apfiff09 marine
VACON®
•
223
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Classified as Public
7.11.2
Master Follower: DriveSynch system
DriveSynch is used to control parallel drives. Up to four drives can be connected parallelly. The
motor can be a single winding motor or there can be several winding motors.
VACON
®
DriveSynch works in open loop and closed loop motor control modes. With closed loop
motor control, the encoder feedback needs to be wired only to the master drive. If redundancy is
required, it may be necessary to wire the encoder feedback also to follower drives using the double
encoder option board OPTA7.
Note:
In a DriveSynch system, only Master drive monitoring signals are reliable.
Only directly measured values are reliable in follower units. Even the Output Frequency of
DriveSynch follower is not directly observed and thus may not show actual output frequency that is
controlled by DriveSynch Master Drive.
Note!
The maximum switching frequency for the drives using VACON
®
DriveSynch is 3.6 kHz.
Minimum recommended switching frequency in Open Loop control is 1.7 kHz.
Minimum recommended switching frequency in Closed Loop control is 2.5 kHz.
Note!
The VACON
®
NXP control board must be VB00761 (NXP3) or newer.
OPT-D2 boards needs to VB276J or newer.
Master needs to be #1 and cannot be changed.
M
NXP
NXP
OP
TD2
OP
TD2
NXP
OP
TD2
NXP
OP
TD2
Optical bus
Mains supply
X5 : TX1
X6 : ON
X5 : TX2
X6 : ON
X5 : TX2
X6 : ON
X5 : TX2
X6 : ON
M
Y Y
NXP
OP
TD2
NXP
OP
TD2
Mains supply
X5 : TX1
X6 : ON
X5 : TX2
X6 : ON
Multiple winding motor
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