Detailed Description
2.3 Feedrate control
Feeds (V1)
2-30 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Override inactive
When the override is inactive (i.e., the above interface signals are set to “0”), the override
factor “1” is used internally on the NC (i.e., the override is 100%). In this case, the value
entered in the PLC interface has no effect.
Exceptions are the zero setting for a binary interface and the 1st switch setting for a Gray-
coded interface. In these cases, the override factors entered in the PLC interface are used.
With a binary interface, the override factor = 0. With a Gray-coded interface, the value
entered in the machine data for the 1st switch setting is output as the override value. This
should be initialized with "0" .
An override factor of 0% acts as a feedrate disable.
Spindle override reference
An entry is made in machine data:
MD12080 OVR_REFERENCE_IS_PROG_FEED (override reference velocity)
to indicate whether the spindle override relates to the speed limited using MD or SD or to the
programmed speed.
2.3.4 Programmable feedrate override
Function
The programmable feedrate override can be used to change the velocity level of path and
positioning axes by means of a command in the part program.
A separate feedrate override can be programmed for positioning axes.
Programming
The feedrate override can be changed with the following commands:
OVR= ....
Feedrate change for path feedrate F
OVRA[X1]= ...
Feedrate change for positioning feedrate FA
The programmable range is between 0 and 200%.
The default setting is 100%.
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