Lenze i750 User Manual

Safe speed and posion analy
sis
Drive systems which are ouied with Lenze inverters of the "Extended Safety" variant
provide speed-dependent safety funcons for reliable speed monitoring and for reliable
posion monitoring.
For safe speed and posion detecon, you must connect a safety-rated motor/encoder
combinaon.
Important notes
DANGER!
Slip, sha fr
acture etc. between the motor and encoder system interfere with the reliability of
speed and posion detecon.
Speed-dependent and direcon-dependent funcons are executed incorrectly.
▶
Reliably exclude funconal errors via design measures.
▶
Ulize motors and encoder systems with guaranteed features.
In order to enable the reavailability of the absolute posion aer mains
s
witching without a new reference run (load stored reference), encoders with
absolute value informaon that covers the enre traversing range must be used.
Operaon with 1-enc
oder system with resolver
When using only one encoder in safety applicaons, theEN 61800‑5‑2 standard places
separate requirements on the connecon between the feedback system and the motor sha.
The oversized design prevents operaonal failures caused by encoder sha fracture or
encoder slippage on the motor sha. The acceleraon limit values in the drive soluons with a
resolver are not to be exceeded.
Limit values
Synchronous servo motors
Encoder type Encoder product code
Maximum permissible
angular acceler
aon
Minimum me per 1,000
1/min speed stroke
MCS 06
Resolver RV03
56,000 rad/s
2
1.9 ms
MCS 09 ... 19
19000 rad/s
2
5.5 ms
MDXKS 56 / 71
17000 rad/s
2
6.2 ms
Asynchronous servo
mot
ors
Encoder type Encoder product code Maximum permissible
angular acceleraon
Minimum me per 1,000
1/min speed stroke
MCA 10 ... 19
Resolver RV03
22000 rad/s
2
4.8 msMCA 20 ... 26
MQA 20 ... 26
Funconal sa
fety
Safe speed and posion analysis
Important notes
113

Lenze i750 Specifications

General

Brand	Lenze
Model	i750
Category	Inverter
Language	English