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CLP Processor
system:
- Primarily
on the CLP processor
board which is common to
the TNC 155 CLP/Graphics
board.
- Operating
system is contained
in EPROM IC-P2 -30.1-.
- The main task is the calculation
of the instantaneously
intended
values
of the analog
output
voltages
dependent
on:
.the instantaneous
actual
positions
.the programmed intended
position
.the distance
of the intended
position
(influence
on deceleration
ramp)
.the programmed feed rate
.the fast
traverse
rates
determined
per machine parameter
.the settings
of the override
and feed potentiometer
The calculating
speed requires
a wait-free
RAM -30.2--
- The measuring
system signals
are processed
on the analog
board.
These signals
are amplified
at first
-40.1-
and
then subdivided
-4O- by delaying
(phase shifted)
and
combining
them differently.
The subdivided
0 degree,
90 degrees
and RI signals
are then led to the gate arrays
-32-
of the CLP processor
board.
The gate arrays
are
especially
developed
LSI circuits
consisting
of different
gates and counters
in which the direction
of the movement
and the number of pulses
are calculated.
This information
can then be scanned by CLP processor
-3O- to ascertain
the actual
values
of the axes.
- The symmetry,
the on-to-off
ratio
and the amplitude
of the
system signals
are constantly
controlled
by a supervision
circuit
-4O-.
SERVICE MANUAL TNC 151/155
Page 52
Section
4.1
- The signals
from the handwheel
(if
present)
are shaped via
the functional
block
-43-
and are also processed
by the CLP
pr.JCeSSOr.
- If
the distance
between the control
and measuring
system is
more than 2Om. an EXE has to be interposed.
The measuring
signals
are thus already
amplified,
subdivided,
evaluated,
supervised
and converted
in TTL signals.
An "R" version
of
the control
is used accordingly
(e.g.
TNC 151 BR) equipped
with a combined EXE connection
for X-, Y-, and Z-axis
and
an analog board TTL. The input
amplifiers
and the wiring
for the signal
subdivision
are replaced
with
line
receivers
-4O- on this
analog board whose outputs
are directly
con-
nected to the gate arrays
-32-
on the CLP processor
board.
The supervision
signal
of the EXE is also buffered
-4O- and
transferred
to the CLP processor
board.
The signals
of the
handwheel
are likewise
processed
-43-
as on the "normal"
(sine)
analog board.
If
instead
of linear
position
transducers
incremental
enco-
ders are used to ascertain
actual
values
a reference
pulse
appears once per revolution.
Since only one reference
pulse
is to be evaluated
all
other
reference
pulses
of the axes
X, Y, Z, IV are inhibited
on the analog board
-4O-.
The
signal
lines
are connected
with the analog board via the PLC
I/O board and the PLC interface
board.
The level
conversion
MOS/TTL as well
as the galvanic
decoupling
is carried
out
on the PK interface
boards via -51-
and -5O-.
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