01/2007
1.1 Overview of SINUMERIK 840Di sl
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© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
The HMI Programming Package basically contains interface descriptions
and corresponding example applications. Detailed information on the OPC
interface can be called from the Internet at the address of OPC Foundation
(http://www.opcfoundation.org.).
Note
For a detailed list of the installed software components or the ones required to
prepare for installation, please refer to Section 1.2, Page 1-33.
1.1.5 Real–time properties
Windows XP is not an operating system designed for hard real–time require-
ments. Hard real–time requirements mean the operating system will respond to
an external event within a defined time frame of a few µseconds.
The NC system software is therefore integrated into Windows XP as a ”Kernel
mode driver”. This means it has its own integrated real–time system that runs
concurrently with Windows XP to ensure the conditions for real–time processing
are met.
Real–time violations occur when unsuitable PC components block interrupt
processing for too long, stopping the NC system software from being activated
at the specified time.
Inappropriate PC components are drivers or hardware extensions that have an
adverse effect on the real–time behavior due to overly long interrupt disable
times or PCI bus disables in PCI bus mastering.
With real–time violations exceeding 200 µ
s, we cannot guarantee that the NC
system software will operate correctly. The system will respond appropriately for
the magnitude of the real–time violation:
– Display of an error message
– Alarm with axis stop from the NC
– Alarm and drive–independent axis stop.
The real–time response can be monitored in the NCK latency displays in the
system diagnostics of the 840Di Start–up (see Subsection 1.5, Page 1-38) or
the NC/PLC diagnostics of HMI Advanced (see Subsection 11.11, Page
11-406).
The following points must be taken into account for screen resolution and depth
of color settings on the PCU.
S Screen resolution
The standard screen resolution setting depends on the optimized value that
was set for the operator panel. This value was defined for technical reasons
and should be adhered to.
Real–time
violations
Screen resolution
and depth of color
1 General Information on the SINUMERIK 840Di sl
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