ABB ACS 800 Series, Firmware Manual

Page: 200 / 340

Actual signals and parameters
200
50 ENCODER MODULE
Encoder connection. Visible only when a pulse encoder module (optional) is
installed and activated with parameter
98.01 .
The settings will remain the same even though the application macro is
changed.
50.01 PULSE NR States the number of encoder pulses per one revolution.
0 … 29999 ppr Pulse number in pulses per round (ppr) 0 … 29999
50.02 SPEED MEAS MODE Defines how the encoder pulses are calculated.
A
-
-
B DIR Channel A: positive edges calculated for speed. Channel B: direction. 0
A
-
-
-
Channel A: positive and negative edges calculated for speed. Channel B: not
used. 1
A
-
-
-
B DIR Channel A: positive and negative edges are calculated for speed. Channel B:
direction. 2
A
-
-
-
B
-
-
-
All edges of the signals are calculated. 3
50.03 ENCODER FAULT Defines the operation of the drive if a failure is detected in communication
between the pulse encoder and the pulse encoder interface module, or
between the module and the drive. Encoder supervision function activates if
either of the following conditions is valid:
-The difference between the estimated and measured speed is greater than
20% of the motor nominal speed.
- No pulses are received from the encoder within the defined time (see
parameter
50.04 ) and the drive is simultaneously at the current or torque limit.
When the torque is zero or low, the shaft may not move and no pulses are
detected. This means that at low torque/current the missing-pulse-supervision
is not possible. Therefore there must be conditional torque or current limit in
the pulse supervision. Now the limit is the maximum torque/current, because
then the shaft is expected to move at least a little bit and at least some encoder
pulses are detected.
WARNING The drive generates a warning indication. 0
FAULT The drive trips on a fault, gives a fault indication and stops the motor. 65535
50.04 ENCODER DELAY Defines the time delay for the encoder supervision function at start (See
parameter
50.03 ).
Note : It the delay is set to 0 ms, encoder supervision at start is disabled.
0 … 50000 ms Time delay 0 … 50000
50.05 ENCODER DDCS CH Defines the fibre optic channel of the control board from which the drive
program reads the signals coming from the pulse encoder interface module.
The setting is valid only if the module is connected to the drive via the DDCS
link (that is not to the option slot of the drive).
CH 1 Signals via channel 1 (CH1). The pulse encoder interface module must be
connected to CH1 instead of CH2 in applications where CH2 is reserved by a
Master station (For example, a Master/Follower application). See also
parameter
70.03 .
1
CH 2 Signals via channel 2 (CH2). Can be used in most cases. 2
50.06 SPEED FB SEL Defines the speed feedback value used in control.
INTERNAL Calculated speed estimate 65535
ENCODER Actual speed measured with an encoder 0
Index Name/Selection Description FbEq