Position Detection, Indirect - Siemens SIMODRIVE 611 digital Configuration Manual

2 System Configuration
2.4 Position sensing/actual speed value sensing
2.4.2

Position detection, indirect

Measuring
systems
that can be
evaluated
SIMODRIVE 611
digital/universal
2-50
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S
Integrated incremental encoder in feed and main spindle motors
S
Integrated absolute encoder with EnDat interface in feed motors
S
Incremental encoder (SIMAG H) for sensing the rotary angle and the rotary
angle velocity
SIMAG H is used for hollow–shaft applications with 1FE1 and 1PH2 direct
drives and third–party spindles. It is also used as autonomous spindle en-
coder.
Reader's note
Reference: /PMH/ Measuring System for Main Spindle Drives
When the SINUMERIK 810D/840D and SIMODRIVE 611 are digitally linked,
the measuring systems are connected to the digital control units.
The controls are equipped by default with a connection for the measuring
system integrated in the feed and main spindle modules. Together with the high
resolution position detection of the digital controls, the integrated motor measur-
ing system achieves a resolution of 4,000,000 increments per revolution (Per-
formance Control). This makes an additional C–axis encoder unnecessary,
even on the main spindle.
The high–resolution actual position value is also transferred to the NC position
control loops via the drive bus so that, given the right mechanical conditions, a
direct table–top measuring system is no longer required.
The same secondary conditions/limitations apply for SIMODRIVE 611 universal
and POSMO SI/CD/CA. The only difference is the drive link established using
PROFIBUS DP.
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
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