Siemens SINUMERIK 840D Programming Guide

4
08.97 Protection Zones
4.2 Activatin
g
/deactivatin
g
p
rotection zones: CPROT
,
NPROT
4
840D
NCU 571
840D
NCU 572
NCU 573
FM-NC 810D 840Di

Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
4-145
Sequence
Activation status
A protection zone is generally activated in the part
program with status = 2.
The status is always channel-specific even for
machine-oriented protection zones.
If a PLC user program provides for a protection zone to
be effectively set by a PLC user program, the required
preactivation is implemented with status = 1.
The protection zones are deactivated and therefore
disabled with Status = 0. No offset is necessary.
Offset of protection zones on
(pre)activation
The offset can take place in 1, 2, or 3 dimensions.
The offset refers to:
•
the machine zero in workpiece-specific protection
zones,
•
the tool carrier reference point F in tool-specific
protection zones.
Additional notes
Protection zones can be activated straight after booting
and subsequent reference point approach. The system
variable
$SN_PA_ACTIV_IMMED [n]
or
$SN_PA_ACTIV_IMMED[n] = TRUE
must be set for
this. They are always activated with Status = 2 and have
no offset.

Siemens SINUMERIK 840D Specifications

General

Series	SINUMERIK 840D
Axes	Up to 31
Channels	Up to 10
Operating System	Windows-based
Power Supply	24 V DC
Control Unit Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
Interpolation	Spline
PLC	Integrated PLC
Data Storage	CompactFlash, USB