Shaft Synchro (Only In Ext2 Control) - ABB ACS800 Firmware Manual

Shaft synchro (Only in EXT2 Control)

The Shaft synchro function synchronises the Master and Follower drives when the
drives are in the Master/Follower mode (see section
drives (Only in EXT2 Control)
only when the drives are set to the speed mode. The function transfers the Master
drive position to the Follower and uses the difference between the positions as the
speed correction factor in the speed control loop of the Follower drive.
Note: The function can only be used if the drive is controlled from location EXT2.
The following figure gives an example of two motors in the Shaft synchro mode.
10.02, 11.06
START/STOP
DIRECTION
MASTER
COMMAND
DRIVE
SPEED REF
SPEED REF 3
2.02
Master
M1
INCREMENTAL
ENCODER
02.21 POS ACT PPU
MASTER POSITION
M2
FROM
START/STOP
MASTER
DIRECTION
DRIVE
COMMAND
CH2
COMM
SPD REF
TO MASTER
TO FOLLOWER
CONTROLLER
+
ACTUAL SPEED
78.xx
SYNC POS ERROR
2.23
SYNCHRO
SPEED CORRECTION FACTOR*
CONTROL
97.16 SPD CORR PTR
3.35
+.000.000.00
CONTROLLER
+
SHAFT
2.02
SCALE
‚
78.03
ACTUAL SPEED
on page 94). However, the synchronisation is in use
23.xx 60.xx
SPEED TORQUE REFER-
ENCE SELECTOR
SPEED
1
TORQUE
2
MIN 3
PID
4
MAX
ADD
2.09
TORQUE REF 2 TORQUE REF 3
* When Synchro function is not used,
external pointer parameter can be used to
write speed correction to this signal 3.35.
SPEED TORQUE REFER-
ENCE SELECTOR
SPEED
1
TORQUE
2
MIN 3
PID
4
MAX
ADD
2.09
TORQUE REF 2 TORQUE REF 3
Master/Follower use of several
TORQUE REFER-
ENCE CONTROL
0
0
5
2.10
Follower
M2
TORQUE REFER-
ENCE CONTROL
0
0
5
2.10
101
INVERTER
CONTROL
=
~
Inverter
INVERTER
CONTROL
=
~
Inverter
Program features