Siemens IP-Module Manual Pagina 135

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IP 266 Machine Data, Modes and Traversing Programs
Figure 5-26. Voltage - Speed Characteristic with Drift Compensation
V
D
n
D
n
rated
n
-10V
+10V
Max. attainable with drift
compensation
V
n
rated
n : Speed
n
rated
: Rated speed
n
D
: Drift speed at 0 V
V : Output voltage
V
D
: Drift voltage for
0 speed
Optimum characteristics
W A R N I N G !
Serious errors disable the IP and produce a setpoint of 0 V without drift com-
pensation.
Serious errors are:
watchdog errors (internal errors)
resets
The drive moves if there is drift.
The graphic shows that it is no longer possible to cover the full speed range. A
portion of the high negative speed range can no longer be used.
If you were now to execute a positioning operation at a speed within this range,
the following error would continually increase. Figure 5-27 illustrates this more
clearly.
If the following error exceeds the specified maximum value, the IP 266 aborts the
positioning operation currently in progress and outputs an error message.
EWA 4NEB 812 6057-02
5-63
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