Siemens SIMOVERT MASTERDRIVES Manual page 698

Technology Option F01
NOTE
Linking the block
9-50
Example:
11 teeth
Motor
19 teeth
Gears
In the example, the motor makes 19 revolutions for 11 revolutions of
the load. The value 11 must be entered in U810.01, and the value 19 in
U810.02.
The ratio given on the gearbox rating plate is often only a rounded
value (e.g. 1:7,34). To prevent long-term drift on a rotary axis, the
actual ratio of gear teeth must be obtained from the gear manufacturer.
The principal configuration of the block for the motor encoder is shown
in function diagram 327. Slotting the block into a time slot automatically
ensures that the position acquisition for the motor encoder is placed at
the correct starting position. The revolution/overflow counter must be
connected with a tracking memory element parameterized for non-
volatile data storage. Storage is enabled when valid values are
transferred from the encoder evaluator (B070 on TRACK input). After
parameterization, the overflow counter should be reset once only and
the unit switched OFF and ON again. Thereafter, the overflow counter
must not be reset again. Depending on the tracking memory element,
the following wiring is necessary.
Tracking memory element 1
U950.76 = 4
U203.01 = B070
U204 = 625
U205 = 1
U811.01 = 551
The same function is provided by software version V1.50 and higher for
external encoders, too. The function is shown on function diagram 333.
The FD333 and FD327 function blocks differ only in terms of the
inclusion of parameter P116 (gear unit encoder-motor) in the position
tracking block for motor encoders.
Load
Tracking memory element 2
U952.69 = 4
U206.01 = B070
U207
U208
U811.01 = 552
6SE7087-6QX70 (Version AG)
Compendium Motion Control
05.2006
= 625
= 1
Siemens AG
SIMOVERT MASTERDRIVES