Feedback
For speed control with a servo inverter, the servo motor can be equipped with the following
feedback systems:
Inverter Feedback without funconal safety
Resolver Absolute value encoder Digital absolute value encoder
for OCT
i950 servo inverter RS0 AM128-8V-H AM20-8V-D
i700 servo inverter RS0 AM128-8V-H -
8400 TopLine inverter drives RS0 AM128-8V-H -
9400 HighLine servo drives RS0 AM128-8V-H -
Inverter Feedback with funconal safety
Resolver Absolute value encoder Digital absolute value encoder
for OCT
i950 servo inverter RV03 AM128-8V-K2 AM20-8V-D2
9400 HighLine servo drives RV03 AM128-8V-K2 -
Feedbacks in the environment of funconal safety
Motors can perform speed-dependent safety funcons for safe speed and/or safe relave
posion monitoring in a drive system by Lenze inverters or Controllers. In case of inverters,
these funcons are implemented by integrable safety modules and in case of Controllers by
the addionally required Safety Controller.
When planning systems/installaons of this kind, always observe the following:
•
When using just one single feedback system in the environment of these safety
applicaons, the applicable safety engineering standard IEC 61800-5-2 (adjustable speed
electrical power drive systems - Part: 5-2: Safety requirements - Funconal) spulates
special requirements for the connecon between feedback system and motor sha.
•
This is due to the fact that two-channel safety systems at this point in the mechanical
system are actually designed as single-channel systems. If this mechanical connecon is
designed with considerable overdimensioning, the standard permits exclusion of the fault
"encoder-sha breakage" or "encoder-sha slip". As such, the permissible angular
acceleraon limit values must not be exceeded for the individual drive soluons.
You can nd the limit values in the corresponding feedback data of the individual motor
ranges.
Speed-dependent safety funcons
Examples of speed-dependent safety funcons:
•
Safe stop 1 (SS1)
•
Safe operaonal stop (SOS)
•
Safely limited speed (SLS)
•
Safe maximum speed (SMS)
•
Safe direcon (SDI)
•
Operaon mode selector (OMS) with conrmaon (ES)
•
Safe speed monitor (SSM)
•
Safely limited increment (SLI)
Product extensions
Feedback
140