Siemens SINUMERIK 840D Description Of Functions page 302

5 Commissioning
5.5 Diagnostics
The servo trace belongs to those measuring functions that request measured
values from the NCK via a parameterized PI service and graphically display the
measured values with respect to time. When successful, the NCK returns up to
4 measured value buffers to the HMI for evaluation.
Selecting signals When selecting signals, axes and signal names can be selected from the lists
for a maximum of 4 trace channels (trace 1 to trace 4). Trace 1 has a special
significance – a signal must be selected in trace 1 otherwise when the
PI service is started using the vertical "start" softkey, this is negatively
acknowledged from the NCK.
Measuring parameters For the measuring parameters, the measuring time, the trigger time, specific
thresholds and various trigger signals can be set (e.g. a trigger from the part
program). These settings are used to parameterize the PI services at segment
values and offset values of NCK using the vertical "start" softkey. A measure-
ment that has already been started can be interrupted using the vertical "stop"
softkey. In this case, the NCK does not supply any measured values.
Physical address If the physical address entry is selected in the signal selection list, the vertical
softkey having the same name is activated. Using the input masks under this
softkey, segment values and offset values of NCK system variables etc. can be
specified and then measured.
It is possible to scroll over the axes and spindles in the application using the
vertical "Axis +" and "Axis –" softkeys. The axis name or spindle name is
included in the selected selection list for the axis/spindle names.
Selecting SGE drive The selection of the SI signal SGE drive (from the PLC) is shown in the
following.
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
© Siemens AG 2003 All Rights Reserved
11.03