July 2013 6.8 The control loop 839
Rapid traverse and
feed rate limiting
If more than one axis is moved simultaneously, the rapid traverse on the path
v
path
is formed from the appropriate axis components. The same also applies
to the path acceleration (see "Interpolator" on page 814).
If there are problems with the inverter, e.g. because the energy being
generated from the axes in motion cannot be dissipated, you can limit the
rapid traverse on the path:
Enter the maximum rapid traverse on the path in MP1011.
Enter the inputs axis-specifically in MP1010.x.
With MP1012.x you can enter a second axis-specific rapid traverse as an
alternative to MP1010.x. Use the FN17: SYSWRITE ID 20 NR 18 = <value>
function to switch between the two machine parameters. MP1012 can only
be used in the Program Run, Single Block, and MDI operating modes.
<value> = 0: MP1010 and MP1011 active
<value> = 1: MP1012 active, MP1011 not active, meaning that the possible
increase in the contouring feed rate is not limited.
The rapid traverse from MP1010 in connection with MP1011 is always
active at program end and when a program is first selected.
The feed rate can be limited via the PLC:
Enter the reduced maximum contouring feed rate in D596.
Limit the feed rate axis-specifically with Module 9140. It can be read with
Module 9141.
If the value in D596 is greater than MP1011, then MP1011 becomes effective.
After the control is switched on, or after an interruption of the PLC run, D596
is preassigned with the value 300 000 so that MP1011 becomes effective.
Rapid traverse can be limited by the user with the F MAX soft key. This
limitation is not effective if M4587 is set. In this case only limitation through
D596 is effective. After M4587 is reset, both D596 and the last limit set via the
F MAX soft key are effective again. Limitation of rapid traverse via the F MAX
soft key can be rescinded with the RESET soft key. The value from MP1011
then becomes active again.
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