Siemens SINUMERIK 840Di Function Manual page 1636

Detailed Description
2.3 Feedrate control
The following permanent assignment applies to binary coding:
Code
00000000
00000001
00000010
00000011
00000100
.
.
.
01100100
.
.
.
11001000
With Gray coding, the override factors corresponding to the switch setting are entered in
machine data:
MD12010 OVR_ FACTOR_AX_ SPEED [n] (analysis of axis feedrate override switch).
Activation of axis-specific feedrate override
If G33, G34, G35 active:
If G63 active:
If G331, G332 active:
Spindle override" DB31, ...DBB0"
One enable signal and one byte is provided on the PLC interface for the override factor for
each of the spindles.
IS "Spindle override" (DB31, ... DBB19)
IS "Override active" (DB31, ... DBX1.7)
The interface for the spindle override can be provided by the PLC in binary-coded or Gray-
coded format.
Machine data:
MD12060 OVR_SPIND_IS_GRAY_CODE (spindle override switch is Gray-coded)
is used to define whether binary or Gray coding is active.
2-28
Override factor
0,00 ≙ 0%
0,01 ≙ 1%
0,02 ≙ 2%
0,03 ≙ 3%
0,04 ≙ 4%
.
.
.
1,00 ≙ 100%
.
.
.
2,00 ≙ 200%
Not effective
Not effective
(the override is set to a fixed value of 100% in the
NC)
Not effective
(the override is set to a fixed value of 100% in the
NC)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Feeds (V1)