Danaher Motion 601...620 Product Manual
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6.7 Switch-on and switch-off behaviorThis chapter describes the switch-on and switch-off behavior of the SERVOSTAR and the stepsrequired to achieve operational stopping or emergency stop behavior that complies with standards.The servo amplifier’s 24 V supply must remain constant. The ASCII commandsACTFAULT (error response) and STOPMODE (ENABLE signal response) dictatehow the drive will behave.STOPMODE ACTFAULT Behavior (see also ASCII reference in the online help of thesetup software)0 (default) 0 Motor coasts to a standstill in an uncontrolled manner1 1 (default) Motor is braked in a controlled mannerBehavior during a power failureThe servo amplifiers use an integrated circuit to detect if one or more input phases (power supplyfeed) fail. The behavior of the servo amplifier is set using the setup software: Under “Response toLoss of Input Phase” (PMODE) on the Basic Setup screen, select:l Warning if the higher-level control system is to bring the drive to a standstill: Warning n05 isoutput if an input phase is missing, and the motor current is limited to 4 A. The servo amplifieris not disabled. The higher-level control system can now selectively end the current cycle orstart bringing the drive to a standstill. Therefore, the error message “MAINS BTB, F16" is out-put on a digital output of the servo amplifier and evaluated by the control system, for instance.l Error message if the servo amplifier is to bring the drive to a standstill: Error message F19 isoutput if an input phase is missing. The servo amplifier is disabled and the BTB contact opens.Where the factory setting is unchanged (ACTFAULT=1), the motor is braked using the set“EMERGENCY STOP RAMP”.Behavior when undervoltage threshold is reachedIf the undervoltage threshold is undershot in the DC bus link (the threshold value depends on thetype of servo amplifier), the error message “UNDERVOLTAGE, F05" is displayed. The driveresponse depends on the ACTFAULT/STOPMODE setting.Behavior with enabled “holding brake” functionServo amplifiers with an enabled holding brake function have a special procedure for switching offthe output stage ( ð p. 21). Removing the ENABLE signal triggers electrical braking. As with allelectronic circuits, the general rule applies that there is a possibility of the internal “holding brake”module failing. Bringing a motor to a standstill using a holding brake in a way that is personnel safealso requires an electromechanical “make” contact for the holding equipment and a suppressordevice for the brake.Behavior of the optional restart lock -AS-With the personnel safe restart lock –AS-, the drive can be secured on standstill using its internalelectronics so that even when power is being supplied, the drive shaft is protected against uninten-tional restart. The chapter “Personnel safe restart lock -AS-” describes how to use the restart lock–AS-. See page 91 onwards.24 SERVOSTAR ® 601...620 Product ManualTechnical description 07/2007 Danaher Motion |
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