December 2001 Machine Axes 6 – 25
Setting the
software limit
switches
With the following machine parameters, you can set the software limit
switches for the various ranges of traverse. The position values are with
respect to the machine datum. Ranges of traverse 2 and 3 do not become
effective until they are activated by M4574, M4575 and M4135 or with
Module 9151 or 9152:
MP910.0-8 Positive software limit switches, traverse range 1 (default
setting after power on)
Input: -99 999.9999 to +99 999.9999 [mm] or [°]
MP911.0-8 Positive software limit switches, traverse range 2
Input: -99 999.9999 to +99 999.9999 [mm] or [°]
MP912.0-8 Positive software limit switches, traverse range 3
Input: -99 999.9999 to +99 999.9999 [mm] or [°]
MP920.0-8 Negative software limit switches, traverse range 1 (default
setting after power on)
Input: -99 999.9999 to +99 999.9999 [mm] or [°]
MP921.0-8 Negative software limit switches, traverse range 2
Input: -99 999.9999 to +99 999.9999 [mm] or [°]
MP922.0-8 Negative software limit switches, traverse range 3
Input: -99 999.9999 to +99 999.9999 [mm] or [°]
MP7490 Functions for traverse ranges
Format: %xxxx
Input: Bit 0 = 0: Display one traverse range via MOD
Bit 0 = 1: Display three traverse ranges via MOD
Bit 1 = 0: Each traverse range has its own datum
(and 3 memories for the positions of the swivel head)
Bit 1 = 1: One datum for all traverse ranges
The NC reports the activation of limit switches in words W1034 and W1036 to
the PLC:
Note
As of NC software 280 476-01 you can save the values for MP910.x,
MP911.x, MP912.x, MP920.x, MP921.x and MP922.x with the actual-
position-capture key.
Set Reset
W1034 Positive software limit switch was
traversed
Bits 0 to 8 represent axes 1 to 9
NC NC
W1036 Negative software limit switch was
traversed
Bits 0 to 8 represent axes 1 to 9
NC NC
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