Lenze 8400 TopLine - Manual (Page 341)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
341
6 Encoder/feedback system
6.3 Multi-Encoder (X8)
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6.3.3.2 Important notes for using an SSI laser position encoder
If you are using an SSI laser position encoder at X8 and, deviating from the Lenze setting, you have
activated the position control for quick stop ( C00104/1 - bit 0 and/or bit 1 set), please note the
following:
If the laser beam is interrupted, due to the "TroubleQuickStop" following error standard response,
the drive may move unexpectedly.
• A drive that had already reached the position-controlled standstill can execute a movement.
• A drive that is ramping down can continue running.
Possible countermeasures:
• Do not use the controller with the above-described parameter setting.
• By implementing suitable other measures, ensure that, in terms of safety aspects, the response
described is acceptable for the specific application case.
• Monitor the valid position:
• Use parameters C01112/2 and C01112/3 to define a value range for valid positions.
• Configure the LS_MultiEncoder .bFail output so that controller inhibit is set when the output
at the drive is active. Take other requirements relating to the application into consideration
(e.g. application of brake).
• Resulting drive behaviour: If the value range set is exited, the LS_MultiEncoder .bFail output
activates controller inhibit.  Encoder value monitoring
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Note!
The response of the drive to interruptions of the laser beam is always part of the error
scenarios to be checked during commissioning.