ABB ACS 800 Series, Firmware Manual

Page: 209 / 340

Actual signals and parameters
209
77.20 BASE SPEED Defines the base speed in rpm. This value is used to check for the actual motor
current when the motor speed crosses this value. The motor current when the
actual speed crosses this base speed in either forward or reverse direction is
checked for a period of Par.
77.03 HOLD RAMP. This motor current is further
used along with parameters 77.04 … 77.19 to calculate the speed limit in
forward and reverse directions. If the parameters 77.04 … 77.19 are not
configured properly in the correct sequence, the speed is always limited to this
value. For more information, see section
Load speed control on page 123.
0.0 … 18000.0 rpm Setting range in rpm. 0 … 180000
78 SHAFT SYNCRO Settings for Shaft synchronisation. See section Control location EXT1/EXT2
supervision mismatch on page 93. The drive has to be in EXT2 control location
for the function to be active.
78.01 SYNCRO CONTROL Defines whether the Synchro control is active or not. If this parameter is set to
OFF, the position error calculation, position correction, and synchronisation
error fault functions are not operational. This parameter should be active for
parameter
10.14 to be functional.
OFF Synchro control is not selected 0
ON Synchro control is selected 1
78.02 SYNCRO GAIN Defines the gain for the Synchro controller (P -Controller). Only used in
Follower drives. See section
Control location EXT1/EXT2 supervision
mismatch on page 93.
0... 100.00 Setting range 0... 10000
78.03 SHAFT SCALE Defines the scaling factor used for the shaft position in the Follower drives. The
scaling factor should be calculated as the ratio between the Master speed in
m/min or mm/min at the maximum speed defined to that of the Follower drive.
This factor is multiplied with the speed reference in the Follower drive only
when the Synchro control is on. Used only in Follower drives. See section
Control location EXT1/EXT2 supervision mismatch on page 93.
0... 100.00 Setting range 0... 100000
78.04 POS SCALE Defines the position scaling factor for the actual position value. The scaling
factor should be calculated as number of Pulses Per Unit (Pulses/mm). See
section
Actual position configuration based on a motor encoder signal on page
91.
0.1 … 10000.0 P/mm Setting range in pulses/mm 1 … 100000
78.05 POS CORR MAX LIM Defines the maximum limit for the position correction value. The difference
between the Master and Follower position in unit (mm) is limited to this value
before its given as a speed correction factor to the Follower speed loop.
0 … 100.0 mm Setting range in mm 0 … 1000
78.06 POS CORR MIN LIM Defines the minimum limit for the position correction value. The difference
between the Master and Follower position in unit (mm) is limited to this value
before its given as a speed correction factor to the Follower speed loop.
-100.0 … 0 mm Setting range in mm -1000 … 0
78.07 SYNC ERR FLT DLY Defines the time delay for the generation of SYNC FAULT when the absolute
difference between the Master and Follower position in unit (mm) is greater
than what is defined in Par.
78.09 . The fault will be generated in respective
Follower drives.
0 … 10 s Setting range in seconds 0 … 100
78.08
SYNC CORR SCALE Defines the scaling factor which will be used for the final speed correction
reference in slave speed loop. Scaling value will correspond to a correction of
that rpm for a position error of 1 mm.
Index Name/Selection Description FbEq