08.2012 Technology Option F01
Siemens AG 6SE7087-6QX70 (Version AN)
SIMOVERT MASTERDRIVES Compendium Motion Control 9-5
9.3.2 Positioning
The MASTERDRIVES MC servo converter has a convenient integrated
positioning control system with the following functions:
♦ Setup: Position-controlled axis travel in jog mode [819]
♦ Homing: The procedure used to zero the position measurement
system when an incremental encoder is used (not usually required
for absolute encoders) [821]
♦ MDI: Point-to-point positioning (Manual Data Input) [823]
• Relative or absolute positioning (absolute or incremental
dimensions)
• Definition of an MDI block with position, velocity and acceleration
• The MDI block can be defined directly from the machine control −
e.g. via PROFIBUS-DP − or can be retrieved, using control
commands, from a table of 10 fixed position setpoints stored on
the MASTERDRIVES MC. The start command can be
transmitted in the same PROFIBUS message as the MDI block,
a feature that allows convenient, time-optimized control of the
positioning operation from a mini PLC.
• It is possible to change to another MDI block on-the-fly during
traversing.
• The start command (and the read-in enable for the roll feed) can
be transmitted via digital inputs on the MASTERDRIVES MC or
via a field bus.
♦ Automatic mode: [826...828]
• Automatic execution of complete positioning programs
• Single-step mode possible
• Development of NC programs using a high-performance
programming language in conformity with DIN 66025 (the
standard of the German mechanical engineering industry)
• Input of NC programs via an S7-300 (input via parameter
interface and via the DriveMonitor service program under
development)
• Up to 20 programs with a total of 50 blocks (NC traversing
commands) programmable
• Program-driven output of switching functions (M functions)
• Block change on-the-fly via digital input
• Start and read-in enable also possible via digital input
• Programmable zero offset, tool offset and backlash
compensation
• G function acceleration control
• Set actual value on-the-fly
• Start command, block change and read-in enable definable via
field bus or digital inputs
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