Siemens SINUMERIK 805 Operating Instructions Manual page 116

06.90
4
Data
Area
4.7.2 Service
Explanation of service data:
The actual
position of the axis. The
position is
displayed in the
machine reference
system (no allowance made for ZO and
TO) in position control resolution units.
Absolute actual value
Example: If 200 000 is displayed
at
a position control
resolution of 0.5
•
10
3 mm, this means that the
axis is
at
position 100 (referred to machine
zero).
•
Following error
The difference between the position controller
command value
and the absolute value. The following error is displayed in
position control resolution units.
Example:
If 2 000 is displayed
at a position control
resolution of 0.5
•
10 '3, this means
that following
error is
1
mm.
Command value
This
is the programmed
target
position. When the axis is in the
target position (with no
movement),
the command value is
equal
to
the absolute
actual value (if there are any
discrepancies, these can be removed by drift compensation).
The command value is displayed in position contorl resolution
units.
Example:
If 208 000 is displayed
at
a position control
resolution of 0.5 10-3, this means a
command
value of 104 mm (referred
to
machine
zero).
•
Speed command value
This
is the speed command value determined by the control
which is supplied
to
the drive actuator as an
analog voltage
value.
Unit: 1 .22 mV
(
8192 VELO
1
VELO)
10 V
Example: The displayed value 5638 corresponds
to
a
speed command value of 6.87836.
Part actual value
The pulses
generated by the measuring
system multiplied by 4
per position controller sampling interval
(5 ms). It is necessary
to
multiply the number by
4
so that the
part
actual value
(sampling interval 5
ms)
can be compared
to the
part
command value (sampling interval
20 ms).
Unit: position control resolution
(standard: 0.5
pm)
Example: The displayed value 24 corresponds
to
a
1
2 pm
path every 20 ms at a position control resolution
of 0.5 pm.
Part command value Pulses
sent to the position control from the interpolator every
interpolator cycle (20 ms).
Unit: position control
resolution (standard: 0.5 pm)
Displayed value
1 8 corresponds
to
a 9 pm path
every 20 ms at a position control
resolution
of 0.5 pm.
Example:
©
4-48
Siemens AG
1990 Alt Rights
Reserved
6ZB5 410-0EE02
SINUMERIK
805,
SW2 (BA)
• iniihiiiiioi