Siemens SINUMERIK 840D sl, Function Manual

Page: 2131 / 2184

Detailed Description
2.16 Feeds (V1)
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
135
DB21, ...
DBX6.6 Rapid traverse override active
Application
example(s)
The override value is generally selected using the rapid traverse override switch on the machine
control panel.
Using the interface signal:
DB21, ... DBX6.6 (rapid traverse override active),
the rapid traverse override switch can be enabled from the PLC user program while commissioning
a new NC program, e.g. using the key-operated switch.
Special cases,
errors, ......
The rapid traverse override is inactive when
G33
,
G63
,
G331
,
G332
are active.
Corresponding to .... DB21, ... DBB5 (rapid traverse override)
DB21, ...
DBX6.7 Feed rate override active
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
The feed rate override between 0 and a maximum of 200% entered at the PLC interface is active
for the path feed rate and therefore automatically for the related axes.
In JOG mode, the feed rate override acts directly on the axes.
The override factor is entered using the machine data:
MD12020 $MN_OVR_FEED_IS_GRAY_CODE (path feed rate override factor, gray-coded)
and
MD12030 $MN_OVR_FACTOR_FEEDRATE [n] (evaluation of the path feed rate override switch)
Signal state 0 or
edge change
1 → 0
The feed rate override entered at the PLC interface is ignored.
When the feed rate override is inactive, the NC always uses 100% as the internal override factor.
Exceptions are the zero setting for a binary interface and the 1st switch setting for a Graycoded
interface. In these cases, the override factors entered in the PLC interface are used. With a binary
interface, the override factor = 0. With a Graycoded interface, the value entered in the machine data
for the 1st switch setting is output as the override value.
Application
example(s)
The override value is generally selected using the feed rate override switch on the machine control
panel.
Using the interface signal:
DB21, ... DBX6.7 (feed rate override active),
the feed rate override switch can be enabled from the PLC user program while commissioning a
new NC program, e.g. using the key-operated switch.
Special cases,
errors, ......
The feed rate override is inactive when
G33
,
G63
,
G331
,
G332
are active.
Corresponding to .... DB21, ... DBB4 (feed rate override)