NU8976A99 ABB Programmable Logic Controller for Distributed Control System

Description

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The parameters in Group 50 define the encoder signal decoding and
the operation of the ACS 600 in encoder or NTAC module fault
conditions. These parameters are available only after the
communication between the ACS 600 and the NTAC module is
activated with Parameter 98.1.
50.1 PULSE NR This parameter sets the number of encoder pulses per one revolution.
128 … 4096
50.2 SPEED
MEAS MODE
This parameter defines how the encoder pulses are calculated.
A –
– B DIR
Ch A: positive edges calculated for speed.
Ch B: direction.
A –
–
–
Ch A: positive and negative edges calculated for speed.
Ch B: not used.
A –
–
– B DIR
Ch A: positive and negative edges are calculated for speed.
Ch B: direction.
A –
–
– B –
–
–
All edges of the signals are calculated.
50.3 ENCODER FAULT This parameter defines the operation of the ACS 600 upon a
communication loss between the pulse encoder and the NTAC module,
or between the NTAC module and the ACS 600.
WARNING
A Warning indication is displayed on the control panel.
FAULT
A Fault indication is displayed on the control panel and the ACS 600
stops the motor.
50.4 ENCODER DELAY This parameter defines the time (in milliseconds) for which
communication may be lost until the ACS 600 takes the action selected
with Parameter 50.3.
0 … 50000