsory for this type of disconnection.

A brake that is built into the motor must have an additional electromechanical control cir

cuit, as well as the control through the AX25xx, in order to meet Category 0.

Normally, a brake in a servo motor only has the function of a holding brake. To ensure an

emergency stop function, the braking torque that is required must be checked. If the hold

ing brake fulfills the dynamic requirements, it must be taken into acount that this applica

tion will cause increased wear.

Circuit suggestion

(with EMERGENCY STOP Category 0, control function with contactor relays)

28 AX2500 Product Manual

Technical description 06/2007 BECKHOFF

AX2500

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Beckhoff AX2500 Bedienungsanleitung Seite 28