6Functions
Festo – GDCP-CMMP-M0-FW-E N – 1304N H 51
The line count can normally be found in a data sheet or the name plate for the shaft
encode r. Observe that specification of the line count is dependent on the track signals.
A/B-(N):
– A/B (quadrature evaluation): The line count of the master is entered with reference to
one revolution.
– Zero track: If the zero track is used, the specified line co unt must correspond to the
number of lines between index pulses.
CLK/DIR (pulse/direct io n):
– The number of lines of the master must be entered here related to 90° due to the
motor controller’s four-fold evaluation method.
CW/CCW (upward/downward c ounter):
– The number of lines of the master must be entered here related to 90° due to the
motor controller’s four-fold evaluation method.
After a change of the encoder data, you must save the data following download and per-
form a r estart with interruption of the power supply.
Tr acking
signals
1)
Description Option
A/B-(N)
Quadrature
evaluation
Standard incremental signals.
Two rectangular track signals whose
phases are offset by 90° are evaluated.
A defined pulse is output once per
revolution (=zero index).
The zero index can be used for definition
of a switching point, for counting revolu-
tions or for synchronisation of a follow-
ing counter.
– A/B track switch-off:
The incremental signals A/B are ignored
(“encoders standing still”).
– Zero track switch-off (ignore zero pulse):
The zero pulse generates a position jump
if nec essary if individual increments of
the A/B track are not correctly detected
during operat io n.
If the index pulse results in malfunc tions,
the signal can be suppressed.
CLK/DIR Pulse-direction interface.
The controller can also be controlled
from stepper motor controller cards
through these signal inputs.
– Counting signals switch-off:
The signals CLK/DIR are ignored
(“encoders standing still”).
CW/CCW Clockwise/counterclockwise counters
Two signals each separately supply the
change in position f or a direction of
rotation.
This means that when there is a pulse
train on o ne signal line, the other signal
line should be quiet.
– Counting signals switch-off:
The signals CLK/CCW are ignored
(“encoders standing still”).
1) In accordance with RS 422 specification, specifications must be taken from the data sheet of the encoder.
Tab. 6.15 Track signals (slave, input [X10] )
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