SERVOSTAR™ 300
SERVOSTAR™ 300
SERVOSTAR™ 300
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Technical description 07/2010 Kollmorgen<br />
6.9.2 Safety instructions<br />
Drives with a suspended load must have an additional safe mechanical blocking<br />
(e.g. by a motor-holding brake). The amplifier cannot hold the load when STO is<br />
active. That could result in serious injury.<br />
When STO is engaged during operation by separating input STO-Enable from<br />
24VDC, the motor runs down out of control and the servo amplifier displays the<br />
error F27. There is no possibility of braking the drive controlled. If a controlled<br />
braking before the use of STO is necessary, the drive must be braked and the input<br />
STO-ENABLE has to be separated from +24 VDC time-delayed.<br />
If the safety function STO is automatically activated by a control system, then make<br />
sure that the output of the control is monitored for possible malfunction. This can<br />
be used to prevent a faulty output from unintentionally activating the safety<br />
function STO. Since the restart lock is a single-channel system, erroneous<br />
engaging will not be recognized.<br />
The safety function STO does not provide an electrical separation from the power<br />
output. If access to the motor power terminals is necessary, the servo amplifier<br />
must be disconnected from mains supply considering the discharging time of the<br />
DC bus link (intermediate circuit).<br />
Keep to the following functional sequence when the restart lock STO is used :<br />
1. Brake the drive in a controlled manner (speed setpoint = 0V)<br />
2. When speed = 0 rpm, disable the servo amplifier (enable = 0V)<br />
3. If there is a suspended load, block the drive mechanically<br />
4. Activate the restart lock STO<br />
6.9.3 Use as directed<br />
6.9.4 Prohibited Use<br />
The safety function STO is exclusively intended to provide safety for personnel, by preventing<br />
the restart of a system. To achieve this personnel safety, the wiring of the safety<br />
circuits must meet the safety requirements of IEC 60204, ISO 12100, IEC 62061 SIL CL2<br />
respectively ISO 13849-1 PLd, CAT 3.<br />
If STO is automatically activated by a control system, then make sure that the output of<br />
the control is monitored for possible malfunction.<br />
The safety function STO must not be used if the drive is to be made inactive for the following<br />
reasons:<br />
1. - cleaning, maintenance and repair operations<br />
- long inoperative periods<br />
In such cases, the entire system should be disconnected from the supply by the<br />
personnel, and secured (main switch).<br />
2. - emergency-stop situations<br />
In an emergency-stop situation, the main contactor is switched off (by the<br />
emergency-stop button).<br />
36 SERVOSTAR <strong>300</strong> Instructions Manual