Siemens SINUMERIK 840D sl Function Manual page 1664

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Z1: NC/PLC interface signals
19.12 Feeds (V1)
DB31, ...
DBB0
Feedrate override (axis-specific)
Signal state 1 or
The axis-specific feedrate override can be defined via the PLC in binary or Gray coding. With binary
edge change
coding, the feed value is interpreted in %. 0% to 200% feed changes are possible, in accordance with
0 → 1
the binary value in the byte.
The following permanent assignment applies:
Binary values > 200 are limited to 200%.
Using the machine data:
MD12100 $MN_OVR_FACTOR_LIMIT_BIN (limit for binary-coded override switch)
the maximum axis-specific feedrate override can be additionally limited.
In gray coding, the following codes are assigned to the individual switch settings:
1664
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions

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