Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

Страница: 1724 / 1799

Z1: NC/PLC interface signals
19.12 Feeds (V1)
Basic Functions
1724
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
DB21, ...
DBX6.7 Feedrate override active
Edge evaluation: No Signal(s) updated: Cyclically
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)
DB21, ...
DBX12.3, DBX16.3,
DBX20.3
Feed stop (Geometry axis 1 to 3)
Edge evaluation: No Signal(s) updated: Cyclically
Signal state 1 or
edge change
0 → 1
The signal is only active in JOG mode.
The signal stops the feed of the geometry axis. This signal brings all traversing axes to a standstill
with controlled braking (ramp stop). No alarm is output.
The position control is retained, i.e. the following error is eliminated.
If - for a geometry axis - a travel request is issued with an active "feed stop", the request is kept. This
queued travel request is executed immediately after the "feed stop" is canceled.
Signal state 0 or
edge change
1 → 0
The feed is enabled for the geometry axis.
If, for the geometry axis, a travel request ("travel command") is active when the "feed stop" is
cancelled, this is executed immediately.