SSI America 601...620 6.7 Switch-on and switch-off behavior, 24 SERVOSTAR601...620 Product Manual

6.7 Switch-on and switch-off behavior

This chapter describes the switch-on and switch-off behavior of theSERVOSTAR and the steps

required to achieve operational stopping or emergency stop behavior that complies with standards.

STOPMODE ACTFAULT Behavior(see also ASCII reference in the online help of the

setup software)

0 (default) 0 Motor coasts to a standstill in an uncontrolled manner

1 1(default) Motoris braked in a controlled manner

Behavior during a power failure

The servo amplifiers use an integrated circuit to detect if one or more input phases (power supply

feed) fail.The behavior of the servo amplifier is set using the setup software: Under “Responseto

Loss of Input Phase” (PMODE) on the Basic Setup screen, select:

lWarning if the higher-level control system is to bring the drive to a standstill: Warning n05 is

output if an input phase is missing, and the motor current is limited to 4 A. The servo amplifier

is not disabled. The higher-level control system can now selectively end the current cycle or

start 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.

lError message if the servo amplifier is to bring the drive to a standstill: Error message F19 is

output 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 reached

If the undervoltage threshold is undershot in the DC bus link (the threshold value depends on the

type of servo amplifier), the error message “UNDERVOLTAGE, F05" is displayed. The drive

response depends on the ACTFAULT/STOPMODE setting.

Behavior with enabled “holding brake” function

Servo amplifiers with an enabled holding brake function have a special procedure for switching off

the output stage (ðp. 21). Removing the ENABLE signal triggers electrical braking. As with all

electronic 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 safe

also requires an electromechanical “make” contact for the holding equipment and a suppressor

device 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 internal

electronics 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 page91 onwards.

24 SERVOSTAR®601...620 Product Manual

Technical description 07/2007 Danaher Motion